WO2023239224A1 - 회로기판 및 이를 포함하는 반도체 패키지 - Google Patents
회로기판 및 이를 포함하는 반도체 패키지 Download PDFInfo
- Publication number
- WO2023239224A1 WO2023239224A1 PCT/KR2023/008033 KR2023008033W WO2023239224A1 WO 2023239224 A1 WO2023239224 A1 WO 2023239224A1 KR 2023008033 W KR2023008033 W KR 2023008033W WO 2023239224 A1 WO2023239224 A1 WO 2023239224A1
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- Prior art keywords
- circuit pattern
- protective layer
- layer
- thickness
- region
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
-
- 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
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
- H10W70/62—Insulating or insulated package substrates; Interposers; Redistribution layers characterised by their interconnections
- H10W70/65—Shapes or dispositions of interconnections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/111—Pads for surface mounting, e.g. lay-out
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/107—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by filling grooves in the support with conductive material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistors
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3452—Solder masks
-
- 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
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
-
- 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
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
- H10W70/67—Insulating or insulated package substrates; Interposers; Redistribution layers characterised by their insulating layers or insulating parts
- H10W70/68—Shapes or dispositions thereof
-
- 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
- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/60—Insulating or insulated package substrates; Interposers; Redistribution layers
- H10W70/67—Insulating or insulated package substrates; Interposers; Redistribution layers characterised by their insulating layers or insulating parts
- H10W70/68—Shapes or dispositions thereof
- H10W70/685—Shapes or dispositions thereof comprising multiple insulating layers
-
- 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
- H10W72/00—Interconnections or connectors in packages
- H10W72/90—Bond pads, in general
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- 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
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/098—Special shape of the cross-section of conductors, e.g. very thick plated conductors
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09827—Tapered, e.g. tapered hole, via or groove
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09845—Stepped hole, via, edge, bump or conductor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/05—Patterning and lithography; Masks; Details of resist
- H05K2203/0562—Details of resist
- H05K2203/0594—Insulating resist or coating with special shaped edges
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- 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
- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/10—Encapsulations, e.g. protective coatings characterised by their shape or disposition
- H10W74/111—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being completely enclosed
- H10W74/114—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being completely enclosed by a substrate and the encapsulations
- H10W74/117—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being completely enclosed by a substrate and the encapsulations the substrate having spherical bumps for external connection
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- 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
Definitions
- the embodiment relates to a circuit board and a semiconductor package including the same.
- the line width of circuits is becoming smaller.
- the circuit line width of the package substrate or circuit board on which the semiconductor chip is mounted is being miniaturized to several micrometers or less.
- the embedded trace substrate (ETS) method of embedding copper foil in an insulating layer has been used in the industry to implement finer circuit patterns. Since the ETS method manufactures a copper foil circuit by embedding it into the insulating layer instead of forming it by protruding it from the surface of the insulating layer, there is no circuit loss due to nicking, which is advantageous in refining the circuit pitch.
- ETS embedded trace substrate
- chips are mounted on the above circuit board or combined with the main board of an external device to form a package board.
- a groove is formed in the protective layer disposed on the outermost side of the circuit board, and a solder ball for mounting the chip or joining the main board is disposed within the groove.
- the package substrate may be manufactured by mounting a chip on the solder ball or joining a main board and then forming a molding layer for molding the main board.
- a metal contact layer (IMC: Inter Metallic Contact) is formed between the solder ball and the metal layer coupled to the solder ball.
- IMC Inter Metallic Contact
- Embodiments provide a circuit board with a new structure and a semiconductor package including the same.
- the embodiment provides a circuit board that can improve the reliability of a metal bonding layer (IMC) and a semiconductor package including the same.
- IMC metal bonding layer
- the embodiment provides a circuit board capable of increasing the contact area between the connection portion and the pad, and a semiconductor package including the same.
- a circuit board includes an insulating layer; a first circuit pattern disposed on the insulating layer; and a first protective layer disposed on the insulating layer and including a first open portion vertically overlapping the first circuit pattern, wherein the first protective layer includes the first open portion, a first region having a thickness of 1, and a second region not including the first open portion and having a second thickness greater than the first thickness, wherein the first thickness of the first region is equal to the first thickness of the first region.
- the inner surface of the first area which is smaller than the third thickness of the circuit pattern and constitutes the first open portion, includes a first inner surface in direct contact with an outer surface of the first circuit pattern, and a first inner surface of the first circuit pattern. It includes a second inner surface spaced apart from the outer surface.
- the second inner surface of the first area is connected to the first inner surface of the first area, and has a slope corresponding to the slope of the first inner surface.
- the second thickness of the second area is greater than the third thickness of the first circuit pattern.
- the first circuit pattern includes a region whose width decreases toward the upper surface of the first circuit pattern, and the second inner surface of the first region has a region where the width of the first circuit pattern decreases. It is spaced apart from the outer surface of the area.
- the first thickness of the first area satisfies a range of 20% to 90% of the third thickness of the first circuit pattern.
- the first circuit pattern may include: a first part disposed on an upper surface of the insulating layer and having an outer surface in contact with the first inner surface of the first region; and a second part disposed on the first part, the outer surface of which does not contact the first protective layer, wherein the second part includes a region having a width smaller than the width of the first part.
- the width of the first open portion corresponds to the width of the first part.
- the first part has a fourth thickness ranging from 20% to 90% of the first thickness of the first region.
- the outer surface of the second part has a straight slope whose width gradually decreases toward the upper surface of the second part.
- the outer surface of the second part has a curve of a specific curvature whose width decreases toward the upper surface of the second part.
- the width of the portion of the second part closest to the first part is smaller than the width of the portion of the first part closest to the second part, and the first circuit pattern is formed between the first part and the first part. It includes a step provided between the second parts.
- the outer surface of the second part has an inclination in which the width decreases toward the upper surface of the second part or an inclination in which the width does not change as it approaches the upper surface of the second part.
- the second part includes a first sub-part having an outer surface having a first inclination, and a second sub-part having an outer surface having a second inclination different from the first inclination.
- the first protective layer is provided at a boundary between the first area and the second area and includes a depression formed in an inner direction of the first protective layer.
- the circuit board further includes a surface treatment layer disposed on the first circuit board, and the lowermost end of the surface treatment layer is located lower than the top surface of the first region.
- the surface treatment layer is in contact with the second inner surface of the first region.
- the surface roughness of the outer surface of the first part is different from the surface roughness of the outer surface of the second part.
- a semiconductor package includes an insulating layer; a first circuit pattern disposed on the insulating layer; a first protective layer disposed on the insulating layer and including a first open portion vertically overlapping the first circuit pattern; a first connection portion disposed on the first circuit pattern vertically overlapping the first open portion of the first protective layer; and a semiconductor device mounted on the first connection portion, wherein the first protective layer includes the first open portion, a first region having a first thickness, and does not include the first open portion, and a second region having a second thickness greater than the first thickness, wherein the first thickness of the first region is smaller than a third thickness of the first circuit pattern, and the first area constituting the first open portion.
- a crevice is formed between the inner surface of area 1 and the outer surface of the first circuit pattern, and at least a portion of the first connection part is disposed within the crevice.
- the first protective layer is provided at a boundary between the first area and the second area and includes a recessed portion in the inner direction of the first protective layer, and at least a portion of the first connection portion is It is placed within the depression.
- the embodiment includes a first protective layer including an insulating layer, a first circuit pattern disposed on the insulating layer, and a first open portion disposed on the insulating layer and vertically overlapping the first circuit pattern.
- the first protective layer includes the first open portion and includes a first area adjacent to the first open portion. Additionally, the first protective layer includes a second region adjacent to the first region. At this time, the height of the top surface of the first area is lower than the height of the top surface of the second area. Preferably, the height of the top surface of the first area is lower than the height of the top surface of the first circuit pattern.
- the embodiment arranges the first protective layer including the first area and the second area having the first open portion in an area where the protective layer is not disposed due to the exposure resolution of the protective layer. Additionally, the first area includes a first open portion having substantially the same width as the first circuit pattern, and is arranged to surround the first circuit pattern.
- the embodiment can stably protect the first circuit pattern from damage caused by various stresses. Through this, the embodiment can improve the physical reliability and/or electrical reliability of the first circuit pattern.
- a crevice may be formed between the inner surface of the first region of the first protective layer and the outer surface of the first circuit pattern.
- the inner surface of the first area is a first inner surface in contact with the outer surface of the first circuit pattern and an outer surface of the first circuit pattern through the crevice without contacting the outer surface of the first circuit pattern. It includes a second inner surface spaced apart from the side.
- the embodiment allows a surface treatment layer and/or solder to be disposed within the crevice.
- the embodiment can increase the distance between the metal bonding layer formed by disposing the solder and the uppermost surface of the first protective layer. Accordingly, the embodiment can dramatically reduce the possibility of cracks occurring in the metal bonding layer and thereby improve the physical reliability and/or electrical reliability of the circuit board and semiconductor package.
- the embodiment may increase the distance using the crevice without increasing the thickness of the first protective layer. Accordingly, the embodiment can implement slimming of circuit boards and semiconductor packages.
- the outer surface of the first circuit pattern includes a first outer surface that is in contact with the outer surface of the first region of the first protective layer, and a second outer surface that is not in contact with the first protective layer. Additionally, the surface roughness of the second outer surface may be greater than the surface roughness of the first outer surface.
- the embodiment adjusts the thickness of the first region so that a depression in the inward direction is formed at the boundary between the first region and the second region.
- the recess may be filled with a connection such as solder in a solder bonding process.
- the connection part disposed in the recess can function as an anchor, and through this, bonding strength between the connection part and the first circuit pattern can be improved.
- FIG. 1 is a diagram showing a circuit board according to a comparative example.
- FIG. 2 is a diagram for explaining the reliability problem of the metal bonding layer (IMC) in the comparative example of FIG. 1.
- Figure 3 is a cross-sectional view showing a circuit board according to an embodiment.
- FIG. 4 is a plan view showing a first circuit pattern provided on the circuit board of FIG. 3.
- Figure 5 is a cross-sectional view showing a first open portion and a first circuit pattern of the first protective layer according to the first embodiment.
- FIG. 6 is a cross-sectional view of a surface treatment layer disposed on the first circuit pattern of FIG. 5.
- Figure 7 is a cross-sectional view showing a second open portion and a second circuit pattern of the first protective layer according to an embodiment.
- Figure 8 is a diagram showing a circuit board according to a second embodiment.
- Figure 9 is a diagram showing a circuit board according to a third embodiment.
- Figure 10 is a diagram showing a circuit board according to a fourth embodiment.
