WO2023277466A1 - 반도체 발광소자를 포함하는 디스플레이 장치 - Google Patents
반도체 발광소자를 포함하는 디스플레이 장치 Download PDFInfo
- Publication number
- WO2023277466A1 WO2023277466A1 PCT/KR2022/009066 KR2022009066W WO2023277466A1 WO 2023277466 A1 WO2023277466 A1 WO 2023277466A1 KR 2022009066 W KR2022009066 W KR 2022009066W WO 2023277466 A1 WO2023277466 A1 WO 2023277466A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- light emitting
- assembly
- disposed
- display device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/441—Interconnections, e.g. scanning lines
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/451—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs characterised by the compositions or shapes of the interlayer dielectrics
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
- H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/10—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00
- H10H29/14—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 comprising multiple light-emitting semiconductor components
- H10H29/142—Two-dimensional arrangements, e.g. asymmetric LED layout
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/30—Active-matrix LED displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/30—Active-matrix LED displays
- H10H29/49—Interconnections, e.g. wiring lines or terminals
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/01—Manufacture or treatment
- H10H29/03—Manufacture or treatment using mass transfer of LEDs, e.g. by using liquid suspensions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/30—Active-matrix LED displays
- H10H29/37—Pixel-defining structures, e.g. banks between the LEDs
Definitions
- the embodiment relates to a display device, and more particularly, to a display device using a semiconductor light emitting device.
- Display devices used in computer monitors, TVs, and mobile phones include organic light emitting displays (OLEDs) that emit light by themselves, liquid crystal displays (LCDs) that require a separate light source, and micro-LEDs. display, etc.
- OLEDs organic light emitting displays
- LCDs liquid crystal displays
- micro-LEDs micro-LEDs. display, etc.
- a micro-LED display is a display using a micro-LED, which is a semiconductor light emitting device having a diameter or cross-sectional area of 100 ⁇ m or less, as a display device.
- Micro-LED display has excellent performance in many characteristics such as contrast ratio, response speed, color reproducibility, viewing angle, brightness, resolution, lifespan, luminous efficiency or luminance because it uses micro-LED, which is a semiconductor light emitting device, as a display element.
- the micro-LED display has the advantage of being free to adjust the size or resolution as screens can be separated and combined in a modular manner, and can implement a flexible display.
- the self-assembly method is a method in which a semiconductor light emitting device finds an assembly position by itself in a fluid, and is an advantageous method for realizing a large-screen display device.
- a new light emitting device collides with the assembled light emitting device due to force generated in the assembly hole, and thus damage may occur to the light emitting device.
- a technical problem of the embodiment is to provide a display device in which an assembly rate of a light emitting device is improved by implementing assembled wiring in various forms.
- a technical problem of the embodiment is to provide a display device that minimizes corrosion of assembled wiring.
- a technical problem of the embodiment is to provide a display device with precisely controlled spacing between assembled wires.
- the tasks of the embodiments are not limited to the tasks mentioned above, but include what can be grasped from the specification.
- a display device including a semiconductor light emitting device includes a substrate, first assembly wires and second assembly wires alternately disposed on the substrate and spaced apart from each other, the first assembly wires and the second assembly wires A first insulating layer disposed between and having a first thickness and a second thickness different from each other, a planarization layer disposed on the first assembly line and the second assembly line and having a first opening, and the first opening It may include a light emitting element disposed on the inner side and having a first electrode overlapping the first assembly line and the second assembly line.
- the first electrode may be electrically connected to one of the first assembly line and the second assembly line.
- the first thickness is a thickness of the first insulating layer in a region within the first opening
- the second thickness is a thickness of the first insulating layer in a region other than the first opening
- the second thickness is It may be thicker than the first thickness
- the first thickness is a thickness of the first insulating layer in a region within the first opening
- the second thickness is a thickness of the first insulating layer in a region other than the first opening
- the second thickness is a thickness of the first insulating layer. It can be thicker than thick.
- first conductive layer and the second conductive layer may overlap the planarization layer, and a portion of each of the first cladding layer and the second cladding layer may be disposed inside the first opening. .
- the second cladding layer may cover the first conductive layer on the first conductive layer.
- a third cladding layer disposed under the first insulating layer on the same plane as the first cladding layer, wherein the third cladding layer conducts the second conductive material through a contact hole included in the first insulating layer. layers can be connected.
- a second insulating layer covering the first clad layer may be further included on the first clad layer.
- the first opening may further include a reflective layer disposed on a side surface of the planarization layer.
- the embodiment may further include a third insulating layer disposed on the planarization layer.
- the first assembly wire may vertically overlap the second assembly wire, and the second assembly wire may include an electrode hole in a region vertically overlapping the first assembly wire.
- a display device including a semiconductor light emitting device includes a substrate on which a plurality of sub-pixels are defined, a first assembly line disposed along a plurality of sub-pixels disposed on the same line among the plurality of sub-pixels, Second assembly wirings disposed along a plurality of sub-pixels disposed on the same line among the plurality of sub-pixels and disposed adjacent to each of the first assembly wirings, and overlapping the first assembly wirings and the second assembly wirings.
- a planarization layer including a first opening to form a planarization layer, a first insulating layer having a plurality of thicknesses on the first assembly line, and disposed in the first opening in each of the plurality of sub-pixels, electrically connected to the second assembly line.
- a connected light emitting device may be included.
- the first insulating layer has a first thickness in a region overlapping the first opening and has a second thickness in a region not overlapping the first opening, wherein the second thickness is the first thickness. It can be thicker than thick.
- the second assembly wiring may be disposed on the first insulating layer.
- the first assembly wiring includes a first conductive layer and a first cladding layer electrically connected to the first conductive layer
- the second assembly wiring includes a second conductive layer and electrically connected to the second conductive layer.
- a second clad layer may be included, the first conductive layer and the first clad layer may be made of different materials, and the second conductive layer and the second clad layer may be made of different materials.
- Both the first clad layer and the second clad layer may extend into the second opening.
- the first conductive layer and the first clad layer include a stepped region, and the embodiment includes a second insulating layer disposed on the first assembled wiring and overlapping the stepped region. can include more.
- the second insulating layer may be disposed in the first opening.
- the second insulating layer may overlap the first assembly line.
- the embodiment may further include a third insulating layer disposed on the planarization layer.
- the first assembly wire may vertically overlap the second assembly wire, and the second assembly wire may include an electrode hole in a region vertically overlapping the first assembly wire.
- the insulation property of the insulating layer is prevented from being destroyed by increasing the thickness of the insulating layer disposed between the first assembly line and the second assembly line, and the thickness of the insulation layer disposed on the first assembly line is reduced. This has a technical effect of facilitating self-assembly of the light emitting device through a plurality of assembly wires.
- the embodiment has a technical effect of reducing corrosion and short circuit defects of a plurality of assembled wires.
- corrosion and short circuit defects can be reduced by disposing an insulating layer on a stepped region of a plurality of assembled wires.
- corrosion of the conductive layer can be prevented by using a cladding layer resistant to corrosion.
- the embodiment has a technical effect of stably bonding a plurality of light emitting elements by reducing a step between a plurality of assembled wires.
- the embodiment has a technical effect of reinforcing the assembly force of the light emitting device by arranging a plurality of assembly lines in a vertical symmetrical structure.
- the embodiment has a technical effect of solving the problem of the light emitting element leaning by supporting the light emitting element with one assembled wire.
- the embodiment has a technical effect of improving assembly efficiency and protecting assembled light emitting devices by forming an insulating layer thickly in an area other than the assembly hole.
- FIG. 1 is a schematic plan view of a display device according to an exemplary embodiment.
- FIG. 2 is a schematic enlarged plan view of a display device according to an exemplary embodiment.
- FIG. 3 is a cross-sectional view taken along line III-III' of FIG. 2 .
- 4A and 4B are process charts for explaining a method of manufacturing a display device according to an embodiment.
- FIG. 5 is a cross-sectional view of a display device according to a second embodiment.
- FIG. 6 is a cross-sectional view of a display device according to a third embodiment.
- FIG. 7 is a cross-sectional view of a display device according to a fourth embodiment.
- FIG. 8 is a cross-sectional view of a display device according to a fifth embodiment.
- FIG 9 is a cross-sectional view of a display device according to a sixth embodiment.
- FIG. 10 is a cross-sectional view of a display device according to a sixth embodiment.
- FIG. 11 is a cross-sectional view of a display device according to a seventh embodiment.
- Fig. 12 is an enlarged perspective view of a part of the seventh embodiment.
- Display devices described in this specification include digital TVs, mobile phones, smart phones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation devices, and slates. ) PC, tablet PC, ultra-book, desktop computer, etc. may be included.
- PDAs personal digital assistants
- PMPs portable multimedia players
- PC tablet PC
- ultra-book desktop computer, etc.
- the configuration according to the embodiment described in this specification can be applied to a device capable of displaying even a new product type to be developed in the future.
- FIG. 1 is a schematic plan view of a display device according to an exemplary embodiment.
- the substrate 110 and the plurality of sub-pixels SP among various components of the display device 100 are illustrated for convenience of explanation.
- the display device 100 may include a flexible display fabricated on a thin and flexible substrate.
- a flexible display can be bent or rolled like paper while maintaining characteristics of a conventional flat panel display.
- a unit pixel means a minimum unit for implementing one color.
- a unit pixel of the flexible display may be implemented by a light emitting device.
- the light emitting device may be a Micro-LED or a Nano-LED, but is not limited thereto.
- the substrate 110 is a component for supporting various components included in the display device 100 and may be made of an insulating material.
- the substrate 110 may be made of glass or resin.
- the substrate 110 may be made of a polymer or plastic, or may be made of a material having flexibility.
- the substrate 110 includes a display area AA and a non-display area NA.
- the display area AA is an area where a plurality of sub-pixels SP are disposed to display an image.
- Each of the plurality of sub-pixels SP is an individual unit emitting light, and a light emitting element LED and a driving circuit are formed in each of the plurality of sub-pixels SP.
- the plurality of sub-pixels SP may include a red sub-pixel, a green sub-pixel, a blue sub-pixel, and/or a white sub-pixel, but are not limited thereto.
- a description will be made on the assumption that the plurality of sub-pixels SP includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, but is not limited thereto.
- the non-display area NA is an area in which an image is not displayed, and is an area where various wires, driving ICs, etc. for driving the sub-pixels SP disposed in the display area AA are disposed.
- various ICs such as a gate driver IC and a data driver IC and driving circuits may be disposed in the non-display area NA.
- the non-display area NA may be located on the rear surface of the substrate 110, that is, the surface without the sub-pixel SP, or may be omitted, and is not limited to what is shown in the drawings.
- the display device 100 of the embodiment may drive a light emitting element in an active matrix (AM) method or a passive matrix (PM) method.
- AM active matrix
- PM passive matrix
- FIGS. 2 and 3 are referred to together for a more detailed description of the plurality of sub-pixels SP.
- FIG. 2 is a schematic enlarged plan view of a display device according to an exemplary embodiment.
- FIG. 3 is a cross-sectional view taken along line III-III' of FIG. 2 .
