WO2022057597A1 - 电路板组件、摄像模组及电子设备 - Google Patents

电路板组件、摄像模组及电子设备 Download PDF

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Publication number
WO2022057597A1
WO2022057597A1 PCT/CN2021/115183 CN2021115183W WO2022057597A1 WO 2022057597 A1 WO2022057597 A1 WO 2022057597A1 CN 2021115183 W CN2021115183 W CN 2021115183W WO 2022057597 A1 WO2022057597 A1 WO 2022057597A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
chip
board assembly
reinforcing plate
photosensitive chip
Prior art date
Application number
PCT/CN2021/115183
Other languages
English (en)
French (fr)
Inventor
缪伟亮
罗振东
王勇
原帅
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2022057597A1 publication Critical patent/WO2022057597A1/zh

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/55Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets

Definitions

  • the present application relates to the technical field of circuit boards, and in particular, to a circuit board assembly, a camera module and an electronic device.
  • the traditional circuit board is provided with a hollow area to expose the reinforcing plate at the bottom of the circuit board.
  • the chip is set in the hollow area and bonded by DA (Die Attach) glue. between the bottom surface of the chip and the reinforcing plate.
  • DA Die Attach
  • the present application provides a circuit board assembly, a camera module and an electronic device with better heat dissipation effect.
  • inventions of the present application provide a circuit board assembly.
  • the circuit board assembly includes a reinforcing plate, an adhesive material, a chip, a first injection molded part and a circuit board.
  • the chip may be a photosensitive chip or a fingerprint chip or the like. The chip described below is described by taking a photosensitive chip as an example.
  • the glue material is fixed on the surface of the reinforcing plate.
  • the photosensitive chip is fixed on the surface of the adhesive material away from the reinforcing plate.
  • the reinforcing plate, the adhesive material and the photosensitive chip enclose a space.
  • the first injection part is located in the space, and the first injection part is connected between the photosensitive chip and the reinforcing plate.
  • the thermal conductivity of the first injection molded part is greater than the thermal conductivity of the glue material.
  • Thermal conductivity refers to the heat transfer through 1 square meter area within a certain period of time for a material with a thickness of 1 meter and a temperature difference of 1 degree (K, °C) on both sides of the material, the unit is watt/( mx degrees), which is (W/(mxK).
  • the circuit board is fixed to the reinforcing plate.
  • the circuit board and the photosensitive chip are located on the same side of the reinforcing plate.
  • the circuit board is arranged around the photosensitive chip.
  • the photosensitive chip is electrically connected to the circuit board.
  • the first injection molded part is arranged in the space.
  • the connection area between the first injection molded part and the photosensitive chip is larger.
  • the connection firmness of the photosensitive chip and the first injection molded part is better.
  • the thermal conductivity of the first injection molded part is greater than the thermal conductivity of the adhesive material, the heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the first injection molded part, and then exported through the reinforcing plate, that is, the heat generated by the photosensitive chip Heat will not be difficult to transfer to the reinforcement plate due to the low thermal conductivity of the adhesive.
  • the contact area between the photosensitive chip and the first injection molded part is larger, and the heat dissipation effect of the photosensitive chip is better.
  • the thermal noise of the camera module is low and the back focus of the camera module is less likely to vary.
  • the heat transfer path to the outside of the circuit board assembly is shorter, and the heat dissipation efficiency of the photosensitive chip is higher.
  • the adhesive material does not easily affect the flatness of the photosensitive chip, so that when the circuit board assembly is applied to the camera module, problems such as unclearness or distortion of the image captured by the camera module can be avoided.
  • the thermal conductivity of the first injection molded part is greater than or equal to 2W/(mxK).
  • the thermal conductivity of the first injection molded part is much larger than that of the adhesive material. At this time, the heat generated by the photosensitive chip can be dissipated at a faster speed, and the heat dissipation effect of the photosensitive chip is better.
  • the material of the first injection part includes epoxy resin molding compound.
  • Epoxy resin molding compounds include epoxy resins, phenolic resins, and alumina micropowders.
  • the reinforcing plate includes a bottom plate and a boss.
  • the boss is connected to the surface of the bottom plate.
  • the circuit board is fixed on the bottom plate and arranged around the boss.
  • the glue material is fixed on the surface of the boss away from the bottom plate. Part of the bottom plate, the boss, the adhesive material and the photosensitive chip enclose the space.
  • a new space is formed between the photosensitive chip and the reinforcing plate by arranging a reinforcing plate with a boss, and using the boss to elevate the photosensitive chip.
  • the first injection molded part is then disposed in the space between the photosensitive chip and the reinforcing plate.
  • the size of the space can be flexibly adjusted by adjusting the height of the boss.
  • the height of the first injection molded part disposed between the photosensitive chip and the reinforcing plate can also be flexibly controlled. In this way, on the one hand, the first injection molded part is not easy to be formed by injection molding due to the small space;
  • the number of the bosses is multiple.
  • a plurality of the bosses are spaced apart and surrounded by a ring structure. In this way, when the photosensitive chip is fixed on the plurality of bosses, the photosensitive chip is not prone to tilt, and the photosensitive chip has better stability.
  • a part of the first injection molded part is located in the area surrounded by the plurality of bosses.
  • a part of the first injection molded part is located in the flow channel between two adjacent bosses. At this time, the first injection molded part can package the photosensitive chip, the plurality of bosses and the bottom plate into one body. The integrity of the circuit board assembly is better.
  • the reinforcing plate includes bumps.
  • the bumps are fixed on the surface of the bottom plate facing the photosensitive chip.
  • the bump and the boss are located on the same side of the bottom plate.
  • the bump is opposite to the photosensitive chip.
  • the first injection part covers the bump. At this time, the contact area between the reinforcing plate and the first injection molded part is larger. In this way, the heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the first injection molded part, and then transferred to the outside of the circuit board assembly through the reinforcing plate. The heat dissipation effect of the circuit board assembly is better.
  • the bottom plate is provided with a second through hole.
  • the second through hole penetrates a surface of the base plate facing the photosensitive chip and a surface of the base plate away from the photosensitive chip.
  • the second through hole is opposite to the photosensitive chip.
  • a part of the first injection part is disposed in the second through hole. At this time, part of the heat generated by the photosensitive chip can be directly transferred to the outside of the circuit board assembly through the first injection molded part, and the heat dissipation effect of the photosensitive chip is better.
  • the bottom plate is provided with grooves.
  • the opening of the groove is located on the surface of the bottom plate facing the photosensitive chip.
  • the groove is facing the photosensitive chip.
  • the first injection part is arranged in the groove. In this way, the contact area between the reinforcing plate and the first injection molded part is larger. The heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the first injection molded part at a relatively fast speed, and then transferred to the outside of the circuit board assembly through the reinforcing plate. In this way, the heat dissipation effect of the circuit board assembly is better.
  • the number of the bosses is one. A portion of the first injection molded part is disposed around the boss.
  • a new space is formed between the photosensitive chip and the base plate by fixedly connecting a boss on the base plate and using the boss to raise the photosensitive chip.
  • the first injection molded part is then arranged around the boss and connected to the boss. In this way, the connection area between the first injection molded part and the photosensitive chip is larger.
  • the connection firmness of the photosensitive chip and the first injection molded part is better.
  • the thermal conductivity of the first injection molded part is greater than the thermal conductivity of the adhesive material, the heat generated by the photosensitive chip can be quickly transmitted to the reinforcing plate through the first injection molded part, and then exported through the reinforcing plate, that is, the photosensitive chip The heat generated will not be difficult to transmit to the reinforcement plate due to the low thermal conductivity of the adhesive. At this time, the heat dissipation effect of the photosensitive chip is better.
  • the circuit board assembly further includes electronic components and a second injection molded part.
  • the electronic component is fixed on the surface of the circuit board away from the bottom plate, and is electrically connected to the circuit board.
  • the electronic components can be capacitors, inductors, resistors, or driver chips. The electronic components are used to assist the photosensitive chip to perform signal processing on the collected ambient light.
  • the second injection molded part is fixed on the circuit board and the reinforcing plate, and covers the electronic component. At this time, the second injection molded part is used to package the electronic component on the circuit board. The integrity of the circuit board assembly is better.
  • the second injection part and the first injection part are integrally formed. At this time, the second injection part and the first injection part have fewer molding steps, which can reduce the cost input.
  • the circuit board assembly further includes gold wires.
  • One end of the gold wire is electrically connected to the photosensitive chip, and the other end is electrically connected to the circuit board.
  • the second injection part covers the gold wire. At this time, the second injection molded part can protect the gold wire and prevent the gold wire from being damaged. In addition, the integrity of the circuit board assembly is better.
  • the surface of the photosensitive chip away from the adhesive material includes a sensing area and a non-sensing area.
  • the non-sensing area is connected to the periphery of the sensing area. It can be understood that, when the photosensitive chip is a sensor chip, the sensing area is a photosensitive area, and the non-sensing area is a non-sensing area. One end of the gold wire is electrically connected to the non-sensing area.
  • the second injection molded part covers the non-photosensitive area. At this time, the heat generated by the photosensitive chip can also be transmitted to the outside of the circuit board assembly through the second injection molded part. In this way, the contact area between the photosensitive chip and the second injection molded part is further increased. The heat dissipation effect of the photosensitive chip is better.
  • the glue material is DA glue.
  • the reinforcing plate includes a bottom plate and a boss.
  • the boss is connected to the surface of the bottom plate.
  • the circuit board is fixed on the bottom plate and arranged around the boss.
  • the glue material is fixed on the surface of the boss away from the bottom plate. Part of the bottom plate, the boss, the adhesive material and the photosensitive chip enclose the space.
  • the number of the bosses is plural.
  • a plurality of the bosses are spaced apart and surrounded by a ring structure.
  • a portion of the first injection molded part is located in an area surrounded by the plurality of bosses.
  • a part of the first injection molded part is located in the flow channel between two adjacent bosses.
  • the circuit board assembly further includes electronic components and a second injection molded part.
  • the electronic component is fixed on the surface of the circuit board away from the bottom plate, and is electrically connected to the circuit board.
  • the second injection part is fixed on the circuit board and the reinforcing plate, and covers the electronic component.
  • the second injection part and the first injection part are integrally formed.
  • the materials of the first injection part and the second injection part include epoxy resin, phenolic resin and alumina fine powder.
  • the circuit board assembly also includes gold wires. One end of the gold wire is electrically connected to the photosensitive chip, and the other end is electrically connected to the circuit board.
  • the second injection part covers the gold wire.
  • the surface of the photosensitive chip away from the adhesive material includes a photosensitive area and a non-photosensitive area.
  • the non-photosensitive area is connected to the periphery of the photosensitive area.
  • One end of the gold wire is electrically connected to the non-photosensitive area.
  • the second injection molded part covers the non-photosensitive area.
  • circuit board components include reinforcing boards, circuit boards, plastic materials, chips, electronic components and injection molded parts.
  • the chip may be a photosensitive chip or a fingerprint chip or the like.
  • the chip described below is described by taking a photosensitive chip as an example.
  • the electronic components can be capacitors, inductors, resistors, or driver chips. The electronic components are used to assist the photosensitive chip to perform signal processing on the collected ambient light.
  • the reinforcing plate includes a bottom plate and a boss.
  • the boss is connected to the surface of the bottom plate.
  • the circuit board is fixed on the bottom plate and arranged around the boss.
  • the glue material is fixed on the surface of the boss away from the bottom plate.
  • the chip is fixed on the surface of the adhesive material away from the boss, and is electrically connected to the circuit board.
  • the electronic component is fixed on the surface of the circuit board away from the bottom plate, and is electrically connected to the circuit board.
  • the injection molded part includes a first part (also referred to as a second injection molded part) and a second part (also referred to as a first injection molded part) connecting the first part.
  • the injection molded part is an integral molding structure.
  • the first part is fixed on the circuit board and the reinforcing plate, and covers the electronic component.
  • the second part is fixed between the chip and the reinforcing plate.
  • the thermal conductivity of the injection molded part is greater than the thermal conductivity of the glue material
  • a new space is formed between the photosensitive chip and the reinforcing plate by arranging a reinforcing plate with a boss, and using the boss to elevate the photosensitive chip.
  • the second part of the injection molded part is arranged in the space between the photosensitive chip and the reinforcing plate.
  • most of the outer surface of the photosensitive chip is covered by the injection molded part, that is, the contact area between the injection molded part and the photosensitive chip is relatively large.
  • the connection between the photosensitive chip and the injection molded part is firmer.
  • the thermal conductivity of the injection molded part is greater than the thermal conductivity of the plastic material, the heat generated by the photosensitive chip can be quickly transferred to the reinforcement plate through the injection molded part, and then exported to the camera module through the reinforcement plate, that is, the photosensitive chip generates heat.
  • the heat will not be difficult to transmit to the reinforcing plate due to the low thermal conductivity of the adhesive.
  • the contact area between the photosensitive chip and the injection molded part is larger, and the heat dissipation effect of the photosensitive chip is better.
  • the thermal noise of the camera module is low and the back focus of the camera module is less likely to vary.
  • the heat transfer path to the outside of the camera module is short, and the heat dissipation efficiency of the photosensitive chip is high.
  • the adhesive material does not easily affect the flatness of the photosensitive chip, so that when the circuit board assembly is applied to the camera module, problems such as indistinctness or distortion of the image captured by the camera module are avoided.
  • injection molded parts can also be used to encapsulate the circuit board, the reinforcing plate, the photosensitive chip and the electronic components, so as to ensure better structural strength of the circuit board assembly.
  • the injection molded part of this embodiment has the effect of "multiple uses for one thing”.
  • the thermal conductivity of the injection molded part is greater than or equal to 2W/(mxK).
  • the thermal conductivity of the injection molded part is much larger than that of the plastic material. At this time, the heat generated by the photosensitive chip can be dissipated at a faster speed, and the heat dissipation effect of the photosensitive chip is better.
  • the material of the injection molded part includes epoxy resin molding compound.
  • Epoxy resin molding compounds include epoxy resins, phenolic resins, and alumina micropowders.
  • the number of the bosses is multiple.
  • a plurality of the bosses are spaced apart and surrounded by a ring structure. In this way, when the photosensitive chip is fixed on the plurality of bosses, the photosensitive chip is not prone to tilt, and the photosensitive chip has better stability.
  • the second part is located in the area surrounded by the plurality of bosses and in the flow channel between two adjacent bosses. At this time, the injection molded part can package the photosensitive chip, the plurality of bosses and the bottom plate into one body. The integrity of the circuit board assembly is better.
  • the reinforcing plate includes bumps.
  • the bump is fixed on the surface of the bottom plate facing the chip.
  • the bump and the boss are located on the same side of the bottom plate.
  • the bump is opposite to the photosensitive chip.
  • the second portion covers the bump. At this time, the contact area between the reinforcing plate and the second part is larger. In this way, the heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the second part, and then transferred to the outside of the circuit board assembly through the reinforcing plate. The heat dissipation effect of the circuit board assembly is better.
  • the bottom plate is provided with a second through hole.
  • the second through hole penetrates through a surface of the base plate facing the chip and a surface of the base plate away from the chip.