- Figure 11 is a diagram showing a circuit board according to the fifth embodiment.
- Figure 12 is a cross-sectional view showing a semiconductor package according to an embodiment.
- 13 to 18 are cross-sectional views showing a circuit board manufacturing method according to an embodiment in manufacturing process order.
- FIG. 1 is a diagram showing a circuit board according to a comparative example
- FIG. 2 is a diagram illustrating the reliability problem of the metal bonding layer (IMC) in the comparative example of FIG. 1.
- IMC metal bonding layer
- the circuit board according to the comparative example includes an insulating layer 10, a circuit pattern layer 20, a protective layer 30, a surface treatment layer 40, and solder 50.
- the circuit board in the comparative example has a structure in which solder 50 is disposed on the circuit pattern layer 20 to attach a chip (not shown) or an external board (not shown).
- the circuit board of the comparative example includes an insulating layer (10). Additionally, the circuit board of the comparative example includes a circuit pattern layer 20 disposed on the insulating layer 10.
- the circuit pattern layer 20 includes pads and traces.
- the pad refers to an electrode pattern on which solder 50 is disposed for bonding to the chip or an external substrate among the circuit pattern layers.
- the trace may refer to a thin signal line connecting the plurality of pads.
- the circuit board of the comparative example includes a protective layer 30 disposed on the insulating layer 10.
- the protective layer 30 includes an opening. Specifically, the protective layer 30 partially exposes the upper surface of the pad on which the solder 50 is to be placed among the circuit pattern layer 20. For example, the opening of the protective layer 30 provides a space for the solder 50 to be placed.
- a surface treatment layer 40 is disposed within the opening of the protective layer 30.
- the surface treatment layer 40 is disposed on the circuit pattern layer 20 that vertically overlaps the opening of the protective layer 30.
- the surface treatment layer 40 may have a certain thickness.
- solder 50 is disposed on the surface treatment layer 40, filling the opening of the protective layer 30.
- the surface treatment layer 40 and the solder 50 are made of different materials, and a metal bonding layer (IMC) is formed at the interface between the surface treatment layer 40 and the solder 50.
- IMC metal bonding layer
- the upper surface of the protective layer 30 in the comparative example is located adjacent to the metal bonding layer (IMC).
- the protective layer 30 shrinks and expands due to thermal stress in the circuit board's use environment. And the contraction and expansion are transmitted to the metal bonding layer (IMC) along the upper surface of the protective layer 30 and the inner wall of the opening.
- the circuit board undergoes a process of bonding a chip or a main board of an external device to the solder 50 and forming a molding layer (not shown) for molding the chip or the main board accordingly.
- the forming process of the molding layer is performed by injecting molding liquid onto the protective layer 30.
- a certain pressure is applied to inject the molding liquid, and the applied pressure is transmitted to the metal bonding layer (IMC) along the inner wall of the opening of the protective layer 30. .
- the upper surface of the protective layer 30 and the metal bonding layer (IMC) are located adjacent to each other, and accordingly, the generated stress or pressure is directly transmitted to the metal bonding layer (IMC).
- the solder 50 when the solder 50 is separated from the surface treatment layer 40, the chip or main board connected to the solder 50 is also separated from the circuit board, resulting in a problem with product reliability.
- the functions provided by semiconductor devices disposed on the circuit board are increasing, and as a result, the number of semiconductor devices disposed on the circuit board or the number of terminals provided on the semiconductor devices is increasing.
- the circuit pattern layer is required to be miniaturized for mounting the semiconductor device.
- the size of the opening that can be formed in the protective layer 30 is determined by the exposure resolution of the protective layer 30.
- the minimum size of the opening that can generally be formed is about 50 ⁇ m.
- the protective layer is not disposed on the pad connected to the semiconductor device, thereby realizing miniaturization of the pad.
- traces disposed in areas where the protective layer is not disposed are not protected by the protective layer, resulting in problems with physical reliability and/or electrical reliability.
- the embodiment solves the physical reliability problem of the circuit board of the comparative example. Specifically, the embodiment increases the distance between the top surface of the protective layer and the metal bonding layer (IMC) without increasing the thickness of the circuit board. Specifically, in the embodiment, the distance between the inner wall of the opening of the protective layer connecting the upper surface of the protective layer and the metal bonding layer (IMC) can be increased.
- the embodiment makes it possible to stably protect the metal bonding layer (IMC) from the generated stress or pressure and thereby improve the physical reliability of the metal bonding layer (IMC). Through this, the embodiment allows to improve the physical reliability of the metal bonding layer.
- the embodiment miniaturizes the pad connected to the semiconductor device and forms a protective layer including an opening that vertically overlaps the pad. Through this, the embodiment enables stable protection of pads or traces placed in the mounting area of the semiconductor device.
- the electronic device includes a main board (not shown).
- the main board may be physically and/or electrically connected to various components.
- the main board may be connected to the semiconductor package of the embodiment.
- Various semiconductor devices may be mounted on the semiconductor package.
- the semiconductor device may include active devices and/or passive devices. Active devices may be semiconductor chips in the form of integrated circuits (ICs) in which hundreds to millions of devices are integrated into one chip.
- Semiconductor chips may be logic chips, memory chips, etc.
- the logic chip may be a central processor (CPU), a graphics processor (GPU), or the like.
- the logic chip is an AP that includes at least one of a central processor (CPU), a graphics processor (GPU), a digital signal processor, a cryptographic processor, a microprocessor, and a microcontroller, or an analog-to-digital converter, an ASIC (application -specific IC), etc., or it may be a chip set containing a specific combination of those listed so far.
- the memory chip may be a stack memory such as HBM. Additionally, the memory chip may include memory chips such as volatile memory (eg, DRAM), non-volatile memory (eg, ROM), and flash memory.
- volatile memory eg, DRAM
- non-volatile memory eg, ROM
- flash memory e.g., NAND
- Chip Scale Package (CSP), Flip Chip-Chip Scale Package (FC-CSP), Flip Chip Ball Grid Array (FC-BGA), Package On Package (POP), and SIP ( System In Package), but is not limited to this.
- CSP Chip Scale Package
- FC-CSP Flip Chip-Chip Scale Package
- FC-BGA Flip Chip Ball Grid Array
- POP Package On Package
- SIP System In Package
- the electronic device may include a smart phone, a personal digital assistant, a digital video camera, a digital still camera, a network system, and a computer. ), monitor, tablet, laptop, netbook, television, video game, smart watch, automotive, etc.
- a smart phone a personal digital assistant
- a digital video camera a digital still camera
- a network system a network system
- a computer a computer.
- monitor tablet, laptop, netbook, television, video game, smart watch, automotive, etc.
- it is not limited to this, and of course, it can be any other electronic device that processes data.
- Circuit board refers to a board before semiconductor elements or chips are mounted.
- FIG. 3 is a cross-sectional view showing a circuit board according to an embodiment
- FIG. 4 is a plan view showing a first circuit pattern provided on the circuit board of FIG. 3
- FIG. 5 is a first view of the first protective layer according to the first embodiment. It is a cross-sectional view showing the open portion and the first circuit pattern
- FIG. 6 is a cross-sectional view of a surface treatment layer disposed on the first circuit pattern of FIG. 5
- FIG. 7 is a second open portion of the first protective layer according to an embodiment. This is a cross-sectional view showing a partial and second circuit pattern.
- the circuit board of the embodiment provides a mounting space where at least one semiconductor device can be mounted.
- the circuit board of the first embodiment may provide a mounting space for mounting one semiconductor device, and alternatively, may provide a plurality of mounting spaces for mounting two or more semiconductor devices.
- one logic chip may be mounted on the circuit board of the first embodiment. Additionally, at least two different types of logic chips may be mounted on the circuit board of the first embodiment. Additionally, at least one logic chip and at least one memory chip may be mounted on the circuit board of the first embodiment.
- the circuit board 100 of the first embodiment includes an insulating layer 110.
- the insulating layer 110 may have one or more layers.
- the insulating layer 110 may have a multilayer structure.
- the insulating layer 110 is shown in the drawing as consisting of one layer, it is not limited to this.
- the insulating layer 110 may include a plurality of insulating layers having a vertically stacked structure.
- the insulating layer 110 will be described by showing it as one layer.
- the insulating layer 110 may be rigid or flexible.
- the insulating layer 110 may include prepreg.
- the insulating layer 110 may be a prepreg in which glass fibers are impregnated with resin.
- the resin may be an epoxy resin, but is not limited thereto.
- the insulating layer 110 may include chemically strengthened/semi-strengthened glass such as soda lime glass or aluminosilicate glass.
- the insulating layer 110 includes reinforced or soft plastic such as polyimide (PI), polyethylene terephthalate (PET), propylene glycol (PPG), and polycarbonate (PC). can do.
- the insulating layer 110 may include sapphire.
- the insulating layer 110 may include an optically isotropic film.
- the insulating layer 110 may include Cyclic Olefin Copolymer (COC), Cyclic Olefin Polymer (COP), wide isotropic polycarbonate (PC), or wide isotropic polymethyl methacrylate (PMMA). .
- the insulating layer 110 may be formed of a material containing an inorganic filler and an insulating resin.
- the insulating layer 110 may have a structure in which an inorganic filler of silica or alumina is disposed on a thermosetting resin or thermoplastic resin.
- the insulating layer 110 may be made of Ajinomoto Build-up Film (ABF), FR-4, Bismaleimide Triazine (BT), Photo Imagable Dielectric Resin (PID), or BT.
- the insulating layer 110 may include resin coated copper (RCC).
- the insulating layer 110 may have a thickness ranging from 10 ⁇ m to 60 ⁇ m.
- the thickness of each of the plurality of layers may be within the range of 10 ⁇ m to 60 ⁇ m.
- the insulating layer 110 may satisfy a thickness ranging from 15 ⁇ m to 55 ⁇ m. More preferably, the insulating layer 110 may satisfy a thickness ranging from 18 ⁇ m to 52 ⁇ m.
- the thickness of the insulating layer 110 may refer to the vertical distance between a plurality of circuit pattern layers arranged adjacent to each other in the thickness direction.
- the thickness of the insulating layer 110 may refer to the vertical distance between the first circuit pattern layer 120 and the second circuit pattern layer 130.
- the thickness of the insulating layer 110 may refer to the vertical distance between the lower surface of the first circuit pattern layer 120 and the upper surface of the second circuit pattern layer 130.
- the thickness of the insulating layer 110 is less than 10 ⁇ m, the bending characteristics of the circuit board 100 may be reduced.
- the thickness of the insulating layer 110 is less than 10 ⁇ m
- the first circuit pattern layer 120 and the second circuit pattern layer 130 disposed on the surface of the insulating layer 110 are stably disposed. This may not be possible, and electrical reliability and/or physical reliability problems may occur accordingly.