- the display device 100 includes a plurality of scan wires (SL), a plurality of data wires (DL), a plurality of high-potential power supply wires (VDD), and a plurality of assembly wires.
- a storage capacitor (ST) a semiconductor light emitting device (LED), a light blocking layer (LS), a buffer layer 111, a gate insulating layer 112, a plurality of passivation layers 113, 115, and 116, a plurality of planarization layers 114, 117, 118), a connection electrode CE, and a pixel electrode PE.
- the wiring 120 may extend in a column direction between the plurality of sub-pixels SP.
- the third layer VDD3 of the plurality of scan lines SL and the high potential power line VDD may extend between the plurality of sub-pixels SP in a row direction.
- a first transistor TR1 , a second transistor TR2 , a third transistor TR3 , and a storage capacitor ST may be disposed in each of the plurality of sub-pixels SP.
- a first layer VDD1 of a high potential power line VDD and a light blocking layer LS may be disposed on the substrate 110 .
- the high-potential power supply line VDD is a line that transmits a high-potential power supply voltage to each of the plurality of sub-pixels SP.
- the plurality of high-potential power lines VDD may transmit high-potential power voltages to the second transistor TR2 of each of the plurality of sub-pixels SP.
- the plurality of high potential power supply lines VDD may be formed of a single layer or a plurality of layers.
- the plurality of high potential power lines VDD are formed of a plurality of layers. do.
- the high potential power line VDD includes a plurality of first layers VDD1 and a plurality of second layers VDD2 and a plurality of third layers VDD3 connecting them.
- the first layer VDD1 may extend in a column direction between each of the plurality of sub-pixels SP.
- a light blocking layer LS may be disposed on each of the plurality of sub-pixels SP on the substrate 110 .
- the light blocking layer LS blocks light incident from a lower portion of the substrate 110 to the second active layer ACT2 of the second transistor TR2 to be described later, thereby minimizing leakage current.
- a buffer layer 111 may be disposed on the first layer VDD1 of the high potential power line VDD and the light blocking layer LS.
- the buffer layer 111 may reduce penetration of moisture or impurities through the substrate 110 .
- the buffer layer 111 may include, for example, a single layer or a multi-layer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.
- SiOx silicon oxide
- SiNx silicon nitride
- the buffer layer 111 may be omitted depending on the type of substrate 110 or the type of transistor, but is not limited thereto.
- a plurality of scan lines SL, a plurality of reference lines RL, a plurality of data lines DL, a first transistor TR1, a second transistor TR2, a third transistor TR3, and a storage capacitor ST. may be disposed on the buffer layer 111 .
- the first transistor TR1 may be disposed in each of the plurality of sub-pixels SP.
- the first transistor TR1 may include a first active layer ACT1, a first gate electrode GE1, a first source electrode SE1, and a first drain electrode DE1.
- the first active layer ACT1 may be disposed on the buffer layer 111 .
- the first active layer ACT1 may be made of a semiconductor material such as an oxide semiconductor, amorphous silicon, or polysilicon, but is not limited thereto.
- the gate insulating layer 112 may be disposed on the first active layer ACT1.
- the gate insulating layer 112 is an insulating layer for insulating the first active layer ACT1 and the first gate electrode GE1, and may include a single layer or a multi-layer of silicon oxide (SiOx) or silicon nitride (SiNx). However, it is not limited thereto.
- the first gate electrode GE1 may be disposed on the gate insulating layer 112 .
- the first gate electrode GE1 may be electrically connected to the scan line SL.
- the first gate electrode GE1 is made of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or an alloy thereof. It may be, but is not limited thereto.
- the first passivation layer 113 may be disposed on the first gate electrode GE1. A contact hole through which each of the first source electrode SE1 and the first drain electrode DE1 is connected to the first active layer ACT1 is formed in the first passivation layer 113 .
- the first passivation layer 113 is an insulating layer for protecting the lower portion of the first passivation layer 113, and may be composed of a single layer or multiple layers of silicon oxide (SiOx) or silicon nitride (SiNx), but is limited thereto. It doesn't work.
- a first source electrode SE1 and a first drain electrode DE1 electrically connected to the first active layer ACT1 may be disposed on the first passivation layer 113 .
- the first drain electrode DE1 may be connected to the data line DL, and the first source electrode SE1 may be connected to the second gate electrode GE2 of the second transistor TR2.
- the first source electrode SE1 and the first drain electrode DE1 may be formed of a conductive material, for example, copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium ( Cr) or an alloy thereof, but is not limited thereto.
- the first source electrode SE1 and the first drain electrode DE1 are respectively connected to the second gate electrode GE2 and the data line DL, but the first source electrode depends on the type of transistor.
- SE1 may be connected to the data line DL, and the first drain electrode DE1 may be connected to the second gate electrode GE2 of the second transistor TR2, but is not limited thereto.
- the first transistor TR1 may be turned on or turned off according to a scan signal when the first gate electrode GE1 is connected to the scan line SL.
- the first transistor TR1 may transmit a data voltage to the second gate electrode GE2 of the second transistor TR2 based on the scan signal and may be referred to as a switching transistor.
- a plurality of data lines DL and a plurality of reference lines RL along with the first gate electrode GE1 may be disposed on the gate insulating layer 112 .
- the plurality of data lines DL and reference lines RL may be formed of the same material and process as those of the first gate electrode GE1.
- the plurality of data lines DL are wires that transfer data voltages to each of the plurality of sub-pixels SP.
- the plurality of data lines DL may transfer data voltages to the first transistor TR1 of each of the plurality of sub-pixels SP.
- the plurality of data lines DL include a data line DL transferring data voltages to the red sub-pixel SPR, a data line DL transferring data voltages to the green sub-pixel SPG, and a blue sub-pixel SPG. It may include a data line DL that transmits data voltages to the pixel SPB.
- the plurality of reference lines RL is a line that transmits a reference voltage to each of the plurality of sub-pixels SP.
- the plurality of reference wires RL may transfer the reference voltage to the third transistor TR3 of each of the plurality of sub-pixels SP.
- a second transistor TR2 may be disposed in each of the plurality of sub-pixels SP.
- the second transistor TR2 may include a second active layer ACT2, a second gate electrode GE2, a second source electrode SE2, and a second drain electrode DE2.
- the second active layer ACT2 may be disposed on the buffer layer 111 .
- the second active layer ACT2 may be made of a semiconductor material such as an oxide semiconductor, amorphous silicon, or polysilicon, but is not limited thereto.
- the gate insulating layer 112 may be disposed on the second active layer ACT2 , and the second gate electrode GE2 may be disposed on the gate insulating layer 112 .
- the second gate electrode GE2 may be electrically connected to the first source electrode SE1 of the first transistor TR1.
- the second gate electrode GE2 is made of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or an alloy thereof. It may be, but is not limited thereto.
- the first passivation layer 113 may be disposed on the second gate electrode GE2 , and the second source electrode SE2 and the second drain electrode DE2 may be disposed on the first passivation layer 113 .
- the second source electrode SE2 may be electrically connected to the second active layer ACT2.
- the second drain electrode DE2 may be electrically connected to the second active layer ACT2 and electrically connected to the high potential power line VDD.
- the second drain electrode DE2 may be disposed between the first layer VDD1 and the second layer VDD2 of the high potential power line VDD and electrically connected to the high potential power line VDD.
- the second transistor TR2 has a second gate electrode GE2 connected to the first source electrode SE1 of the first transistor TR1 and is turned on by a data voltage transmitted when the first transistor TR1 is turned on. can be on Also, since the turned-on second transistor TR2 may transfer driving current to the light emitting device LED based on the high potential power supply voltage from the high potential power line VDD, it may be referred to as a driving transistor.
- the third transistor TR3 may be disposed in each of the plurality of sub-pixels SP.
- the third transistor TR3 includes a third active layer ACT3, a third gate electrode GE3, a third source electrode SE3, and a third drain electrode DE3.
- the third active layer ACT3 may be disposed on the buffer layer 111 .
- the third active layer ACT3 may be made of a semiconductor material such as oxide semiconductor, amorphous silicon, or polysilicon, but is not limited thereto.
- a gate insulating layer 112 may be disposed on the third active layer ACT3 , and a third gate electrode GE3 may be disposed on the gate insulating layer 112 .
- the third gate electrode GE3 is connected to the scan line SL, and the third transistor TR3 can be turned on or off by a scan signal.
- the third gate electrode GE3 is made of a conductive material such as copper (Cu), aluminum (Al), molybdenum (Mo), nickel (Ni), titanium (Ti), chromium (Cr), or an alloy thereof. It may be, but is not limited thereto.
- the third gate electrode GE3 and the first gate electrode GE1 are connected to the same scan line SL
- the third gate electrode GE3 is a different scan line from the first gate electrode GE1. (SL) may be connected, but is not limited thereto.
- the first passivation layer 113 may be disposed on the third gate electrode GE3 , and the third source electrode SE3 and the third drain electrode DE3 may be disposed on the first passivation layer 113 .
- the third source electrode SE3 is integrally formed with the second source electrode SE2 and is electrically connected to the third active layer ACT3 and electrically connected to the second source electrode SE2 of the second transistor TR2. can be connected to Also, the third drain electrode DE3 may be electrically connected to the reference line RL.
- the third transistor TR3 electrically connected to the second source electrode SE2 of the second transistor TR2 as a driving transistor, the reference line RL, and the storage capacitor ST may be referred to as a sensing transistor.
- a storage capacitor ST may be disposed in each of the plurality of sub-pixels SP.
- the storage capacitor ST includes a first capacitor electrode ST1 and a second capacitor electrode ST2.
- the storage capacitor ST is connected between the second gate electrode GE2 and the second source electrode SE2 of the second transistor TR2 and stores a voltage so that the light emitting element LED emits light while the second transistor ( The voltage level of the gate electrode of TR2) may be kept constant.
- the first capacitor electrode ST1 may be integrally formed with the second gate electrode GE2 of the second transistor TR2. Accordingly, the first capacitor electrode ST1 may be electrically connected to the second gate electrode GE2 of the second transistor TR2 and the first source electrode SE1 of the first transistor TR1.
- the second capacitor electrode ST2 may be disposed on the first capacitor electrode ST1 with the first passivation layer 113 therebetween.
- the second capacitor electrode ST2 may be integrally formed with the second source electrode SE2 of the second transistor TR2 and the third source electrode SE3 of the third transistor TR3. Accordingly, the second capacitor electrode ST2 may be electrically connected to the second transistor TR2 and the third transistor TR3.
- the plurality of scan wires SL includes a first source electrode SE1, a first drain electrode DE1, a second source electrode SE2, a second drain electrode DE2, a third source electrode SE3, It may be disposed on the first passivation layer 113 together with the third drain electrode DE3 and the second capacitor electrode ST2.
- the plurality of scan lines SL is a line that transmits a scan signal to each of the plurality of sub-pixels SP.
- the plurality of scan lines SL may transfer scan signals to the first transistor TR1 of each of the plurality of sub-pixels SP.
- each of the plurality of scan lines SL may extend in a row direction and transmit a scan signal to a plurality of sub-pixels SP disposed in the same row.