  • the second through hole is opposite to the photosensitive chip. A portion of the second portion is disposed in the second through hole. At this time, part of the heat generated by the photosensitive chip can be directly transferred to the outside of the circuit board assembly through the second part, and the heat dissipation effect of the photosensitive chip is better.
  • the bottom plate is provided with grooves.
  • the opening of the groove is located on the surface of the bottom plate facing the photosensitive chip.
  • the groove is facing the photosensitive chip.
  • the second part is arranged in the groove. In this way, the contact area between the reinforcing plate and the second part is larger.
  • the heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the second part at a relatively fast speed, and then transferred to the outside of the circuit board assembly through the reinforcing plate. In this way, the heat dissipation effect of the circuit board assembly is better.
  • the number of the bosses is one.
  • the second portion is disposed around the boss.
  • a new space is formed between the photosensitive chip and the base plate by fixedly connecting a boss on the base plate and using the boss to raise the photosensitive chip.
  • the second part is arranged around the boss and connected to the boss. In this way, the connection area between the second part and the photosensitive chip is larger.
  • the connection between the photosensitive chip and the second part is firmer.
  • the thermal conductivity of the injection molded part is greater than the thermal conductivity of the adhesive material, the heat generated by the photosensitive chip can be quickly transmitted to the reinforcing plate through the injection molded part, and then exported through the reinforcing plate, that is, the heat generated by the photosensitive chip is not It will be difficult to transfer to the reinforcement plate due to the low thermal conductivity of the adhesive. At this time, the heat dissipation effect of the photosensitive chip is better.
  • the circuit board assembly further includes gold wires.
  • One end of the gold wire is electrically connected to the chip, and the other end is electrically connected to the circuit board.
  • the first portion covers the gold wire. At this time, the first part can protect the gold wire and prevent the gold wire from being damaged. In addition, the integrity of the circuit board assembly is better.
  • the surface of the chip away from the adhesive material includes a sensing area and a non-sensing area.
  • the non-sensing area is connected to the periphery of the sensing area.
  • One end of the gold wire is electrically connected to the non-sensing area.
  • the first portion covers the non-sensing area.
  • inventions of the present application provide a circuit board assembly.
  • the circuit board assembly includes reinforcing plate, circuit board, glue material, chip and coolant.
  • the reinforcing plate includes a bottom plate and a boss. The boss is connected to the surface of the bottom plate.
  • the circuit board is fixed on the bottom plate and arranged around the boss.
  • the glue material is fixed on the surface of the boss away from the bottom plate.
  • the chip is fixed on the surface of the adhesive material away from the boss, and is electrically connected to the circuit board.
  • the chip, the glue material, the boss, and a part of the bottom plate enclose a accommodating cavity.
  • the cooling liquid is arranged in the accommodating cavity.
  • a new space is formed between the photosensitive chip and the reinforcing plate, that is, the space of the accommodating cavity, by arranging a reinforcing plate with an annular boss, and using the boss to elevate the photosensitive chip. .
  • a cooling liquid is provided in the accommodating cavity. In this way, when the photosensitive chip generates heat, the cooling liquid can absorb the heat and transmit the absorbed heat to the outside of the camera module through the reinforcing plate, thereby achieving the effect of reducing the photosensitive chip. Therefore, the heat dissipation effect of the photosensitive chip of this embodiment is better.
  • the adhesive material does not easily affect the flatness of the photosensitive chip, so that when the circuit board assembly is applied to the camera module, problems such as unclearness or distortion of the image captured by the camera module can be avoided.
  • the cooling liquid is water, glycerol type, ethylene glycol solution or sodium-potassium alloy.
  • the reinforcing plate includes bumps.
  • the bump is fixed on the surface of the bottom plate facing the chip, and the bump is located in the accommodating cavity. At this time, the contact area between the reinforcing plate and the coolant is larger. In this way, the heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the cooling liquid, and then transferred to the outside of the circuit board assembly through the reinforcing plate. The heat dissipation effect of the circuit board assembly is better.
  • the bottom plate is provided with grooves.
  • the opening of the groove is located on the surface of the bottom plate facing the photosensitive chip.
  • the groove is located in the accommodating cavity.
  • the cooling liquid is arranged in the groove. At this time, the volume of the cooling liquid in this embodiment is larger. In this way, the coolant can absorb more of the heat generated by the photosensitive chip. The heat dissipation effect of the photosensitive chip is better.
  • the bottom plate includes a first plate member and a second plate member.
  • the second board is stacked on the first board, and the second board is fixedly connected to the first board.
  • the boss is fixed on the surface of the second plate away from the first plate.
  • the second board member, the glue material, the boss and the photosensitive chip enclose a receiving cavity.
  • the second plate is provided with a second through hole.
  • the second through hole penetrates a surface of the second board facing the chip and a surface of the second board away from the chip.
  • the second through hole communicates with the accommodating cavity.
  • Part of the cooling liquid is disposed in the second through hole. At this time, the volume of the cooling liquid in this embodiment is larger. In this way, the coolant can absorb more of the heat generated by the photosensitive chip. The heat dissipation effect of the photosensitive chip is better.
  • the reinforcing plate includes bumps, the bumps are fixed on the surface of the first board facing the chip, and part or all of the bumps are located in the second through holes . At this time, the contact area between the reinforcing plate and the coolant is larger. In this way, the heat generated by the photosensitive chip can be quickly transferred to the reinforcing plate through the cooling liquid, and then transferred to the outside of the circuit board assembly through the reinforcing plate. The heat dissipation effect of the circuit board assembly is better.
  • the circuit board assembly further includes electronic components and injection molded parts.
  • the electronic component is fixed on the top surface of the circuit board and is electrically connected to the circuit board.
  • Electronic components can be capacitors, inductors, resistors, or driver chips. The electronic components are used to assist the photosensitive chip to perform signal processing on the collected ambient light.
  • the injection molded part is fixed on the circuit board and the reinforcing plate, and covers the electronic component. At this time, the injection molded part is used to encapsulate the electronic component on the circuit board. The integrity of the circuit board assembly is better.
  • the thermal conductivity of the injection molded part is greater than the thermal conductivity of the glue material.
  • the circuit board assembly further includes gold wires.
  • One end of the gold wire is electrically connected to the chip, and the other end is electrically connected to the circuit board.
  • the injection molded part covers the gold wire. At this time, the injection molded part can protect the gold wire and prevent the gold wire from being damaged. In addition, the integrity of the circuit board assembly is better.
  • the surface of the chip away from the adhesive material includes a sensing area and a non-sensing area.
  • the non-sensing area is connected to the periphery of the sensing area. It can be understood that when the chip is a sensing chip, the sensing area is a photosensitive area, and the non-sensing area is a non-sensing area. One end of the gold wire is electrically connected to the non-sensing area.
  • One end of the gold wire is electrically connected to the non-sensing area.
  • the injection molded part covers the non-inductive area.
  • the heat generated by the photosensitive chip can also be transmitted to the outside of the circuit board assembly through the injection molded part. In this way, the contact area between the photosensitive chip and the injection molded part is further increased. The heat dissipation effect of the photosensitive chip is better.
  • an embodiment of the present application provides a camera module.
  • the camera module includes an optical lens and a circuit board assembly as described above.
  • the optical lens is fixed on one side of the circuit board assembly.
  • the light-emitting side of the optical lens is facing the chip.
  • the chip is used to collect ambient light passing through the optical lens.
  • the flatness of the photosensitive chip is not easily affected by the glue material.
  • problems such as unclear or distorted images captured by the camera module are avoided.
  • the camera module further includes a bracket and a filter.
  • the bracket is connected between the optical lens and the circuit board assembly.
  • the optical filter is fixed to the bracket.
  • the filter is used for filtering stray light of ambient light passing through the optical lens. At this time, the image captured by the camera module has better clarity.
  • an embodiment of the present application provides an electronic device.
  • the electronic device includes a casing and the above-mentioned camera module, and the camera module is mounted on the casing. In this way, the electronic device also has a better heat dissipation effect.
  • FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • Fig. 2 is a partial exploded schematic view of the electronic device shown in Fig. 1;
  • FIG. 3 is a partial cross-sectional schematic view of the electronic device shown in FIG. 1 at line A-A;
  • Fig. 4 is a partial exploded schematic view of the camera module shown in Fig. 2;
  • Figure 5a is a schematic structural diagram of a conventional circuit board assembly
  • Fig. 5b is a cross-sectional view of the circuit board assembly shown in Fig. 5a on line B-B;
  • FIG. 6 is a partially exploded schematic view of the circuit board assembly of the camera module shown in FIG. 4;
  • FIG. 7 is a schematic cross-sectional view of an embodiment of the circuit board assembly of the camera module shown in FIG. 4 at line C-C;
  • FIG. 8 is a partial structural schematic diagram of the circuit board assembly of the camera module shown in FIG. 4;
  • Fig. 9 is a partial structural schematic diagram of the circuit board assembly of the camera module shown in Fig. 4;
  • Fig. 10 is a partial structural schematic diagram of the circuit board assembly of the camera module shown in Fig. 4;
  • Figure 11 is a schematic structural diagram of another embodiment of the reinforcing plate shown in Figure 6;
  • FIG. 12 is a schematic cross-sectional view of another embodiment of the circuit board assembly of the camera module of FIG. 4 at line C-C;
  • Figure 13 is a schematic structural diagram of yet another embodiment of the reinforcing plate shown in Figure 6;
  • FIG. 14 is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module shown in FIG. 4 at the C-C line;
  • 15a is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the line C-C;
  • 15b is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at line C-C;
  • 15c is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the line C-C;
  • 15d is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the C-C line;
  • 15e is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at line C-C;
  • Figure 16 is a schematic structural diagram of yet another embodiment of the reinforcing plate shown in Figure 6;
  • 17 is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the line C-C;
  • Figure 18 is a schematic structural diagram of yet another embodiment of the reinforcing plate shown in Figure 6;
  • 19 is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the line C-C;
  • Figure 20 is a schematic structural diagram of yet another embodiment of the reinforcing plate shown in Figure 6;
  • 21 is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the C-C line;
  • FIG. 22 is a schematic cross-sectional view of still another embodiment of the circuit board assembly of the camera module of FIG. 4 at the line C-C.
  • FIG. 1 is a schematic structural diagram of an electronic device 100 provided by an embodiment of the present application.
  • the electronic device 100 may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, an in-vehicle device, a wearable device, Devices with camera modules, such as augmented reality (AR) glasses, AR helmets, virtual reality (VR) glasses or VR helmets.
  • the electronic device 100 of the embodiment shown in FIG. 1 is described by taking a mobile phone as an example.
  • FIG. 2 is a partial exploded schematic diagram of the electronic device 100 shown in FIG. 1 .
  • the electronic device 100 includes a casing 10 , a screen 20 , a host circuit board 30 and a camera module 40 .
  • FIGS. 1 , 2 and the following related drawings only schematically show some components included in the electronic device 100 , and the actual shapes, actual sizes, actual positions and actual structures of these components are not affected by those shown in FIGS. 1 and 10 . 2 and the accompanying drawings below.
  • the electronic device 100 may also not include the screen 20 and the host circuit board 30 .
  • the width direction of the electronic device 100 is defined as the X axis.
  • the length direction of the electronic device 100 is the Y axis.
  • the thickness direction of the electronic device 100 is the Z axis. It can be understood that, the coordinate system setting of the electronic device 100 can be flexibly set according to specific actual needs.
  • the housing 10 includes a frame 11 and a back cover 12 .
  • the back cover 12 is fixed on one side of the frame 11 .
  • the back cover 12 is fixedly connected to the frame 11 by adhesive.
  • the rear cover 12 and the frame 11 are integrally formed, that is, the rear cover 12 and the frame 11 are an integral structure.
  • the housing 10 may also include a middle plate (not shown).
  • the middle plate is connected to the inner surface of the frame 11 .
  • the middle plate is opposite to and spaced apart from the rear cover 12 .
  • the screen 20 is fixed on the other side of the frame 11 .
  • the screen 20 is disposed opposite to the back cover 12 .
  • the screen 20 , the frame 11 and the back cover 12 together enclose the interior of the electronic device 100 .
  • the interior of the electronic device 100 may be used to place components of the electronic device 100 , such as a battery, a receiver, or a microphone.
  • the screen 20 may be used to display images.
  • the screen 20 may be a flat screen or a curved screen.
  • the screen 20 includes a first cover 21 and a display screen 22.
  • the first cover plate 21 is stacked on the display screen 22 .
  • the first cover plate 21 can be disposed close to the display screen 22 , and can be mainly used for protecting and dustproofing the display screen 22 .
  • the material of the first cover plate 21 can be, but not limited to, glass.
  • the display screen 22 can adopt an organic light-emitting diode (organic light-emitting diode, OLED) display screen, an active matrix organic light emitting diode or an active matrix organic light emitting diode (active-matrix organic light-emitting diode, AMOLED) display screen , quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display, etc.
  • OLED organic light-emitting diode
  • AMOLED active matrix organic light emitting diode
  • QLED quantum dot light emitting diode
  • FIG. 3 is a partial cross-sectional schematic diagram of the electronic device 100 shown in FIG. 1 at the line A-A.
  • the host circuit board 30 is fixed inside the electronic device 100 . Specifically, the host circuit board 30 may be fixed to the side of the screen 20 facing the back cover 12 . In other embodiments, when the housing 10 includes a midplane, the host circuit board 30 may be fixed to the surface of the midplane facing the rear cover 12 .
  • the host circuit board 30 may be a rigid circuit board, a flexible circuit board, or a flexible-rigid circuit board.
  • the host circuit board 30 may use an FR-4 dielectric board, a Rogers (Rogers) dielectric board, or a mixed FR-4 and Rogers dielectric board, and so on.
  • FR-4 is the code name for a flame-resistant material grade
  • the Rogers dielectric board is a high-frequency board.
  • the host circuit board 30 may be used to house the chips.
  • the chip may be a central processing unit (central processing unit, CPU), a graphics processing unit (graphics processing unit, GPU), a universal flash storage (universal flash storage, UFS), and the like.
  • the camera module 40 is fixed inside the electronic device 100 . Specifically, the camera module 40 is fixed on the side of the screen 20 facing the back cover 12 . In other embodiments, when the housing 10 includes a middle plate, the camera module 40 can be fixed on the surface of the middle plate facing the rear cover 12 .
  • the host circuit board 30 is provided with an escape space 31 .
  • the shape of the avoidance space 31 is not limited to the rectangular shape shown in FIGS. 1 and 2 .
  • the shape of the host circuit board 30 is not limited to the " ⁇ " shape shown in FIGS. 1 and 2 .
  • the camera module 40 is located in the avoidance space 31 . In this way, in the Z-axis direction, the camera module 40 and the host circuit board 30 have an overlapping area, so as to avoid an increase in the thickness of the electronic device 100 due to the camera module 40 being stacked on the host circuit board 30 .
  • the host circuit board 30 may not be provided with the avoidance space 31 . At this time, the camera module 40 may be stacked on the host circuit board 30 , or disposed at intervals from the host circuit board 30 .
  • the camera module 40 is electrically connected to the host circuit board 30 .