- the thickness of the insulating layer 110 is less than 10 ⁇ m, the process characteristics in the process of forming the first circuit pattern layer 120 or the second circuit pattern layer 130 on the insulating layer 110 This may deteriorate.
- the thickness of the insulating layer 110 exceeds 60 ⁇ m, the overall thickness of the circuit board 100 may increase, and the thickness of the semiconductor package may accordingly increase. Additionally, if the thickness of the insulating layer 110 exceeds 60 ⁇ m, it may be difficult to miniaturize the first circuit pattern layer 120 and/or the second circuit pattern layer 130. For example, when the thickness of the insulating layer 110 exceeds 60 ⁇ m, the width of the first circuit pattern layer 120 and/or the second circuit pattern layer 130 and the gap between adjacent patterns are 12 ⁇ m. Below, it may be difficult to form it to 10 ⁇ m or less, 8 ⁇ m or less, or 6 ⁇ m or less. In addition, if it is difficult to miniaturize the first circuit pattern layer 120 and/or the second circuit pattern layer 130, the circuit integration may decrease, and signal transmission loss may increase as the signal transmission distance increases. there is.
- the circuit board 100 of the first embodiment includes a circuit pattern layer disposed on the insulating layer 110.
- the circuit board 100 of the first embodiment includes a first circuit pattern layer 120 disposed on the upper surface of the insulating layer 110. Additionally, the circuit board 100 includes a second circuit pattern layer 130 disposed on the lower surface of the insulating layer 110.
- the first circuit pattern layer 120 may be divided into a plurality of circuit patterns depending on location or function.
- the first circuit pattern layer 120 may include a first circuit pattern 120-1 and a second circuit pattern 120-2. At least one of the first circuit pattern 120-1 and the second circuit pattern 120-2 may be disposed in the semiconductor device mounting area of the circuit board 100.
- At least one of the first circuit pattern 120-1 and the second circuit pattern 120-2 may include a mounting pad connected to a terminal of a semiconductor device.
- At least one of the first circuit pattern 120-1 and the second circuit pattern 120-2 may include a terminal pad coupled to an external substrate.
- the interposer may be an active interposer including a semiconductor device function.
- the interposer may be a passive interposer that relays signals between a plurality of components.
- the first circuit pattern 120-1 and the second circuit pattern 120-2 may be distinguished from each other by their widths.
- the first circuit pattern 120-1 may have a width relatively smaller than the width of the second circuit pattern 120-2.
- the first circuit pattern 120-1 may include a mounting pad connected to a terminal of a semiconductor device.
- the second circuit pattern 120-2 may include a terminal pad connected to an external board, etc. Accordingly, the first circuit pattern 120-1 may be a fine pattern corresponding to the terminal of the semiconductor device.
- the first circuit pattern 120-1 of the first circuit pattern layer 120 is required to be refined.
- the comparative example there is a limit to miniaturizing the first circuit pattern 120-1 of the first circuit pattern layer 120 due to size limitations of the open portion of the protective layer, undercut, and reliability problems of the metal bonding layer. there was. That is, when the first circuit pattern 120-1 is miniaturized, an open portion of a size corresponding to the width of the first circuit pattern 120-1 cannot be formed, or a plurality of adjacent adjacent parts cannot be formed due to the undercut. There is a problem that the patterns are connected to each other by solder, or the reliability of the metal bonding layer is further reduced.
- circuit integration can be improved.
- gap between the plurality of patterns decreases, a problem may occur in which open portions corresponding to the plurality of patterns cannot be formed in the first protective layer 150.
- the bonding area of the metal bonding layer decreases, thereby reducing the physical reliability of the metal bonding layer. It may deteriorate further.
- the first protective layer 150 includes an open portion and the upper surface of the first protective layer 150 has a stepped structure.
- the embodiment increases the distance between the top surface of the first protective layer 150 and the first circuit pattern 120-1 as much as possible.
- the distance between the top surface of the first protective layer 150 and the first circuit pattern 120-1 must be increased.
- the thickness of the first protective layer 150 may be increased.
- the thickness of the first protective layer 150 increases, the thickness of the circuit board increases accordingly, and the overall thickness of the semiconductor package accordingly increases.
- the first protective layer is provided between the first protective layer 150 and the first circuit pattern 120-1 without increasing the thickness of the first protective layer 150. Increase the length of the inner wall of the open part of 150.
- the first circuit pattern layer 120 is the insulating layer disposed on the uppermost side among the plurality of layers of the insulating layer 110. It may be disposed on the upper surface, and the second circuit pattern layer 130 may be disposed on the lower surface of the insulating layer disposed on the lowest side among the plurality of layers of the insulating layer 110.
- the first circuit pattern layer 120 and the second circuit pattern layer 130 may represent an outer circuit pattern layer, but are not limited thereto.
- an additional inner circuit pattern layer may be disposed between the plurality of layers.
- the first circuit pattern 120-1 is disposed in an area where semiconductor devices such as logic chips are mounted. Accordingly, the first circuit pattern 120-1 may include a fine pattern.
- Figure 4 (a) is a plan view showing the first circuit pattern 120-1 in the state in which the first protective layer 150 of the embodiment has been removed
- Figure 4 (b) is a plan view showing the line A-A of Figure 4 (a). ' It is a cross-sectional view along the direction.
- the first circuit pattern 120-1 includes a pad 120-11 corresponding to a terminal of a semiconductor device or a pad of an interposer, and a trace 120-12 connected to the pad 120-11.
- the first circuit pattern 120-1 requires miniaturization.
- the first circuit pattern 120-1 must be connected to all terminals of a semiconductor device or all pads of an interposer within a limited space, and traces connecting them must be placed.
- the first circuit pattern 120-1 may include a fine pattern.
- the number of terminals in the first processor chip and the second processor chip is gradually increasing. Accordingly, one semiconductor device cannot provide all functions, or the number of terminals provided in one semiconductor device is increasing.
- the first circuit pattern 120-1 may be required to be ultra-fine.
- Pads 120-11 of the first circuit pattern 120-1 correspond to terminals of semiconductor devices to be mounted on the circuit board. Accordingly, the number of pads 120-11 corresponds to the number of terminals of the semiconductor device.
- the pad 120-11 may have a different width in a first horizontal direction and a width in a second horizontal direction perpendicular to the first horizontal direction. At this time, the width of the pad 120-11 in the direction of separation from the neighboring pad or trace may be smaller than the width in the direction perpendicular to the direction of separation. And among the widths of the pads 120-11, the width in the separation direction has a great influence on circuit integration.
- the separation direction may mean the first horizontal direction.
- the pad 120-11 may have an oval shape whose width in the first horizontal direction is smaller than the width in the second horizontal direction.
- the embodiment is not limited to this.
- the pad 120-11 may have an overall circular shape with a width in the first horizontal direction.
- the width W1 of the pad 120-11 may be 3 ⁇ m to 30 ⁇ m.
- the width W1 of the pad 120-11 may be 4 ⁇ m to 28 ⁇ m.
- the width W1 of the pad 120-11 may be 5 ⁇ m to 25 ⁇ m.
- the width W1 of the pad 120-11 is less than 3 ⁇ m, it may be difficult to arrange a connection portion connected to the terminal of the semiconductor device. If the width W1 of the pad 120-11 is less than 3 ⁇ m, the connection reliability between the pad 120-11 and the semiconductor device may be reduced. If the width W1 of the pad 120-11 is greater than 30 ⁇ m, it may be difficult to place all pads connected to the semiconductor device within a limited space. If the width W1 of the pad 120-11 is greater than 30 ⁇ m, the size of the circuit board may increase. If the width W1 of the pad 120-11 is greater than 30 ⁇ m, the gap between neighboring patterns becomes narrow, which may cause reliability problems such as circuit short.
- the first circuit pattern 120-1 includes a trace 120-12 connected to the pad 120-11.
- the trace 120-12 may represent a thin and long signal line connected to the pad 120-11. Additionally, when two semiconductor devices are mounted on the first circuit pattern 120-1, the trace 120-12 may include a signal line connecting the two semiconductors.
- the trace 120-12 may include an ultra-fine pattern.
- the line width W2 of the trace 120-12 may satisfy the range of 1 ⁇ m to 10 ⁇ m.
- the line width W2 of the trace 120-12 may satisfy the range of 1.2 ⁇ m to 8 ⁇ m.
- the line width W2 of the trace 120-12 may satisfy the range of 1.5 ⁇ m to 7 ⁇ m. If the line width W2 of the trace 120-12 is less than 1 ⁇ m, the resistance of the trace 120-12 increases, which may make normal communication with the semiconductor device difficult. Additionally, if the line width W2 of the trace 120-12 is smaller than 1 ⁇ m, it may be difficult to apply a general circuit pattern manufacturing process.
- the line width W2 of the trace 120-12 is less than 1 ⁇ m, a physical reliability problem may occur in which the trace 120-12 collapses due to stress caused by various factors. If the line width W2 of the trace 120-12 is greater than 10 ⁇ m, it may be difficult to place all signal lines connected to the terminals of the semiconductor device within a limited space. For example, if the line width W2 of the trace 120-12 is greater than 10 ⁇ m, it may be difficult to place all traces for connecting a plurality of processor chips within a limited space. For example, if the line width W2 of the trace 120-12 is greater than 10 ⁇ m, circuit integration may be reduced.
- the first circuit patterns 120-1 may be spaced apart from each other by a certain distance W3.
- the gap W3 may mean the spacing between the pads 120-11 of the first circuit pattern 120-1. Additionally, the gap W3 may mean the spacing between traces of the first circuit pattern 120-1. Additionally, the gap W3 may refer to the separation distance between adjacent pads 120-11 and traces 120-12 of the first circuit pattern 120-1.
- the gap W3 may range from 1 ⁇ m to 10 ⁇ m.
- the gap W3 may range from 1.2 ⁇ m to 8 ⁇ m.
- the gap W3 may range from 1.5 ⁇ m to 7 ⁇ m. If the gap W3 is less than 1 ⁇ m, there is a problem in that adjacent traces or pads are connected to each other, resulting in an electrical short. For example, if the gap W3 is greater than 10 ⁇ m, it may be difficult to place all traces for connecting a plurality of processor chips within a limited space.
- the circuit board 100 of the first embodiment may include a through electrode 140.
- the penetrating electrode 140 may penetrate the insulating layer 110.
- the through electrode 140 may penetrate the insulating layer 110 to electrically connect the first circuit pattern layer 120 and the second circuit pattern layer 130.