- the first planarization layer 114 includes a plurality of scan lines SL, a plurality of reference lines RL, a plurality of data lines DL, a first transistor TR1, a second transistor TR2, 3 may be disposed on the transistor TR3 and the storage capacitor ST.
- the first planarization layer 114 may planarize an upper portion of the substrate 110 on which a plurality of transistors are disposed.
- the first planarization layer 114 may be composed of a single layer or multiple layers, and may be made of, for example, an acryl-based organic material, but is not limited thereto.
- the second passivation layer 115 may be disposed on the first planarization layer 114 .
- the second passivation layer 115 is an insulating layer for protecting the lower portion of the second passivation layer 115 and improving the adhesion of the components formed on the second passivation layer 115, and is made of silicon oxide (SiOx) or It may be composed of a single layer or multiple layers of silicon nitride (SiNx), but is not limited thereto.
- the second layer VDD2 of the high potential power supply line VDD, the plurality of first assembly lines 121 among the plurality of assembly lines 120, and the connection electrode CE are disposed on the second passivation layer 115.
- the plurality of assembly lines 120 generate an electric field for aligning the plurality of light emitting devices (LED) when manufacturing the display device 100, and generate an electric field for arranging the plurality of light emitting devices (LED) when the display device 100 is driven. It may be a wire supplying a low-potential power supply voltage. Accordingly, the assembled wiring 120 may be referred to as a low-potential power supply wiring.
- the plurality of assembly wires 120 may be disposed in a column direction along the plurality of sub-pixels SP disposed on the same line. The plurality of assembly wires 120 may be disposed to overlap a plurality of sub-pixels SP disposed in the same column.
- one first assembly wire 121 and one second assembly wire 122 are disposed in the red sub-pixel SPR disposed in the same column, and one first assembly wire 121 is disposed in the green sub-pixel SPG ( 121) and the second assembly wire 122 may be disposed, and one first assembly wire 121 and one second assembly wire 122 may be disposed in the blue sub-pixel SPB.
- the plurality of assembly wires 120 may include a plurality of first assembly wires 121 and a plurality of second assembly wires 122 .
- the same low potential voltage as AC may be applied to the plurality of first assembly wires 121 and the plurality of second assembly wires 122 .
- the plurality of first assembly wires 121 and the plurality of second assembly wires 122 may be alternately disposed.
- one first assembly line 121 and one second assembly line 122 may be disposed adjacent to each other.
- the plurality of first assembly wires 121 and the plurality of second assembly wires 122 may be made of a conductive material, such as copper (Cu) or chromium (Cr), but are not limited thereto.
- the plurality of first assembly wires 121 may include a first conductive layer 121a and a first clad layer 121b.
- the first conductive layer 121a may be disposed on the second passivation layer 115 .
- the first cladding layer 121b may contact the first conductive layer 121a.
- the first cladding layer 121b may be disposed to cover the top and side surfaces of the first conductive layer 121a.
- the first conductive layer 121a may have a greater thickness than the first cladding layer 121b.
- the first clad layer 121b is made of a material that is more resistant to corrosion than the first conductive layer 121a, and when manufacturing the display device 100, the first conductive layer 121a of the first assembly line 121 and the second assembly line ( Short circuit defects due to migration between the second conductive layers 122a of 122 can be minimized.
- the first cladding layer 121b may be made of molybdenum (Mo), molybdenum titanium (MoTi), etc., but is not limited thereto.
- the second layer VDD2 of the high potential power line VDD may be disposed on the second passivation layer 115 .
- the second layer VDD2 extends in a column direction between each of the plurality of sub-pixels SP and may overlap the first layer VDD1.
- the first layer VDD1 and the second layer VDD2 may be electrically connected through contact holes formed in insulating layers formed between the first layer VDD1 and the second layer VDD2.
- the second layer VDD2 may be formed of the same material and process as the first assembly line 121 , but is not limited thereto.
- connection electrode CE may be disposed in each of the plurality of sub-pixels SP.
- the connection electrode CE is a second capacitor electrode ST2 and a second transistor through a contact hole formed in the second passivation layer 115. It is electrically connected to the second source electrode SE2 of TR2.
- the connection electrode CE is an electrode for electrically connecting the light emitting element LED and the second transistor TR2 serving as a driving transistor, and includes a first connection layer CE1 and a second connection layer CE2.
- the first connection layer CE1 may be formed of the same material as the first conductive layer 121a of the first assembly line 121
- the second connection layer CE2 may be formed of the same material as the first clad layer 121a of the first assembly line 121. It may be formed of the same material on the same layer as the layer 121b.
- a third passivation layer 116 may be disposed on the second layer VDD2, the first assembly line 121, and the connection electrode CE.
- the third passivation layer 116 may be a third passivation layer ( 116)
- As an insulating layer for protecting a lower structure it may be composed of a single layer or multiple layers of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.
- the third passivation layer 116 may function as an insulating layer to prevent a short circuit defect due to migration between the first assembly line 121 and the second assembly line 122 when the display device 100 is manufactured. , This will be described later with reference to FIGS. 4A and 4B.
- a plurality of second assembly wires 122 may be disposed on the third passivation layer 116.
- Each of the plurality of second assembly wires 122 is on the same line as described above.
- the plurality of first assembly wires 121 and the plurality of second assembly wires 122 disposed in the plurality of sub-pixels SP may be spaced apart from each other.
- Each of the plurality of second assembly lines 122 may include a second conductive layer 122a and a second clad layer 122b.
- the second conductive layer 122a may be disposed on the third passivation layer 116 .
- the second clad layer 122b may be in contact with and electrically connected to the second conductive layer 122a.
- the second cladding layer 122b may be disposed to cover the top and side surfaces of the second conductive layer 122a.
- the second conductive layer 122a may have a greater thickness than the second cladding layer 122b.
- the second clad layer 122b is also made of a material that is more resistant to corrosion than the second conductive layer 122a, similar to the first clad layer 121b, and is assembled with the first assembly wiring 121 when the display device 100 is manufactured. A short circuit defect due to migration between wires 122 can be minimized.
- the second cladding layer 122b may be made of molybdenum (Mo), molybdenum titanium (MoTi), etc., but is not limited thereto.
- a second planarization layer 117 may be disposed on the plurality of second assembly wires 122.
- the second planarization layer 117 may be composed of a single layer or a multi-layer, and for example, acrylic ( acryl)-based organic material, but is not limited thereto.
- the second planarization layer 117 includes a plurality of first openings 117a in which each of the plurality of light emitting elements (LEDs) are seated and a plurality of second openings 117b exposing each of the plurality of connection electrodes CE.
- LEDs light emitting elements
- the plurality of first openings 117a may be disposed in each of the plurality of sub-pixels SP.
- one or more first openings 117a may be disposed in one sub-pixel SP.
- one first opening 117a may be disposed in one sub-pixel SP, or two first openings 117a may be disposed.
- the plurality of first openings 117a are portions into which a plurality of light emitting devices (LEDs) are inserted, and may also be referred to as pockets.
- the plurality of first openings 117a may be formed to overlap the plurality of assembly lines 120 .
- one first opening 117a may overlap the first assembly line 121 and the second assembly line 122 disposed adjacent to each other in one sub-pixel SP.
- a portion of the second clad layer 122b of the plurality of second assembly wires 122 may be exposed through the first opening 117a.
- the third passivation layer 116 covers all of the first assembly lines 121 in the first opening 117a, the first assembly line 121 overlaps the first opening 117a, but the first assembly line 121 overlaps the first opening 117a. It may not be exposed at (117a).
- a layer for forming the second assembly line 122 is deposited on the entire surface of the third passivation layer 116, and the second assembly line 122 is formed.
- a step of etching a portion of the wire 122 is included.
- the third passivation layer 116 may be damaged by the etchant in the process of etching the second assembly lines 122 .
- the insulating properties of the third passivation layer 116 may be weakened in the stepped area SA, causing damage to the first cladding layer 121b and the first conductive layer 121a. there is. Damage to the first cladding layer 121b and the first conductive layer 121a may reduce the transfer rate of the light emitting device (LED).
- the thickness of the third passivation layer 116 can be increased, but the increase in the thickness of the third passivation layer 116 in the first opening 117a weakens the electric field caused by the assembled wiring, so that the light emitting device (LED) may decrease the transfer rate of Therefore, structural improvement is required to solve this problem, and the improved structure will be described in embodiments to be described later.
- the plurality of second openings 117b may be disposed in the plurality of sub-pixels SP.
- the plurality of second openings 117b are portions exposing the connection electrode CE of each of the plurality of sub-pixels SP.
- the connection electrode CE under the second planarization layer 117 is exposed through the plurality of second openings 117b and can be electrically connected to the light emitting element LED, and the driving current from the second transistor TR2 is reduced. It can be transmitted to the light emitting element (LED).
- the third passivation layer 116 may have a contact hole in an area overlapping the second opening 117b, and the connection electrode CE may include the second planarization layer 117 and the third passivation layer 116 can be exposed from
- a plurality of light emitting devices may be disposed in the plurality of first openings 117a.
- the plurality of light emitting devices are light emitting devices (LED) that emit light by current.
- the plurality of light emitting devices may include light emitting devices (LED) emitting red light, green light, blue light, etc., and a combination thereof may implement light of various colors including white.
- the light emitting device may be a light emitting diode (LED) or a micro LED, but is not limited thereto. In this case, micro LED means that the size of the light emitting element is 100 ⁇ m or less.
- a plurality of light emitting elements LEDs are disposed in the red sub-pixel SPR, the green light emitting element 130 disposed in the green sub-pixel SPG, and the blue sub-pixel SPB. It will be described assuming that it includes the blue light emitting device 150.
- the plurality of light emitting elements (LEDs) are made of light emitting elements (LEDs) emitting light of the same color, and a separate light conversion member that converts light from the plurality of light emitting elements (LEDs) into light of a different color is used.
- images of various colors may be displayed, but the present invention is not limited thereto.
- the plurality of light emitting devices LEDs include a red light emitting device 130 disposed on a red sub-pixel SPR, a green light emitting device 140 disposed on a green sub-pixel SPG, and a blue light emitting device 140 disposed on a blue sub-pixel SPB.
- a light emitting device 150 may be included.
- Each of the red light emitting device 130, the green light emitting device 140, and the blue light emitting device 150 may include a first semiconductor layer, a second semiconductor layer, a first electrode, and a second electrode in common.
- the red light emitting device 130 includes a light emitting layer emitting red light
- the green light emitting device 140 includes a light emitting layer emitting green light
- the blue light emitting device 150 includes a light emitting layer emitting blue light. can do.
- the second semiconductor layer 133 may be disposed on the first semiconductor layer 131 .
- the first semiconductor layer 131 and the second semiconductor layer 133 may be layers formed by doping a specific material with n-type and p-type impurities.
- the first semiconductor layer 131 and the second semiconductor layer 133 may include an AlInGaP-based semiconductor layer, for example, a p-p material such as indium aluminum phosphide (InAlP) or gallium arsenide (GaAs). It may be a layer doped with n-type or n-type impurities.
- the p-type impurity may be magnesium (Mg), zinc (Zn), or beryllium (Be), and the n-type impurity may be silicon (Si), germanium (Ge), or tin (Sn), but is not limited thereto. don't
- the light emitting layer 132 emitting red light may be disposed between the first semiconductor layer 131 and the second semiconductor layer 133 .