  • the camera module 40 is electrically connected to the CPU through the host circuit board 30 .
  • the CPU receives the user's instruction, the CPU can send a signal to the camera module 40 through the host circuit board 30 to control the camera module 40 to capture images or record videos.
  • the camera module 40 may also directly receive the user's instruction, and take images or record video according to the user's instruction.
  • the rear cover 12 defines a through hole 13 .
  • the through hole 13 communicates the inside of the electronic device 100 to the outside of the electronic device 100 .
  • the electronic device 100 further includes a camera decoration member 51 and a second cover plate 52 .
  • Part of the camera decorations 51 may be fixed on the inner surface of the back cover 12 , and some of the camera decorations 51 are in contact with the hole walls of the through holes 13 .
  • the second cover plate 52 is fixedly connected to the inner surface of the camera decorative piece 51 .
  • the camera trim 51 and the second cover plate 52 separate the inside of the electronic device 100 from the outside of the electronic device 100 , so as to prevent external water or dust from entering the inside of the electronic device 100 through the through hole 13 .
  • the material of the second cover plate 52 is a transparent material. For example, glass or plastic. At this time, ambient light outside the electronic device 100 can enter the interior of the electronic device 100 through the second cover plate 52 .
  • the camera module 40 captures ambient light entering the electronic device 100 .
  • the shape of the through hole 13 is not limited to the circle shown in FIG. 1 and FIG. 2 .
  • the shape of the through hole 13 may also be an ellipse or other irregular shapes.
  • the camera module 40 can also collect ambient light passing through the back cover 12 .
  • the material of the back cover 12 is a transparent material. For example, glass or plastic.
  • the surface of the back cover 12 facing the inside of the electronic device 100 is partially coated with ink, and partially uncoated with ink. At this time, the area where the ink is not applied forms the light-transmitting area.
  • the camera module 40 collects the ambient light. It can be understood that, in the electronic device 100 of this embodiment, the through hole 13 may not be provided, and the camera decorative member 51 and the second cover plate 52 may not be provided.
  • the electronic device 100 has better integrity and lower cost.
  • FIG. 4 is a partially exploded schematic view of the camera module 40 shown in FIG. 2 .
  • the camera module 40 includes an optical lens 41 , a bracket 42 , a filter 43 and a circuit board assembly 44 .
  • the optical lens 41 may be a fixed-focus lens or a zoom lens.
  • the optical lens 41 can be a lens with a voice coil motor as a driving mechanism, or a lens with a memory alloy as a driving mechanism.
  • the specific structure of the optical lens 41 is not limited in this embodiment.
  • the light incident side of the optical lens 41 is disposed opposite to the second cover plate 52 .
  • the optical lens 41 collects the ambient light.
  • the optical lens 41 can collect ambient light propagating along the Z-axis direction.
  • the optical lens 41 may also be a periscope lens.
  • the optical axis direction of the periscope lens can be any direction on the XY plane.
  • Periscope lenses include reflectors. The reflector can reflect ambient light propagating along the Z-axis direction to ambient light propagating along the X-Y plane.
  • the bracket 42 is fixed on the light-emitting side of the optical lens 41 .
  • the bracket 42 can be fixed with the optical lens 41 by glue or adhesive tape.
  • the bracket 42 is provided with a light-transmitting hole 421 .
  • the light-transmitting hole 421 penetrates through the surface of the bracket 42 facing the optical lens 41 and the surface of the bracket 42 away from the optical lens 41 .
  • the light-transmitting hole 421 is not limited to the cylindrical hole shown in FIG. 4 .
  • the filter 43 is fixed on the bracket 42 , and the filter 43 is located in the light-transmitting hole 421 .
  • the filter 43 can be fixed to the hole wall of the light transmission hole 421 by glue or tape.
  • the filter 43 is used to filter the stray light of the ambient light passing through the optical lens 41 , so as to ensure that the image captured by the camera module 40 has better clarity.
  • the filter 43 may be, but is not limited to, a blue glass filter.
  • the filter 43 can also be a reflective infrared filter, or a double-pass filter (the double-pass filter can transmit visible light and infrared light in ambient light at the same time, or allow visible light in ambient light to pass through at the same time. It transmits light of other specific wavelengths (such as ultraviolet light) at the same time, or transmits infrared light and light of other specific wavelengths (such as ultraviolet light) at the same time.).
  • the circuit board assembly 44 is fixed to the side of the bracket 42 away from the optical lens 41 .
  • the circuit board assembly 44 is located on the light-emitting side of the optical lens 41
  • the bracket 42 is located between the circuit board assembly 44 and the optical lens 41 .
  • the side of the circuit board assembly 44 away from the bracket 42 is fixed to the screen 20 .
  • the side of the circuit board assembly 44 away from the bracket 42 may be secured to the surface of the midplane facing the rear cover 12 .
  • FIG. 5 a is a schematic structural diagram of a conventional circuit board assembly 200 .
  • FIG. 5b is a cross-sectional view of the circuit board assembly 200 shown in FIG. 5a at line B-B.
  • the circuit board assembly 200 includes a circuit board 201 , a reinforcing plate 202 , a DA glue 203 , a photosensitive chip 204 and an electronic component 207 .
  • the circuit board 201 is provided with a first through hole 205 .
  • the first through hole 205 penetrates through the bottom surface 2011 of the circuit board 201 and the top surface 2012 of the circuit board 201 .
  • the photosensitive chip 204 is disposed in the first through hole 205 .
  • the photosensitive chip 204 is fixed on the reinforcing plate 202 by the DA glue 203 .
  • the photosensitive chip 204 is electrically connected to the circuit board 201 through gold wires 206 .
  • the electronic component 207 is fixed on the circuit board 201 and is electrically connected to the circuit board 201 .
  • the electronic components 207 may be capacitors, inductors, resistors, or driving chips.
  • the electronic component 207 is used to assist the photosensitive chip 204 to perform signal processing on the collected ambient light.
  • the conventional circuit board assembly 200 has the following drawbacks:
  • the thermal conductivity of the DA glue 203 is approximately 0.3-0.5W/(mxK)
  • the heat generated by the photosensitive chip 204 is easily blocked by the DA glue 203, which makes it difficult to transmit heat to the
  • the reinforcing plate 202 further causes the heat dissipation effect of the photosensitive chip 204 to be poor. In this way, when the circuit board assembly 200 is applied to the camera module, the excessively high temperature will cause serious thermal noise of the camera module and back focus variation of the optical lens.
  • the thermal conductivity refers to the heat transferred through a 1 square meter area within a certain period of time for a material with a thickness of 1 meter and a temperature difference of 1 degree (K, °C) on both sides of the material under stable heat transfer conditions.
  • the unit is watt/(mx degree), which is (W/(mxK).
  • the heat generated by the photosensitive chip 204 can soften the DA glue 203, so that the photosensitive chip 204 is easily separated from the reinforcing plate 202, and the reliability of the circuit board assembly 200 is deteriorated.
  • the DA glue 203 is likely to affect the flatness of the photosensitive chip 204, thereby causing the image captured by the camera module to be unclear or to have distortion problems.
  • connection area between the photosensitive chip 204 and the reinforcing plate 202 is small, and the connection firmness between the photosensitive chip 204 and the reinforcing plate 202 is poor.
  • the heat dissipation efficiency of the photosensitive chip is improved to ensure that the circuit board assembly has a better heat dissipation effect
  • the flatness of the photosensitive chip is improved, and the photosensitive chip and reinforcement
  • the connection firmness between the plates increases the connection reliability between the photosensitive chip and the reinforcing plate.
  • the first embodiment please refer to FIG. 6 , which is a partially exploded schematic view of the circuit board assembly 44 of the camera module 40 shown in FIG. 4 .
  • the circuit board assembly 44 includes a circuit board 441 , a reinforcing plate 442 , a glue material 443 , a photosensitive chip 444 , an injection molded part 445 and an electronic component 446 .
  • the circuit board 441 may be a rigid circuit board, a flexible circuit board, or a flexible-rigid circuit board.
  • the circuit board 441 may use an FR-4 dielectric board, a Rogers (Rogers) dielectric board, or a mixed media board of Rogers and FR-4, and the like.
  • the circuit board 441 includes a bottom surface 4411 and a top surface 4412 facing oppositely.
  • the circuit board 441 is provided with a first through hole 4413 .
  • the first through holes 4413 penetrate through the bottom surface 4411 of the circuit board 441 and the top surface 4412 of the circuit board 441 .
  • the top surface 4412 of the circuit board 441 faces the optical lens 41 .
  • the bottom surface 4411 of the circuit board 441 faces the screen 20 .
  • the circuit board 441 may be electrically connected to the host circuit board 30 . At this time, the circuit board 441 and the host circuit board 30 can transmit signals to each other.
  • the reinforcing plate 442 may be a material with relatively high hardness, such as a steel sheet, a copper sheet, a ceramic sheet, and a copper alloy sheet.
  • the reinforcing plate 442 includes a bottom plate 4421 and a boss 4422 .
  • the boss 4422 is connected to a surface of the bottom plate 4421 .
  • the bosses 4422 and the bottom plate 4421 may be integrally formed into a structure, that is, the bosses 4422 and the bottom plate 4421 are integral.
  • the boss 4422 can also be fixed to the bottom plate 4421 by means of bonding, welding or screw connection.
  • the number of the bosses 4422 is plural.
  • the number of the bosses 4422 is not limited to the four illustrated in FIG. 6 .
  • the plurality of bosses 4422 are spaced apart and surrounded by a ring structure. The space between every two bosses 4422 forms a flow channel 4420 .
  • the shape of each boss 4422 is not limited to the " ⁇ " shape illustrated in FIG. 6 .
  • each boss 4422 may also be in the shape of a block or a strip.
  • the shape enclosed by the plurality of bosses 4422 is not limited to the annular structure.
  • the shape enclosed by the plurality of bosses 4422 may also be a " ⁇ " shape, a " ⁇ " shape, a " ⁇ ” shape, or the like.
  • FIG. 7 is a schematic cross-sectional view of an embodiment of the circuit board assembly 44 of the camera module 40 shown in FIG. 4 at line C-C.
  • FIG. 8 is a partial structural schematic diagram of the circuit board assembly 44 of the camera module 40 shown in FIG. 4 .
  • the bottom plate 4421 is fixed to the bottom surface 4411 of the circuit board 441 .
  • the bottom plate 4421 can be fixed to the bottom surface 4411 of the circuit board 441 by adhesive tape or glue.
  • the bottom plate 4421 can greatly improve the overall strength of the circuit board 441, thereby ensuring that the circuit board 441 is not easily broken.
  • the bottom plate 4421 can also be fixed to the bottom surface 4411 of the circuit board 441 by welding or screwing.
  • the boss 4422 is located in the first through hole 4413 .
  • the flow channel 4420 communicates with the first through hole 4413 .
  • the circuit board 441 is arranged around the boss 4422 .
  • some of the bosses 4422 are located inside the first through holes 4413 , and some of the bosses 4422 are located outside the first through holes 4413 . In one embodiment, all of the bosses 4422 are located in the first through holes 4413 .
  • FIG. 9 is a partial structural schematic diagram of the circuit board assembly 44 of the camera module 40 shown in FIG. 4 .
  • the adhesive material 443 is fixed on the surface of the boss 4422 away from the bottom plate 4421 .
  • the quantity of the glue material 443 is the same as the quantity of the bosses 4422 .
  • the shape of the glue material 443 may be the same as the shape of the boss 4422 , that is, the shape of each glue material 443 is approximately in a " ⁇ " shape.
  • the glue material 443 is DA glue.
  • FIG. 10 is a partial structural schematic diagram of the circuit board assembly 44 of the camera module 40 shown in FIG. 4 .
  • a surface of the photosensitive chip 444 includes a photosensitive area 4441 (also referred to as a sensing area) and a non-photosensitive area 4442 (also referred to as a non-sensitive area).
  • the non-photosensitive area 4442 is connected to the periphery of the photosensitive area 4441 .
  • the photosensitive area 4441 can be used to collect ambient light.
  • the non-photosensitive area 4442 can be used for wiring.
  • the photosensitive chip 444 is fixed on the surface of the adhesive material 443 away from the boss 4422 .
  • the photosensitive chip 444 is fixed on the reinforcing plate 442 by the adhesive material 443 .
  • the photosensitive area 4441 of the photosensitive chip 444 faces away from the adhesive material 443 .
  • the photosensitive chip 444 and the circuit board 441 are located on the same side of the reinforcing plate 442 .
  • the photosensitive chip 444 , the adhesive material 443 , the bosses 4422 and part of the bottom plate 4421 enclose a space. It can be understood that, because the boss 4422 has greater hardness, the boss 4422 can stably support the photosensitive chip 444 .
  • the photosensitive chip 444 is electrically connected to the circuit board 441 .
  • the photosensitive chip 444 may be electrically connected to the circuit board 441 through conductive wires such as gold wires or copper wires.
  • the periphery of the photosensitive chip 444 is connected to the plurality of bosses 4422 .
  • the photosensitive chip 444 is not easily inclined.
  • the photosensitive chip 444 has better stability.
  • the plurality of bosses 4422 may also be connected to other positions of the photosensitive chip 444 , for example, the middle of the photosensitive chip 444 .
  • the photosensitive area 4441 of the photosensitive chip 444 is facing the filter 43 , that is, the photosensitive area 4441 of the photosensitive chip 444 faces the optical lens 41 .
  • the filter 43 filters the stray light of the ambient light passing through the optical lens 41 .
  • the ambient light propagates to the photosensitive chip 444 .
  • the photosensitive area 4441 of the photosensitive chip 444 collects ambient light.
  • the photosensitive chip 444 forms electrical signals.
  • the electrical signals are transmitted to the host circuit board 30 via the circuit board 441 .
  • the host circuit board 30 processes the electrical signals and controls the screen 20 to display the captured images.
  • the electronic component 446 is fixed on the top surface 4412 of the circuit board 441 and is electrically connected to the circuit board 441 .
  • the electronic components 446 may be capacitors, inductors, resistors, or driving chips.
  • the electronic component 446 is used to assist the photosensitive chip 444 to perform signal processing on the collected ambient light.
  • the injection-molded part 445 is an integrally formed structural part.
  • the injection molded part 445 includes a first part 4451 (also referred to as a second injection molded part) and a second part 4452 (also referred to as a first injection molded part) connecting the first part 4451 .
  • the first part 4451 is used to package the electronic components 446 on the circuit board 441 .
  • the first portion 4451 is fixed on the top surface 4412 of the circuit board 441 and covers the electronic component 446 . It should be understood that the first part 4451 may completely cover the electronic component 446 or partially cover the electronic component 446 , that is, a part of the electronic component 446 is exposed relative to the first part 4451 .
  • first portion 4451 is also disposed in the first through hole 4413 , and the first portion 4451 covers the non-photosensitive area 4442 of the photosensitive chip 444 and covers the conductive line electrically connected between the photosensitive chip 444 and the circuit board 441 .
  • the photosensitive region 4441 of the photosensitive chip 444 is exposed relative to the first portion 4451 .