- the through electrodes 140 can be spaced apart in the vertical direction and electrically connect adjacent circuit pattern layers.
- the first circuit pattern layer 120 and the second circuit pattern layer 130 are wires that transmit electrical signals, and may be formed of a metal material with high electrical conductivity.
- the first circuit pattern layer 120 and the second circuit pattern layer 130 are gold (Au), silver (Ag), platinum (Pt), titanium (Ti), tin (Sn), and copper (Cu). ) and zinc (Zn).
- the first circuit pattern layer 120 and the second circuit pattern layer 130 are made of gold (Au), silver (Ag), platinum (Pt), titanium (Ti), tin (Sn), etc., which have excellent bonding strength. It may be formed of a paste or solder paste containing at least one metal material selected from copper (Cu) and zinc (Zn).
- the first circuit pattern layer 120 and the second circuit pattern layer 130 may be formed of copper (Cu), which has high electrical conductivity and is relatively inexpensive.
- the first circuit pattern layer 120 and the second circuit pattern layer 130 are manufactured using typical printed circuit board manufacturing processes such as the additive process, subtractive process, and MSAP (Modified Semi Additive Process). Process) and SAP (Semi Additive Process) methods, etc., and detailed explanations are omitted here.
- the thickness (T1, see FIG. 5) of the first circuit pattern layer 120 may satisfy the range of 5 ⁇ m to 30 ⁇ m.
- the thickness T1 of the first circuit pattern layer 120 may satisfy the range of 6 ⁇ m to 25 ⁇ m.
- the thickness T1 of the first circuit pattern layer 120 may have a thickness in the range of 7 ⁇ m to 20 ⁇ m.
- the thickness T1 of the first circuit pattern layer 120 may refer to the vertical distance from the lower surface to the upper surface of the first circuit pattern layer 120.
- the thickness T1 of the first circuit pattern layer 120 is from the bottom to the top of the first circuit pattern layer 120. It can mean the vertical distance of .
- the embodiment is not limited to this.
- the thickness T1 of the first circuit pattern layer 120 may mean the average thickness over the entire area.
- the thickness T1 of the first circuit pattern layer 120 When the thickness T1 of the first circuit pattern layer 120 is less than 5 ⁇ m, the resistance of the circuit pattern increases, and signal transmission efficiency may decrease accordingly. For example, when the thickness T1 of the first circuit pattern layer 120 is less than 5 ⁇ m, signal transmission loss may increase. For example, when the thickness T1 of the first circuit pattern layer 120 exceeds 30 ⁇ m, the line width of the first circuit pattern layer 120 increases, and the circuit integration degree may decrease accordingly. .
- the thickness of the second circuit pattern layer 130 may correspond to the thickness T1 of the first circuit pattern layer 120.
- the through electrode 140 can be formed by filling the inside of a through hole penetrating the insulating layer 110 with a conductive material.
- the through hole may be formed by any one of mechanical, laser, and chemical processing.
- methods such as milling, drilling, and routing can be used.
- laser processing UV or CO 2 laser methods can be used.
- chemical processing chemicals containing aminosilanes, ketones, etc. can be used.
- the circuit board 100 of the first embodiment may include a protective layer.
- the circuit board 100 may include a first protective layer 150 disposed on the insulating layer 110.
- the circuit board 100 may include a second protective layer 160 disposed under the insulating layer 110 .
- the first protective layer 150 and the second protective layer 160 may be resist layers.
- the first protective layer 150 and the second protective layer 160 may be a solder resist layer containing an organic polymer material.
- the first protective layer 150 and the second protective layer 160 may include an epoxy acrylate-based resin.
- the first protective layer 150 and the second protective layer 160 may include resin, hardener, pigment, solvent, filler, additive, acrylic monomer, etc.
- Each thickness of the first protective layer 150 and the second protective layer 160 may be greater than each thickness of the first circuit pattern layer 120 and the second circuit pattern layer 130.
- the thickness of the first protective layer 150 may be greater than the thickness of the first circuit pattern layer. Additionally, the thickness of the second protective layer 160 may be greater than the thickness of the second circuit pattern layer 130.
- the thickness of the first protective layer 150 may mean the vertical distance from the lower surface to the upper surface of the first protective layer 150 in the area that does not include the open portion of the first protective layer 150. .
- the thickness of the first protective layer 150 may refer to the thickness (T4, see FIG. 5) in the second region (R2, see FIG. 5) of the first protective layer 150.
- the thickness T4 of the first protective layer 150 may satisfy the range of 6.7 ⁇ m to 35.0 ⁇ m.
- the thickness T1 of the first protective layer 150 may satisfy the range of 7.3 ⁇ m to 32 ⁇ m. More preferably, the thickness T1 of the first protective layer 150 may satisfy the range of 8.0 ⁇ m to 30 ⁇ m.
- the thickness of the first protective layer 150 exceeds 30 ⁇ m, the thickness of the circuit board and the thickness of the semiconductor package may increase. Additionally, if the thickness of the first protective layer 150 is less than 6.7 ⁇ m, the first circuit pattern layer may not be stably protected, and as a result, electrical reliability or physical reliability may be reduced.
- the second protective layer 160 may have a thickness corresponding to the thickness of the first protective layer 150, but is not limited thereto.
- the first protective layer 150 includes at least one open portion. Additionally, the second protective layer 160 includes at least one open portion.
- the first protective layer 150 may include a first open portion OP1.
- the first protective layer 150 may include a first open portion OP1 that vertically overlaps the first circuit pattern 120-1.
- the first protective layer 150 may include a second open portion OP2.
- the first protective layer 150 may include a second open portion OP2 that vertically overlaps the second circuit pattern 120-2.
- the second protective layer 160 may include at least one third open portion that vertically overlaps the second circuit pattern layer 130.
- the first protective layer 150 may be divided into a plurality of regions.
- the first protective layer 150 may include a first region R1 including the first open portion OP1. Additionally, the first protective layer 150 may include a second region (R2) adjacent to the first region (R1) without including the first open portion (OP1).
- the first protective layer 150 may include a third region R3 including the second open portion OP2. Additionally, the first protective layer 150 may include a fourth region (R4) adjacent to the third region (R3) without including the second open portion (OP2).
- the second area (R2) and the fourth area (R4) are areas that do not include the first open part (OP1) and the second open part (OP2). Additionally, the second region R2 and the fourth region R4 of the first protective layer 150 may form one region connected to each other. Accordingly, the partial region of the first protective layer 150 may mean either the second region (R2) or the fourth region (R4), and differently from the second region (R2) or the fourth region (R4). ) may mean both.
- first open portion OP1 and the second open portion OP2 formed in the first protective layer 150, the first circuit pattern 120-1 and the second circuit pattern 120-2. )'s shape will be explained in detail.
- the first protective layer 150 includes a first open portion OP1.
- the first open portion OP1 may correspond to the first circuit pattern 120-1.
- the first protective layer 150 may include the first open portion OP1 that vertically overlaps the first circuit pattern 120-1.
- the first open portion OP1 may refer to a region exposing the top surface of the first circuit pattern 120-1 in the first region R1 of the first protective layer 150.
- the first open portion OP1 may mean a region that vertically overlaps the first circuit pattern 1201 in the first region R1 of the first protective layer 150.
- the thickness T3 of the first region R1 of the first protective layer 150 is smaller than the thickness T1 of the first circuit pattern 120-1.
- the first open portion OP1 is in the area where the first circuit pattern 120-1 is disposed, and the first protective layer 150 is disposed by the first circuit pattern 120-1. It may mean an area that is not covered.
- the width of the first open portion OP1 of the first protective layer 150 may correspond to the width of the first circuit pattern 120-1.
- corresponding means that the difference between the width of the first open portion OP1 of the first protective layer 150 and the width of the first circuit pattern 120-1 is 2 ⁇ m or less, 1.5 ⁇ m or less, or 1.0 ⁇ m or less. , may mean 0.8 ⁇ m or less, or 0.5 ⁇ m or less.
- the first protective layer 150 covers the upper surface of the first circuit pattern 120-1 and has a thickness less than that of the first circuit pattern 120-1. ) is formed by thinning.
- the thinned area may be referred to as the first area R1 of the first protective layer 150.
- the region where the circuit pattern 120-1 is disposed is It can be called the first open part (OP1). Accordingly, the width of the first open portion OP1 of the first protective layer 150 may be the same as the width of the first circuit pattern 120-1.
- the width of the first open portion OP1 of the first protective layer 150 may be the same as the width of the lower surface of the first circuit pattern 120-1. Accordingly, the first protective layer 150 may be disposed to include the first open portion OP1 and cover a portion of the side surface of the first circuit pattern 120-1.
- the first protective layer 150 may be divided into a plurality of regions based on the position where the first open portion OP1 is formed.
- the first protective layer 150 includes the first open portion OP1 and includes a first region R1 adjacent to the first open portion OP1. Additionally, the first protective layer 150 may include a second region R2 adjacent to the first region R1 and having a step difference from the first region R1.
- the first region R1 of the first protective layer 150 includes a first open portion OP1 that vertically overlaps the first circuit pattern 120-1.
- the first region R1 of the first protective layer 150 includes a first open portion OP1 that is equal to the width of the lower surface of the first circuit pattern 120-1.
- the height of the top surface of the first region R1 of the first protective layer 150 is different from the height of the top surface of the second region R2.
- the thickness T3 of the first region R1 of the first protective layer 150 is smaller than the thickness T4 of the second region R2 of the first protective layer 150.
- the thickness T3 of the first region R1 of the first protective layer 150 may be determined based on the thickness T1 of the first circuit pattern 120-1. Preferably, the thickness T3 of the first region R1 of the first protective layer 150 is smaller than the thickness T1 of the first circuit pattern 120-1.
- the thickness T3 of the first region R1 of the first protective layer 150 ranges from 20% to 90% of the thickness T1 of the first circuit pattern 120-1. You can be satisfied. Preferably, the thickness T3 of the first region R1 of the first protective layer 150 satisfies the range of 25% to 85% of the thickness T1 of the first circuit pattern 120-1. You can. More preferably, the thickness T3 of the first region R1 of the first protective layer 150 is in the range of 27% to 83% of the thickness T1 of the first circuit pattern 120-1. You can be satisfied.
- the first circuit pattern 120-1 -1) The physical and/or electrical reliability may be reduced.
- the first region R1 of the first protective layer 150 includes the pad 120-11 and/or trace 120-12 of the first circuit pattern 120-1, which is a fine pattern. It can perform a supporting function. And, if the thickness T3 of the first region R1 of the first protective layer 150 is less than 20% of the thickness T1 of the first circuit pattern 120-1, the support function The effect may be minimal.