- the light emitting layer 132 may emit light by receiving holes and electrons from the first semiconductor layer 131 and the second semiconductor layer 133 .
- the light emitting layer 132 may have a single-layer or multi-quantum well (MQW) structure.
- the light emitting layer 132 may convert injected electric energy into light having a specific wavelength within a range of about 570 nm to about 630 nm.
- the change of a specific wavelength is influenced by the size of the band gap of the light emitting diode.
- the size of the band gap can be adjusted by changing the composition ratio of Al and Ga. For example, as the composition ratio of Al increases, the wavelength becomes shorter.
- the first electrode 134 may be disposed on the lower surface of the first semiconductor layer 131
- the second electrode 135 may be disposed on the upper surface of the second semiconductor layer 133 .
- the first electrode 134 is an electrode bonded to the second assembled wiring 122 exposed through the first opening 117a
- the second electrode 135 is a pixel electrode PE and a second semiconductor layer 133 which will be described later.
- ) is an electrode that electrically connects
- the first electrode 134 and the second electrode 135 may be formed of a conductive material.
- the first electrode 134 may be formed of a eutectic metal in order to bond the first electrode 134 onto the second assembly wire 122 .
- the first electrode 134 may include tin (Sn), indium (In), zinc (Zn), lead (Pb), nickel (Ni), gold (Au), platinum (Pt), or copper (Cu). etc., but is not limited thereto.
- both the green light emitting device 140 and the blue light emitting device 150 may have the same or similar structure as the red light emitting device 130 .
- the green light emitting device 140 may include a first electrode, a first semiconductor layer on the first electrode, a green light emitting layer on the first semiconductor layer, a second semiconductor layer on the green light emitting layer, and a second electrode on the second semiconductor layer.
- the blue light emitting device may also include a structure in which a first electrode, a first semiconductor layer, a blue light emitting layer, a second semiconductor layer, and a second electrode are sequentially stacked.
- the green light emitting device 140 and the blue light emitting device 150 may be formed of a compound selected from the group consisting of GaN, AlGaN, InGaN, AlInGaN, GaP, AlN, GaAs, AlGaAs, InP, and mixtures thereof. It is not limited to this.
- an insulating layer surrounding a portion of each of the plurality of light emitting elements may be disposed.
- the insulating layer may cover at least one side surface of the plurality of light emitting devices (LED) of the outer surface of the plurality of light emitting devices (LED).
- An insulating layer is formed on the light emitting element (LED) to protect the light emitting element (LED), and when the first electrode 134 and the second electrode 135 are formed, the first semiconductor layer 131 and the second semiconductor layer 133 of electrical shorts can be prevented.
- a third planarization layer 118 may be disposed on the plurality of light emitting devices (LEDs).
- the third planarization layer 118 may planarize an upper portion of the substrate 110 on which the plurality of light emitting devices (LEDs) are disposed, and the plurality of light emitting devices (LEDs) are formed by the third planarization layer 118 through the first opening ( 117a) can be stably fixed.
- the third planarization layer 118 may be composed of a single layer or a multi-layer, and may be made of, for example, an acryl-based organic material, but is not limited thereto.
- the pixel electrode PE may be disposed on the third planarization layer 118 .
- the pixel electrode PE is an electrode for electrically connecting the plurality of light emitting elements LED and the connection electrode CE.
- the pixel electrode PE may be electrically connected to the light emitting device LED of the first opening 117a and the connection electrode CE of the second opening 117b through a contact hole formed in the third planarization layer 118 .
- the second electrode 135 of the light emitting element LED, the connection electrode CE, and the second transistor TR2 may be electrically connected through the pixel electrode PE.
- the third layer VDD3 of the high potential power line VDD may be disposed on the third planarization layer 118 .
- the third layer VDD3 may electrically connect the first layer VDD1 and the second layer VDD2 disposed in different columns.
- the third layer VDD3 extends between the plurality of sub-pixels SP in a row direction, and electrically connects the plurality of second layers VDD2 of the high potential power line VDD extending in the column direction to each other. can be connected to
- the plurality of high-potential power lines VDD are connected in a mesh form through the third layer VDD3, there is a technical effect of reducing a voltage drop phenomenon.
- the black matrix BM may be disposed on the third planarization layer 118 .
- the black matrix BM may be disposed between the plurality of sub-pixels SP on the third planarization layer 118 .
- the black matrix BM can reduce color mixing between a plurality of sub-pixels SP.
- the black matrix BM may be made of an opaque material, for example, black resin, but is not limited thereto.
- the protective layer 119 may be disposed on the pixel electrode PE, the third planarization layer 118, and the black matrix BM.
- the protective layer 119 is a layer for protecting components under the protective layer 119, and may be composed of a single layer or multiple layers of light transmitting epoxy, silicon oxide (SiOx), or silicon nitride (SiNx), but is not limited thereto. .
- the plurality of first assembled wires 121 are spaced apart from the plurality of light emitting elements LEDs, and only the plurality of second assembled wires 122 are in contact with the plurality of light emitting elements LEDs. can This is to prevent defects caused by the plurality of light emitting elements (LEDs) contacting both the plurality of first assembly wires 121 and the plurality of second assembly wires 122 during the manufacturing process of the display device 100.
- a third passivation layer 116 may be formed on the first assembly lines 121 of the first assembly line 121 , and the plurality of light emitting devices (LEDs) may be contacted only to the plurality of second assembly lines 122 .
- 4A and 4B are process diagrams for explaining a method of manufacturing a display device according to an embodiment, and are process diagrams for explaining a process of self-assembling a plurality of light emitting devices (LEDs) in a first opening 117a.
- LEDs light emitting devices
- a light emitting device is inserted into a chamber (CB) filled with a fluid (WT).
- the fluid WT may include water or the like, and the chamber CB filled with the fluid WT may have an open top.
- the mother substrate 10 may be placed on the chamber CB filled with the light emitting device LED.
- the mother substrate 10 is a substrate composed of a plurality of substrates 110 constituting the display device 100, and when a plurality of light emitting devices (LEDs) are self-assembled, a plurality of assembly wires 120 and a second planarization layer 117 ) can be used.
- LEDs light emitting devices
- the mother substrate 10 formed with the first and second assembly lines 121 and 122 and the second planarization layer 117 is placed on the chamber CB or inserted into the chamber CB.
- the mother substrate 10 may be positioned so that the first opening 117a of the second planarization layer 117 and the fluid WT face each other.
- a magnet MG may be placed on the mother substrate 10 .
- the light emitting devices LEDs sinking or floating on the bottom of the chamber CB may move toward the mother substrate 10 by the magnetic force of the magnet MG.
- the light emitting element LED may include a magnetic material to move by a magnetic field.
- the first electrode 134 or the second electrode 135 of the light emitting device (LED) may include a ferromagnetic material such as iron, cobalt, or nickel.
- the light emitting element (LED) moved toward the second planarization layer 117 by the magnet MG is generated through the first opening ( 117a) can be self-assembled.
- An AC voltage may be applied to the plurality of first assembled wires 121 and the plurality of second assembled wires 122 to form an electric field.
- the light emitting element LED may be dielectrically polarized by such an electric field to have a polarity. Further, the dielectric polarized light emitting device (LED) may be moved or fixed in a specific direction by dielectrophoresis (DEP), that is, an electric field. Accordingly, the plurality of light emitting devices (LEDs) may be fixed in the first opening 117a of the second planarization layer 117 using dielectrophoresis.
- the mother board 10 is 180 ° Reversible.
- the mother substrate 10 may be turned over in a state in which voltage is applied to the plurality of first assembly wires 121 and the plurality of second assembly wires 122 , and subsequent processes may be performed.
- the first electrode 134 of the light emitting element LED In a state where the first electrode 134 of the light emitting element LED is positioned on the second assembly line 122, heat and pressure are applied to the light emitting element LED to form the light emitting element LED on the second assembly line 122. can be bonded to
- the first electrode 134 of the light emitting element LED may be bonded to the second assembly line 122 through eutectic bonding.
- Eutectic bonding is a bonding method by thermal compression at high temperature, and is one of the bonding processes that is very robust and highly reliable.
- the eutectic bonding method not only realizes high bonding strength, but also has an advantage of not needing to apply a separate adhesive material from the outside.
- bonding methods of the plurality of light emitting devices (LEDs) may be configured in various ways other than eutectic bonding, but are not limited thereto.
- the plurality of first assembly lines 121 and the plurality of second assembly wires 122 when the display device 100 is manufactured, but the same voltage may be applied when the display device 100 is driven.
- the plurality of first assembly wires 121 and the plurality of second assembly wires 122 may be connected to different assembly pads, and different voltages may be applied thereto.
- an AC voltage may be applied to the plurality of assembled wires 120 through the plurality of assembly pads to form an electric field.
- the plurality of light emitting devices (LEDs) may be easily self-assembled into the first opening 117a of the second planarization layer 117 .
- the plurality of light emitting devices LED
- the plurality of assembly wires 120 disposed in the plurality of red sub-pixels (SPR) and the plurality of green sub-pixels (SPG) The plurality of assembly wires 120 disposed on the spherical surface and the plurality of assembly wires 120 disposed on the plurality of blue sub-pixels SPB may be connected to different assembly pads.
- the light emitting element LED may be selectively self-assembled only in a specific sub-pixel SP among the plurality of sub-pixels SP through a plurality of assembly pads.
- the self-assembled mother board 10 may be separated into a plurality of boards 110 by scribing. Thereafter, the plurality of first assembling wires 121 and the plurality of second assembling wires 121 are connected through a link wire connecting the plurality of first assembly wires 121 into one and a link wire connecting the plurality of second assembly wires 122 into one. The same voltage can be easily applied to the wiring 122 .
- the display device 100 In the display device 100 according to the embodiment, at least a portion of the plurality of assembly wires 120 for self-assembly of the plurality of light emitting elements (LEDs) is used as a wire for applying a low potential power supply voltage to the plurality of light emitting elements (LEDs).
- LEDs light emitting devices floating in the fluid
- WT may be moved adjacent to the mother substrate 10 using a magnetic field.
- the plurality of assembled wires 120 may be used as wires for supplying a low potential voltage to the plurality of light emitting elements (LEDs).
- the plurality of assembly wires 120 may be used not only for self-assembly of the plurality of light emitting elements (LEDs) but also as wires for driving the plurality of light emitting elements (LEDs).
- the plurality of assembled wires 120 include a cladding layer, corrosion of the plurality of assembled wires 120 or short-circuit defects may be reduced.
- the plurality of first assembling wires 121 are composed of a first conductive layer 121a and a first clad layer 121b surrounding the first conductive layer 121a and more resistant to corrosion than the first conductive layer 121a.
- the second assembling wiring 122 of is composed of a second conductive layer 122a and a second clad layer 122b surrounding the second conductive layer 122a and being more resistant to corrosion than the second conductive layer 122a.
- the plurality of light emitting devices (LEDs) may be self-assembled by placing the mother substrate 10 on which the plurality of assembly lines 120 are formed in the fluid WT.