  • the second portion 4452 of the injection molded part 445 is located on the side of the photosensitive chip 444 facing the reinforcing plate 442 .
  • the second portion 4452 is connected between the photosensitive chip 444 and the reinforcing plate 442 .
  • the second portion 4452 is located in the area surrounded by the plurality of bosses 4422 and in the flow channel 4420 between two adjacent bosses 4422 .
  • the injection molded part 445 can package the circuit board 441 , the reinforcing plate 442 , the photosensitive chip 444 and the electronic component 446 into one body.
  • the integrity of the circuit board assembly 44 is better.
  • the connection firmness between the circuit board 441 , the reinforcing plate 442 , the photosensitive chip 444 and the electronic component 446 is good.
  • the injection molded part 445 may be formed by a molding on chip (MOC) process. Specifically, the fixed circuit board 441 , the reinforcing plate 442 , the photosensitive chip 444 and the electronic component 446 are placed in the mold cavity. At this time, the encapsulation material is extruded into the mold cavity, so that part of the encapsulation material is located on the top surface 4412 of the circuit board 441 and covers the electronic component 446 . Part of the packaging material flows into the first through hole 4413 and covers the non-photosensitive area 4442 of the photosensitive chip 444 and the conductive lines electrically connected between the photosensitive chip 444 and the circuit board 441 .
  • MOC molding on chip
  • part of the packaging material flows into the space surrounded by the photosensitive chip 444 , the adhesive material 443 , the bosses 4422 and part of the bottom plate 4421 through the first through holes 4413 and the flow channel 4420 between each two bosses 4422 .
  • the encapsulating material forms an injection molded part 445 of an integral molding structure.
  • the material of the injection molded part 445 is epoxy molding compound (EMC).
  • EMC epoxy molding compound
  • Epoxy molding compound is also known as epoxy molding compound. It can be understood that EMC is a powder molding compound which is made of epoxy resin as matrix resin, high-performance phenolic resin as curing agent, adding fillers such as alumina fine powder, and adding various additives.
  • the injection molded part 445 can also use other packaging materials.
  • the bracket 42 can be fixed to the injection molding 445 .
  • the bracket 42 can also be fixed to the circuit board 441 .
  • the thermal conductivity of the injection molded part 445 is greater than the thermal conductivity of the adhesive material 443 .
  • the heat transfer efficiency of the injection molded part 445 is higher than that of the adhesive material 443 .
  • the heat generated by the photosensitive chip 444 can be quickly transmitted to the reinforcing plate 442 through the injection molded part 445 , and then transmitted to the outside of the camera module 40 through the reinforcing plate 443 , thereby effectively solving the problem that the heat of the photosensitive chip 444 is caused by the thermal conductivity of the adhesive material 443 .
  • the problem is that the coefficient is low and cannot be derived in time.
  • a circuit board assembly 44 is described in detail above in conjunction with the relevant drawings. It can be understood that, in this embodiment, a reinforcing plate 442 with a boss 4422 is provided, and the photosensitive chip 444 is raised by the boss 4422, thereby forming a new space between the photosensitive chip 444 and the reinforcing plate 442. . At this time, the second portion 4452 of the injection molded part 445 is disposed in the space between the photosensitive chip 444 and the reinforcing plate 442 . At this time, most of the outer surface of the photosensitive chip 444 is covered by the injection molded part 445 , that is, the contact area between the injection molded part 445 and the photosensitive chip 444 is relatively large. The connection firmness of the photosensitive chip 444 and the injection molded part 445 is better.
  • the thermal conductivity of the injection molded part 445 is greater than the thermal conductivity of the adhesive material 443 , the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the injection molded part 445 , and the camera module can be led out through the reinforcing plate 442 40, that is, the heat generated by the photosensitive chip 444 will not be difficult to transmit to the reinforcing plate 442 due to the low thermal conductivity of the adhesive material 443.
  • the contact area between the photosensitive chip 444 and the injection molded part 445 is larger, and the heat dissipation effect of the photosensitive chip 444 is better.
  • the thermal noise of the camera module 40 is low, and the back focus of the camera module 40 is less likely to vary.
  • the heat transfer path to the outside of the camera module 40 is short, and the heat dissipation efficiency of the photosensitive chip 444 is high.
  • the heat generated by the photosensitive chip 444 can also be transferred to the outside of the camera module 40 through the first part 4451 . In this way, the contact area between the photosensitive chip 444 and the injection molded part 445 is further increased. The heat dissipation effect of the photosensitive chip 444 is better.
  • the adhesive material 443 does not easily affect the flatness of the photosensitive chip 444 , so as to avoid problems such as unclearness or distortion of the image captured by the camera module 40 .
  • the injection molded part 445 can also be used to package the circuit board 441 , the reinforcing plate 442 , the photosensitive chip 444 and the electronic component 446 into one body, thereby ensuring better structural strength of the circuit board assembly 44 .
  • the injection molded part 445 of this embodiment has the effect of "multiple uses for one object".
  • the thermal conductivity of the injection molded part 445 is greater than or equal to 2W/(mxK). Compared with the thermal conductivity of the adhesive material 443 of 0.3-0.5W/(mxK), the thermal conductivity of the injection molded part 445 is much larger than that of the adhesive material 443 . At this time, the heat generated by the photosensitive chip 444 can be dissipated at a faster speed, and the heat dissipation effect of the photosensitive chip 444 is better.
  • FIG. 11 is a schematic structural diagram of another embodiment of the reinforcing plate 442 shown in FIG. 6 .
  • the reinforcing plate 442 includes the bumps 4423 .
  • the protrusions 4423 and the protrusions 4422 are located on the same side of the bottom plate 4421 .
  • the shape of the bump 4423 is not limited to the rectangular parallelepiped shown in FIG. 11 .
  • the shape of the bump 4423 can also be a triangular prism, a cylinder or a sphere.
  • the bump 4423 is located in the area surrounded by the plurality of bosses 4422 .
  • the protrusions 4423 may also be disposed outside the area surrounded by the plurality of protrusions 4422 .
  • bumps 4423 may be located within flow channels 4420 between two bosses 4422.
  • the bumps 4423 are fixed to the bottom plate 4421 .
  • the protrusions 4423 and the bottom plate 4421 are integrally formed.
  • the protrusions 4423 may also be fixed to the bottom plate 4421 by means of bonding, welding, or screwing.
  • the number of bumps 4423 is plural.
  • the plurality of bumps 4423 are arranged in an array.
  • the plurality of bumps 4423 may also be randomly arranged.
  • the number of bumps 4423 may also be one.
  • FIG. 12 is a schematic cross-sectional view of another embodiment of the circuit board assembly 44 of the camera module 40 of FIG. 4 at the line C-C.
  • FIG. 12 schematically distinguishes the bump 4423 and the bottom plate 4421 by the dotted line.
  • the bump 4423 is opposite to the photosensitive chip 444 .
  • the second portion 4452 of the injection molded part 445 covers the bump 4423 .
  • the contact area between the reinforcing plate 442 of the present embodiment and the injection molded part 445 is larger.
  • the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 via the injection molded part 445 , and then transferred to the outside of the camera module 40 via the reinforcing plate 442 .
  • the heat dissipation effect of the circuit board assembly 44 is better.
  • FIG. 13 is a schematic structural diagram of still another embodiment of the reinforcing plate 442 shown in FIG. 6 .
  • FIG. 14 is a schematic cross-sectional view of still another embodiment of the circuit board assembly 44 of the camera module 40 shown in FIG. 4 at the line C-C.
  • the bottom plate 4421 is provided with a second through hole 4424 .
  • the second through hole 4424 penetrates from the surface of the bottom plate 4421 facing the photosensitive chip 444 to the surface of the bottom plate 4421 away from the photosensitive chip 444 .
  • the second through hole 4424 faces the photosensitive chip 444 , and the second through hole 4424 is located in the area surrounded by the plurality of bosses 4422 .
  • the second portion 4452 of the injection molded part 445 is disposed in the second through hole 4424 . At this time, part of the heat generated by the photosensitive chip 444 can be directly transferred to the outside of the camera module 40 through the injection molded part 445 , and the heat dissipation effect of the photosensitive chip 444 is better.
  • the number of the second through holes 4424 is multiple.
  • the plurality of second through holes 4424 are arranged in an array.
  • the plurality of second through holes 4424 may also be randomly arranged.
  • the size of the second through hole 4424 may occupy the area surrounded by the plurality of bosses 4422 , or may be a part of the area surrounded by the plurality of bosses 4422 .
  • the second through holes 4424 may also be disposed outside the area surrounded by the plurality of bosses 4422 .
  • FIG. 15a is another embodiment of the circuit board assembly 44 of the camera module 40 in FIG. 4 at the CC line cross-sectional schematic diagram.
  • the bottom plate 4421 is provided with a groove 4425 .
  • the opening of the groove 4425 is located on the surface of the bottom plate 4421 facing the photosensitive chip 444 .
  • the groove 4425 is facing the photosensitive chip 444 , and the groove 4425 is located in the area surrounded by the plurality of bosses 4422 .
  • the number of grooves 4425 is plural.
  • the plurality of grooves 4425 are arranged in an array.
  • the second portion 4452 of the injection molded part 445 is disposed within the groove 4425 .
  • the contact area between the reinforcing plate 442 of the present embodiment and the injection molded part 445 is larger.
  • the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the injection molding 445 at a relatively fast speed, and then transferred to the outside of the camera module 40 through the reinforcing plate 442 . In this way, the heat dissipation effect of the circuit board assembly 44 is better.
  • the plurality of grooves 4425 may also be randomly arranged.
  • the number of grooves 4425 may also be one.
  • the size of the groove 4425 can fill the area surrounded by the plurality of bosses 4422 .
  • the grooves 4425 may also be disposed outside the area surrounded by the plurality of bosses 4422 .
  • FIG. 15b is another embodiment of the circuit board assembly 44 of the camera module 40 in FIG. 4 at the CC line cross-sectional schematic diagram.
  • the surface of the photosensitive chip 444 away from the reinforcing plate 442 is exposed relative to the first part 4451 of the injection molded part 445 , that is, the first part 4451 does not cover the surface of the photosensitive chip 444 away from the reinforcing plate 442 .
  • the thickness of the circuit board assembly 44 is relatively thin, which is beneficial to the thinning and light-weight setting of the circuit board assembly 44 .
  • FIG. 15c is another embodiment of the circuit board assembly 44 of the camera module 40 in FIG. 4 at the CC line.
  • the structure of the injection molded part 445 of this embodiment is the structure of the second part 4452 of the injection molded part 445 of the first embodiment, that is, the injection molded part 445 of this embodiment does not include the first part of the injection molded part 445 of the first embodiment 4451.
  • the injection molded part 445 is connected between the photosensitive chip 444 and the reinforcing plate 442 . At this time, the cost of the circuit board assembly 44 is less, and the circuit board assembly 44 can be set in a light weight.
  • FIG. 15d is another embodiment of the circuit board assembly 44 of the camera module 40 in FIG. 4 at the CC line cross-sectional schematic diagram.
  • the reinforcing plate 442 is fixed to the bottom surface 4411 of the circuit board 441 .
  • the photosensitive chip 444 is disposed in the first through hole 4413 and fixed on the reinforcing plate 442 by the adhesive material 443 .
  • the circuit board 441 is arranged around the photosensitive chip 444 .
  • a space S is enclosed by the photosensitive chip 444 and the reinforcing plate 442 of the adhesive material 443 .
  • the space S communicates with the first through hole 4413 .
  • the second portion 4452 of the injection molded part 445 is disposed in the space S.
  • the second portion 4452 is located in the area surrounded by the plurality of glue materials 443 and in the space between two adjacent glue materials 443 .
  • the second part 4452 of the injection molded part 445 is arranged in the space S. In this way, the connection area between the injection molded part 445 and the photosensitive chip 444 is larger. The connection firmness of the photosensitive chip 444 and the injection molded part 445 is better.
  • the thermal conductivity of the injection molded part 445 is greater than the thermal conductivity of the adhesive material 443
  • the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the injection molded part 445, and then exported through the reinforcing plate 442, that is, the photosensitive chip
  • the heat generated by 444 will not be difficult to transmit to the reinforcing plate 442 due to the low thermal conductivity of the adhesive material 443 .
  • the contact area between the photosensitive chip 444 and the injection molded part 445 is larger, and the heat dissipation effect of the photosensitive chip 444 is better.
  • the thermal noise of the camera module 40 is low, and the back focus of the camera module 40 is less likely to vary.
  • the heat transfer path to the outside of the camera module 40 is short, and the heat dissipation efficiency of the photosensitive chip 444 is high.
  • FIG. 15e is a schematic cross-sectional view of another embodiment of the circuit board assembly 44 of the camera module 40 of FIG. 4 at the line C-C.
  • the reinforcing plate 442 is provided with a recessed area 447 .
  • the recessed area 447 communicates with the space S.
  • the second portion 4452 of the injection molded part 445 is disposed in the recessed area 447 .
  • the contact area between the reinforcing plate 442 of the present embodiment and the injection molded part 445 is larger.
  • the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 via the injection molded part 445 , and then transferred to the outside of the camera module 40 via the reinforcing plate 442 .
  • the heat dissipation effect of the circuit board assembly 44 is better.
  • FIG. 16 is a schematic structural diagram of another embodiment of the reinforcing plate 442 shown in FIG. 6 .
  • the number of the bosses 4422 is one.
  • the shape of the boss 4422 is not limited to the square shown in FIG. 16 .
  • the shape of the boss 4422 may also be cylindrical.
  • the boss 4422 is located in the middle of the bottom plate 4421 . In other embodiments, the bosses 4422 may also be located at other positions on the bottom plate 4421 .
  • FIG. 17 is a schematic cross-sectional view of still another embodiment of the circuit board assembly 44 of the camera module 40 of FIG. 4 at the line C-C.
  • the second part 4452 of the injection molded part 445 is disposed around the boss 4422 , and the second part 4452 is connected to the boss 4422 .
  • FIG. 17 schematically distinguishes the first part 4451 and the second part 4452 of the injection molded part 445 by the dotted line.
  • a boss 4422 is fixedly connected to the bottom plate 4421, and the photosensitive chip 444 is raised by the boss 4422, thereby forming a new space between the periphery of the photosensitive chip 444 and the bottom plate 4421.
  • the second portion 4452 of the injection molded part 445 is disposed around the boss 4422 and connected to the boss 4422 . In this way, the connection area between the injection molded part 445 and the photosensitive chip 444 is larger. The connection firmness of the photosensitive chip 444 and the injection molded part 445 is better.
  • the thermal conductivity of the injection molded part 445 is greater than the thermal conductivity of the adhesive material 443
  • the heat generated by the photosensitive chip 444 can be quickly transmitted to the reinforcing plate 442 through the injection molded part 445, and then exported through the reinforcing plate 442, that is, The heat generated by the photosensitive chip 444 will not be difficult to transmit to the reinforcing plate 442 due to the low thermal conductivity of the adhesive material 443 . At this time, the heat dissipation effect of the photosensitive chip 444 is better.
  • the fifth embodiment can also be combined with the second to fifth embodiments to form a new embodiment. The details are not repeated here.