- the first circuit pattern 120-1 Residual resin of the first protective layer 150 may exist on a portion of the upper surface of (120-1). Additionally, if residual resin of the first protective layer 150 exists on the upper surface of the first circuit pattern 120-1, the electrical reliability of the first circuit pattern 120-1 may be reduced.
- the first region R1 of the first protective layer 150 is disposed to cover a portion of the side surface of the first circuit pattern 120-1.
- the first circuit pattern 120-1 may include a region whose width changes as it moves toward the upper surface.
- the first circuit pattern 120-1 may include a region whose width decreases toward the top of the first circuit pattern 120-1.
- the position where the width begins to decrease may be located lower than the upper surface of the first region R1 of the first protective layer 150.
- the inner surface of the first region R1 of the first protective layer 150 (preferably, the sidewall of the first open portion OP1 formed in the first region R1) is It may not contact the side of the first circuit pattern 120-1.
- a crevice may be formed between the inner surface of the first region R1 of the first protective layer 150 and the outer surface of the first circuit pattern 120-1.
- the inner surface of the first region R1 of the first protective layer 150 is adjacent to the lower surface of the first region R1 of the first protective layer 150 and the first circuit pattern ( It may include a first inner surface in contact with the outer surface of 120-1).
- the inner surface of the first region R1 of the first protective layer 150 is adjacent to the upper surface of the first region R1 of the first protective layer 150, and the first circuit pattern ( It may include a second inner surface that is not in contact with or is spaced apart from the outer surface of 120-1). Additionally, the crevice may be provided between the outer surface of the first circuit pattern 120-1 and the second inner surface of the first region R1 of the first protective layer 150.
- the crevice is not formed by the second inner surface of the first region R1 of the first protective layer 150, but by the outer surface of the first circuit pattern 120-1. It can be formed by the side.
- the crevice may be provided by at least a portion of the outer surface of the first circuit pattern 120-1 being shaved inward.
- the embodiment is not limited to this.
- the crevice may be formed by cutting the second inner surface of the first region R1 of the first protective layer 150 in the inward direction, or may be formed by a combination thereof. It could be.
- crevice will be described as being formed by cutting a portion of the outer surface of the first circuit pattern 120-1 in the inward direction.
- the first inner surface and the second inner surface of the first region R1 of the first protective layer 150 are connected to each other.
- the slope of the first inner surface of the first region R1 of the first protective layer 150 may correspond to the slope of the second inner surface.
- the first and second inner surfaces of the first region R1 of the first protective layer 150 are relative to the lower surface of the first region R1 of the first protective layer 150. It can have a vertical slope.
- the first circuit pattern 120-1 may be divided into a plurality of parts in the thickness direction.
- the pad 120-11 and/or the trace 120-12 of the first circuit pattern 120-1 may be divided into a plurality of parts in the thickness direction.
- the first circuit pattern 120-1 may include a first part 120-1a adjacent to the top surface of the insulating layer 110.
- the width of the upper surface of the first part 120-1a of the first circuit pattern 120-1 may correspond to the width of the lower surface of the first part 120-1a.
- corresponding means that the difference in width between the upper and lower surfaces of the first part 120-1a of the first circuit pattern 120-1 is 2 ⁇ m or less, 1.5 ⁇ m or less, 1.0 ⁇ m or less, and 0.8 ⁇ m or less. , or it may mean 0.5 ⁇ m or less.
- the width of the first part 120-1a of the first circuit pattern 120-1 is the width of the first open portion OP1 formed in the first region R1 of the first protective layer 150. can respond.
- the width of the first part 120-1a of the first circuit pattern 120-1 may be the same as the width of the first open portion OP1.
- the outer surface 120-1as of the first part 120-1a of the first circuit pattern 120-1 may directly contact the first protective layer 150.
- the outer surface 120-1as of the first part 120-1a of the first circuit pattern 120-1 is the upper surface of the first region R1 of the first protective layer 150. It may be in direct contact with the first inner surface.
- the outer surface 120-1as of the first part 120-1a of the first circuit pattern 120-1 is the first inner surface of the first region R1 of the first protective layer 150. It may have a slope corresponding to the slope of the side.
- the outer surface of the first part 120-1a of the first circuit pattern 120-1 may be perpendicular to the lower surface of the first circuit pattern 120-1, but is limited thereto. That is not the case.
- the top of the first part 120-1a of the first circuit pattern 120-1 may be located lower than the top surface of the first region R1 of the first protective layer 150.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is the thickness T3 of the first region R1 of the first protective layer 150. It can be smaller than
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is equal to the thickness T3 of the first region R1 of the first protective layer 150.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is the thickness T3 of the first region R1 of the first protective layer 150.
- a range of 20% to 90% of can be satisfied.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is equal to the thickness T3 of the first region R1 of the first protective layer 150.
- a range of 25% to 85% of can be satisfied.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is equal to the thickness T3 of the first region R1 of the first protective layer 150.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is 20% of the thickness T3 of the first region R1 of the first protective layer 150. If it is less than that, the contact area between the outer surface of the first circuit pattern 120-1 and the inner surface of the first region R1 of the first protective layer 150 decreases, and thus the first circuit pattern The physical reliability and/or electrical reliability of (120-1) may be reduced. In addition, the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is greater than the thickness T3 of the first region R1 of the first protective layer 150. If it is less than 20%, the depth of the crevice increases, which may reduce the physical reliability of the connection portion disposed on the first circuit pattern 120-1.
- the thickness deviation of the connection portion increases, and thus the packaging process of the semiconductor device may deteriorate.
- the amount of application to the connection portion increases, and the rigidity of the connection portion may decrease accordingly.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is greater than the thickness T3 of the first region R1 of the first protective layer 150. If it exceeds 90%, the depth of the crevice decreases, and the effect produced by the crevice may be insignificant.
- the crevice is located at the bottom of the surface treatment layer 170 (see FIG. 6) disposed on the first circuit pattern 120-1 and the second region R2 of the first protective layer 150. Formed to increase the distance between upper surfaces.
- the thickness T2 of the first part 120-1a of the first circuit pattern 120-1 is greater than the thickness T3 of the first region R1 of the first protective layer 150. If it exceeds 90%, the effect of increasing the distance is insufficient, and as a result, physical reliability problems such as cracks occurring in the metal bonding layer formed by arranging the connection portion may occur.
- the first circuit pattern 120-1 includes a second part 120-1b disposed on the first part 120-1a.
- the top surface of the second part 120-1b is positioned higher than the top surface of the first region R1 of the first protective layer 150. Additionally, the lower surface of the second part 120-1b is located lower than the upper surface of the first region R1 of the first protective layer 150.
- the second part 120-1b of the first circuit pattern 120-1 includes a region whose width changes.
- the width of the second part 120-1b of the first circuit pattern 120-1 may decrease as it moves away from the first part 120-1a.
- the second part 120-1b of the first circuit pattern 120-1 has an outer surface 120-1bs connected to the outer surface 120-1as of the first part 120-1a. ) includes.
- the outer surface 120-1bs of the second part 120-1b has a slope different from that of the outer surface 120-1as of the first part 120-1a.
- the outer surface 120-1as of the first part 120-1a may have an inclination without change in width.
- outer surface 120-1bs of the second part 120-1b may have a slope whose width gradually decreases as it moves away from the first part 120-1a.
- the outer surface 120-1bs of the second part 120-1b may be a straight line with a specific slope whose width gradually decreases.
- the outer surface 120-1bs of the second part 120-1b is shown as a straight line with a specific slope, but it is not limited thereto.
- the outer surface 120-1bs of the second part 120-1b may have a specific curvature whose width decreases toward the upper surface.
- the outer surface 120-1bs of the second part 120-1b having the curvature may have a convex shape toward the first region R1 of the first protective layer 150, and Alternatively, it may have a concave shape toward the inside of the second pad 120-1b away from the first region R1 of the first protective layer 150.
- the outer surface 120-1bs of the second part 120-1b does not contact the first protective layer 150.
- the outer surface 120-1bs of the second part 120-1b does not contact the inner surface of the first region R1 of the first protective layer 150.
- the outer surface 120-1bs of the second part 120-1b is spaced apart from the inner surface of the first region R1 of the first protective layer 150.
- a crevice is formed between the outer surface 120-1bs of the second part 120-1b and the inner surface of the first region R1 of the first protective layer 150.
- the embodiment uses the crevices formed between the first circuit pattern 120-1 and the first protective layer 150 to improve the physical reliability and/or electrical reliability of the circuit board and the semiconductor package including the same. It can be improved.
- a surface treatment layer 170 is disposed on the first circuit pattern 120-1.
- the surface treatment layer 170 may be an organic solderability preservative (OSP).
- OSP organic solderability preservative
- the surface treatment layer 170 is disposed on the surface of the first circuit pattern 120-1.
- the surface treatment layer 170 is disposed on the surface of the circuit pattern 120-1 exposed through the first open portion OP1 of the first protective layer 150.
- the surface treatment layer 170 is disposed on the top and outer surfaces 120-1bs of the second part 120-1b of the first circuit pattern 120-1. Accordingly, the bottom of the surface treatment layer 170 is located within a crevice formed between the first circuit pattern 120-1 and the first region R1 of the first protective layer 150.
- the embodiment determines the distance or length of the sidewall of the first protective layer 150 between the upper surface of the second region R2 of the first protective layer 150 and the lowermost end of the surface treatment layer 170. can be increased. Accordingly, the embodiment can improve the physical reliability and/or electrical reliability of the metal bonding layer formed by disposing a connection part such as solder on the surface treatment layer 170.
- the crevices may be formed by pre-treating a portion of the top and outer surfaces of the first circuit pattern 120-1 in the process of forming the surface treatment layer 170.
- the top and outer surfaces 120-1bs of the second part 120-1b of the first circuit pattern 120-1 may be etched. Accordingly, a crevice due to the etching may be formed between the outer surface 120-1bs of the second part 120-1b and the inner surface of the first region R1 of the first protective layer 150. there is.
- the outer surface of the first circuit pattern 120-1 may have different roughness depending on the area.
- the outer surface 120-1as of the first part 120-1a of the first circuit pattern 120-1 may have a first surface roughness.
- the first surface roughness of the outer surface 120-1as of the first part 120-1a is the surface roughness of the inner surface of the first region R1 of the first protective layer 150 in contact with it. can respond.
- the outer surface 120-1bs of the second part 120-1b of the first circuit pattern 120-1 may have a second surface roughness that is different from the first surface roughness.
- the outer surface 120-1bs of the second part 120-1b of the first circuit pattern 120-1 is closer to the outer surface 120-1as of the first part 120-1a. It may have a second surface roughness that is greater than the first surface roughness.
