EP4000094A1 - Dispositif optoélectronique comportant des diodes électroluminescentes multicolores et son procédé de fabrication - Google Patents
Dispositif optoélectronique comportant des diodes électroluminescentes multicolores et son procédé de fabricationInfo
- Publication number
- EP4000094A1 EP4000094A1 EP20753983.4A EP20753983A EP4000094A1 EP 4000094 A1 EP4000094 A1 EP 4000094A1 EP 20753983 A EP20753983 A EP 20753983A EP 4000094 A1 EP4000094 A1 EP 4000094A1
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- European Patent Office
- Prior art keywords
- primary
- semiconductor part
- gallium
- secondary active
- doped semiconductor
- Prior art date
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- 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
-
- 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
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- 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]
- H10H20/01—Manufacture or treatment
-
- 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]
- H10H20/01—Manufacture or treatment
- H10H20/011—Manufacture or treatment of bodies, e.g. forming semiconductor layers
- H10H20/013—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials
- H10H20/0133—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials with a substrate not being Group III-V materials
- H10H20/01335—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials with a substrate not being Group III-V materials the light-emitting regions comprising nitride materials
-
- 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
- H10H20/81—Bodies
- H10H20/813—Bodies having a plurality of light-emitting regions, e.g. multi-junction LEDs or light-emitting devices having photoluminescent regions within the bodies
-
- 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
- H10H20/81—Bodies
- H10H20/817—Bodies characterised by the crystal structures or orientations, e.g. polycrystalline, amorphous or porous
- H10H20/818—Bodies characterised by the crystal structures or orientations, e.g. polycrystalline, amorphous or porous within the light-emitting regions
-
- 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
- H10H20/81—Bodies
- H10H20/822—Materials of the light-emitting regions
- H10H20/824—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP
- H10H20/825—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP containing nitrogen, e.g. GaN
-
- 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
- H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
-
- 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]
- H10H20/01—Manufacture or treatment
- H10H20/011—Manufacture or treatment of bodies, e.g. forming semiconductor layers
- H10H20/013—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials
- H10H20/0137—Manufacture or treatment of bodies, e.g. forming semiconductor layers having light-emitting regions comprising only Group III-V materials the light-emitting regions comprising nitride materials
-
- 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
Definitions
- TITLE Optoelectronic device comprising multicolored electroluminescent diodes and its manufacturing process
- the present invention relates to an optoelectronic device comprising a substrate defining a support face, at least a first light emitting diode and at least a second light emitting diode formed on the support face, each of said first and second light emitting diodes having an elongated three-dimensional shape. along a longitudinal direction oriented transversely to the support face.
- the present invention also relates to a method of manufacturing an optoelectronic device as such.
- a light-emitting diode is a semiconductor light-emitting unit formed by a stacked structure of an n-type doped semiconductor layer, an active layer made of at least one semiconductor material and a semiconductor layer p-type doped.
- the light emitting diode structure can be basically a 3D structure with a core-shell architecture or an axial architecture.
- the core-shell architecture is formed by an essentially vertical wire-type core made from a doped semiconductor having a first doping nature.
- An active layer emitting the majority of the light is formed on at least part of the core.
- An envelope made of one or a plurality of doped semiconductor (s) having a second type of doping partially or totally covers the active layer.
- the active layer of a light emitting diode can be composed of a plurality of semiconductor sublayers having a different forbidden band, such as quantum barrier sublayers alternating with well sublayers. quantum.
- the active layer of a light emitting diode is formed by a single structure or a plurality of structures of a group III nitride semiconductor formed on another group III nitride semiconductor.
- Most active layers of light emitting diodes are based on an InGaN alloy material.
- the composition ratio of indium or gallium in an lnxGa (lx) N compound of quantum well sublayers varies to order the wavelength of the light emitted.
- an object of the invention is to overcome at least one of the drawbacks of the optoelectronic devices described above, in particular:
- an optoelectronic device comprising a substrate delimiting a support face, at least one first light emitting diode and at least one second light emitting diode, each of said first and second light emitting diodes being formed on the support face and having a three-dimensional shape elongated along a longitudinal direction D oriented transversely to the support face, each first light emitting diode comprising:
- first primary doped semiconductor part doped according to a first doping type and connected to the substrate, the first semiconductor part primary doped delimiting a first external lateral part extending at least laterally around the first primary doped semiconductor part,
- first secondary active semiconductor part formed at least partially on a distal end of the first opposite primary doped semiconductor part, along the longitudinal direction D, at a proximal end formed on the support face
- each second light emitting diode comprising:
- a second primary doped semiconductor part doped according to the first doping type and connected to the substrate, the second primary doped semiconductor part delimiting a second external lateral part extending at least laterally around the second doped semiconductor part primary,
- the secondary active semiconductor emits a second light composed of a second range of wavelengths, the first outer side portion of the first primary doped semiconductor portion being configured to allow at least a first atomic species containing indium or gallium to diffuse from the first outer lateral part to the first secondary active semiconductor part during the formation of the first secondary active semiconductor part until the first secondary active semiconductor part reaches a first concentration atomic indium between 13% and 20%,
- the second outer lateral part of the second primary doped semiconductor part being configured to allow at least the first atomic species containing indium or gallium to diffuse from the second outer lateral part to the second secondary active semiconductor part during the formation of the second secondary active semiconductor part until the second secondary active semiconductor part reaches a second atomic concentration of indium of between 20% and 40%.
- the configuration of the first outer side portion consists of structuring its surface by means of plasma treatments or chemical reactions.
- the first outer side portion of the first primary doped semiconductor portion is configured to allow the first indium or gallium-containing atomic species to diffuse from the first outer side portion to the first semi portion.