  • FIG. 18 is a schematic structural diagram of another embodiment of the reinforcing plate 442 shown in FIG. 6 .
  • FIG. 19 is a schematic cross-sectional view of still another embodiment of the circuit board assembly 44 of the camera module 40 of FIG. 4 at the line C-C.
  • the circuit board assembly 44 includes a circuit board 441 , a reinforcing plate 442 , a glue material 443 , a photosensitive chip 444 , a cooling liquid 445 and an electronic component 446 .
  • the reinforcing plate 442 includes a bottom plate 4421 and a boss 4422 .
  • the boss 4422 has an annular structure.
  • the shape of the boss 4422 of the annular structure is not limited to the rectangle shown in FIG. 18 .
  • connection relationship between the boss 4422 and the bottom plate 4421 please refer to the connection relationship between the boss 4422 and the bottom plate 4421 in the first embodiment.
  • the photosensitive chip 444 is fixed on the boss 4422 by the adhesive material 443 .
  • the photosensitive chip 444 , the glue material 443 , the bosses 4422 and a part of the bottom plate 4421 enclose the accommodating cavity 446 .
  • the accommodating cavity 446 substantially forms a sealed space.
  • cooling liquid 445 is provided in the accommodating cavity 446 .
  • the cooling liquid 445 is in contact with the photosensitive chip 444 , the bosses 4422 and the bottom plate 4421 .
  • the cooling liquid 445 may be purified water, glycerin, glycol solution and other liquids.
  • the cooling liquid 445 can also be a liquid metal, such as sodium potassium alloy.
  • a reinforcing plate 442 with an annular boss 4422 is provided, and the photosensitive chip 444 is raised by the boss 4422, thereby forming a new structure between the photosensitive chip 444 and the reinforcing plate 442. space, that is, the space of the accommodating cavity 446 .
  • the cooling liquid 445 is provided in the accommodating cavity 446 . In this way, when the photosensitive chip 444 generates heat, the cooling liquid 445 can absorb the heat, and transmit the absorbed heat to the outside of the camera module 40 through the reinforcing plate 442 , thereby achieving the effect of reducing the photosensitive chip 444 . Therefore, the heat dissipation effect of the photosensitive chip 444 of this embodiment is better.
  • the assembly steps of the circuit board assembly 44 of this embodiment can be referred to as follows:
  • the bottom plate 4421 is fixed to the bottom surface 4411 of the circuit board 441 , and part or all of the bosses 4422 are located in the first through holes 4413 .
  • the cooling liquid 445 is filled in the area surrounded by the boss 4422 and the bottom plate 4421 .
  • the photosensitive chip 444 is fixed on the boss 4422 by the adhesive material 443 .
  • the cooling liquid 445 is sealed in the accommodating cavity 446 surrounded by the photosensitive chip 444 , the adhesive material 443 , the boss 4422 and the bottom plate 4421 .
  • the eighth implementation manner may also refer to the setting manner of the second implementation manner.
  • bumps are provided in the accommodating cavity 446 .
  • the contact area between the cooling liquid 445 and the reinforcing plate 442 is larger. In this way, the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the cooling liquid 445 , and then transferred to the outside of the camera module 40 through the reinforcing plate 442 .
  • the heat dissipation effect of the circuit board assembly 44 is better.
  • the eighth implementation manner may also refer to the setting manner of the fourth implementation manner.
  • grooves are provided in the accommodating cavity 446 .
  • the contact area between the cooling liquid 445 and the reinforcing plate 442 is larger. In this way, the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the cooling liquid 445 , and then transferred to the outside of the camera module 40 through the reinforcing plate 442 .
  • the heat dissipation effect of the circuit board assembly 44 is better.
  • FIG. 20 is a schematic structural diagram of another embodiment of the reinforcing plate 442 shown in FIG. 6 .
  • FIG. 21 is a schematic cross-sectional view of still another embodiment of the circuit board assembly 44 of the camera module 40 of FIG. 4 at the line C-C.
  • the bottom plate 4421 includes a first plate 4226 and a second plate 4227 .
  • the second board 4227 is stacked on the first board 4226 , and the second board 4227 is fixedly connected to the first board 4226 .
  • the second plate member 4227 may be fixed to the first plate member 4226 by means of bonding or welding.
  • the bottom plate 4421 of the sixth embodiment is an integrally formed structure. In the bottom plate 4421 of this embodiment, the first plate 4226 and the second plate 4227 are fixedly connected to each other by means of bonding or welding.
  • the boss 4422 is fixed to the surface of the second plate 4227 away from the first plate 4226 .
  • the second plate 4227 , the glue 443 , the bosses 4422 and the photosensitive chip 444 enclose a receiving cavity 446 .
  • the second plate member 4227 is provided with a second through hole 4228 .
  • the second through holes 4228 penetrate through the surface of the second plate member 4227 facing the photosensitive chip 444 and the surface of the second plate member 4227 away from the photosensitive chip 444 .
  • the second through hole 4228 communicates with the accommodating cavity 446 .
  • a part of the cooling liquid 445 is disposed in the second through hole 4228 .
  • the volume of the cooling liquid 445 of the present embodiment is larger than that of the cooling liquid 445 of the eighth embodiment. In this way, the cooling liquid 445 can absorb more heat generated by the photosensitive chip 444 .
  • the heat dissipation effect of the photosensitive chip 444 is better.
  • the assembly steps of the circuit board assembly 44 of this embodiment can be referred to as follows:
  • the second board member 4227 of the bottom plate 4421 is fixed to the bottom surface 4411 of the circuit board 441 , and part or all of the bosses 4422 are located in the first through holes 4213 .
  • the photosensitive chip 444 is fixed on the boss 4422 by the adhesive material 443 .
  • the photosensitive chip 444 , the bosses 4422 and the bottom plate 4421 enclose a receiving cavity 446 .
  • the assembled photosensitive chip 444 , the circuit board 441 and the second board member 4227 are turned 180°, and the accommodating cavity 446 is filled with the cooling liquid 445 through the second through hole 4228 .
  • the cooling liquid 445 fills the accommodating cavity 446 and the second through hole 4228 .
  • the first board 4226 is bonded to the surface of the second board 4227 away from the circuit board 441 , and the first board 4226 covers the second through hole 4228 . In this way, the cooling liquid 445 is sealed in the accommodating cavity 446 and the second through hole 4228 .
  • the ninth implementation manner may also refer to the setting manner of the second implementation manner.
  • the bumps are fixed on the surface of the first board member 4226 facing the photosensitive chip 444 . Part or all of the bumps are located in the second through holes 4228 . At this time, the contact area between the cooling liquid 445 and the reinforcing plate 442 is larger. In this way, the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the cooling liquid 445 , and then transferred to the outside of the camera module 40 through the reinforcing plate 442 . The heat dissipation effect of the circuit board assembly 44 is better.
  • the ninth implementation manner may also refer to the setting manner of the fourth implementation manner.
  • the first plate 4226 is provided with grooves.
  • the opening of the groove is located on the surface of the first plate member 4226 facing the photosensitive chip 444 .
  • Part of the cooling liquid 445 is provided in the groove. In this way, the contact area between the cooling liquid 445 and the reinforcing plate 442 is larger. In this way, the heat generated by the photosensitive chip 444 can be quickly transferred to the reinforcing plate 442 through the cooling liquid 445 , and then transferred to the outside of the camera module 40 through the reinforcing plate 442 .
  • the heat dissipation effect of the circuit board assembly 44 is better.