- the embodiment can secure adhesion between the surface treatment layer 170 and the first circuit pattern 120-1, and thus the physical reliability and/or electrical reliability of the circuit board and the semiconductor package including the same. can be improved.
- the first protective layer 150 may include a depression 153.
- the recess 153 may be formed at the boundary between the first region R1 and the second region R2 of the first protective layer 150.
- the recess 153 may be formed at the boundary when the thickness T3 of the first region R1 of the first protective layer 150 decreases.
- the recess 153 may be formed at the boundary between the first region R1 and the second region R2 when the first protective layer 150 is not completely cured. there is.
- the horizontal length of the depression 153 can be minimized by adjusting the thickness T3 of the first region R1.
- the thickness T3 of the first region R1 is adjusted so that the recess 153 has a certain horizontal length and is provided at the boundary.
- the recess 153 may be filled with a connection such as solder in a later solder bonding process.
- the connection part disposed in the recess 153 may function as an anchor, and through this, bonding strength between the connection part and the first circuit pattern 120-1 can be improved.
- the first protective layer 150 includes a second open portion OP2.
- the second open part OP2 may have a different shape from the first open part OP1.
- the second open part OP2 may be an SMD type open part.
- the second open portion OP2 vertically overlaps the second circuit pattern 120-2.
- the second open portion OP2 partially vertically overlaps the upper surface of the second circuit pattern 120-2.
- a portion of the upper surface of the second circuit pattern 120-2 may be covered by the first protective layer 150, and the remaining portion may be exposed through the second open portion OP2.
- the first protective layer 150 may include the second open portion OP2 and a third region R3 adjacent to the second open portion OP2.
- the third area R3 may refer to an area that includes the second open portion OP2 and vertically overlaps the second circuit pattern 120-2.
- the first protective layer 150 may include a fourth region (R4) adjacent to the third region (R3).
- the top surface of the third region (R3) of the first protective layer 150 may have the same height as the top surface of the fourth region (R4).
- the top surface of the third region R3 of the first protective layer 150 may not have a level difference with the top surface of the fourth region R4.
- the top surface of the third region R3 of the first protective layer 150 may be located on the same plane as the top surface of the fourth region R4. That is, the second circuit pattern 120-2 is a larger-area pattern than the first circuit pattern 120-1. Accordingly, the reliability of the metal bonding layer can be maintained even though the second open portion OP2 vertically overlapping the second circuit pattern 120-2 does not have the same structure as the first open portion OP1. .
- the second circuit pattern 120-2 has a recess (not shown) by etching a portion of the upper surface of the second circuit pattern 120-2. 120-2R). Additionally, the width of the recess 120-2R in the horizontal direction may be larger than the width of the second open portion OP2. For example, a portion of the recess 120-2R vertically overlaps the second open portion OP2, and the remaining portion vertically overlaps the third region R3 of the first protective layer 150. overlapped with. Accordingly, a connection part such as a surface treatment layer or solder may penetrate into the recess 120-2R.
- the embodiment allows the surface treatment layer or connection part that has penetrated into the recess (120-2R) to function as an anchor, through which the gap between the second circuit pattern (120-2) and the surface treatment layer or solder is formed.
- the bonding strength can be further improved.
- the embodiment includes a first protective layer including an insulating layer, a first circuit pattern disposed on the insulating layer, and a first open portion disposed on the insulating layer and vertically overlapping the first circuit pattern.
- the first protective layer includes the first open portion and includes a first area adjacent to the first open portion. Additionally, the first protective layer includes a second region adjacent to the first region. At this time, the height of the top surface of the first area is lower than the height of the top surface of the second area. Preferably, the height of the top surface of the first area is lower than the height of the top surface of the first circuit pattern.
- the embodiment arranges the first protective layer including the first area and the second area having the first open portion in an area where the protective layer is not disposed due to the exposure resolution of the protective layer. Additionally, the first area includes a first open portion having substantially the same width as the first circuit pattern, and is arranged to surround the first circuit pattern.
- the embodiment can stably protect the first circuit pattern from damage caused by various stresses. Through this, the embodiment can improve the physical reliability and/or electrical reliability of the first circuit pattern.
- a crevice may be formed between the inner surface of the first region of the first protective layer and the outer surface of the first circuit pattern.
- the inner surface of the first area is a first inner surface in contact with the outer surface of the first circuit pattern and an outer surface of the first circuit pattern through the crevice without contacting the outer surface of the first circuit pattern. It includes a second inner surface spaced apart from the side.
- the embodiment allows a surface treatment layer and/or solder to be disposed within the crevice.
- the embodiment can increase the distance between the metal bonding layer formed by disposing the solder and the uppermost surface of the first protective layer. Accordingly, the embodiment can dramatically reduce the possibility of cracks occurring in the metal bonding layer and thereby improve the physical reliability and/or electrical reliability of the circuit board and semiconductor package.
- the embodiment may increase the distance using the crevice without increasing the thickness of the first protective layer. Accordingly, the embodiment can implement slimming of circuit boards and semiconductor packages.
- the outer surface of the first circuit pattern includes a first outer surface that is in contact with the outer surface of the first region of the first protective layer, and a second outer surface that is not in contact with the first protective layer. Additionally, the surface roughness of the second outer surface may be greater than the surface roughness of the first outer surface.
- the embodiment adjusts the thickness of the first region so that a depression in the inward direction is formed at the boundary between the first region and the second region.
- the recess may be filled with a connection such as solder in a solder bonding process.
- the connection part disposed in the recess can function as an anchor, and through this, bonding strength between the connection part and the first circuit pattern can be improved.
- the circuit board described below is similar to the embodiment of the first circuit board shown in FIG. 5 and may be different in the shape of the first circuit pattern. Therefore, the description of the circuit board of another embodiment below will focus on the shape of the first circuit pattern.
- Figure 8 is a diagram showing a circuit board according to a second embodiment.
- the circuit board of the second embodiment includes an insulating layer 210, a first circuit pattern 220-1, and a first protective layer 250.
- the first protective layer 250 includes a first open portion OP1.
- the first protective layer 250 includes the first open portion OP1 and a first region R1 adjacent to the first open portion OP1.
- the first protective layer 250 may include a second region R2 adjacent to the first region R1 and having a step difference from the first region R1.
- the first circuit pattern 220-1 includes a first part 220-1a and a second part 220-1b.
- the insulating layer 210 and the first protective layer 250 have the same structure as the insulating layer 110 and the first protective layer 150 of the first embodiment. Accordingly, its description will be omitted.
- the first part 220-1a of the first circuit pattern 220-1 has the same structure as the first part 120-1a of the first circuit pattern 110-1 of the first embodiment. Accordingly, the description thereof will also be omitted.
- the second part 220-1b of the first circuit pattern 220-1 is disposed on the first part 220-1a.
- the second part 220-1b may have a step difference from the first part 220-1a.
- the first part 120-1a did not have a step difference from the second part 120-1b. That is, the width at the portion closest to the second part (120-1b) of the first part (120-1a) in the first embodiment is the first part (120-1b) of the first part (120-1b). It was the same as the width at the part closest to 120-1a).
- the second part 220-1b in the second embodiment may have a step difference from the first part 220-1a.
- the width at the part of the second part (220-1b) closest to the first part (220-1a) is the width of the second part (220-1b) of the first part (220-1a). It may be different from the width at the nearest part. More specifically, the width at the portion of the second part (220-1b) closest to the first part (220-1a) is the second part (220-1b) of the first part (220-1a). is smaller than the width at the most adjacent part.
- a step portion 220-1ST may be provided between the first part 220-1a and the second part 220-1b of the first circuit pattern 220-1.
- the step portion 220-1ST is formed due to a difference in width between the first part 220-1a and the second part 220-1a of the first circuit pattern 220-1. This may refer to a portion where a portion of the upper surface of the part 220-1a is exposed. That is, the upper surface of the first part 220-1a does not contact the second part 220-1b and the first protective layer 250.
- outer surface 220-1bs of the second part 220-1b may have a slope whose width gradually decreases as it moves away from the first part 220-1a.
- the outer surface 220-1bs of the second part 220-1b may be a straight line with a specific slope whose width gradually decreases, but is not limited thereto.
- the outer surface 220-1bs of the second part 220-1b may have a specific curvature whose width decreases toward the top.
- the outer surface 220-1bs of the second part 220-1b having the curvature may have an outwardly convex shape or, differently, may have an inwardly concave shape.
- Figure 9 is a diagram showing a circuit board according to a third embodiment.
- the circuit board of the third embodiment includes an insulating layer 310, a first circuit pattern 320-1, and a first protective layer 350.
- the first protective layer 350 includes a first open portion OP1.
- the first protective layer 350 includes the first open portion OP1 and a first region R1 adjacent to the first open portion OP1.
- the first protective layer 350 may include a second region R2 adjacent to the first region R1 and having a step difference from the first region R1.
- the first circuit pattern 320-1 includes a first part 320-1a and a second part 320-1b.
- the insulating layer 310 and the first protective layer 350 have the same structure as the insulating layer 110 and the first protective layer 150 of the first embodiment. Accordingly, its description will be omitted.
- the first part 320-1a of the first circuit pattern 320-1 has the same structure as the first part 120-1a of the first circuit pattern 110-1 of the first embodiment. Accordingly, the description thereof will also be omitted.
- the second part 320-1b of the first circuit pattern 320-1 is disposed on the first part 320-1a.
- the second part 320-1b may have a step difference from the first part 320-1a.
- the width at the part of the second part (320-1b) closest to the first part (320-1a) is the width of the second part (320-1b) of the first part (320-1a). It may be different from the width in adjacent parts. Specifically, the width at the part of the second part (320-1b) closest to the first part (320-1a) is the width of the second part (320-1b) of the first part (320-1a). It is smaller than the width at the closest part.
- a step portion 320-1ST may be provided between the first part 320-1a and the second part 320-1b of the first circuit pattern 320-1.
- the step portion 320-1ST is formed due to a difference in width between the first part 320-1a and the second part 320-1a of the first circuit pattern 320-1. This may refer to a portion in which a portion of the upper surface of the part 320-1a is exposed. That is, the upper surface of the first part 320-1a does not contact the second part 320-1b and the first protective layer 350.
- the width of the second part 320-1b may not change as it moves away from the first part 320-1a.
- the outer surface 320-1bs of the second part 320-1b may have no change in width and may be a straight line perpendicular to the lower surface of the first circuit pattern 320-1.
- Figure 10 is a diagram showing a circuit board according to a fourth embodiment.
- the circuit board of the fourth embodiment includes an insulating layer 410, a first circuit pattern 420-1, and a first protective layer 450.