- the assembled wiring 120 may be corroded, and thus a short circuit may occur. Therefore, the first conductive layer 121a of the plurality of first assembly wires 121 can be covered with the second passivation layer 115 and the first cladding layer 121b, and the plurality of second assembly wires 122 The second conductive layer 122a may be covered with the third passivation layer 116 and the second cladding layer 122b. Accordingly, since the plurality of assembly lines 120 are formed in a structure including the first cladding layer 121b and the second cladding layer 122b, reliability of the plurality of assembly lines 120 may be improved.
- FIG. 5 is a cross-sectional view of a display device according to a second embodiment.
- the display device 500 of FIG. 5 has a different third passivation layer 516 compared to the display device 100 of FIGS. 1 to 3, and this feature will be mainly described.
- the first conductive layer 121a of the first assembly line 121 and the second conductive layer 522a of the second assembly line 122 overlap the second planarization layer 117 .
- the second planarization layer 117 may cover both the first conductive layer 121a of the first assembly line 121 and the first conductive layer 522a of the second assembly line 522, and the first conductive layer ( 121a) and the second conductive layer 522a may be spaced apart from the first opening 117a.
- the first clad layer 121b of the first assembled wiring 121 may be disposed between the first conductive layer 121a and the second planarization layer 117 to cover the first conductive layer 121a.
- the first cladding layer 121b extends toward the first opening 117a to form an electric field for self-assembling the light emitting device LED. can do.
- a portion of the first cladding layer 121b may overlap the second planarization layer 117 and cover the top and side surfaces of the first conductive layer 121a. The remaining portion of the first cladding layer 121b may extend into the first opening 117a and overlap the light emitting device LED. However, since the third passivation layer 516 is disposed on the first cladding layer 121b, the first cladding layer 121b does not contact the first electrode 134 of the light emitting device (LED).
- the second clad layer 522b of the plurality of second assembled wires 522 may be disposed between the second conductive layer 522a and the second planarization layer 117 to cover the second conductive layer 522a.
- the second cladding layer 522b extends toward the first opening 117a instead of the second conductive layer 522a that does not overlap the first opening 117a, and together with the first cladding layer 121b, the light emitting element (LED) ) can form an electric field for self-assembly.
- a portion of the second clad layer 522b may overlap the second planarization layer 117 and cover the top and side surfaces of the second conductive layer 522a.
- the remaining portion of the second cladding layer 522b may extend into the first opening 117a and overlap the light emitting device LED.
- the second cladding layer 522b since the second cladding layer 522b is disposed on the third passivation layer 516, the second cladding layer 522b and the first electrodes 134 of the plurality of light emitting devices (LEDs) may contact each other, , A low-potential power supply voltage from the second assembled wire 522 may be supplied to the light emitting device LED.
- the third The thickness of the passivation layer 516 may be increased. Even if the third passivation layer 516 having an increased thickness is etched to some extent by the etchant of the second conductive layer 522a and the second cladding layer 522b, the first conductive layer 121a and the second passivation layer 516 in the stepped region SA 1 There is a technical effect of maintaining insulating properties from the cladding layer 121b.
- the third passivation layer 516 having an increased thickness in order to maintain assembly characteristics of the light emitting device LED may be additionally etched in the first opening 117a.
- the third passivation layer 516 may have a first thickness D1 in an area within the first opening 117a and a second thickness D2 in an area other than the first opening 117a.
- the first thickness D1 of the third passivation layer 516 is different from the second thickness D2 , and the first thickness D1 may be smaller than the second thickness D2 .
- the second thickness D2 of the third passivation layer 516 may be twice or more than the first thickness D1.
- the insulating properties of the third passivation layer 516 are destroyed and the first conductive layer 121a and the first cladding layer 121b are destroyed. ) has a technical effect that can prevent damage.
- the plurality of first assembled wires 121 include a first conductive layer 121a and a first cladding layer 121b that is more resistant to corrosion than the first conductive layer 121a
- the plurality of second assembled wires 522 may include a second conductive layer 522a and a second cladding layer 522b that is more resistant to corrosion than the second conductive layer 522a.
- the first cladding layer 121b, the second cladding layer 522b, and the second planarization layer 117 are formed to cover the first conductive layer 121a and the second conductive layer 522a, which are relatively weak against corrosion.
- the first conductive layer 121a and the second conductive layer 522a may not be exposed to the fluid WT.
- the first cladding layer 121b and the second cladding layer 522b are directed toward the inside of the first opening 117a. By extending, an electric field that induces self-assembly of the light emitting device (LED) may be formed.
- the first electrode 134 of the light emitting device is bonded on the second clad layer 522b extending inside the first opening 117a to form a second assembly line 522 and
- the light emitting element LED may be electrically connected. Therefore, in the display device 500 according to the second embodiment, only the first cladding layer 121b and the second cladding layer 522b of each of the plurality of assembled wires 520 are disposed in the first opening 117a, There is a technical effect of reducing corrosion and short circuit defects of the assembled wiring 520 .
- the bonding process of the plurality of light emitting devices (LEDs) is facilitated by the low level difference between the first cladding layer 121b and the second cladding layer 522b in the first opening 117a.
- LEDs light emitting devices
- the first cladding layer 121b and the second cladding layer 522b of the plurality of assembled wires 520 may be disposed in the first opening 117a where the plurality of light emitting elements (LEDs) are seated.
- the first cladding layer 121b and the second cladding layer 522b have a smaller thickness than the first conductive layer 121a and the second conductive layer 522a.
- the distance between the plurality of light emitting devices (LEDs) and the first cladding layer 121b, that is, on the first cladding layer 121b It is possible to minimize the case where a plurality of light emitting elements (LEDs) are disposed in an unstable state floating on an empty space, and to stably bond the plurality of light emitting elements (LEDs) on the second cladding layer 522b. There is a technical effect.
- FIG. 6 is a cross-sectional view of a display device according to a third embodiment.
- the third embodiment may adopt features of the second embodiment.
- the first assembly line 121 is disposed between the second passivation layer 115 and the third passivation layer 616 in the first conductive layer 121a, and the first cladding layer 121b It may be disposed between the first conductive layer 121a and the third passivation layer 616 .
- a portion of the first clad layer 121b is in contact with the upper surface of the first assembly line 121 and may overlap the second planarization layer 117 .
- the remaining portion of the first cladding layer 121b may extend into the first opening 117a and overlap the light emitting device LED.
- the second conductive layer 622a of the second assembled wiring 622 may be disposed on the third passivation layer 616 and the second cladding layer 622b may be disposed on the second conductive layer 622a.
- a portion of the second clad layer 622b may overlap the second conductive layer 622a and the second planarization layer 117 at the same time.
- the remaining portion of the second clad layer 622b may extend inside the first opening 117a and be electrically connected to the light emitting element LED. That is, the first electrodes 134 of the plurality of light emitting devices (LEDs) may be electrically connected only to the second cladding layer 622b.
- the first assembled wiring 121 and the third passivation layer 616 are formed.
- a fourth passivation layer 615 may be disposed therebetween.
- the fourth passivation layer 615 covers the step area SA with a periphery of the first opening 117a and may be disposed in a minimum area.
- the fourth passivation layer 615 may be disposed to cover the first cladding layer 122b and overlap the first opening 117a and the second conductive layer 622a.
- the fourth passivation layer 615 may have better insulation characteristics and step cover characteristics than the third passivation layer 615 .
- the third passivation layer 615 is silicon oxide (SiOx)
- the fourth passivation layer 615 may be silicon nitride (SiNx), but is not limited thereto.
- the disposition area of the fourth passivation layer 615 is not limited to the above-mentioned area, and may be disposed to cover the stepped area SA and the first conductive layer 121a.
- a third passivation layer 615 may be disposed on the fourth passivation layer 615 .
- the third passivation layer 616 may be a layer having an increased thickness including a first thickness D1 and a second thickness D2, but is not limited thereto, and as shown in FIG. It may be the third passivation layer 616 implemented with only 1 thickness D1.
- the fourth passivation layer 615 is disposed to cover the periphery of the first opening 117a and the stepped area SA, thereby forming the first cladding layer 121b and the first conductive layer 615 . Damage to the layer 121a may be prevented and assembly characteristics of the light emitting device 130 may be maintained.
- FIG. 7 is a cross-sectional view of a display device according to a fourth embodiment.
- the fourth embodiment may employ features of the second and third embodiments.
- the first conductive layer 121a of the first assembled wiring 121 is disposed on the second passivation layer 115, and the first clad layer 121b covers the first conductive layer 121a. ) can be placed.
- the first cladding layer 121b covers the top and side surfaces of the first conductive layer 121a, extends into the first opening 117a of the second planarization layer 117, and overlaps the light emitting device LED. there is.
- a portion of the first clad layer 121b may contact the upper surface of the first assembly line 121 and overlap the second planarization layer 117 .
- the remaining portion of the first cladding layer 121b may extend into the first opening 117a and overlap the light emitting device LED.
- the second conductive layer 722a of the second assembled wire 722 may be disposed on the third passivation layer 716 , and the third cladding layer 722c may be disposed below the third passivation layer 716 .
- the third passivation layer 716 may be disposed between the third cladding layer 722c and the second conductive layer 722a.
- the third cladding layer 722c may be disposed below the second conductive layer 722a and electrically connected to the second conductive layer 722a through a contact hole formed in the third passivation layer 716 .
- a portion of the third clad layer 722c may overlap the second conductive layer 722a and the second planarization layer 117 at the same time.
- the remaining portion of the third cladding layer 722c may extend inside the first opening 117a and be electrically connected to the light emitting device LED.
- the third clad layer 722c may be formed by the same process as the first clad layer 121b and made of the same material on the same plane. Accordingly, process deviation between the third clad layer 722c and the first clad layer 121b may be reduced.
- the third passivation layer 716 is disposed on the first cladding layer 121b and the third cladding layer 722c, the second conductive layer 722a is disposed on the third passivation layer 716, and the second conductive layer 722a is disposed on the third passivation layer 716.
- a second clad layer 722b may be disposed to cover the layer 722a.
- the third passivation layer 716 is formed to a thickness sufficient to maintain the insulating properties of the stepped region SA, so that when the second conductive layer 722a is patterned on the third passivation layer 716, the first assembly line ( 121) can be prevented from occurring. Subsequently, after patterning the second conductive layer 722a, an etching process for reducing the thickness of the third passivation layer 716 is performed in the first opening 117a region.
- the third passivation layer 716 may have a first thickness D1 in an area within the first opening 117a and a second thickness D2 in an area other than the first opening 117a.
- the first thickness D1 of the third passivation layer 716 is different from the second thickness D2 , and the first thickness D1 may be smaller than the second thickness D2 .
- the second thickness D2 of the third passivation layer 716 may be twice or more than the first thickness D1.
- the third passivation layer 716 having a reduced thickness in the area of the first opening 117a improves the assembly rate during the assembly process of the light emitting device (LED) through the first assembly line 121 and the second assembly line 722. There are technical effects that can be made.
- the light emitting device is shown as floating from the third passivation layer 716 without contacting the third passivation layer 716, but substantially the third passivation layer 716 Since the thickness is very thin compared to the size of the light emitting device (LED), the light emitting device (LED) can contact the third passivation layer 716 .