  • FIG. 22 is another embodiment of the circuit board assembly 44 of the camera module 40 in FIG. 4 at the CC line cross-sectional schematic diagram.
  • Circuit board assembly 44 also includes injection molded parts 4229 .
  • the injection molded parts 4229 are used to package the electronic components 446 on the circuit board 441 .
  • part of the injection molded part 4229 is fixed on the top surface 4412 of the circuit board 441 and covers the electronic component 446 .
  • a part of the injection molded part 4229 may completely cover the electronic component 446 , or may partially cover the electronic component 446 , that is, a part of the electronic component 446 is exposed relative to the injection molded part 4229 .
  • part of the injection molded part 4229 is located in the first through hole 4413 .
  • Part of the injection molded part 4229 covers the non-photosensitive area 4442 of the photosensitive chip 444 .
  • the photosensitive area 4441 of the photosensitive chip 444 is exposed relative to the injection molded part 4229 .
  • the injection molded part 4229 encapsulates the circuit board 441 , the reinforcing plate 442 , the photosensitive chip 444 and the electronic component 446 into one body.
  • the integrity of the circuit board assembly 44 is better.
  • the connection firmness between the circuit board 441 , the reinforcing plate 442 , the photosensitive chip 444 and the electronic component 446 is good.
  • the material of the injection part 4229 can refer to the material of the injection part 445 of the first embodiment. I won't go into details here.
  • the formation method of the injection molded part 4229 may refer to the formation method of the injection molded part 445 of the first embodiment.
  • the heat generated by the photosensitive chip 444 can also be transferred out of the camera module 40 through the part of the injection molded part 4229 .
  • the heat dissipation effect of the photosensitive chip 444 is better.
  • the photosensitive chip 444 can not only dissipate heat through the cooling liquid, but also dissipate heat through the injection molded part 4229 . Therefore, the heat dissipation effect of the photosensitive chip 444 of this embodiment is better.
  • the tenth embodiment can also be combined with the ninth embodiment to form a new embodiment. The details are not repeated here.
  • circuit board assemblies 44 The structures of several circuit board assemblies 44 are described in detail above in conjunction with the relevant drawings.
  • the photosensitive chips 444 of several circuit board assemblies 44 of the present application have higher heat dissipation efficiency, and the heat dissipation effect of the circuit board assemblies 44 is better.
  • the connection firmness is good, and the connection reliability between the photosensitive chip 444 and the reinforcing plate 442 is good.
  • the above circuit board assembly 44 is described as being applied to the camera module 40 as an example.
  • the circuit board assembly 44 of the present application may also be applied in other fields.
  • the circuit board assembly 44 may be applied to a fingerprint module.
  • the chip of the circuit board assembly is a fingerprint chip.
  • the heat dissipation efficiency of the fingerprint chip is high, and the heat dissipation effect of the circuit board assembly is better.
  • the connection between the fingerprint chip and the reinforcing plate is firm, and the connection between the fingerprint chip and the reinforcing plate is reliable. Sex is better.

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Abstract

本申请提供一种电路板组件、摄像模组及电子设备。电路板组件包括补强板、胶材、芯片、第一注塑件以及电路板。胶材固定于补强板的表面。芯片固定于胶材远离补强板的表面。补强板、胶材以及芯片围出一空间。第一注塑件位于该空间内,且第一注塑件连接于芯片与补强板之间。第一注塑件的导热系数大于胶材的导热系数。此时,感光芯片产生的热量能够经第一注塑件快速地传输至补强板,并经补强板导出。故而,电路板组件的散热效果较佳。当电路板组件应用于摄像模组以及电子设备时,摄像模组以及电子设备的散热效果也较佳。

Description

电路板组件、摄像模组及电子设备
本申请要求于2020年09月18日提交中国专利局、申请号为202022071879.2、申请名称为“电路板组件、摄像模组及电子设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电路板技术领域,尤其涉及一种电路板组件、摄像模组及电子设备。
背景技术
随着手机技术的日趋发展,手机电路板设置的芯片的种类越来越多。为了能够减小电路板与芯片的整体厚度,传统的电路板设置镂空区域,以露出电路板底部的补强板,其次,芯片再设置于镂空区域内,并通过DA(Die Attach)胶粘接于芯片底面与补强板之间。然而,由于DA胶的导热系数较低,芯片产生的热量因被DA胶阻隔而无法传输至补强板,进而导致芯片的散热效果差。
发明内容
本申请提供一种散热效果较佳的电路板组件、摄像模组及电子设备。
第一方面,本申请实施例提供一种电路板组件。电路板组件包括补强板、胶材、芯片、第一注塑件以及电路板。其中,所述芯片可以为感光芯片或者指纹芯片等。下文所述芯片以感光芯片为例进行描述。
其中,所述胶材固定于所述补强板的表面。所述感光芯片固定于所述胶材远离所述补强板的表面。所述补强板、所述胶材以及所述感光芯片围出一空间。所述第一注塑件位于所述空间内,且所述第一注塑件连接于所述感光芯片与所述补强板之间。所述第一注塑件的导热系数大于所述胶材的导热系数。导热系数是指在稳定传热条件下,1米厚的材料,两侧表面的温差为1度(K,℃),在一定时间内,通过1平方米面积传递的热量,单位为瓦/(米ⅹ度),也即(W/(mⅹK)。
另外,所述电路板固定于所述补强板。所述电路板与所述感光芯片位于所述补强板的同一侧。所述电路板环绕所述感光芯片设置。所述感光芯片电连接于所述电路板。
可以理解的是,通过在感光芯片与补强板之间形成一空间,从而将第一注塑件设置于该空间内。这样,第一注塑件与感光芯片的连接面积较大。感光芯片与第一注塑件的连接牢固度更佳。另外,当第一注塑件的导热系数大于胶材的导热系数时,感光芯片产生的热量能够经第一注塑件快速地传输至补强板,并经补强板导出,也即感光芯片产生的热量不会因胶材的导热系数低而很难传输至补强板。此时,一方面感光芯片与第一注塑件的接触面积较大,感光芯片的散热效果较佳。当电路板组件应用于摄像模组时,摄像模组的热噪声较低以及摄像模组的后焦不容易发生变异。另一方面,热量传输至电路板组件的外部的路径较短,感光芯片的散热效率较高。
另外,感光芯片朝向补强板的少部分表面通过胶材固定于补强板。此时,胶材不容易影响感光芯片的平整度,从而当电路板组件应用于摄像模组时,可以避免摄像模组拍摄的图像出现不清晰或者存在畸变等问题。
一种实施方式中,所述第一注塑件的导热系数大于或等于2W/(mⅹK)。
可以理解的是,相较于胶材的导热系数0.3-0.5W/(mⅹK),第一注塑件的导热系数远远大于胶材的导热系数。此时,感光芯片产生的热量能够以较快的速度导出,感光芯片的散 热效果较佳。
一种实施方式中,所述第一注塑件的材质包括环氧树脂模塑料。环氧树脂模塑料包括环氧树脂、酚醛树脂以及氧化铝微小粉。
一种实施方式中,所述补强板包括底板以及凸台。所述凸台连接于所述底板的表面。所述电路板固定于所述底板,且环绕所述凸台设置。所述胶材固定于所述凸台远离所述底板的表面。部分所述底板、所述凸台、所述胶材以及所述感光芯片围出所述空间。
可以理解的是,通过设置一种具有凸台的补强板,并利用凸台将感光芯片垫高,从而在感光芯片与补强板之间形成新的空间。此时,再将第一注塑件设置于感光芯片与补强板之间的空间内。此时,通过调整凸台的高度可以灵活地调节空间的大小。设置于感光芯片与补强板之间的第一注塑件的高度也可以灵活控制。这样,一方面,第一注塑件不容易因空间较小而无法注塑形成,另一方面,第一注塑件不会因高度较高而显著增大电路板组件的厚度。
一种实施方式中,所述凸台的数量为多个。多个所述凸台间隔且围成环状结构。这样,当感光芯片固定于多个凸台上时,感光芯片不容易发生倾斜,感光芯片的稳定性较佳。
另外,部分所述第一注塑件位于所述多个凸台所围的区域内。部分所述第一注塑件位于相邻两个所述凸台之间的流道内。此时,所述第一注塑件能够将感光芯片、多个凸台以及底板封装为一体。电路板组件的整体性较佳。
一种实施方式中,所述补强板包括凸块。所述凸块固定于所述底板朝向所述感光芯片的表面。所述凸块与所述凸台位于所述底板的同一侧。所述凸块正对于所述感光芯片。所述第一注塑件包覆所述凸块。此时,补强板与第一注塑件的接触面积更大。这样,感光芯片产生的热量能够快速地经第一注塑件传输至补强板,并经补强板传输至电路板组件的外部。电路板组件的散热效果较佳。
一种实施方式中,所述底板设置有第二通孔。所述第二通孔贯穿所述底板朝向所述感光芯片的表面与所述底板远离所述感光芯片的表面。所述第二通孔正对于所述感光芯片。部分所述第一注塑件设置于所述第二通孔内。此时,感光芯片所产生的部分热量能够直接经第一注塑件传输至电路板组件的外部,感光芯片的散热效果更佳。
一种实施方式中,底板设置有凹槽。凹槽的开口位于底板朝向感光芯片的表面。凹槽正对于感光芯片。此外,第一注塑件设置于凹槽内。这样,补强板与第一注塑件的接触面积更大。感光芯片产生的热量能够以较快的速度能够快速地经第一注塑件传输至补强板,并经补强板传输至电路板组件的外部。这样,电路板组件的散热效果较佳。
一种实施方式中,所述凸台的数量为一个。部分所述第一注塑件环绕所述凸台设置。
可以理解的是,通过在底板固定连接一个凸台,并利用凸台将感光芯片垫高,从而在感光芯片与底板之间形成新的空间。此时,再将第一注塑件环绕凸台设置,且连接于凸台。这样,第一注塑件与感光芯片的连接面积较大。感光芯片与第一注塑件的连接牢固度更佳。另外,通过设置第一注塑件的导热系数大于胶材的导热系数,从而使得感光芯片产生的热量能够经第一注塑件快速地传输至补强板,并经补强板导出,也即感光芯片产生的热量不会因胶材的导热系数低而很难传输至补强板。此时,感光芯片的散热效果较佳。
一种实施方式中,所述电路板组件还包括电子元器件以及第二注塑件。所述电子元器件固定于所述电路板远离所述底板的表面,且电连接于所述电路板。电子元器件可以为电容、电感、电阻或者驱动芯片等。电子元器件用于辅助感光芯片对所采集的环境光线进行信号处理。
另外,所述第二注塑件固定于所述电路板与所述补强板,且包覆所述电子元器件。此时, 所述第二注塑件用于将电子元器件封装于电路板。电路板组件的整体性更佳。所述第二注塑件与所述第一注塑件为一体成型结构。此时,所述第二注塑件与所述第一注塑件的成型步骤较少,可以减少成本的投入。
一种实施方式中,所述电路板组件还包括金线。所述金线一端电连接于所述感光芯片,另一端电连接于所述电路板。所述第二注塑件包覆所述金线。此时,第二注塑件可以保护所述金线,避免所述金线受损伤。另外,所述电路板组件的整体性更佳。
一种实施方式中,所述感光芯片远离所述胶材的表面包括感应区及非感应区。所述非感应区连接于所述感应区的周缘。可以理解的是,当所述感光芯片为感应芯片时,所述感应区为感光区,所述非感应区为非感光区。所述金线的一端电连接于所述非感应区。
所述第二注塑件覆盖所述非感光区。此时,感光芯片产生的热量也能够经所述第二注塑件传输至电路板组件的外部。这样,感光芯片与所述第二注塑件的接触面积进一步地增大。感光芯片的散热效果更佳。
一种实施方式中,所述胶材为DA胶。所述补强板包括底板以及凸台。所述凸台连接于所述底板的表面。所述电路板固定于所述底板,且环绕所述凸台设置。所述胶材固定于所述凸台远离所述底板的表面。部分所述底板、所述凸台、所述胶材以及所述感光芯片围出所述空间。
所述凸台的数量为多个。多个所述凸台间隔且围成环状结构。部分所述第一注塑件位于所述多个凸台所围的区域内。部分所述第一注塑件位于相邻两个所述凸台之间的流道内。
所述电路板组件还包括电子元器件以及第二注塑件。所述电子元器件固定于所述电路板远离所述底板的表面,且电连接于所述电路板。所述第二注塑件固定于所述电路板与所述补强板,且包覆所述电子元器件。所述第二注塑件与所述第一注塑件为一体成型结构。
所述第一注塑件与所述第二注塑件的材质包括环氧树脂、酚醛树脂以及氧化铝微小粉。
所述电路板组件还包括金线。所述金线一端电连接于所述感光芯片,另一端电连接于所述电路板。所述第二注塑件包覆所述金线。
所述感光芯片远离所述胶材的表面包括感光区及非感光区。所述非感光区连接于所述感光区的周缘。所述金线的一端电连接于所述非感光区。所述第二注塑件覆盖所述非感光区。
第二方面,本申请实施例提供一种电路板组件。电路板组件包括补强板、电路板、胶材、芯片、电子元器件以及注塑件。其中,所述芯片可以为感光芯片或者指纹芯片等。下文所述芯片以感光芯片为例进行描述。电子元器件可以为电容、电感、电阻或者驱动芯片等。电子元器件用于辅助感光芯片对所采集的环境光线进行信号处理。
所述补强板包括底板以及凸台。所述凸台连接于所述底板的表面。所述电路板固定于所述底板,且环绕所述凸台设置。所述胶材固定于所述凸台远离所述底板的表面。所述芯片固定于所述胶材远离所述凸台的表面,且电连接于所述电路板。所述电子元器件固定于所述电路板远离所述底板的表面,且电连接于所述电路板。所述注塑件包括第一部分(也称为第二注塑件)以及连接所述第一部分的第二部分(也称为第一注塑件)。所述注塑件为一体成型结构。所述第一部分固定于所述电路板与所述补强板,且包覆所述电子元器件。所述第二部分固定于所述芯片与所述补强板之间。所述注塑件的导热系数大于所述胶材的导热系数。
可以理解的是,通过设置一种具有凸台的补强板,并利用凸台将感光芯片垫高,从而在感光芯片与补强板之间形成新的空间。此时,再将注塑件的第二部分设置于感光芯片与补强板之间的空间内。此时,感光芯片的大部分外表面均被注塑件包覆,也即注塑件与感光芯片的接触面积较大。感光芯片与注塑件的连接牢固度更佳。
另外,通过设置注塑件的导热系数大于胶材的导热系数,从而使得感光芯片产生的热量能够经注塑件快速地传输至补强板,并经补强板导出摄像模组,也即感光芯片产生的热量不会因胶材的导热系数低而很难传输至补强板。此时,一方面感光芯片与注塑件的接触面积较大,感光芯片的散热效果较佳。当电路板组件应用于摄像模组时,摄像模组的热噪声较低以及摄像模组的后焦不容易发生变异。另一方面,热量传输至摄像模组的外部的路径较短,感光芯片的散热效率较高。
另外,感光芯片朝向补强板的少部分表面通过胶材固定于补强板。此时,胶材不容易影响感光芯片的平整度,从而当电路板组件应用于摄像模组时,避免摄像模组拍摄的图像出现不清晰或者存在畸变等问题。
另外,注塑件还能够用于将电路板、补强板、感光芯片以及电子元器件封装为一体,从而保证电路板组件的结构强度更佳。本实施方式的注塑件具有“一物多用”的效果。
一种实施方式中,所述注塑件的导热系数大于或等于2W/(mⅹK)。