- the first protective layer 450 includes a first open portion OP1.
- the first protective layer 450 includes the first open portion OP1 and includes a first region R1 adjacent to the first open portion OP1.
- the first protective layer 450 may include a second region R2 adjacent to the first region R1 and having a step difference from the first region R1.
- the first circuit pattern 420-1 includes a first part 420-1a and a second part 420-1b.
- the insulating layer 410 and the first protective layer 450 have the same structure as the insulating layer 110 and the first protective layer 150 of the first embodiment. Accordingly, its description will be omitted.
- the first part 420-1a of the first circuit pattern 420-1 has the same structure as the first part 120-1a of the first circuit pattern 110-1 of the first embodiment. Accordingly, the description thereof will also be omitted.
- the second part 420-1b of the first circuit pattern 420-1 is disposed on the first part 420-1a.
- the second part 420-1b may be divided into a plurality of sub-parts.
- the second part 420-1b may be divided into a plurality of sub-parts based on the shape or slope of the outer surface.
- the second part 420-1b includes a first sub-part 420-1b1 disposed on the first part 420-1a. Additionally, the second part 420-1b may include a second sub-part 420-1b2 disposed on the first sub-part 420-1b1.
- the vertical cross-sections of the first sub-part 420-1b1 and the second sub-part 420-1b2 may have different shapes.
- the outer surfaces of the first sub-part 420-1b1 and the second sub-part 420-1b2 may have different slopes.
- the outer surface 420-1b1s of the first sub-part 420-1b1 may be a curve having a specific curvature. Accordingly, the width of the first sub-part 420-1b1 may decrease as it moves away from the first part 420-1a, based on the curvature of the curve. Additionally, the outer surface 420-1b1s of the first sub-part 420-1b1 having the curvature may have an outwardly convex shape or, alternatively, an inwardly concave shape.
- the outer surface 420-1b2s of the second sub-part 420-1b2 may have a slope whose width gradually decreases as it moves away from the first sub-part 420-1b1.
- the outer surface 420-1b2s of the second sub-part 420-1b2 may be a straight line with a specific slope whose width gradually decreases, but is not limited thereto.
- the outer surface 420-1b2s of the second sub-part 420-1b2 may have a specific curvature.
- the outer surface 420-1b2s of the second sub-part 420-1b2 having the curvature may have an outwardly convex shape or, alternatively, an inwardly concave shape.
- Figure 11 is a diagram showing a circuit board according to the fifth embodiment.
- the circuit board of the fifth embodiment includes an insulating layer 510, a first circuit pattern 520-1, and a first protective layer 550.
- the first protective layer 550 includes a first open portion OP1.
- the first protective layer 550 includes the first open portion OP1 and a first region R1 adjacent to the first open portion OP1.
- the first protective layer 550 may include a second region R2 adjacent to the first region R1 and having a step difference from the first region R1.
- the first circuit pattern 520-1 includes a first part 520-1a and a second part 520-1b.
- the insulating layer 510 and the first protective layer 550 have the same structure as the insulating layer 110 and the first protective layer 150 of the first embodiment. Accordingly, its description will be omitted.
- the first part 520-1a of the first circuit pattern 520-1 has the same structure as the first part 120-1a of the first circuit pattern 110-1 of the first embodiment. Accordingly, the description thereof will also be omitted.
- the second part 520-1b of the first circuit pattern 520-1 is disposed on the first part 520-1a.
- the second part 520-1b may be divided into a plurality of sub-parts.
- the second part 520-1b may be divided into a plurality of sub-parts based on the shape or slope of the outer surface.
- the second part 520-1b includes a first sub-part 520-1b1 disposed on the first part 520-1a. Additionally, the second part 520-1b may include a second sub-part 520-1b2 disposed on the first sub-part 520-1b1.
- the vertical cross-sections of the first sub-part 520-1b1 and the second sub-part 520-1b2 may have different shapes.
- the outer surfaces of the first sub-part 520-1b1 and the second sub-part 520-1b2 may have different slopes.
- the outer surface 520-1b1s of the first sub-part 520-1b1 may be curved with a specific curvature. Accordingly, the width of the first sub-part 520-1b1 may decrease as it moves away from the first part 520-1a, based on the curvature of the curve. Additionally, the outer surface 520-1b1s of the first sub-part 520-1b1 having the curvature may have an outwardly convex shape or, alternatively, an inwardly concave shape.
- the width of the second sub-part 520-1b2 may not change as it moves away from the first sub-part 520-1b1.
- the outer surface 520-1b2s of the second sub-part 520-1b2 may be perpendicular to the lower surface of the first circuit pattern 520-1.
- Figure 12 is a cross-sectional view showing a semiconductor package according to an embodiment.
- the semiconductor package of the embodiment may include any one of the circuit boards shown in FIGS. 5, 8, 9, 10, and 11. Additionally, the circuit board may have a multilayer structure.
- the semiconductor package of the embodiment includes a first connection portion 610. That is, the circuit pattern layer of the circuit pattern includes pads disposed to correspond to the mounting area of the semiconductor device 6420.
- the pad may refer to the pad 120-11 of the first circuit pattern 120-1 of the first circuit pattern layer.
- the first connection part 610 may have a hexahedral shape.
- the cross section of the first connection part 610 may have a square shape.
- the cross-section of the first connection part 610 may include a rectangle or square.
- the first connection part 610 may have a spherical shape.
- the cross-section of the first connection part 610 may include a circular shape or a semicircular shape.
- the cross-section of the first connection portion 610 may include a partially or entirely rounded shape.
- the cross-sectional shape of the first connection part 610 may be flat on one side and curved on the other side.
- the first connection portion 610 may be a solder ball, but is not limited thereto. Meanwhile, at least a portion of the first connection portion 610 may be disposed within the crevice.
- the semiconductor package of the embodiment includes a component disposed on the first connection portion 610.
- the component disposed on the first connection unit 610 may be a semiconductor device, or alternatively, it may be an interposer.
- the description will be made on the assumption that the component disposed on the first connection portion 610 is the semiconductor device 620.
- the semiconductor device 620 may be a logic chip, but is not limited thereto.
- the semiconductor device 620 may be an application processor (AP) chip among a central processor (eg, CPU), graphics processor (eg, GPU), digital signal processor, cryptographic processor, microprocessor, or microcontroller.
- the semiconductor device 620 includes a terminal 625 on its lower surface. Additionally, the terminal 625 of the semiconductor device 620 is connected to the circuit pattern layer of the circuit board through the first connection portion 610.
- the semiconductor package may include an underfill 630.
- the underfill 630 may be disposed on the circuit board to cover the surroundings of the semiconductor device 620.
- the underfill 630 may be optionally omitted.
- the underfill 630 may be omitted and the function of the underfill 630 may be performed in the molding layer 650.
- the semiconductor package may include a second connection portion 640.
- the second connection portion 640 is disposed on the first circuit pattern layer of the circuit board.
- the second connection portion 640 may be disposed on the second circuit pattern 120-2 of the first circuit pattern layer 120.
- the second connection part 640 may be a bump.
- the second connection portion 640 may be a solder bump, but is not limited thereto.
- the second connection part 640 may be a post bump.
- the second connection part 640 may include a copper post and a solder bump disposed on the copper post.
- the top surface of the second connection part 640 may be positioned higher than the top surface of the semiconductor device 620. Through this, it is possible to prevent the semiconductor device 620 from being damaged during the bonding process of the external substrate 600 disposed on the second connection portion 640.
- the semiconductor package may include a molding layer 650.
- the molding layer 650 may mold components disposed on the circuit board.
- the molding layer 650 may be EMC (Epoxy Mold Compound), but is not limited thereto.
- the molding layer 650 may have a low dielectric constant.
- the dielectric constant (Dk) of the molding layer 650 may be 0.2 to 10.
- the dielectric constant (Dk) of the molding layer 650 may be 0.5 to 8.
- the dielectric constant (Dk) of the molding layer 650 may be 0.8 to 5. Accordingly, in the embodiment, the molding layer 650 has a low dielectric constant, so that the heat dissipation characteristics of the heat generated from the semiconductor device 620 can be improved.
- the molding layer 650 may include an opening.
- the molding layer 650 may include an opening that overlaps the upper surface of the second connection part 640 in the vertical direction.
- the semiconductor package includes a third connection portion 660.
- the third connection portion 660 may be disposed under the circuit pattern layer disposed on the lowermost side of the circuit board.
- the third connection portion 660 may be solder for connecting the semiconductor package of the embodiment to a separate external board (for example, a main board of an electronic device), but is not limited thereto.
- the semiconductor package includes an external substrate 700.
- the external board 700 may refer to a separate board combined with the circuit board of the embodiment.
- the semiconductor device 620 disposed on the circuit board may be a logic chip such as a CPU or GPU, and the external substrate 700 may refer to a memory substrate on which a memory chip connected to the logic chip is disposed. there is.
- the external substrate 700 may be an interposer that connects the circuit board to a memory substrate on which a semiconductor device 780 corresponding to a memory chip is disposed.
- the external substrate 700 may include an insulating layer 710, a circuit layer 720, a through electrode 730, an upper protective layer 740, and a lower protective layer 750. Additionally, the external substrate 700 may include a fourth connection portion 760. The fourth connection part 760 may be disposed between the external substrate 700 and the third connection part 740.
- the semiconductor package may include a fifth connection portion 770.
- the fifth connection part 770 may be disposed on the external substrate 700.
- the semiconductor package may include a semiconductor device 780.
- the semiconductor device 780 may be mounted on the external substrate 700 through the fifth connection portion 770.
- the semiconductor device 780 may be a memory chip, but is not limited thereto.
- the terminal 785 of the semiconductor device 780 may be electrically connected to the external substrate 700 through the fifth connection portion 770.
- the semiconductor device 780 is shown as being mounted using a flip-chip method, but it is not limited thereto.
- the semiconductor device 780 may be a stack memory chip, and thus may be electrically connected to the external substrate 700 through a connection member such as a separate wire.
- 13 to 18 are cross-sectional views showing a circuit board manufacturing method according to an embodiment in manufacturing process order.
- an insulating layer 110 is prepared.
- VH through hole
- a through electrode 140 may be formed on the insulating layer 110 to fill the through hole (VH). Additionally, in an embodiment, a first circuit pattern layer 120 including a first circuit pattern 120-1 and a second circuit pattern 120-2 may be formed on the upper surface of the insulating layer 110. Additionally, in the embodiment, a second circuit pattern layer 130 may be formed on the lower surface of the insulating layer 120.
- a first resist layer R1 is formed on the insulating layer 120.