- the display device 700 by increasing the thickness of the third passivation layer 716, the insulating properties of the third passivation layer 716 are destroyed and the first conductive layer 121a and the first cladding layer 121b are destroyed. ) to prevent damage.
- process deviation is reduced by forming the third cladding layer 722c on the same plane in the same process as the first cladding layer 121b, and the electric field is improved by using it as an end of a field forming electrode when assembling a light emitting device (LED).
- LED light emitting device
- a second clad layer 722b covering the second conductive layer 722a may be disposed on the second conductive layer 722a.
- the second cladding layer 722b may cover the top and side surfaces of the second conductive layer 722a.
- a second planarization layer 117 covering the second cladding layer 722b and the third passivation layer 716 may be disposed.
- the second planarization layer 117 may be disposed to cover at least a portion of the second clad layer 722b.
- a portion of the second clad layer 722b may be exposed in the first opening 117a of the second planarization layer 117 .
- the first cladding layer 121b, the second cladding layer 722b, and the third cladding layer 722c are formed. It extends into the first opening 117a to form an electric field that induces self-assembly of the light emitting devices LED.
- the first electrode 134 of the light emitting device (LED) is bonded on the second clad layer 522b extending inside the first opening 117a to form a second assembly line 722 and The light emitting element LED may be electrically connected.
- the display device 700 according to the fourth embodiment, only the first cladding layer 121b, the second cladding layer 722b, and the third cladding layer 722c of each of the plurality of assembled wires 720 are first Disposing in the opening 117a has a technical effect of reducing corrosion and short circuit defects of the plurality of assembled wires 720 .
- FIG. 8 is a cross-sectional view of a display device according to a fifth embodiment.
- the fifth embodiment can adopt features of the second to fourth embodiments.
- the first conductive layer 121a of the first assembled wiring 121 is disposed on the second passivation layer 115, and the first clad layer 121b covers the first conductive layer 121a. ) can be placed.
- the first cladding layer 121b covers the top and side surfaces of the first conductive layer 121a, extends into the third opening 127a of the fourth planarization layer 127, and overlaps the light emitting device LED. there is.
- a portion of the first clad layer 121b may contact the upper surface of the first assembly line 121 and overlap the second planarization layer 117 .
- the remaining portion of the first cladding layer 121b may extend into the third opening 127a and overlap the light emitting device LED.
- the second conductive layer 822a of the second assembled wiring 722 may be disposed on the third passivation layer 816 , and the third cladding layer 822c may be disposed below the third passivation layer 816 .
- a third passivation layer 816 may be disposed between the third cladding layer 822c and the second conductive layer 822a.
- the third cladding layer 822c may be disposed below the second conductive layer 822a and electrically connected to the second conductive layer 822a through a contact hole formed in the third passivation layer 816 .
- a portion of the third cladding layer 822c may overlap the second conductive layer 822a and simultaneously overlap the second planarization layer 117 and the fourth planarization layer 127 .
- the remaining portion of the third cladding layer 822c may extend into the third opening 127a and be electrically connected to the light emitting element LED.
- the third clad layer 822c may be formed by the same process as the first clad layer 121b and made of the same material on the same plane. Accordingly, process deviation between the third clad layer 822c and the first clad layer 121b may be reduced.
- the third passivation layer 816 is disposed on the first cladding layer 121b and the third cladding layer 822c, the second conductive layer 822a is disposed on the third passivation layer 816, and the second A second clad layer 822b may be disposed to cover the conductive layer 822a.
- the display device 800 may include a reflective layer 850 disposed on a side surface of the second flattening layer 117 exposing an area where the light emitting device (LED) is to be disposed. Since the reflective layer 850 is formed of a metal material capable of reflecting light generated from the light emitting device (LED), the reflective layer 850 can float without being shorted with the second cladding layer 822b, so that the second cladding layer 822b can float. ) may include an opening. A reflective layer 850 may be disposed in the opening of the second cladding layer 822b to contact the third passivation layer 816 .
- the reflective layer 850 may include aluminum (Al), but is not limited thereto.
- the opening of the second clad layer 822b may separate the second clad layer 822b into two parts.
- Contact holes are formed in the third passivation layer 816 to electrically connect the two divided second cladding layers 822b, and the two second cladding layers are spaced apart through the contact holes of the third passivation layer 816.
- 822b may be connected to the third cladding layer 822c, respectively.
- the contact holes formed in the third passivation layer 816 are formed around the opening of the second cladding layer 822b and do not overlap the reflective layer 850 .
- the second clad layer 822b overlapping the second planarization layer 117 is connected to the third clad layer 822c through one contact hole of the third passivation layer 816, and the third clad layer 822c is It may be connected to the second clad layer 822b overlapping the opening of the second planarization layer 117 through another contact hole of the third passivation layer 816 .
- the third cladding layer 822c may not be connected to the second conductive layer 822a through the contact hole of the third passivation layer 816 .
- the third cladding layer 822c may not extend to the third opening 127a.
- the third passivation layer 816 is formed to a thickness sufficient to maintain the insulating properties of the stepped region SA, so that when the second conductive layer 822a is patterned on the third passivation layer 816, the first assembly line ( 121) to avoid damage. After patterning the second conductive layer 822a, an etching process is performed to reduce the thickness of the third passivation layer 816 in the third opening 127a.
- the third passivation layer 816 may have a first thickness D1 in an area within the third opening 127a and a second thickness D2 in an area other than the third opening 127a.
- the first thickness D1 of the third passivation layer 816 is different from the second thickness D2 , and the first thickness D1 may be smaller than the second thickness D2 .
- the second thickness D2 of the third passivation layer 816 may be twice or more than the first thickness D1.
- the third passivation layer 816 having a reduced thickness in the area of the third opening 127a improves the assembly rate during the assembly process of the light emitting device (LED) through the first assembly line 121 and the second assembly line 822. There are technical effects that can be made.
- the light emitting device As mentioned in FIG. 7, although the light emitting device (LED) is shown as floating from the third passivation layer 816 without contacting the third passivation layer 816 in FIG. 8, it is substantially Since the thickness of the third passivation layer 816 is very thin compared to the size of the light emitting element LED, the light emitting element LED may contact the third passivation layer 816 .
- the second planarization layer 117 may be disposed on the second cladding layer 822b having an opening and the third passivation layer 816 .
- the second planarization layer 117 overlaps the first conductive layer 121a and the second conductive layer 822a and overlaps a portion of the first cladding layer 121b and a portion of the second cladding layer 822b.
- the device (LED) arrangement area has an opening so that it can be exposed.
- a reflective layer 850 may be disposed on a side surface of the second planarization layer 117 around the opening of the second planarization layer 117 .
- the first reflective layer 850a may contact the third passivation layer 816
- the second reflective layer 850b may contact the third passivation layer 816 through the opening of the second cladding layer 822b.
- the first reflective layer 850a and the second reflective layer 850b may be connected to each other and disposed to surround the opening of the second planarization layer 117 .
- a fourth planarization layer 127 may be disposed on the reflective layer 850 and the second planarization layer 117 to protect the reflective layer 850 .
- the fourth planarization layer 127 includes a third opening 127a exposing the second cladding layer 822b in the LED disposition area.
- the fourth planarization layer 127 may be made of an acryl-based organic material, but is not limited thereto.
- the display device 800 by increasing the thickness of the third passivation layer 816, the insulating properties of the third passivation layer 816 are destroyed and the first conductive layer 121a and the first cladding layer 121b are destroyed. ) to prevent damage.
- FIG 9 is a cross-sectional view of a display device according to a sixth embodiment.
- the sixth embodiment can adopt features of the second to fifth embodiments.
- the first conductive layer 121a of the first assembly line 121 and the second conductive layer 522a of the second assembly line 522 overlap the second planarization layer 117 .
- the second planarization layer 117 may cover both the first conductive layer 121a of the first assembly line 121 and the first conductive layer 522a of the second assembly line 522, and the first conductive layer ( 121a) and the second conductive layer 522a may be spaced apart from the third opening 127a.
- the first clad layer 121b of the first assembled wiring 121 may be disposed between the first conductive layer 121a and the second planarization layer 117 to cover the first conductive layer 121a. Also, instead of the first conductive layer 121a that does not overlap the third opening 137a, the first cladding layer 121b extends toward the third opening 127a to form an electric field for self-assembling the light emitting device LED. can do.
- a portion of the first cladding layer 121b may overlap the second planarization layer 117 and cover the top and side surfaces of the first conductive layer 121a.
- the remaining portion of the first cladding layer 121b may extend into the third opening 127a and overlap the light emitting element LED.
- the third passivation layer 816 is disposed on the first cladding layer 121b, the first cladding layer 121b does not contact the first electrode 134 of the light emitting device (LED).
- the second clad layer 522b of the plurality of second assembled wires 522 may be disposed between the second conductive layer 522a and the second planarization layer 117 to cover the second conductive layer 522a.
- the second cladding layer 522b extends toward the third opening 127a instead of the second conductive layer 522a that does not overlap the third opening 127a, and together with the first cladding layer 121b, the light emitting element (LED) ) can form an electric field for self-assembly.
- a portion of the second clad layer 522b may overlap the second planarization layer 117 and cover the top and side surfaces of the second conductive layer 522a.
- the remaining portion of the second clad layer 522b may extend into the third opening 127a and overlap the light emitting device LED.
- the second cladding layer 522b since the second cladding layer 522b is disposed on the third passivation layer 816, the second cladding layer 522b and the first electrode 134 of the light emitting device (LED) may come into contact with each other and emit light.
- a low-potential power supply voltage from the second assembly wire 522 may be supplied to the device LED.
- the third passivation layer 816 is etched to some extent by the etchant of the second conductive layer 522a and the second cladding layer 522b, the first conductive layer 121a and the first cladding layer ( 121b) to a thickness sufficient to maintain insulation properties.
- the third passivation layer 516 having an increased thickness in order to maintain assembly characteristics of the light emitting device LED may be additionally etched in the third opening 127a.
- the thickness of the third passivation layer 816 is the first thickness D1 in the area within the third opening 127a and has the second thickness D2 in the area other than the third opening 127a.
- the first thickness D1 of the third passivation layer 816 is different from the second thickness D2, and the first thickness D1 is smaller than the second thickness D2.
- the second thickness D2 of the third passivation layer 816 may be twice or more than the first thickness D1.
- the display device 900 may include a reflective layer 950 disposed on a side surface of the second flattening layer 117 exposing an area where the light emitting device (LED) is to be disposed.
- the reflective layer 950 includes a first reflective layer 950a and a second reflective layer 950b, and is formed of a metal material capable of reflecting light generated from the light emitting device (LED).
- the reflective layer 950 may include aluminum (Al), but is not limited thereto.
- the first reflective layer 950a and the second reflective layer 950b are spaced apart from each other and connected to the first cladding layer 121b and the second cladding layer 522b, respectively. Specifically, the first reflective layer is connected to the first cladding layer 121b through the contact hole of the third passivation layer 816, and the second reflective layer 950b is connected on the second cladding layer 522b.