- the first outer side portion is configured to have a first coefficient of adhesion, which represents the ratio of an amount of the first atomic species containing indium or gallium adsorbed to the first outer side portion and a total amount of the first atomic species containing indium or gallium arriving at the first outer side portion, and where the second outer side portion is configured to have a second coefficient of adhesion different from the first coefficient of adhesion, which represents the ratio between an amount of the first atomic species containing indium or gallium adsorbed on the second outer side part and a total amount of the first atomic species containing indium or gallium arriving on the second outer side part .
- the first outer lateral portion comprises at least a first primary layer comprising a material different from the first primary doped semiconductor portion and exhibiting the first coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse towards the first secondary active semiconductor part or towards the distal end, during its formation, on the first diffusion length L1.
- the second outer lateral part comprises at least a second primary layer comprising a material different from the second primary doped semiconductor part and having the second coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse towards the second secondary active semiconductor part or towards the distal end, during its formation, on the second diffusion length L2 .
- the first outer lateral part further comprises a first secondary layer of the same nature as the second primary layer, the first primary layer 110a being formed on said first secondary layer.
- the first primary layer is made at least from one SiOx alloy where 1 ⁇ x ⁇ 2
- the second primary layer is made from at least one SizNy alloy where l ⁇ y £ 4 and l £ z ⁇ 3 .
- the second atomic concentration of indium is between 20% and 27%.
- the optoelectronic device comprising at least a third light emitting diode formed on the support face and having a three-dimensional shape elongated along the longitudinal direction D oriented transversely to the support face,
- each third light emitting diode comprising:
- a third primary doped semiconductor part doped according to the first doping type and connected to the substrate, the third primary doped semiconductor part delimiting a third external lateral part extending at least laterally around the third doped semiconductor part primary,
- a third tertiary doped semiconductor part doped according to the second type of doping so that, when a voltage difference is applied between the third primary doped semiconductor part and the third tertiary doped semiconductor part, the third part
- the secondary active semiconductor emits a third light composed of a third range of wavelengths, the third outer side portion of the third primary doped semiconductor portion being configured to allow at least the first atomic species containing indium or gallium to diffuse from the third outer lateral semiconductor part to the third secondary active semiconductor part during the formation of the third secondary active semiconductor part until the third secondary active semiconductor part reaches a third concentration atomic indium between 27% and 40%.
- the third outer side portion is configured to allow the first indium or gallium-containing atomic species to diffuse from the third outer side portion to the third secondary active semiconductor portion over a third length of. L3 diffusion different from the first diffusion length L1 and from the second diffusion length L2.
- the third outer side portion is configured to have a third coefficient of adhesion different from the first coefficient of adhesion and the second coefficient of adhesion, which represents the ratio of an amount of the first atomic species containing indium or gallium adsorbed on the third outer side part and a total amount of the first atomic species containing indium or gallium arriving on the third outer side part.
- the third outer lateral part comprises at least a third primary layer comprising a material different from the first tertiary doped semiconductor part and having the third coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse from the third outer lateral part to the third secondary active semiconductor part over the third diffusion length L3.
- the third outer side portion further comprises a third secondary layer of the same nature as the first primary layer, the third primary layer being formed on said third secondary layer.
- the third outer side portion further comprises a third tertiary layer of the same nature as the second primary layer, the third primary layer being formed on the third tertiary layer.
- the third primer layer is made at least from a TiOmNn alloy with 0 ⁇ m £ 2 and 0 ⁇ n ⁇ 1.
- At least one layer of the group comprising the first primary layer, the second primary layer and the third primary layer is made of an amorphous material.
- At least one layer of the group comprising the first primary layer, the second primary layer and the third primary layer extends at least between two adjacent light emitting diodes of the group comprising the first light emitting diodes, the second light emitting diodes, and the third light emitting diodes in a plane generally parallel to the support face.
- This goal can be obtained by implementing a method of manufacturing an optoelectronic device comprising a substrate delimiting a face of support, at least a first light emitting diode and at least a second light emitting diode, each of the first and second light emitting diodes being formed on the support face and having a three-dimensional shape elongated along a longitudinal direction D oriented transversely to the face of support, the method comprising the following steps:
- first primary doped semiconductor part of each first light-emitting diode doped according to a first doping type and connected to the substrate, the first primary doped semiconductor part delimiting a first external lateral part extending at least laterally around the first primary doped semiconductor portion, the first outer side portion being configured to allow at least a first atomic species containing indium or gallium to diffuse from the first outer side portion to a first semiconductor portion.
- secondary active conductor or at the distal end during the formation of the first secondary active semiconductor part
- the formation using at least the first atomic species containing indium or gallium diffusing on the first outer lateral part, of the first secondary active semiconductor part at least partially on a distal end of the first semi-part -conductor doped primary opposite, along the longitudinal direction D, at a proximal end formed on the support face, the first secondary active semiconductor part comprising, at the end of step c), a first atomic concentration in indium between 13% and 20%, d) the formation, using at least the first atomic species containing indium or gallium diffusing on the second external lateral part, of the second secondary active semiconductor part at least partially on a distal end of the second opposed primary doped semiconductor portion, along the longitudinal direction D, at a proximal end formed on the supp face ort, the second secondary active semiconductor part comprising, at the end of step d), a second atomic concentration of indium of between 20% and 40%, e) forming a first tertiary doped semiconductor part doped according to a second doping type such
- Step c) and step d) are carried out at least partially during the same period.
- the first outer side portion is configured to allow the first indium or gallium-containing atomic species to diffuse from the first outer side portion to the first secondary active semiconductor portion over a first diffusion length L1 and where the second outer side portion of the second primary doped semiconductor portion is configured to allow the first indium or gallium-containing atomic species to diffuse from the second outer side portion to the second secondary active semiconductor portion over a second length of diffusion L2 different from the first diffusion length L1.
- the first outer side portion is configured to have a first coefficient of adhesion, which represents the ratio between an amount of the first atomic species containing indium or gallium adsorbed on the first outer side portion and a total amount of the first.