可以理解的是,相较于胶材的导热系数0.3-0.5W/(mⅹK),注塑件的导热系数远远大于胶材的导热系数。此时,感光芯片产生的热量能够以较快的速度导出,感光芯片的散热效果较佳。
一种实施方式中,所述注塑件的材质包括环氧树脂模塑料。环氧树脂模塑料包括环氧树脂、酚醛树脂以及氧化铝微小粉。
一种实施方式中,所述凸台的数量为多个。多个所述凸台间隔且围成环状结构。这样,当感光芯片固定于多个凸台上时,感光芯片不容易发生倾斜,感光芯片的稳定性较佳。
所述第二部分位于所述多个凸台所围的区域内以及相邻两个所述凸台之间的流道内。此时,所述注塑件能够将感光芯片、多个凸台以及底板封装为一体。电路板组件的整体性较佳。
一种实施方式中,所述补强板包括凸块。所述凸块固定于所述底板朝向所述芯片的表面。所述凸块与所述凸台位于所述底板的同一侧。所述凸块正对于所述感光芯片。所述第二部分包覆所述凸块。此时,补强板与第二部分的接触面积更大。这样,感光芯片产生的热量能够快速地经第二部分传输至补强板,并经补强板传输至电路板组件的外部。电路板组件的散热效果较佳。
一种实施方式中,所述底板设置有第二通孔。所述第二通孔贯穿所述底板朝向所述芯片的表面与所述底板远离所述芯片的表面。所述第二通孔正对于所述感光芯片。部分所述第二部分设置于所述第二通孔内。此时,感光芯片所产生的部分热量能够直接经第二部分传输至电路板组件的外部,感光芯片的散热效果更佳。
一种实施方式中,底板设置有凹槽。凹槽的开口位于底板朝向感光芯片的表面。凹槽正对于感光芯片。此外,第二部分设置于凹槽内。这样,补强板与第二部分的接触面积更大。感光芯片产生的热量能够以较快的速度能够快速地经第二部分传输至补强板,并经补强板传输至电路板组件的外部。这样,电路板组件的散热效果较佳。
一种实施方式中,所述凸台的数量为一个。所述第二部分环绕所述凸台设置。
可以理解的是,通过在底板固定连接一个凸台,并利用凸台将感光芯片垫高,从而在感光芯片与底板之间形成新的空间。此时,再将第二部分环绕凸台设置,且连接于凸台。这样,第二部分与感光芯片的连接面积较大。感光芯片与第二部分的连接牢固度更佳。另外,通过设置注塑件的导热系数大于胶材的导热系数,从而使得感光芯片产生的热量能够经注塑件快速地传输至补强板,并经补强板导出,也即感光芯片产生的热量不会因胶材的导热系数低而很难传输至补强板。此时,感光芯片的散热效果较佳。
一种实施方式中,所述电路板组件还包括金线。所述金线一端电连接于所述芯片,另一端电连接于所述电路板。所述第一部分包覆所述金线。此时,第一部分可以保护所述金线,避免所述金线受损伤。另外,所述电路板组件的整体性更佳。
一种实施方式中,所述芯片远离所述胶材的表面包括感应区及非感应区。所述非感应区连接于所述感应区的周缘。所述金线的一端电连接于所述非感应区。所述第一部分覆盖所述非感应区。此时,感光芯片产生的热量也能够经所述第一部分传输至电路板组件的外部。这样,感光芯片与所述第一部分的接触面积进一步地增大。感光芯片的散热效果更佳。
第三方面,本申请实施例提供一种电路板组件。电路板组件包括补强板、电路板、胶材、芯片以及冷却液。所述补强板包括底板以及凸台。所述凸台连接于所述底板的表面。所述电路板固定于所述底板,且环绕所述凸台设置。所述胶材固定于所述凸台远离所述底板的表面。所述芯片固定于所述胶材远离所述凸台的表面,且电连接于所述电路板。所述芯片、所述胶材、所述凸台以及部分所述底板围出容纳腔。所述冷却液设置于所述容纳腔内。
可以理解的是,通过设置一种具有环状凸台的补强板,并利用凸台将感光芯片垫高,从而在感光芯片与补强板之间形成新的空间,也即容纳腔的空间。此时,在容纳腔内设置冷却液。这样,当感光芯片产生的热量时,冷却液能够吸收热量,并将吸收的热量通过补强板传输至摄像模组的外部,从而实现降低感光芯片的效果。故而,本实施方式的感光芯片的散热效果较佳。
另外,感光芯片朝向补强板的少部分表面通过胶材固定于补强板。此时,胶材不容易影响感光芯片的平整度,从而当电路板组件应用于摄像模组时,可以避免摄像模组拍摄的图像出现不清晰或者存在畸变等问题。
一种实施方式中,所述冷却液为水、甘油型、乙二醇溶液或者钠钾合金。
一种实施方式中,所述补强板包括凸块。所述凸块固定于所述底板朝向所述芯片的表面,所述凸块位于所述容纳腔内。此时,补强板与冷却液的接触面积更大。这样,感光芯片产生的热量能够快速地经冷却液传输至补强板,并经补强板传输至电路板组件的外部。电路板组件的散热效果较佳。
一种实施方式中,底板设置有凹槽。凹槽的开口位于底板朝向感光芯片的表面。凹槽位于所述容纳腔内。此外,冷却液设置于凹槽内。此时,本实施方式的冷却液的体积更大。这样,冷却液能够吸收感光芯片产生的热量更多。感光芯片的散热效果更佳。
一种实施方式中,所述底板包括第一板件以及第二板件。所述第二板件层叠于所述第一板件,且所述第二板件固定连接于所述第一板件。所述凸台固定于所述第二板件远离所述第一板件的表面。所述第二板件、所述胶材、所述凸台以及所述感光芯片围成容纳腔。所述第二板件设置有第二通孔。所述第二通孔贯穿所述第二板件朝向所述芯片的表面以及所述第二板件远离所述芯片的表面。所述第二通孔连通所述容纳腔。部分所述冷却液设置于所述第二通孔内。此时,本实施方式的冷却液的体积更大。这样,冷却液能够吸收感光芯片产生的热量更多。感光芯片的散热效果更佳。
一种实施方式中,所述补强板包括凸块,所述凸块固定于所述第一板件朝向所述芯片的表面,所述凸块的部分或者全部位于所述第二通孔内。此时,补强板与冷却液的接触面积更大。这样,感光芯片产生的热量能够快速地经冷却液传输至补强板,并经补强板传输至电路板组件的外部。电路板组件的散热效果较佳。
一种实施方式中,所述电路板组件还包括电子元器件以及注塑件。所述电子元器件固定于所述电路板的顶面,且电连接于所述电路板。电子元器件可以为电容、电感、电阻或者驱 动芯片等。电子元器件用于辅助感光芯片对所采集的环境光线进行信号处理。
所述注塑件固定于所述电路板与所述补强板,且包覆所述电子元器件。此时,所述注塑件用于将电子元器件封装于电路板。电路板组件的整体性更佳。所述注塑件的导热系数大于所述胶材的导热系数。
一种实施方式中,所述电路板组件还包括金线。所述金线一端电连接于所述芯片,另一端电连接于所述电路板。所述注塑件包覆所述金线。此时,注塑件可以保护所述金线,避免所述金线受损伤。另外,所述电路板组件的整体性更佳。
一种实施方式中,所述芯片远离所述胶材的表面包括感应区及非感应区。所述非感应区连接于所述感应区的周缘。可以理解的是,当所述芯片为感应芯片时,所述感应区为感光区,所述非感应区为非感光区。所述金线的一端电连接于所述非感应区。
所述金线的一端电连接于所述非感应区。所述注塑件覆盖所述非感应区。此时,感光芯片产生的热量也能够经所述注塑件传输至电路板组件的外部。这样,感光芯片与所述注塑件的接触面积进一步地增大。感光芯片的散热效果更佳。
第四方面,本申请实施例提供一种摄像模组。摄像模组包括光学镜头以及如上所述电路板组件。所述光学镜头固定于所述电路板组件的一侧。所述光学镜头的出光侧正对于所述芯片。所述芯片用于采集穿过所述光学镜头的环境光线。
可以理解的是,当电路板组件应用于摄像模组时,摄像模组的散热效果较佳,摄像模组的热噪声较低以及摄像模组的后焦不容易发生变异。
另外,感光芯片的平整度不容易受胶材影响。当电路板组件应用于摄像模组时,避免摄像模组拍摄的图像出现不清晰或者存在畸变等问题。
一种实施方式中,所述摄像模组还包括支架与滤光片。所述支架连接于所述光学镜头与所述电路板组件之间。所述滤光片固定于所述支架。所述滤光片用于过滤穿过所述光学镜头的环境光线的杂光。此时,摄像模组拍摄的图像具有较佳的清晰度。
第五方面,本申请实施例提供一种电子设备。电子设备包括壳体及如上所述的摄像模组,所述摄像模组安装于所述壳体。这样,电子设备也具有较佳的散热效果。
附图说明
为了说明本申请实施例的技术方案,下面将对本申请实施例中所需要使用的附图进行说明。
图1是本申请实施例提供的电子设备的结构示意图;
图2是图1所示的电子设备的部分分解示意图;
图3是图1所示的电子设备在A-A线处的部分剖面示意图;
图4是图2所示的摄像模组的部分分解示意图;
图5a是传统的电路板组件的结构示意图;
图5b是图5a所示的电路板组件在B-B线的剖面图;
图6是图4所示的摄像模组的电路板组件的部分分解示意图;
图7是图4所示的摄像模组的电路板组件在C-C线的一种实施方式的剖面示意图;
图8是图4所示的摄像模组的电路板组件的部分结构示意图;
图9是图4所示的摄像模组的电路板组件的部分结构示意图;
图10是图4所示的摄像模组的电路板组件的部分结构示意图;
图11是图6所示的补强板的另一种实施方式的结构示意图;
图12是图4的摄像模组的电路板组件在C-C线处的另一种实施方式的剖面示意图;
图13是图6所示的补强板的再一种实施方式的结构示意图;
图14是图4所示的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图15a是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图15b是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图15c是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图15d是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图15e是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图16是图6所示的补强板的再一种实施方式的结构示意图;
图17是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图18是图6所示的补强板的再一种实施方式的结构示意图;
图19是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图20是图6所示的补强板的再一种实施方式的结构示意图;
图21是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图;
图22是图4的摄像模组的电路板组件在C-C线处的再一种实施方式的剖面示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
请参阅图1,图1是本申请实施例提供的电子设备100的结构示意图。电子设备100可以为手机、平板电脑(tablet personal computer)、膝上型电脑(laptop computer)、个人数码助理(personal digital assistant,PDA)、照相机、个人计算机、笔记本电脑、车载设备、可穿戴设备、增强现实(augmented reality,AR)眼镜、AR头盔、虚拟现实(virtual reality,VR)眼镜或者VR头盔等具有摄像模组的设备。图1所示实施例的电子设备100以手机为例进行阐述。
请参阅图2,并结合图1所示,图2是图1所示的电子设备100的部分分解示意图。电子设备100包括壳体10、屏幕20、主机电路板30以及摄像模组40。需要说明的是,图1、图2以及下文相关附图仅示意性的示出了电子设备100包括的一些部件,这些部件的实际形状、实际大小、实际位置和实际构造不受图1、图2以及下文各附图限定。此外,当电子设备100为一些其他形态的设备时,电子设备100也可以不包括屏幕20以及主机电路板30。
为了便于描述,定义电子设备100的宽度方向为X轴。电子设备100的长度方向为Y轴。电子设备100的厚度方向为Z轴。可以理解的是,电子设备100的坐标系设置可以根据具体实际需要灵活设置。
其中,壳体10包括边框11以及后盖12。后盖12固定于边框11的一侧。一种实施方式中,后盖12通过粘胶固定连接于边框11。在另一种实施方式中,后盖12与边框11为一体成型结构,即后盖12与边框11为一个整体结构。
在其他实施例中,壳体10也可以包括中板(图未示)。中板连接于边框11的内表面。中板与后盖12相对且间隔设置。
请再次参阅图2,屏幕20固定于边框11的另一侧。此时,屏幕20与后盖12相对设置。屏幕20、边框11与后盖12共同围出电子设备100的内部。电子设备100的内部可用于放置电子设备100的器件,例如电池、受话器或者麦克风等。
在本实施例中,屏幕20可用于显示图像。屏幕20可以为平面屏,也可以为曲面屏。屏 幕20包括第一盖板21和显示屏22。第一盖板21层叠于显示屏22。第一盖板21可以紧贴显示屏22设置,可主要用于对显示屏22起到保护以及防尘作用。第一盖板21的材质可以为但不仅限于为玻璃。显示屏22可以采用有机发光二极管(organic light-emitting diode,OLED)显示屏,有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light-emitting diode,AMOLED)显示屏,量子点发光二极管(quantum dot light emitting diodes,QLED)显示屏等。
请参阅图3,并结合图2所示,图3是图1所示的电子设备100在A-A线处的部分剖面示意图。主机电路板30固定于电子设备100的内部。具体的,主机电路板30可以固定于屏幕20朝向后盖12的一侧。在其他实施例中,当壳体10包括中板时,主机电路板30可以固定于中板朝向后盖12的表面。
可以理解的是,主机电路板30可以为硬质电路板,也可以为柔性电路板,也可以为软硬结合电路板。主机电路板30可以采用FR-4介质板,也可以采用罗杰斯(Rogers)介质板,也可以采用FR-4和Rogers的混合介质板,等等。这里,FR-4是一种耐燃材料等级的代号,Rogers介质板为一种高频板。另外,主机电路板30可以用于设置芯片。例如,芯片可以为中央处理器(central processing unit,CPU)、图形处理器(graphics processing unit,GPU)以及通用存储器(universal flash storage,UFS)等。
请再次参阅图3,并结合图2所示,摄像模组40固定于电子设备100的内部。具体的,摄像模组40固定于屏幕20朝向后盖12的一侧。在其他实施例中,当壳体10包括中板时,摄像模组40可以固定于中板朝向后盖12的表面。
另外,主机电路板30设置有避让空间31。避让空间31的形状不仅限于图1与图2所示意的矩形状。此时,主机电路板30的形状也不限于图1与图2所示意的“┘”型。摄像模组40位于避让空间31内。这样,在Z轴方向上,摄像模组40与主机电路板30具有重叠区域,从而避免摄像模组40因堆叠于主机电路板30而导致电子设备100的厚度增大。在其他实施例中,主机电路板30也可以未设置避让空间31。此时,摄像模组40可以堆叠于主机电路板30,或者与主机电路板30间隔设置。
在本实施例中,摄像模组40电连接于主机电路板30。具体的,摄像模组40通过主机电路板30电连接于CPU。当CPU接收到用户的指令时,CPU能够通过主机电路板30向摄像模组40发送信号,以控制摄像模组40拍摄图像或者录像。在其他实施例中,当电子设备100未设置主机电路板30时,摄像模组40也可以直接接收用户的指令,并根据用户的指令进行拍摄图像或者录像。
请再次参阅图3,后盖12开设有通孔13。通孔13将电子设备100的内部连通至电子设备100的外部。电子设备100还包括摄像头装饰件51和第二盖板52。部分摄像头装饰件51可以固定于后盖12的内表面,部分摄像头装饰件51接触于通孔13的孔壁。第二盖板52固定连接在摄像头装饰件51的内表面。摄像头装饰件51与第二盖板52将电子设备100的内部与电子设备100的外部隔开,从而避免外界的水或者灰尘经通孔13进入电子设备100的内部。第二盖板52的材质为透明材料。例如,玻璃或者塑料。此时,电子设备100外部的环境光线能够穿过第二盖板52进入电子设备100的内部。摄像模组40采集进入电子设备100内部的环境光线。
可以理解的是,通孔13的形状不仅限于附图1及附图2所示意的圆形。例如,通孔13的形状也可以为椭圆形或者其他不规则图形等。
在其他实施例中,摄像模组40也可以采集穿过后盖12的环境光线。具体的,后盖12的 材质为透明材料。例如,玻璃或者塑料。后盖12朝向电子设备100内部的表面部分涂覆油墨,部分未涂覆油墨。此时,未涂覆油墨的区域形成透光区域。当环境光线经该透光区域进入电子设备100的内部时,摄像模组40采集环境光线。可以理解的是,本实施例的电子设备100可以不用开设通孔13,也可以不用设置摄像头装饰件51和第二盖板52。电子设备100的整体性较佳,成本较低。
请参阅图4,图4是图2所示的摄像模组40的部分分解示意图。摄像模组40包括光学镜头41、支架42、滤光片43以及电路板组件44。
其中,光学镜头41可以为定焦镜头,也可以为变焦镜头。当光学镜头41为变焦镜头时,光学镜头41可以以音圈马达为驱动机构的镜头,也可以以记忆合金为驱动机构的镜头。光学镜头41的具体结构本实施例不做限制。结合图3所示,光学镜头41的入光侧与第二盖板52正对设置。此时,当环境光线穿过第二盖板52时,光学镜头41采集环境光线。在本实施方式中,光学镜头41能够采集沿Z轴方向传播的环境光线。在其他实施例中,光学镜头41也可以为潜望式镜头。潜望式镜头的光轴方向可以为XY平面上的任一方向。潜望式镜头包括反射件。反射件能够将沿Z轴方向传播的环境光线反射至沿X-Y平面传播的环境光线。
请再次参阅图3,支架42固定于光学镜头41的出光侧。支架42可以通过胶水或者胶带与光学镜头41相互固定。另外,支架42开设有透光孔421。透光孔421贯穿支架42朝向光学镜头41的表面以及支架42远离光学镜头41的表面。透光孔421不仅限于图4所示意的圆柱孔。
另外,滤光片43固定于支架42,且滤光片43位于透光孔421内。滤光片43可以通过胶水或者胶带固定于透光孔421的孔壁。滤光片43用于过滤穿过光学镜头41的环境光线的杂光,从而保证摄像模组40拍摄的图像具有较佳的清晰度。滤光片43可以为但不仅限于为蓝色玻璃滤光片。例如,滤光片43还可以为反射式红外滤光片,或者是双通滤光片(双通滤光片可使环境光线中的可见光和红外光同时透过,或者使环境光线中的可见光和其他特定波长的光线(例如紫外光)同时透过,或者使红外光和其他特定波长的光线(例如紫外光)同时透过。)。
另外,电路板组件44固定于支架42远离光学镜头41的一侧。此时,电路板组件44位于光学镜头41的出光侧,支架42位于电路板组件44与光学镜头41之间。另外,电路板组件44远离支架42的一侧固定于屏幕20。在其他实施例中,当壳体10包括中板时,电路板组件44远离支架42的一侧可以固定于中板朝向后盖12的表面。
上文结合附图具体介绍了本实施例的电子设备100以及摄像模组40的结构。下文将结合相关附图具体介绍一种传统的电路板组件200的结构。
请参阅图5a和图5b,图5a是传统的电路板组件200的结构示意图。图5b是图5a所示的电路板组件200在B-B线处的剖面图。电路板组件200包括电路板201、补强板202、DA胶203、感光芯片204以及电子元器件207。
其中,电路板201设有第一通孔205。第一通孔205贯穿电路板201的底面2011与电路板201的顶面2012。感光芯片204设置于第一通孔205内。此外,感光芯片204通过DA胶203固定于补强板202上。感光芯片204通过金线206电连接于电路板201。电子元器件207固定于电路板201,且电连接于电路板201。电子元器件207可以为电容、电感、电阻或者驱动芯片等。电子元器件207用于辅助感光芯片204对所采集的环境光线进行信号处理。