- first reflective layer 950a and the second reflective layer 950b are spaced apart from each other and connected to assembly lines, a control margin can be increased during assembly of the light emitting device (LED), thereby facilitating assembly of the light emitting device (LED). There are technical effects that can make it happen.
- the display device 900 by increasing the thickness of the third passivation layer 916, the insulating properties of the third passivation layer 916 are destroyed and the first conductive layer 121a and the first cladding layer 121b are destroyed. ) to prevent damage.
- the loss of light generated from the light emitting elements (LEDs) can be reduced by disposing the reflective layer 950 around the opening where the light emitting elements (LEDs) are disposed, and by separating the reflective layers 950 into two parts, each of which is a first assembly wire. 121 and the second assembly line 522, there is a technical effect of improving the control margin when assembling the light emitting device (LED).
- FIG. 10 is a cross-sectional view of a display device 1000 according to a seventh embodiment.
- the seventh embodiment can adopt features of the second to sixth embodiments.
- a third insulating layer 200 may be disposed on the second planarization layer 117 .
- the third insulating layer 200 may be disposed not to overlap the first opening. Since the third insulating layer 200 is disposed, the insulating layer is thickly formed in the region other than the assembly hole region, and thus, generation of DEP force in the region other than the assembly hole region can be prevented. Accordingly, as the DEP force is concentrated in the assembly hole, assembly force for the light emitting device may be improved.
- the DEP force is small in areas other than the assembly hole, and the third insulating layer 200 obstructs the path to the first opening 117a, making it difficult for a new light emitting device to approach the assembly hole area.
- FIG. 11 is a cross-sectional view of a display device 1100 according to an eighth embodiment.
- the eighth embodiment may adopt features of the second, third, sixth, and seventh embodiments.
- the main features of the eighth embodiment will be mainly described.
- the first clad layer 1021b of the first assembly line 1021 may extend from the first conductive layer 1021a toward the second assembly line 1022 .
- the second clad layer 1022b of the second assembly line may extend from the second conductive layer 1022a toward the first assembly line 1021 .
- the first cladding layer 1021b and the second cladding layer 1022b are disposed with the third passivation layer 116 interposed therebetween, so that they may overlap vertically.
- the second cladding layer 1022b may have a predetermined electrode hole 1023 in an area overlapping the light emitting device (LED) and the first cladding layer 1021b.
- a width of the electrode hole 1023 may be smaller than that of the light emitting device (LED).
- an AC voltage may be applied to the first cladding layer 1021b and the second cladding layer 1022b to form an electric field.
- the DEP force caused by the electric field may be concentrated in the electrode hole 1023 provided in the second cladding layer 1022b.
- the light emitting device LED may be self-assembled in the first opening 117a by the concentrated dielectrophoretic force (DEP force).
- DEP force concentrated dielectrophoretic force
- the assembly wires 1021 and 1022 are vertically overlapped, there is a technical effect of strengthening the assembly force for the light emitting device (LED).
- the first opening 117a does not vertically overlap the first conductive layer 1021a and the second conductive layer 1022a, the thickness of the panel can be reduced.
- the second cladding layer 1022b may be disposed below the light emitting device (LED). In addition, the second cladding layer 1022b may contact the first electrode 134 of the light emitting device (LED).
- the second cladding layer 1022b is disposed on the lower surface of the first electrode 134 of the light emitting element (LED), the light emitting element (LED) is uniformly supported and a wide electrical contact area is secured with the carrier.
- the injection efficiency is improved and the luminous efficiency is improved and the luminance is improved.
- FIG. 12 is a diagram showing the assembly wiring 1020 in detail in the display device 1100 according to the eighth embodiment.
- the first cladding layer 1021b may include a 1-1 cladding layer 1021b1 , a 1-2 cladding layer 1021b2 , and a 1-3 cladding layer 1021b3 .
- the 1-2 cladding layer 1021b2 may be a protrusion electrode extending from the 1-1 cladding layer 1021b1 toward the second cladding layer 1022b.
- the second clad layer 1022b may include a 2-1 clad layer 1022b1, a 2-2 clad layer 1022b2, and a 2-3 clad layer 1022b3.
- the 2-2 cladding layer 1022b2 may be a protruding electrode extending from the 2-1 cladding layer 1022b1 toward the first cladding layer 1021b.
- the 1-2 cladding layer 1021b2 and the 2-2 cladding layer 1022b2 may vertically overlap each other.
- the 2-2 cladding layer 1022b2 may include an electrode hole 1023 . Accordingly, the DEP force can be concentrated in the electrode hole 1023 of the second cladding layer 1022b, and the Dep force is uniformly distributed in the assembly hole 1023, thereby improving the assembly force.
- the 2-3 cladding layer 1022b3 connecting the 2-1 cladding layer 1022b1 and 2-2 cladding layer 1022b2 may be arranged to have an inclined surface. Through this, the second conductive layer 1022a is disposed in an area other than the first opening 117a, thereby having a technical effect of reducing the thickness of the panel.
- the insulating property of the insulating layer is prevented from being destroyed by increasing the thickness of the insulating layer disposed between the first assembly wiring and the second assembly wiring, and By reducing the thickness of the insulating layer disposed on the assembly wiring, there is a technical effect of facilitating self-assembly of the light emitting device through a plurality of assembly wiring.
- the embodiment has a technical effect of reducing corrosion and short circuit defects of a plurality of assembled wires.
- corrosion and short circuit defects can be reduced by disposing an insulating layer on a stepped region of a plurality of assembled wires.
- corrosion of the conductive layer can be prevented by using a cladding layer resistant to corrosion.
- the embodiment has a technical effect of stably bonding a plurality of light emitting elements by reducing a step between a plurality of assembled wires.
- the embodiment has a technical effect of reinforcing the assembly force of the light emitting device by arranging a plurality of assembly lines in a vertical symmetrical structure.
- the embodiment has a technical effect of solving the problem of the light emitting element leaning by supporting the light emitting element with one assembled wire.
- the embodiment has a technical effect of improving assembly efficiency and protecting assembled light emitting devices by forming an insulating layer thickly in an area other than the assembly hole.
- mother substrate AA display area NA: non-display area SP: sub-pixel
- Reference Numerals 110 substrate 111: buffer layer 112: gate insulating layer 113: first passivation layer
- first planarization layer 115 second passivation layer
- second planarization layer 200 third insulating layer 117a: first opening
- fourth planarization layer 127a third opening LED: light emitting element
- first electrode 135 second electrode
- VDD1 1st layer
- VDD2 2nd layer
- VDD3 3rd layer TR1: 1st transistor
- ACT1 first active layer GE1: first gate electrode SE1: first source electrode
- first drain electrode TR2 second transistor ACT2: second active layer
- TR3 Third transistor ACT3: Third active layer GE3: Third gate electrode
- CE Connection electrode CE1: First connection layer CE2: Second connection layer PE: Pixel electrode
- the embodiment may be adopted in the display field for displaying images or information.
- the embodiment may be adopted in the display field for displaying images or information using a semiconductor light emitting device.
- the embodiment may be adopted in the display field for displaying images or information using micro-level or nano-level semiconductor light emitting devices.
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims (20)