- atomic species containing indium or gallium arriving on the first outer lateral part and where the second outer lateral part is configured to have a second coefficient of adhesion different from the first coefficient of adhesion, which represents the ratio between an amount of the first atomic species containing indium or gallium adsorbed on the second outer side part and a total amount of the first atomic species containing indium or gallium arriving on the second outer side part.
- the second atomic concentration of indium is between 20% and
- the optoelectronic device comprising at least a third light emitting diode formed on the support face and having an elongated three-dimensional shape along the longitudinal direction D oriented transversely to the support face, the method comprising the following additional steps:
- a third primary doped semiconductor part of each third light-emitting diode doped according to the first doping type and connected to the substrate the third primary doped semiconductor part delimiting a third external lateral part extending at least laterally around the third primary doped semiconductor portion, the third outer lateral portion of the third primary doped semiconductor portion being configured to allow at least the first atomic species containing indium or gallium to diffuse from the third lateral part external to a third secondary active semiconductor part or at the distal end during the formation of the third secondary active semiconductor part,
- Step h) is carried out at least partially during the same period as step c) and step d).
- the third outer side portion is configured to allow the first indium or gallium-containing atomic species to diffuse from the third outer side portion to the third secondary active semiconductor portion over a third diffusion length L3 different from the first diffusion length L1 and the second diffusion length L2.
- the third outer lateral portion is configured to have a third coefficient of adhesion different from the first coefficient of adhesion and the second coefficient of adhesion, which represents the ratio between an amount of the first atomic species containing indium or gallium adsorbed on the third outer side part and a total amount of the first atomic species containing indium or gallium arriving on the third external lateral part.
- the method comprises at least one of the following additional steps:
- step a1) is carried out after step a
- step b1) is carried out after step b
- step g1) is carried out after step g).
- FIG. 1 illustrates a schematic cross section of a first light-emitting diode and a second light-emitting diode according to one embodiment of an optoelectronic device of the invention.
- FIG. 2 shows a schematic cross section of a first light emitting diode and of a second light emitting diode according to one embodiment of an optoelectronic device of the invention.
- FIG. 3 shows a schematic cross section of a first light-emitting diode and of a second light-emitting diode according to one embodiment of an optoelectronic device of the invention.
- FIG. 4 shows a schematic cross section of a first light emitting diode and of a second light emitting diode according to one embodiment of an optoelectronic device of the invention.
- FIG. 5 shows a schematic cross section of a first light emitting diode and a second light emitting diode and a third light emitting diode according to one embodiment of an optoelectronic device of the invention.
- FIG. 6 shows schematic cross sections of a first light emitting diode and of a second light emitting diode and of a third light emitting diode according to an embodiment of an optoelectronic device of the invention.
- FIG. 7 shows schematic cross-sections of two first adjacent light emitting diodes and two second adjacent light emitting diodes and two third adjacent light emitting diodes according to one embodiment of an optoelectronic device of the invention.
- FIG. 8 shows schematic cross sections of a first light emitting diode and a second light emitting diode and a third light emitting diode according to one embodiment of an optoelectronic device of the invention.
- FIG. 9 represents different steps of a method of manufacturing an optoelectronic device according to one embodiment of the invention.
- the terms “essentially”, “approximately” and “of the order of” mean “up to 10%, preferably up to 5%”.
- the different embodiments described are not exclusive to each other and can be combined together.
- the present application relates in particular to optoelectronic devices having light emitting diodes with a three-dimensional structure comprising three-dimensional elements, for example micro-wires, nanowires, or semiconductor elements in the form of tapered or tapered wire.
- the present application relates in particular to an optoelectronic device 10 as illustrated in FIG. 1.
- the optoelectronic device 10 comprises a substrate 101 defining a support face 101a.
- the optoelectronic device 10 also includes at least a first light emitting diode 110 and at least a second light emitting diode 210.
- Each of said first and second light emitting diodes 110, 210 is formed on the support face 101a and has a three-dimensional shape elongated along it. a longitudinal direction D oriented transversely to the support face 101a.
- the terms “formed on” mean “directly formed on” or “formed indirectly with the interposition of at least one layer”.
- embodiments are particularly described for light emitting diodes having a three-dimensional shape comprising microwires or nanowires.
- such embodiments can be implemented for three-dimensional light emitting diodes other than microwires or nanowires, for example conical or pyramidal three-dimensional light emitting diodes.
- Three-dimensional shaped light emitting diodes have an elongated shape along the preferred direction called the longitudinal direction D.
- a second dimension, called the small dimension of the light emitting diode extends transversely to the longitudinal direction D and represents a diameter of the light emitting diode .
- the dimension along the longitudinal direction D is in the range of 5 nm to 5 ⁇ m, preferably 50 nm to 2.5 ⁇ m, and is greater than or equal to 1 times, preferably greater than or equal to 5 times , and more preferably greater than or equal to 10 times the largest small dimension.
- the small dimensions may be less than or equal to about 1 ⁇ m, preferably in the range of 70 nm to 1 ⁇ m, more preferably of 100 nm to 800 nm.
- the height of each three-dimensional light emitting diode along the longitudinal dimension D may be greater than or equal to 500 nm, preferably in the range of 1 ⁇ m to 50 ⁇ m.
- Each first light-emitting diode 110 comprises a first primary doped semiconductor part 110a doped according to a first doping type, chosen between a P type and an N doping type, and connected to the substrate 101.
- the term “connected” is understood to mean equivalent, “electrically connected” or “connected in isolation by physical contact” and / or “directly or indirectly connected”.
- the first primary doped semiconductor part 110a is formed at least partially from minus a semiconductor material such as silicon, germanium, silicon carbide, a III-V compound such as III-N compounds, a II-VI compound or a combination of these compounds.
- Group III elements include gallium (Ga), indium (In) or aluminum (Al).