- the first resist layer (R1) may refer to a protective layer before the open portion is formed in the first protective layer 150.
- the first resist layer (R1) may be a solder resist layer, but is not limited thereto.
- a second resist layer R2 is formed under the insulating layer 120.
- the second resist layer (R2) may refer to a protective layer before the open portion is formed in the second protective layer 160.
- the second resist layer (R2) may be a solder resist layer, but is not limited thereto.
- the embodiment may proceed with a process of exposing the first resist layer R1 and forming the first exposure pattern ER1 and the second exposure pattern ER2.
- the first exposure pattern ER1 and the second exposure pattern ER2 may be formed to correspond to an area in the first resist layer R1 where an open portion is to be formed.
- the embodiment may proceed with a process of forming a third exposure pattern (ER3) by exposing the second resist layer (R2).
- the embodiment as the first to third exposure patterns ER1, ER2, and ER3 are formed, the first resist layer R1 and the second resist layer R2 A process of curing the remaining areas excluding the first to third exposure patterns (ER1, ER2, and ER3) may be performed. Thereafter, the embodiment may proceed with a thinning process to reduce the thickness of the area corresponding to the first to third exposure patterns ER1, ER2, and ER3 to a target thickness.
- the thinning process may be performed using an organic alkaline compound containing tetramethylammonium hydroxide (TMAH) or trimethyl-2-hydroxyethylammonium hydroxide (choline).
- TMAH tetramethylammonium hydroxide
- choline trimethyl-2-hydroxyethylammonium hydroxide
- the embodiment can form a first open part OP1 and a second open part OP2 in the first protective layer 150, respectively.
- the embodiment may proceed with OSP preprocessing. And, as the OSP preprocessing progresses, the first circuit pattern 120-1 that is not covered with the first protective layer 150
- a portion of the outer surface may be removed by etching. Through this, a crevice may be formed between the first protective layer 150 and the first circuit pattern 120-1. Additionally, the OSP preprocessing may also be performed on the top surface of the second circuit pattern 120-2 that vertically overlaps the second open portion OP2. Accordingly, a recess 120-2R may be formed on the upper surface of the second circuit pattern 120-2 by the OSP preprocessing.
- a circuit board having the characteristics of the above-described invention when used in IT devices such as smartphones, server computers, TVs, or home appliances, functions such as signal transmission or power supply can be stably performed.
- a circuit board having the characteristics of the present invention when a circuit board having the characteristics of the present invention performs a semiconductor package function, it can safely protect the semiconductor chip from external moisture or contaminants, and can prevent problems such as leakage current or electrical short circuits between terminals. Alternatively, the problem of electrical opening of the terminal supplying the semiconductor chip can be solved. Additionally, if it is responsible for the function of signal transmission, the noise problem can be solved.
- the circuit board having the characteristics of the above-described invention can maintain the stable function of IT devices or home appliances, so that the entire product and the circuit board to which the present invention is applied can achieve functional unity or technical interoperability with each other.
- a circuit board having the characteristics of the above-mentioned invention is used in a transportation device such as a vehicle, it is possible to solve the problem of distortion of signals transmitted to the transportation device, or to safely protect the semiconductor chip that controls the transportation device from the outside and prevent leakage.
- the stability of the transport device can be further improved by solving the problem of electrical short-circuiting between currents or terminals, or the problem of electrical opening of the terminal supplying the semiconductor chip. Accordingly, the transportation device and the circuit board to which the present invention is applied can achieve functional unity or technical interoperability with each other.
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Abstract
Description
Claims (10)
- 절연층;상기 절연층 상에 배치된 제1 회로 패턴; 및상기 절연층 상에 배치되고, 상기 제1 회로 패턴과 수직으로 중첩되는 제1 오픈 부분을 포함하는 제1 보호층을 포함하고,상기 제1 보호층은 상기 제1 오픈 부분을 포함하고, 제1 두께를 가지는 제1 영역과,상기 제1 오픈 부분을 포함하지 않으며, 상기 제1 두께보다 큰 제2 두께를 갖는 제2 영역을 포함하고,상기 제1 영역의 상기 제1 두께는 상기 제1 회로 패턴의 제3 두께보다 작고,상기 제1 오픈 부분을 구성하는 상기 제1 영역의 내측면은,상기 제1 회로 패턴의 외측면과 직접 접촉하는 제1 내측면과,상기 제1 회로 패턴의 외측면과 이격되는 제2 내측면을 포함하는,회로 기판.
- 제1항에 있어서,상기 제1 영역의 상기 제2 내측면은,상기 제1 영역의 상기 제1 내측면과 연결되며, 상기 제1 내측면이 가지는 경사에 대응하는 경사를 가지는,회로 기판.
- 제1항에 있어서,상기 제2 영역의 상기 제2 두께는 상기 제1 회로 패턴의 상기 제3 두께보다 큰,회로 기판.
- 제1항에 있어서,상기 제1 회로 패턴은,상기 제1 회로 패턴의 상면을 향할수록 폭이 감소하는 영역을 포함하고,상기 제1 영역의 상기 제2 내측면은 상기 제1 회로 패턴의 상기 폭이 감소하는 영역의 외측면과 이격되는,회로 기판.
- 제1항 내지 제4항 중 어느 한 항에 있어서,상기 제1 영역의 상기 제1 두께는,상기 제1 회로 패턴의 상기 제3 두께의 20% 내지 90%의 범위를 만족하는,회로 기판.
- 제5항에 있어서,상기 제1 회로 패턴은,상기 절연층의 상면에 배치되고, 외측면이 상기 제1 영역의 상기 제1 내측면과 접촉하는 제1 파트; 및상기 제1 파트 상에 배치되고, 외측면이 상기 제1 보호층과 접촉하지 않는 제2 파트를 포함하고,상기 제2 파트는 상기 제1 파트의 폭보다 작은 폭을 가지는 영역을 포함하는,회로 기판.
- 제6항에 있어서,상기 제1 오픈 부분의 폭은 상기 제1 파트의 폭에 대응되는,회로 기판.
- 제6항에 있어서,상기 제1 파트는 상기 제1 영역의 상기 제1 두께의 20% 내지 90%의 범위의 제4 두께를 가지는,회로 기판.
- 제6항에 있어서,상기 제2 파트의 외측면은,상기 제2 파트의 상면을 향할수록 폭이 점진적으로 감소하는 직선의 경사를 가지는,회로 기판.
- 제6항에 있어서,상기 제2 파트의 외측면은,상기 제2 파트의 상면을 향할수록 폭이 감소하는 특정 곡률의 곡선의 경사를 가지는,회로 기판.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23820159.4A EP4539618A4 (en) | 2022-06-10 | 2023-06-12 | PRINTED CIRCUIT BOARD AND SEMICONDUCTOR HOUSING INCLUDING IT |
| JP2024572331A JP2025519551A (ja) | 2022-06-10 | 2023-06-12 | 回路基板およびこれを含む半導体パッケージ |
| CN202380045955.6A CN119343991A (zh) | 2022-06-10 | 2023-06-12 | 电路板和包括该电路板的半导体封装 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2022-0070917 | 2022-06-10 | ||
| KR1020220070917A KR20230170439A (ko) | 2022-06-10 | 2022-06-10 | 회로기판 및 이를 포함하는 반도체 패키지 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023239224A1 true WO2023239224A1 (ko) | 2023-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/008033 Ceased WO2023239224A1 (ko) | 2022-06-10 | 2023-06-12 | 회로기판 및 이를 포함하는 반도체 패키지 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4539618A4 (ko) |
| JP (1) | JP2025519551A (ko) |
| KR (1) | KR20230170439A (ko) |
| CN (1) | CN119343991A (ko) |
| WO (1) | WO2023239224A1 (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025150970A1 (ko) * | 2024-01-10 | 2025-07-17 | 엘지이노텍 주식회사 | 회로 기판 및 이를 포함하는 반도체 패키지 |
| WO2025206722A1 (ko) * | 2024-03-28 | 2025-10-02 | 엘지이노텍 주식회사 | 회로 기판 및 이를 포함하는 반도체 패키지 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11191670A (ja) * | 1997-12-25 | 1999-07-13 | Victor Co Of Japan Ltd | プリント配線基板及びその製造方法 |
| KR20130008346A (ko) * | 2011-07-12 | 2013-01-22 | 삼성전기주식회사 | 인쇄회로기판 및 그 제조방법 |
| KR101555460B1 (ko) * | 2012-05-16 | 2015-09-23 | 니혼도꾸슈도교 가부시키가이샤 | 배선기판 |
| KR20200000700U (ko) * | 2013-04-25 | 2020-04-02 | 미쓰비시 세이시 가부시키가이샤 | 프린트 배선판 |
| KR20210114196A (ko) * | 2020-03-10 | 2021-09-23 | 엘지이노텍 주식회사 | 인쇄회로기판 및 이의 제조 방법 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI402003B (zh) * | 2009-10-16 | 2013-07-11 | Princo Corp | 軟性多層基板之金屬層結構及其製造方法 |
| JP5410580B1 (ja) * | 2012-08-09 | 2014-02-05 | 日本特殊陶業株式会社 | 配線基板 |
-
2022
- 2022-06-10 KR KR1020220070917A patent/KR20230170439A/ko active Pending
-
2023
- 2023-06-12 WO PCT/KR2023/008033 patent/WO2023239224A1/ko not_active Ceased
- 2023-06-12 EP EP23820159.4A patent/EP4539618A4/en active Pending
- 2023-06-12 JP JP2024572331A patent/JP2025519551A/ja active Pending
- 2023-06-12 CN CN202380045955.6A patent/CN119343991A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11191670A (ja) * | 1997-12-25 | 1999-07-13 | Victor Co Of Japan Ltd | プリント配線基板及びその製造方法 |
| KR20130008346A (ko) * | 2011-07-12 | 2013-01-22 | 삼성전기주식회사 | 인쇄회로기판 및 그 제조방법 |
| KR101555460B1 (ko) * | 2012-05-16 | 2015-09-23 | 니혼도꾸슈도교 가부시키가이샤 | 배선기판 |
| KR20200000700U (ko) * | 2013-04-25 | 2020-04-02 | 미쓰비시 세이시 가부시키가이샤 | 프린트 배선판 |
| KR20210114196A (ko) * | 2020-03-10 | 2021-09-23 | 엘지이노텍 주식회사 | 인쇄회로기판 및 이의 제조 방법 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4539618A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119343991A (zh) | 2025-01-21 |
| EP4539618A1 (en) | 2025-04-16 |
| EP4539618A4 (en) | 2026-02-18 |
| KR20230170439A (ko) | 2023-12-19 |
| JP2025519551A (ja) | 2025-06-26 |
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