- 기판;상기 기판 상에서 교대로 배치되고, 서로 이격된 제1 조립 배선 및 제2 조립 배선;상기 제1 조립 배선 및 상기 제2 조립 배선 사이에 배치되고, 서로 다른 제1 두께 및 제2 두께를 갖는 제1 절연층;상기 제1 조립 배선 및 상기 제2 조립 배선 상에 배치되고, 제1 개구부를 갖는 평탄화층; 및상기 제1 개구부 내측에 배치되고, 제1 전극이 상기 제1 조립 배선 및 상기 제2 조립 배선에 중첩하는 발광 소자를 포함하고,상기 제1 전극은 상기 제1 조립 배선 및 상기 제2 조립 배선 중 하나에 전기적으로 연결되는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 제1 두께는 상기 제1 개구부 내의 영역에서 상기 제1 절연층의 두께이고,상기 제2 두께는 상기 제1 개구부 외의 영역에서 상기 제1 절연층의 두께이며,상기 제2 두께는 상기 제1 두께보다 두꺼운, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 제1 조립 배선은,상기 기판 상에 배치된 제1 도전층; 및상기 제1 도전층에 접하는 제1 클래드층을 포함하고,상기 제2 조립 배선은,상기 제1 절연층 상에 배치된 제2 도전층; 및상기 제2 도전층에 접하는 제2 클래드층을 포함하며,상기 제1 전극은 상기 제2 클래드층에 접하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제3항에 있어서,상기 제1 도전층 및 상기 제2 도전층은 상기 평탄화층에 중첩하고,상기 제1 클래드층 및 상기 제2 클래드층 각각은, 일부분이 상기 제1 개구부 내측에 배치된, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제4항에 있어서,상기 제2 클래드층은 상기 제1 도전층 상에서 상기 제1 도전층을 커버하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제4항에 있어서,상기 제1 절연층 아래에서 상기 제1 클래드층과 동일 평면상에 배치된 제3 클래드층을 더 포함하고,상기 제3 클래드층은 상기 제1 절연층에 포함된 컨택홀을 통해 상기 제2 도전층과 연결된, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제4항에 있어서,상기 제1 클래드층 상에 상기 제1 클래드층을 커버하는 제2 절연층을 더 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 제1 개구부에서 상기 평탄화층의 측면에 배치된 반사층을 더 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 평탄화층 상에 배치되는 제3 절연층을 더 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제1항에 있어서,상기 제1 조립 배선은 상기 제2 조립 배선과 수직으로 중첩되고,상기 제2 조립 배선은 상기 제1 조립 배선과 수직으로 중첩되는 영역에 전극 홀을 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 복수의 서브 화소가 정의된 기판;상기 복수의 서브 화소 중 동일 라인에 배치된 복수의 서브 화소를 따라 배치된 제1 조립 배선;상기 복수의 서브 화소 중 동일 라인에 배치된 복수의 서브 화소를 따라 배치되고, 상기 제1 조립 배선 각각과 이웃하게 배치된 제2 조립 배선;상기 제1 조립 배선 및 상기 제2 조립 배선과 중첩하는 제1 개구부를 포함하는 평탄화층;상기 제1 조립 배선 상에서 복수의 두께를 갖는 제1 절연층; 및상기 복수의 서브 화소 각각에서 상기 제1 개구부에 배치되고,상기 제2 조립 배선과 전기적으로 연결되는 발광 소자를 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제11항에 있어서,상기 제1 절연층은,상기 제1 개구부와 중첩하는 영역에서 제1 두께를 갖고,상기 제1 개구부와 중첩하지 않는 영역에서 제2 두께를 가지며,상기 제2 두께는 상기 제1 두께보다 두꺼운, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제11항에 있어서,상기 제2 조립 배선은 상기 제1 절연층 상에 배치된, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제11항에 있어서,상기 제1 조립 배선은,제1 도전층; 및상기 제1 도전층과 전기적으로 연결된 제1 클래드층을 포함하고,상기 제2 조립 배선은,제2 도전층; 및상기 제2 도전층과 전기적으로 연결된 제2 클래드층을 포함하며,상기 제1 도전층과 상기 제1 클래드층은 서로 다른 물질로 이루어지고,상기 제2 도전층과 상기 제2 클래드층은 서로 다른 물질로 이루어진, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제14항에 있어서,상기 제1 클래드층 및 상기 제2 클래드층은 모두 상기 제2 개구부 내측으로 연장된, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제11항에 있어서,상기 제1 도전층의 두께로 인해 상기 제1 도전층과 상기 제1 클래드층은 단차 영역을 포함하고,상기 제1 조립 배선 상에 배치되고 상기 단차 영역과 중첩하는 제2 절연층을 더 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제16항에 있어서,상기 제2 절연층은 상기 제1 개구부에 배치된, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제16항에 있어서,상기 제2 절연층은 상기 제1 조립 배선과 중첩하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제11항에 있어서,상기 평탄화층 상에 배치되는 제3 절연층을 더 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
- 제11항에 있어서,상기 제1 조립 배선은 상기 제2 조립 배선과 수직으로 중첩되고,상기 제2 조립 배선은 상기 제1 조립 배선과 수직으로 중첩되는 영역에 전극 홀을 포함하는, 반도체 발광 소자를 포함하는 디스플레이 장치.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020237044394A KR102802249B1 (ko) | 2021-06-30 | 2022-06-24 | 반도체 발광소자를 포함하는 디스플레이 장치 |
| EP22833522.0A EP4365950A4 (en) | 2021-06-30 | 2022-06-24 | DISPLAY DEVICE COMPRISING A SEMICONDUCTOR LIGHT-EMITTING ELEMENT |
| US18/575,361 US20240304774A1 (en) | 2021-06-30 | 2022-06-24 | Display device comprising semiconductor light-emitting element |
| CN202280046312.9A CN117716497A (zh) | 2021-06-30 | 2022-06-24 | 包括半导体发光器件的显示装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2021-0085627 | 2021-06-30 | ||
| KR20210085627 | 2021-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023277466A1 true WO2023277466A1 (ko) | 2023-01-05 |
Family
ID=84691940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2022/009066 Ceased WO2023277466A1 (ko) | 2021-06-30 | 2022-06-24 | 반도체 발광소자를 포함하는 디스플레이 장치 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240304774A1 (ko) |
| EP (1) | EP4365950A4 (ko) |
| KR (1) | KR102802249B1 (ko) |
| CN (1) | CN117716497A (ko) |
| WO (1) | WO2023277466A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4514098A1 (en) * | 2023-08-24 | 2025-02-26 | LG Electronics Inc. | A display device including a semiconductor light emitting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180190672A1 (en) * | 2017-01-03 | 2018-07-05 | Innolux Corporation | Display device |
| KR101987196B1 (ko) * | 2016-06-14 | 2019-06-11 | 삼성디스플레이 주식회사 | 픽셀 구조체, 픽셀 구조체를 포함하는 표시장치 및 그 제조 방법 |
| KR20200006651A (ko) * | 2018-07-10 | 2020-01-21 | 삼성디스플레이 주식회사 | 발광 장치 및 이를 구비한 표시 장치 |
| KR20200026845A (ko) * | 2020-02-20 | 2020-03-11 | 엘지전자 주식회사 | 반도체 발광소자를 이용한 디스플레이 장치 |
| KR102173349B1 (ko) * | 2019-06-28 | 2020-11-03 | 엘지전자 주식회사 | 디스플레이 장치 제조를 위한 기판 및 디스플레이 장치의 제조방법 |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010055070A (ja) * | 2008-07-30 | 2010-03-11 | Sumitomo Chemical Co Ltd | 表示装置および表示装置の製造方法 |
| US9825202B2 (en) * | 2014-10-31 | 2017-11-21 | eLux, Inc. | Display with surface mount emissive elements |
| KR102608419B1 (ko) * | 2016-07-12 | 2023-12-01 | 삼성디스플레이 주식회사 | 표시장치 및 표시장치의 제조방법 |
| KR102631259B1 (ko) * | 2016-09-22 | 2024-01-31 | 삼성디스플레이 주식회사 | 디스플레이 장치 |
| US10437402B1 (en) * | 2018-03-27 | 2019-10-08 | Shaoher Pan | Integrated light-emitting pixel arrays based devices by bonding |
| KR102579915B1 (ko) * | 2018-11-22 | 2023-09-18 | 삼성디스플레이 주식회사 | 표시 장치 및 그것의 제조 방법 |
| KR102668637B1 (ko) * | 2018-11-26 | 2024-05-27 | 삼성디스플레이 주식회사 | 표시 장치 |
| KR102734571B1 (ko) * | 2018-11-30 | 2024-11-28 | 삼성디스플레이 주식회사 | 표시 장치 및 그의 제조 방법 |
| KR102718772B1 (ko) * | 2018-12-26 | 2024-10-16 | 엘지디스플레이 주식회사 | 표시 장치 |
| EP3998644A4 (en) * | 2019-07-10 | 2023-08-09 | Nichia Corporation | METHOD OF MANUFACTURE OF IMAGE DISPLAY DEVICE AND IMAGE DISPLAY DEVICE |
| WO2021095603A1 (ja) * | 2019-11-11 | 2021-05-20 | 日亜化学工業株式会社 | 画像表示装置の製造方法および画像表示装置 |
| CN118983331A (zh) * | 2021-02-04 | 2024-11-19 | 上海天马微电子有限公司 | 显示面板及显示装置 |
| KR102927276B1 (ko) * | 2021-03-31 | 2026-02-13 | 엘지전자 주식회사 | 반도체 발광소자를 포함하는 디스플레이 장치 |
| KR102895217B1 (ko) * | 2021-07-30 | 2025-12-11 | 엘지전자 주식회사 | 반도체 발광소자를 포함하는 디스플레이 장치 |
| KR102875174B1 (ko) * | 2021-10-22 | 2025-10-23 | 엘지전자 주식회사 | 반도체 발광소자를 포함하는 디스플레이 장치 |
| KR20240090766A (ko) * | 2021-11-25 | 2024-06-21 | 엘지전자 주식회사 | 반도체 발광소자를 포함하는 디스플레이 장치 및 이의 제조 방법 |
| EP4447111A4 (en) * | 2021-12-08 | 2025-04-02 | LG Electronics Inc. | DISPLAY DEVICE COMPRISING A SEMICONDUCTOR LIGHT-EMITTING ELEMENT AND METHOD FOR MANUFACTURING THE SAME |
| US20250054923A1 (en) * | 2021-12-16 | 2025-02-13 | Lg Electronics Inc. | Display device comprising semiconductor light-emitting element |
| WO2023128095A1 (ko) * | 2021-12-27 | 2023-07-06 | 엘지전자 주식회사 | 반도체 발광 소자를 포함하는 디스플레이 장치 |
-
2022
- 2022-06-24 KR KR1020237044394A patent/KR102802249B1/ko active Active
- 2022-06-24 WO PCT/KR2022/009066 patent/WO2023277466A1/ko not_active Ceased
- 2022-06-24 CN CN202280046312.9A patent/CN117716497A/zh active Pending
- 2022-06-24 US US18/575,361 patent/US20240304774A1/en active Pending
- 2022-06-24 EP EP22833522.0A patent/EP4365950A4/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101987196B1 (ko) * | 2016-06-14 | 2019-06-11 | 삼성디스플레이 주식회사 | 픽셀 구조체, 픽셀 구조체를 포함하는 표시장치 및 그 제조 방법 |
| US20180190672A1 (en) * | 2017-01-03 | 2018-07-05 | Innolux Corporation | Display device |
| KR20200006651A (ko) * | 2018-07-10 | 2020-01-21 | 삼성디스플레이 주식회사 | 발광 장치 및 이를 구비한 표시 장치 |
| KR102173349B1 (ko) * | 2019-06-28 | 2020-11-03 | 엘지전자 주식회사 | 디스플레이 장치 제조를 위한 기판 및 디스플레이 장치의 제조방법 |
| KR20200026845A (ko) * | 2020-02-20 | 2020-03-11 | 엘지전자 주식회사 | 반도체 발광소자를 이용한 디스플레이 장치 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4365950A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4514098A1 (en) * | 2023-08-24 | 2025-02-26 | LG Electronics Inc. | A display device including a semiconductor light emitting device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4365950A1 (en) | 2024-05-08 |
| US20240304774A1 (en) | 2024-09-12 |
| EP4365950A4 (en) | 2025-07-02 |
| KR102802249B1 (ko) | 2025-05-07 |
| KR20240026143A (ko) | 2024-02-27 |
| CN117716497A (zh) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3837718A1 (en) | Display module and manufacturing method of display module | |
| WO2021002490A1 (ko) | 마이크로 led를 이용한 디스플레이 장치 및 이의 제조 방법 | |
| WO2016003019A1 (en) | Display device using semiconductor light emitting device | |
| WO2021066221A1 (ko) | 마이크로 led를 이용한 디스플레이 장치 및 이의 제조 방법 | |
| WO2020013408A1 (ko) | 발광 장치, 그의 제조 방법, 및 이를 구비한 표시 장치 | |
| WO2021162180A1 (ko) | 표시 장치 | |
| WO2020153767A1 (en) | Display module and repairing method of the same | |
| WO2021015350A1 (ko) | 반도체 발광 소자를 이용한 디스플레이 장치 및 그 제조 방법 | |
| WO2022211546A1 (ko) | 반도체 발광소자를 포함하는 디스플레이 장치 | |
| WO2021025243A1 (ko) | 반도체 발광 소자를 이용한 디스플레이 장치 | |
| WO2023008757A1 (ko) | 반도체 발광소자를 포함하는 디스플레이 장치 | |
| WO2023113148A1 (ko) | 반도체 발광 소자를 포함하는 디스플레이 장치 | |
| WO2023182625A1 (ko) | 불량 검사용 기판, 반도체 발광 소자 및 디스플레이 장치 | |
| WO2023033572A1 (ko) | 반도체 발광 소자를 포함하는 디스플레이 장치 및 이의 제조 방법 | |
| WO2021096050A1 (ko) | 표시 장치 및 표시 장치의 제조 방법 | |
| WO2021118088A1 (ko) | 표시 장치 및 이의 제조 방법 | |
| WO2020130493A1 (en) | Display module and manufacturing method of display module | |
| WO2022220558A1 (ko) | 반도체 발광소자를 포함하는 디스플레이 장치 | |
| WO2023033205A1 (ko) | 디스플레이 패널용 반도체 발광소자, 디스플레이 패널용 기판구조 및 이를 포함하는 디스플레이 장치 | |
| WO2022211549A1 (ko) | 반도체 발광소자를 포함하는 디스플레이 장치 | |
| WO2023096053A1 (ko) | 반도체 발광소자를 포함하는 디스플레이 장치 및 이의 제조 방법 | |
| WO2023106766A1 (ko) | 반도체 발광 소자 및 디스플레이 장치 | |
| EP3857602A1 (en) | Display module and repairing method of the same | |
| WO2023136378A1 (ko) | 디스플레이 장치 | |
| WO2023167349A1 (ko) | 반도체 발광 소자 및 디스플레이 장치 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22833522 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202280046312.9 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2022833522 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2022833522 Country of ref document: EP Effective date: 20240130 |