- III-N compounds are GaN, AIN, InN, InGaN, AIGaN or AlInGaN.
- Other elements of group V can also be used, for example phosphorus or arsenic. Generally the elements in compound III-V can be combined with different mole fractions.
- group II elements include an element of group MA, in particular beryllium (Be) and magnesium (Mg) and elements of group MB, in particular zinc (Zn) and cadmium (Cd).
- elements of group VI include elements of group VIA, in particular oxygen (O) and tellurium (Te).
- Examples of compounds II-VI are ZnO, ZnMgO, CdZnO or CdZn-MgO.
- the dopant can be selected from the group comprising a dopant of group II type P, for example, magnesium (Mg), zinc (Zn), cadmium (Cd) or mercury (Hg), a group IV type P dopant, e.g. carbon (C) and a group IV dopant type N, e.g. silicon (Si), germanium (Ge), selenium (Se) , sulfur (S), terbium (Tb) or tin (Sn).
- group II type P for example, magnesium (Mg), zinc (Zn), cadmium (Cd) or mercury (Hg)
- a group IV type P dopant e.g. carbon (C)
- a group IV dopant type N e.g. silicon (Si), germanium (Ge), selenium (Se) , sulfur (S), terbium (Tb) or tin (Sn).
- the first primary doped semiconductor part 110a delimits a first external lateral part 110b extending at least laterally around the first primary doped semiconductor part 110a.
- the outer side portions 110b refer to the side surfaces substantially parallel to the longitudinal direction D.
- the outer side portions 110b refer to the outer layers or surfaces having a normal vector substantially perpendicular to the longitudinal direction D.
- the outer side parts refer to the outer surfaces connecting the perimeter of the base of the light emitting diode to the top.
- Each first light emitting diode 110 also includes a first secondary active semiconductor portion 110c formed at least partially on a distal end HOd of the first primary doped semiconductor portion 110a opposite, along the longitudinal direction D, to a proximal end formed on the support face 101a.
- the first secondary active semiconductor part 110c can comprise means for confining the carriers of electric charges such as a quantum well and / or quantum barriers.
- the first secondary active semiconductor part 110c can be essentially produced, at the end of its formation, based on a compound II-VI or a compound III-V but preferably from an III-V alloy and more particularly produced from an IIWGa (IW) N alloy, where w is less than or equal to 1.
- the atomic concentration of indium in the first secondary active semiconductor part 110c is therefore related to the concentration of gallium in the alloy during and at the end of the formation of the lnwGa (lw) N alloy.
- the first secondary active semiconductor part 110c can be formed using incoming atomic species based on indium and / or gallium such as trimethylindium (TMIn) as the source of indium and / or triethylgallium gas (TEGa) or trimethylgallium (TMGa) as gallium sources or by direct heating of metal sources / ingots using effusion cells.
- TMIn trimethylindium
- TMGa triethylgallium gas
- TMGa trimethylgallium
- Indium atoms adsorb and desorb at a surface of the first secondary active semiconductor part 110c, 110a, 110b, HOd and are incorporated at a certain rate into the first secondary active semiconductor part 110c to form the lnwGa (lw) N alloy.
- the atomic concentration of indium and / or gallium changes during the formation of the first secondary active semiconductor part 110c depending on many parameters, such as the amount of indium atoms available at the surface of the first part. secondary active semiconductor 110c and / or the temperature and / or the amount of surrounding gallium atoms available at the surface of the first secondary active semiconductor part 110c.
- the amount of indium atom species available at the surface of the first secondary active semiconductor part 110c depends mostly on the indium atomic species diffusing from the first outer lateral part 110b of the first part primary doped semiconductor 110a.
- the first outer side portion 110b of the first primary doped semiconductor portion 110a is configured to allow at least a first atomic species containing indium or gallium, from sources of indium or gallium, to diffuse from the first outer lateral part 110b to the first secondary active semiconductor part 110c during the formation of the first semi part secondary active conductor 110c until the first secondary active semiconductor part 110c reaches a first atomic concentration of indium of between 13% and 20%.
- Such a configuration of the first outer side portion 110b is advantageous for accurately controlling the atomic concentration of indium in the first secondary active semiconductor portion 110c during its formation. Controlling the amount of the indium atomic species diffusing from the first outer side portion 110b is advantageous for controlling the atomic concentration of indium in the first secondary active semiconductor portion 110c during its formation.
- the target atomic concentration of indium during formation of the first secondary active semiconductor part 110c is between 13% and 20%, therefore the amount of indium diffusing from the first outer lateral part 110b must be kept quite low.
- the configuration of the first outer lateral portion 110b consists in structuring its surface by means of plasma treatments or chemical reactions.
- the configuration of the first outer side portion 110b consists of forming the suitable material with which the first outer side portion 110b is made. This material will allow the first atomic species containing indium or gallium to diffuse from the first outer lateral part 110b to the first secondary active semiconductor part 110c over a first diffusion length L1.
- the first diffusion length L1 can be between 5 nm and 5 ⁇ m in order to keep the diffusion length L1 relatively limited in order to limit the amount of indium atomic species which diffuses from the first outer lateral part 110b to the first. secondary active semiconductor part 110c.
- the atomic concentration of indium in the first secondary active semiconductor part 110c must be maintained between 13% and 20%, therefore it is advantageous to have a limited diffusion length L1 to prevent atomic species of indium, which are located at a further distance than the diffusion length L1, from reaching the first secondary active semiconductor portion 110c, thereby limiting the amount of indium available during the formation of the first secondary active semiconductor portion 110c.
- the configuration of the first outer side part 110b consists of forming the material, with which the first outer side part 110b is made, so that the material has a first coefficient of adhesion.
- the first coefficient of adhesion represents the ratio between an amount of the first atomic species containing indium or gallium adsorbed on the first outer side portion 110b and a total amount of the first atomic species containing indium or gallium arriving on the first external lateral part 110b.
- the first coefficient of adhesion is between 0 and 1, but, preferably, kept rather low so that the quantity of the first atomic species containing indium which adsorbs on the first external lateral part 110b and then diffuses towards the first secondary active semiconductor part 110c, leads to an atomic concentration of indium maintained in a low ratio between 13 and 20%.
- the first outer lateral part 110b comprises at least a first primary layer 110a comprising a material different from the first primary doped semiconductor part 110a.
- the first primary layer llOba has the first coefficient of adhesion or allows at least the first atomic species containing indium or gallium to diffuse towards the first secondary active semiconductor part 110c, during its formation, over the first length of diffusion Ll.
- This architecture is advantageous because different light emitting diodes of three-dimensional shape of the optoelectronic device 10 can contain different primary layers made of different materials and then different diffusion lengths or different adhesion coefficients can be obtained. So, this leads to different atomic concentrations of indium or gallium in the different respective active semiconductor parts of the light emitting diodes.
- the first primary layer 11Oba is made at least from an SiOx alloy where 1 ⁇ x ⁇ 2.
- Each first light-emitting diode 110 also comprises a first tertiary doped semiconductor part 110th doped according to a second doping type so that when a voltage difference is applied between the first primary doped semiconductor part 110a and the first semi-conductor part 110a.
- the first secondary active semiconductor part 110c emits a first light composed of a first range of wavelengths.
- the atomic concentration of indium and therefore the concentration of gallium, which are linked by the composition of the InwGal-wN alloy, define the first range of wavelengths. Since the first atomic concentration of indium is between 13% and 20%, it implies a range of the first emitted wavelength of between 430 and 490 nm which is in the blue color range.
- the second light-emitting diode 210 comprises a second primary doped semiconductor part 210a doped according to the first doping type and connected to the substrate 101.
- the second primary doped semiconductor part 210a is formed, in one example, with the same composition of material. and generally with the same dimensions as the first primary doped semiconductor part 110a of the first light emitting diode 110.
- the second primary doped semiconductor part 210a delimits a second external lateral part 210b which extends at least laterally around the second primary doped semiconductor part 210a.
- the optoelectronic device 10 also comprises a second secondary active semiconductor part 210c formed at least partially on a distal end 210d of the second primary doped semiconductor part 210a. opposite, along the longitudinal direction D, to a proximal end formed on the support face 101a.
- the second secondary active semiconductor part 210c is, in one example, made of a base material lnpGa (lp) N similar to the first secondary active semiconductor part 110c but with an atomic concentration of indium and / or gallium different, i.e. p is different from w and preferably p> w.
- the second outer lateral part 210b of the second primary doped semiconductor part 210a is configured to allow, according to the same mechanisms as those explained for the first light emitting diode 110, at least the first atomic species containing indium or gallium. diffusing from the second outer lateral part 210b to the second secondary active semiconductor part 210c during the formation of the second secondary active semiconductor part 210c until the second secondary active semiconductor part 210c reaches a second concentration atomic indium between 20% and 40%.
- the term “between 20% and 40%” means “strictly greater than 20% and less than or equal to 40%”.
- Such a configuration of the second outer lateral part 210b is advantageous for precisely controlling the atomic concentration of indium in the first secondary active semiconductor part 210c during its formation. Controlling the amount of the indium atomic species diffusing from the second outer side portion 210b is advantageous for controlling the atomic concentration of indium in the second secondary active semiconductor portion 210c during its formation.
- the target indium atomic concentration during the formation of the second secondary active semiconductor part 210c is between 20% and 40%, therefore the amount of indium diffusing from the second outer lateral part 210b should be kept greater than that of the case. of the first light-emitting diode.
- the configuration of the second outer lateral part 210b consists in structuring its surface by means of plasma treatments or chemical reactions. The rougher the second outer lateral part 210b or with relief, the lower the quantity of indium species that can diffuse from the second outer lateral part 210b to participate in the formation of the second secondary active semiconductor part 210c.
- the configuration of the second outer side part 210b consists of forming the right material with which the second outer side part 210b is made. This material will allow the first atomic species containing indium or gallium to diffuse from the second outer lateral part 210b to the second secondary active semiconductor part 210c over a second length of diffusion L2 different from the first diffusion length L1.
- the second diffusion length L2 is preferably greater than the first diffusion length L1.
- the second diffusion length L2 can be between 10 nm and 30 ⁇ m in order to keep the diffusion length L2 relatively high in order to improve the amount of indium atomic species which diffuses from the second outer side part 210b to the second secondary active semiconductor part 210c.
- the atomic concentration of indium in the second secondary active semiconductor part 210c must be maintained between 20% and 40%, so it is advantageous to have a diffusion length L2 greater than the first diffusion length to allow first atomic species of indium or gallium, which are located at a further distance than the diffusion length L2, to reach the second secondary active semiconductor part 210c, thus increasing the amount of indium available during the formation of the second secondary active semiconductor part 210c.
- the configuration of the second outer side part 210b consists of forming the material with which the second outer side part 210b is made, so that the material has a second coefficient of adhesion.
- the second coefficient of adhesion represents the ratio between an amount of the first atomic species containing indium or gallium, from the sources of indium or gallium, adsorbed on the second outer side part 210b and a total amount of the first atomic species containing indium or gallium arriving on the second outer lateral part 210b.
- the second coefficient of adhesion is between 0 and 1 but is different from the first coefficient of adhesion.
- the second coefficient of adhesion is preferably kept higher than the first coefficient of adhesion so that the quantity of the first atomic species containing indium which is adsorbed on the second external lateral part 210b and then diffuses towards the second part secondary active semiconductor 210c, leads to an atomic concentration of indium maintained in a higher ratio of between 20 and 40%.
- the second outer lateral part 210b comprises at least a second primary layer 210ba comprising a material different from the second primary doped semiconductor part 210a.
- the second primary layer 210ba can have the second coefficient of adhesion or allow at least the first atomic species containing indium or gallium to diffuse towards the second secondary active semiconductor part 210c, during its formation, on the second. diffusion length L2.
- the second primary layer 210ba is made at least from a SizNy alloy where 1 ⁇ y ⁇ 4 and 1 ⁇ z ⁇ 3. In another example, the second primary layer 210ba is made at least from a TiOmNn alloy with 0 ⁇ m £ 2 and 0 ⁇ n ⁇ 1.
- first and second light emitting diodes of three dimensional shape of the optoelectronic device 10 can contain different primary layers made of different materials and then different diffusion lengths or different adhesion coefficients can be obtained. Therefore, this leads to different atomic concentrations of indium or gallium in the respective different active semiconductor parts of the first and second light emitting diodes during their formation. This can therefore lead to the generation of different colors from different light emitting diodes potentially having the same dimensions.
- the optoelectronic device 10 also comprises a second tertiary doped semiconductor part 210e doped according to the second type of doping so that, when a voltage difference is applied between the second primary doped semiconductor part 210a and the second semiconductor part 210a and the second semiconductor part.
- Tertiary doped conductor 210e the second secondary active semiconductor part 210c emits a second light composed of a second range of wavelengths.
- the second atomic concentration of indium being between 20% and 40%, it implies a range of the second emitted wavelength of between 490 and 750 nm which is in the green-red color range.
- the optoelectronic device 10 comprises at least one first light emitting diode 110 and at least one second light emitting diode 210 as described above.
- the first outer lateral portion 110b of the first primary doped semiconductor portion 110a of at least a first light emitting diode 110 of the optoelectronic device 10 is configured to allow the first atomic species containing indium or gallium to diffuse from the first outer side portion 110b to the first secondary active semiconductor portion 110c or to the distal end HOd prior to the formation of the first secondary active semiconductor portion 110c on the first diffusion length L1.
- the second outer lateral portion 210b of the second primary doped semiconductor portion 210a of at least a second light emitting diode 210 of the optoelectronic device 10 is configured to allow the first atomic species containing indium or gallium to diffuse from the second outer lateral part 210b to the second part secondary active semiconductor 210c or at the distal end 210d on the second diffusion length L2 different from the first diffusion length L1.
- the first outer side portion 110b is configured to have the first coefficient of adhesion
- the second outer side portion 210b is configured to have the second coefficient of adhesion different from the first coefficient of adhesion.
- the first external lateral part 110b, of at least a first light-emitting diode 110 comprises at least a first primary layer 11Oba comprising a material different from the first primary doped semiconductor part. 110a and having the first coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse towards the first secondary active semiconductor part 110c or towards the distal end HOd, during its formation, on the first diffusion length L1.
- the second outer lateral part 210b, of at least a second light-emitting diode 210 comprises at least a second primary layer 210ba comprising a material different from the second primary doped semiconductor part 210a and having the second coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse towards the second secondary active semiconductor part 210c or towards the distal end 210d, during its formation, over the second length of L2 diffusion.
- At least a first light-emitting diode comprises at least a first primary layer 11Oba comprising a material different from the first primary doped semiconductor part 110a and having the first coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse towards the first secondary active semiconductor part 110c, during its formation, on the first diffusion length L1
- at least one second light emitting diode 210 comprises at least one second primary layer 210ba comprising a material different from the second primary doped semiconductor part 210a and having the second coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse towards the second secondary active semiconductor part 210c, during its formation, or 210d (before the formatting of the second secondary active semiconductor part 210c) on the second diffusion length L2.
- the first external lateral part 110b, of at least a first light-emitting diode further comprises a first secondary layer HObb of the same nature as the second primary layer 210ba of at least one second light-emitting diode, the first primary layer 11Oba being formed on said first secondary layer HObb.
- the terms “formed on”, “formed directly on” or “formed indirectly with the interposition of at least one layer” are understood.
- the first primary layer 11Oba contains at least one SiOx alloy where 1 ⁇ x ⁇ 2 and the second primary layer 210ba contains at least one SizNy alloy where l £ y £ 4 and l ⁇ z ⁇ 3.
- the first primary layer 11Oba contains at least one SiOx alloy where 1 ⁇ x ⁇ 2 and the second primary layer 210ba contains at least one TiOmNn alloy with 0 ⁇ m ⁇ 2 and 0 ⁇ n £ 1.
- This embodiment is advantageous because at least two light emitting diodes emitting different colors can be obtained in the same optoelectronic device by simply adding an additional layer on a light emitting diode.
- the manufacturing cost is therefore kept low compared to another manufacturing process for obtaining multi-colored electroluminescent devices.
- the second atomic indium concentration of at least a second secondary active semiconductor part 210c is between 20% and 27%.
- the second indium atomic concentration between 20% and 27% implies a wavelength generation between 490nm and 550nm which corresponds to a green color emission for the second light emitting diode 210 in the following embodiments.
- the second diffusion length L2 is reduced compared to the previous embodiment so that the amount of the first atomic species containing indium or gallium diffusing from the second outer side part 210b to the second secondary active semiconductor part 210c is limited to provide a second atomic concentration of indium in the second secondary active semiconductor part 210c of between 20% and 27%.
- the optoelectronic device 10 comprises at least a third light emitting diode 310 formed on the support face 101a and having a three-dimensional shape elongated along the longitudinal direction D oriented transversely to the face of support 101a, each third light emitting diode 310 comprising:
- a third active secondary semiconductor part 310c formed at least partially on a distal end 310d of the third doped primary semiconductor part 310a opposite, along the longitudinal direction D, at a proximal end formed on the support face 101a ,
- a third tertiary doped semiconductor part 310e doped according to the second type of doping so that, when a voltage difference is applied between the third primary doped semiconductor part 310a and the third tertiary doped semiconductor part 310e, the third secondary active semiconductor part 310c emits a third light composed of a third wavelength range
- the third outer side portion 310b of the third primary doped semiconductor portion 310a being configured to allow at least the first atomic species containing indium or gallium to diffuse from the third outer side portion 310b to the third semiconductor portion.
- secondary active conductor 310c during the formation of the third secondary active semiconductor part 310c until the third secondary active semiconductor part 310c reaches a third atomic concentration of indium of between 27% and 40%.
- the term “between 27% and 40%” means “strictly greater than 27% and less than or equal to 40%”.
- the first tertiary doped semiconductor part 310a is, in one example, of shape and composition and / or of dimensions similar to that (s) of a first primary doped semiconductor part 110a and / or of a second primary doped semiconductor part 210a.
- the third tertiary doped semiconductor part 310e is of a nature and / or dimensions similar to that (s) of the third primary doped semiconductor part 110e and / or of the third semiconductor part. 210th secondary doped conductor.
- the third secondary active semiconductor part 310c is, in one example, made of a base material lntGa (lt) N 0 ⁇ t ⁇ 1 similar to the first secondary active semiconductor part 110c, but with an atomic concentration of different indium and / or gallium, i.e., t is different from w or p and preferably t> p> w.
- the third atomic indium concentration of the third secondary active semiconductor part 310c of between 27% and 40% implies a generation of wavelength between 550 nm and 750 nm which corresponds to a generation of red color.
- the third outer side portion 310b is configured to allow the first atomic species containing indium or gallium to diffuse from the third outer side portion 310b to the third secondary active semiconductor portion 310c over a third length. of diffusion L3 different from the first diffusion length L1 and from the second diffusion length L2.
- the third diffusion length L3 is preferably greater than the first diffusion length L1 and the second diffusion length L2.
- the third diffusion length L3 can be between 10 nm and 50 ⁇ m in order to keep the diffusion length L3 greater than the second diffusion length L2.
- it is also advantageous that the third length of diffusion L3 is greater than the first diffusion length L1 and the second diffusion length L2.
- the atomic concentration of indium in the third secondary active semiconductor part 310c must be maintained between 27% and 40%, therefore it is advantageous to have a diffusion length L3 greater than the second diffusion length L2 to allow to the first atomic species of indium or gallium, which are located at a distance farther than the diffusion length L3, to reach the third secondary active semiconductor part 310c or the distal end 310d, thus increasing the amount of d indium available during the formation of the third secondary active semiconductor part 310c.
- the configuration of the third outer side part 310b consists of forming the material, with which the third outer side part 310b is made, so that the material has a third coefficient of adhesion.
- the third coefficient of adhesion represents the ratio between an amount of the first atomic species containing indium or gallium, from sources of indium or gallium, adsorbed on the third outer side part 310b and a total amount of the first atomic species containing indium or gallium arriving on the third outer lateral part 310b.
- the third coefficient of adhesion is between 0 and 1 but is different from the first coefficient of adhesion and from the second coefficient of adhesion.
- the third coefficient of adhesion is preferably kept greater than the first and second coefficients of adhesion so that the quantity of the first atomic species containing indium which is adsorbed on the third outer lateral part 310b, and is then diffuses to the third secondary active semiconductor part 310c, resulting in an atomic concentration of indium maintained in a higher ratio of between 27 and 40%.
- the third outer lateral part 310b comprises at least a third primary layer 310ba comprising a material different from the first tertiary doped semiconductor part 310a and having the third coefficient of adhesion or allowing at least the first atomic species containing indium or gallium to diffuse from the third outer lateral part 310b to the third secondary active semiconductor part 310c on the third diffusion length L3.
- the third outer lateral part 310b further comprises a third secondary layer 310bb of the same nature as the first primary layer 110ba, the third primary layer 310ba being formed on said third secondary layer 310bb.
- the third outer lateral part 310b further comprises a third tertiary layer 310bc of the same nature as the second primary layer 210ba, the third primary layer 310ba being formed on the third tertiary layer 310bc.
- At least a second light emitting diode 210 comprises the second primary layer 210ba and at least a first light emitting diode 110 comprises a first secondary layer HObb of the same nature as the second primary layer 210ba, the first layer primary llOba being formed on said first secondary layer HObb.
- This example is advantageous because it makes it possible to provide at least three different light-emitting diodes emitting three different colors but having generally the same dimensions and on the same substrate without any mechanical or transfer step.
- the third primary layer 310ba is made at least from a TiOmNn alloy with 0 ⁇ m £ 2 and 0 £ n ⁇ 1.
- At least one layer of the first primary layer 110ba and / or the second primary layer 210ba and / or the third primary layer 310ba is made of an amorphous material.
- At least the first primary layer 110ba and / or the second primary layer 210ba and / or the third primary layer 310ba extend / extend at least between two adjacent light-emitting diodes of the group comprising the first light-emitting diodes 110, the second light-emitting diodes 210 and the third light-emitting diodes 310 in a plane generally parallel to the support face 101a.
- This example is advantageous for ensuring at the same time an electrical insulation between the light-emitting diodes.
- the invention also relates to a method of manufacturing an optoelectronic device 10 where the optoelectronic device 10 comprises a substrate 101 defining a support face 101a, at least one first light emitting diode 110 and at least one second light emitting diode 210, each first and second light emitting diodes 110, 210 being formed on the support face 101a and having an elongated three-dimensional shape along a longitudinal direction D oriented transversely to the support face 101a, the method comprising the following steps:
- first primary doped semiconductor part 110a of each first light-emitting diode 110 doped according to a first doping type and connected to the substrate 101 the first primary doped semiconductor part 110a delimiting a first external lateral part 110b extending at least laterally around the first primary doped semiconductor portion 110a, the first outer lateral portion 110b being configured to allow at least a first atomic species containing indium or gallium to diffuse from the first lateral portion external 110b to a first secondary active semiconductor part 110c or to the distal end HOd during the formation of the first secondary active semiconductor part 110c,
- the first secondary active semiconductor part 110c forming, using at least the first atomic species containing indium or gallium diffusing on the first outer lateral part 110b, of the first secondary active semiconductor part 110c at least partially on a distal end HOd of the first semiconductor part doped primary 110a opposite, along the longitudinal direction D, to a proximal end formed on the support face 101a, the first secondary active semiconductor portion 110c comprising, at the end of step c, a first atomic concentration of indium between 13% and 20%,
- step d) forming, using at least the first atomic species containing indium or gallium diffusing on the second outer lateral part 210b, of the second secondary active semiconductor part 210c at least partially on a distal end 210d of the second primary doped semiconductor part 210a opposite, along the longitudinal direction D, to a proximal end formed on the support face 101a, the second secondary active semiconductor part 210c comprising, at the end of step d, a second atomic concentration of indium of between 20% and 40%,
- step c) and step d) are carried out at least partially during the same period. This is advantageous for reducing the cost of manufacture.
- the first outer side portion 110b is configured to allow the first atomic species containing indium or gallium to diffuse from the first outer side portion 110b to the first secondary active semiconductor portion 110c. over a first diffusion length L1.
- the second outer side portion 210b of the second primary doped semiconductor portion 210a is configured to allow the first atomic species containing indium or gallium to diffuse from the second outer side portion 210b to the second secondary active semiconductor part 210c on a second diffusion length L2 different from the first diffusion length L1.
- the first outer side portion 110b is configured to have the first coefficient of adhesion
- the second outer side portion 210b is configured to have the second coefficient of adhesion different from the first coefficient of adhesion. .
- the second atomic concentration of indium is between 20% and 27%.
- the optoelectronic device 10 comprises at least a third light emitting diode 310 formed on the support face 101a and having an elongated three-dimensional shape along the longitudinal direction D oriented transversely to the support face 101a, the method comprising the following additional steps:
- step h) forming, using at least the first atomic species containing indium or gallium diffusing on the third outer lateral part 310b, of the third secondary active semiconductor part 310c at least partially on a distal end 310d of the third primary doped semiconductor part 310a opposite, along the longitudinal direction D, to a proximal end formed on the support face 101a, the third secondary active semiconductor part 310c comprising, at the end of step h) , a third atomic concentration of indium of between 27% and 40%,
- step h) is carried out at least partially during the same period as step c) and step d). This is advantageous for reducing manufacturing costs.
- the third outer side portion 310b is configured to allow the first atomic species containing indium or gallium to diffuse from the third outer side portion 310b to the third secondary active semiconductor portion 310c over a third length. of diffusion L3 different from the first diffusion length L1 and from the second diffusion length L2.
- the third outer lateral portion 310b is configured to have a third coefficient of adhesion different from the first coefficient of adhesion and from the second coefficient of adhesion.
- the method comprises at least one of the following additional steps:
- step a1) is carried out after step a
- step b1) is carried out after step b)
- step g1) is carried out after step g).
- two successive steps of the process can be separated by one or more intermediate step (s) consisting of protecting with a resin one or more light-emitting diode (s) from the reception of the material. designated as one of the neighboring light emitting diodes.
- Other intermediate steps consist in removing the protective resin.
- This method is advantageous because it shows how to obtain at least three different types of light emitting diodes, each emitting a color. different and having generally the same dimensions, on the same substrate and with common technologies.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1907963A FR3098993B1 (fr) | 2019-07-15 | 2019-07-15 | Dispositif optoélectronique comportant des diodes électroluminescentes multicolores et son procédé de fabrication |
| PCT/FR2020/051259 WO2021009458A1 (fr) | 2019-07-15 | 2020-07-10 | Dispositif optoélectronique comportant des diodes électroluminescentes multicolores et son procédé de fabrication |
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| EP4000094A1 true EP4000094A1 (fr) | 2022-05-25 |
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| EP20753983.4A Pending EP4000094A1 (fr) | 2019-07-15 | 2020-07-10 | Dispositif optoélectronique comportant des diodes électroluminescentes multicolores et son procédé de fabrication |
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| Country | Link |
|---|---|
| US (1) | US12315848B2 (fr) |
| EP (1) | EP4000094A1 (fr) |
| FR (1) | FR3098993B1 (fr) |
| WO (1) | WO2021009458A1 (fr) |
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| EP2357676A4 (fr) * | 2008-10-17 | 2013-05-29 | Univ Hokkaido Nat Univ Corp | Réseau d'éléments électroluminescents à semi-conducteurs et son procédé de fabrication |
| KR101898679B1 (ko) * | 2012-12-14 | 2018-10-04 | 삼성전자주식회사 | 나노구조 발광소자 |
| US10734545B2 (en) * | 2017-06-21 | 2020-08-04 | The Regents Of The University Of Michigan | Monolithically integrated InGaN/GaN quantum nanowire devices |
| US11133649B2 (en) * | 2019-06-21 | 2021-09-28 | Palo Alto Research Center Incorporated | Index and gain coupled distributed feedback laser |
-
2019
- 2019-07-15 FR FR1907963A patent/FR3098993B1/fr active Active
-
2020
- 2020-07-10 WO PCT/FR2020/051259 patent/WO2021009458A1/fr not_active Ceased
- 2020-07-10 EP EP20753983.4A patent/EP4000094A1/fr active Pending
- 2020-07-10 US US17/626,913 patent/US12315848B2/en active Active
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| Publication number | Publication date |
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| FR3098993A1 (fr) | 2021-01-22 |
| FR3098993B1 (fr) | 2024-10-25 |
| US12315848B2 (en) | 2025-05-27 |
| US20220359472A1 (en) | 2022-11-10 |
| WO2021009458A1 (fr) | 2021-01-21 |
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