可以理解的是,传统的电路板组件200具有如下缺陷:
1、由于DA胶203的导热系数较低(DA胶203的导热系数大致为0.3-0.5W/(mⅹK)), 感光芯片204产生的热量容易被DA胶203阻隔,从而导致热量很难传输至补强板202,进而导致感光芯片204的散热效果差。这样,当电路板组件200应用于摄像模组时,过高的温度会导致摄像模组的热噪声严重以及光学镜头的后焦变异。可以理解的是,导热系数是指在稳定传热条件下,1米厚的材料,两侧表面的温差为1度(K,℃),在一定时间内,通过1平方米面积传递的热量,单位为瓦/(米ⅹ度),也即(W/(mⅹK)。
2、当感光芯片204的散热效果差时,感光芯片204产生的热量能够软化DA胶203,从而导致感光芯片204容易与补强板202分离,电路板组件200的可靠性变差。
3、感光芯片204朝向补强板202的大部分表面通过DA胶203固定于补强板202。此时,DA胶203容易影响感光芯片204的平整度,从而导致摄像模组拍摄的图像不清晰或者存在畸变问题。
4、感光芯片204与补强板202的连接面积较小,感光芯片204与补强板202的连接牢固度较差。
在本申请中,通过设置几种电路板组件结构,一方面提升感光芯片的散热效率,保证电路板组件具有较佳的散热效果,另一方面提高感光芯片的平整度,以及感光芯片与补强板之间的连接牢固度,增加感光芯片与补强板之间的连接可靠性。下文将结合相关附图具体介绍电路板组件的几种设置方式。
第一种实施方式:请参阅图6,图6是图4所示的摄像模组40的电路板组件44的部分分解示意图。电路板组件44包括电路板441、补强板442、胶材443、感光芯片444、注塑件445以及电子元器件446。
其中,电路板441可以为硬质电路板,也可以为柔性电路板,也可以为软硬结合电路板。此外,电路板441可以采用FR-4介质板,也可以采用罗杰斯(Rogers)介质板,也可以采用Rogers和FR-4的混合介质板,等等。
另外,电路板441包括朝向相反的底面4411以及顶面4412。电路板441设有第一通孔4413。第一通孔4413贯穿电路板441的底面4411与电路板441的顶面4412。结合图3所示,电路板441的顶面4412朝向光学镜头41。电路板441的底面4411朝向屏幕20。此外,电路板441可以电连接于主机电路板30。此时,电路板441与主机电路板30之间能够相互传输信号。
请再次参阅图6,补强板442可以为钢片、铜片、陶瓷片、铜合金片等硬度较大的材料。补强板442包括底板4421以及凸台4422。凸台4422连接于底板4421的一表面。一种实施方式中,凸台4422可以与底板4421为一体成型结构,也即凸台4422与底板4421为一个整体。在其他实施方式中,凸台4422也可以通过粘接、焊接或者螺纹连接等方式固定于底板4421。
在本实施方式中,凸台4422的数量为多个。凸台4422的数量不仅限于图6所示意的四个。多个凸台4422间隔且围成环状结构。每两个凸台4422之间的空间形成流道4420。应理解。每个凸台4422的形状不仅限于附图6所示意的“Г”型。例如,每个凸台4422也可以为块状或者条状。
在其他实施方式中,多个凸台4422所围成的形状不仅限于环状结构。例如,多个凸台4422所围成的形状也可以为“Г”型、“匚”型或者“П”型等。
请参阅图7及图8,图7是图4所示的摄像模组40的电路板组件44在C-C线的一种实施方式的剖面示意图。图8是图4所示的摄像模组40的电路板组件44的部分结构示意图。 底板4421固定于电路板441的底面4411。在本实施方式中,底板4421可以通过胶带或者胶水固定于电路板441的底面4411。此时,由于底板4421具有较大的硬度,底板4421能够较大程度地提高电路板441的整体强度,从而保证电路板441不容易断裂。在其他实施方式中,底板4421也可以通过焊接或者螺纹连接固定于电路板441的底面4411。
另外,凸台4422的部分或者全部位于第一通孔4413内。流道4420连通第一通孔4413。此时,电路板441环绕凸台4422设置。一种实施方式中,部分凸台4422位于第一通孔4413内,部分凸台4422位于第一通孔4413外。一种实施方式中,凸台4422的全部位于第一通孔4413内。
请参阅图9,并结合图7所示,图9是图4所示的摄像模组40的电路板组件44的部分结构示意图。胶材443固定于凸台4422远离底板4421的表面。胶材443的数量与凸台4422的数量相同。胶材443的形状可以与凸台4422的形状相同,也即每个胶材443的形状大致呈“Г”型。在本实施方式中,胶材443采用DA胶。
请参阅图10,并结合图7所示,图10是图4所示的摄像模组40的电路板组件44的部分结构示意图。感光芯片444的一表面包括感光区4441(也称为感应区)以及非感光区4442(也称为非感应区)。非感光区4442连接于感光区4441的周缘。感光区4441可用于采集环境光线。非感光区4442可用于排布走线。
另外,感光芯片444固定于胶材443远离凸台4422的表面。感光芯片444通过胶材443固定于补强板442上。感光芯片444的感光区4441背向胶材443。感光芯片444与电路板441位于补强板442的同一侧。另外,感光芯片444、胶材443、凸台4422以及部分底板4421围成一空间。可以理解的是,由于凸台4422具有较大的硬度,凸台4422能够较稳定的支撑感光芯片444。另外,感光芯片444电连接于电路板441。感光芯片444可以通过金线或者铜线等导电线电连接于电路板441。
请再次参阅图7,感光芯片444的周缘连接于多个凸台4422。此时,感光芯片444不容易发生倾斜。感光芯片444的稳定性较佳。在其他实施方式中,多个凸台4422也可以连接于感光芯片444的其他位置,例如感光芯片444的中部。
结合图3所示,感光芯片444的感光区4441正对于滤光片43,也即感光芯片444的感光区4441朝向光学镜头41。此时,当滤光片43过滤穿过光学镜头41的环境光线的杂光之后,环境光线传播至感光芯片444。感光芯片444的感光区4441采集环境光线。感光芯片444形成电信号。电信号经电路板441传输至主机电路板30。主机电路板30对电信号进行处理,并控制屏幕20显示所拍摄的图像。
请再次参阅图7,电子元器件446固定于电路板441的顶面4412,且电连接于电路板441。电子元器件446可以为电容、电感、电阻或者驱动芯片等。电子元器件446用于辅助感光芯片444对所采集的环境光线进行信号处理。
另外,注塑件445为一体成型结构件。注塑件445包括第一部分4451(也称为第二注塑件)以及连接第一部分4451的第二部分4452(也称为第一注塑件)。第一部分4451用于将电子元器件446封装于电路板441。第一部分4451固定于电路板441的顶面4412,且包覆电子元器件446。应理解,第一部分4451可以完全包覆电子元器件446,也可以部分包覆电子元器件446,也即部分电子元器件446相对第一部分4451露出。此外,第一部分4451还设置于第一通孔4413内,且第一部分4451覆盖感光芯片444的非感光区4442,以及包覆电连接于感光芯片444与电路板441之间的导电线。感光芯片444的感光区4441相对第一部分4451露出。
另外,注塑件445的第二部分4452位于感光芯片444朝向补强板442的一侧。第二部分4452连接于感光芯片444与补强板442之间。在本实施方式中,第二部分4452位于多个凸台4422所围的区域内,以及相邻两个凸台4422之间的流道4420内。这样,注塑件445能够将电路板441、补强板442、感光芯片444以及电子元器件446封装为一体。电路板组件44的整体性较佳。电路板441、补强板442、感光芯片444以及电子元器件446之间的连接牢固度较佳。
其中,注塑件445可以通过芯片塑封工艺(molding on chip,MOC)形成。具体的,将固定完成的电路板441、补强板442、感光芯片444以及电子元器件446放置于模腔内。此时,再将封装材料挤压入模腔,以使部分封装材料位于电路板441的顶面4412,且包覆电子元器件446。部分封装材料流入第一通孔4413内,并覆盖感光芯片444的非感光区4442以及包覆电连接于感光芯片444与电路板441之间的导电线。另外,部分封装材料经第一通孔4413、每两个凸台4422之间的流道4420流入感光芯片444、胶材443、凸台4422与部分底板4421所围的空间内。当封装材料交联固化成型之后,封装材料形成一体成型结构的注塑件445。
在本实施方式中,注塑件445的材质为环氧树脂模塑料(epoxy molding compound,EMC)。环氧树脂模塑料也称为环氧塑封料。可以理解的是,EMC是由环氧树脂为基体树脂,以高性能酚醛树脂为固化剂,加入氧化铝微小粉等填料,以及添加多种助剂混配而成的粉状模塑料。在其他实施方式中,注塑件445也可以采用其他封装材料。
结合图3所示,当注塑件445覆盖电路板441的顶面4412时,支架42可以固定于注塑件445。当注塑件445未完全覆盖电路板441的顶面4412时,支架42也可以固定于电路板441。
请再次参阅图7,注塑件445的导热系数大于胶材443的导热系数。这样,当注塑件445的导热系数大于胶材443的导热系数时,注塑件445的传热效率相较于胶材443的传热效率高。感光芯片444产生的热量能够经注塑件445快速地传输至补强板442,并经补强板443传输出摄像模组40的外部,从而有效地解决感光芯片444的热量因胶材443的导热系数低而未能及时导出的问题。
上文结合相关附图具体介绍了一种电路板组件44。可以理解的是,本实施方式通过设置一种具有凸台4422的补强板442,并利用凸台4422将感光芯片444垫高,从而在感光芯片444与补强板442之间形成新的空间。此时,再将注塑件445的第二部分4452设置于感光芯片444与补强板442之间的空间内。此时,感光芯片444的大部分外表面均被注塑件445包覆,也即注塑件445与感光芯片444的接触面积较大。感光芯片444与注塑件445的连接牢固度更佳。
另外,通过设置注塑件445的导热系数大于胶材443的导热系数,从而使得感光芯片444产生的热量能够经注塑件445快速地传输至补强板442,并经补强板442导出摄像模组40,也即感光芯片444产生的热量不会因胶材443的导热系数低而很难传输至补强板442。此时,一方面感光芯片444与注塑件445的接触面积较大,感光芯片444的散热效果较佳。摄像模组40的热噪声较低以及摄像模组40的后焦不容易发生变异。另一方面,热量传输至摄像模组40的外部的路径较短,感光芯片444的散热效率较高。
另外,通过将大部分注塑件445固定于感光芯片444的中部与底板4421之间,感光芯片444产生的大部分热量均能够经注塑件445快速地传输至补强板442,并经补强板442传输出摄像模组40的外部,从而有效解决感光芯片444的中部发热量较大的问题。此时,感光芯片444的散热效果较佳。
另外,当注塑件445的第一部分4451覆盖于感光芯片444的非感光区4442时,感光芯片444产生的热量也能够经第一部分4451传输至摄像模组40的外部。这样,感光芯片444与注塑件445的接触面积进一步地增大。感光芯片444的散热效果更佳。
另外,感光芯片444朝向补强板442的少部分表面通过胶材443固定于补强板442。此时,胶材443不容易影响感光芯片444的平整度,从而避免摄像模组40拍摄的图像出现不清晰或者存在畸变等问题。
另外,注塑件445还能够用于将电路板441、补强板442、感光芯片444以及电子元器件446封装为一体,从而保证电路板组件44的结构强度更佳。本实施方式的注塑件445具有“一物多用”的效果。
一种实施方式中,注塑件445的导热系数大于或等于2W/(mⅹK)。相较于胶材443的导热系数0.3-0.5W/(mⅹK),注塑件445的导热系数远远大于胶材443的导热系数。此时,感光芯片444产生的热量能够以较快的速度导出,感光芯片444的散热效果较佳。
第二种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图11,图11是图6所示的补强板442的另一种实施方式的结构示意图。补强板442包括凸块4423。凸块4423与凸台4422位于底板4421的同一侧。凸块4423的形状不仅限于图11所示意的长方体。例如,凸块4423的形状也可以为三棱柱、圆柱或者球体。在本实施方式中,凸块4423位于多个凸台4422所围的区域内。在其他实施方式中,凸块4423也可以设置于多个凸台4422所围的区域外。例如,凸块4423可以位于两个凸台4422之间的流道4420内。
另外,凸块4423固定于底板4421。在本实施方式中,凸块4423与底板4421为一体成型结构。在其他实施方式中,凸块4423也可以通过粘接、焊接或者螺纹连接等方式固定于底板4421。
在本实施方式中,凸块4423的数量为多个。多个凸块4423呈阵列排布。
在其他实施方式中,多个凸块4423也可以呈无规则排布。
在其他实施方式中,凸块4423也可以为一个。
请参阅图12,图12是图4的摄像模组40的电路板组件44在C-C线处的另一种实施方式的剖面示意图。图12通过虚线示意性的区分凸块4423与底板4421。凸块4423正对于感光芯片444。注塑件445的第二部分4452包覆凸块4423。此时,相较于第一种实施方式的补强板442,本实施方式的补强板442与注塑件445的接触面积更大。这样,感光芯片444产生的热量能够快速地经注塑件445传输至补强板442,并经补强板442传输至摄像模组40的外部。电路板组件44的散热效果较佳。
第三种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图13及图14,图13是图6所示的补强板442的再一种实施方式的结构示意图。图14是图4所示的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。底板4421设置有第二通孔4424。第二通孔4424自底板4421朝向感光芯片444的表面贯穿至底板4421远离感光芯片444的表面。第二通孔4424正对于感光芯片444,且第二通孔4424位于多个凸台4422所围的区域内。
此外,注塑件445的第二部分4452设置于第二通孔4424内。此时,感光芯片444所产生的部分热量能够直接经注塑件445传输至摄像模组40的外部,感光芯片444的散热效果更佳。
在本实施方式中,第二通孔4424的数量为多个。多个第二通孔4424呈阵列排布。
在其他实施方式中,多个第二通孔4424也可以呈无规则排布。
在其他实施方式中,第二通孔4424也可以为一个。第二通孔4424的大小可以占满多个凸台4422所围的区域,也可以为多个凸台4422所围区域的一部分。
在其他实施方式中,第二通孔4424也可以设置于多个凸台4422所围的区域外。
第四种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图15a,图15a是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。底板4421设置有凹槽4425。凹槽4425的开口位于底板4421朝向感光芯片444的表面。凹槽4425正对于感光芯片444,且凹槽4425位于多个凸台4422所围的区域内。此外,凹槽4425的数量为多个。多个凹槽4425呈阵列排布。
此外,注塑件445的第二部分4452设置于凹槽4425内。相较于第一种实施方式的补强板442,本实施方式的补强板442与注塑件445的接触面积更大。感光芯片444产生的热量能够以较快的速度能够快速地经注塑件445传输至补强板442,并经补强板442传输至摄像模组40的外部。这样,电路板组件44的散热效果较佳。
在其他实施方式中,多个凹槽4425也可以呈无规则排布。
在其他实施方式中,凹槽4425也可以为一个。凹槽4425的大小可以占满多个凸台4422所围的区域。
在其他实施方式中,凹槽4425也可以设置于多个凸台4422所围的区域外。
第五种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图15b,图15b是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。感光芯片444远离补强板442的表面相对注塑件445的第一部分4451露出,也即第一部分4451未覆盖感光芯片444远离补强板442的表面。此时,电路板组件44的厚度较薄,有利于电路板组件44的薄型化以及轻型化设置。
一种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图15c,图15c是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。本实施方式的注塑件445的结构为第一种实施方式的注塑件445的第二部分4452的结构,也即本实施方式的注塑件445未包括第一种实施方式的注塑件445的第一部分4451。注塑件445连接于感光芯片444与补强板442之间。此时,电路板组件44的成本投入较少,电路板组件44可以实现轻型化设置。
第六种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图15d,图15d是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。补强板442固定于电路板441的底面4411。感光芯片444设置于第一通孔4413内,且通过胶材443固定于补强板442上。此时,电路板441环绕感光芯片444设置。感光芯片444、胶材443补强板442围出一空间S。空间S与第一通孔4413连通。注塑件445的第二部分4452设置于空间S内。其中,第二部分4452位于多个胶材443所围的区域内,以及相邻两个胶材443之间的空间内。
在本实施方式中,通过将在感光芯片444与补强板442之间形成空间S,从而将注塑件445的第二部分4452设置空间S内。这样,注塑件445与感光芯片444的连接面积较大。感光芯片444与注塑件445的连接牢固度更佳。另外,当注塑件445的导热系数大于胶材443的导热系数时,感光芯片444产生的热量能够经注塑件445快速地传输至补强板442,并经补强板442导出,也即感光芯片444产生的热量不会因胶材443的导热系数低而很难传输至补强板442。此时,一方面感光芯片444与注塑件445的接触面积较大,感光芯片444的散热效果较佳。摄像模组40的热噪声较低以及摄像模组40的后焦不容易发生变异。另一方面, 热量传输至摄像模组40的外部的路径较短,感光芯片444的散热效率较高。
一种实施方式中,请参阅图15e,图15e是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。补强板442设有凹陷区447。凹陷区447连通空间S。注塑件445的第二部分4452设置于凹陷区447内。此时,相较于第一种实施方式的补强板442,本实施方式的补强板442与注塑件445的接触面积更大。这样,感光芯片444产生的热量能够快速地经注塑件445传输至补强板442,并经补强板442传输至摄像模组40的外部。电路板组件44的散热效果较佳。
第七种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图16,图16是图6所示的补强板442的再一种实施方式的结构示意图。凸台4422的数量为一个。凸台4422的形状不仅限于图16所示意的方形。例如,凸台4422的形状也可以为圆柱形。在本实施方式中,凸台4422位于底板4421的中部。在其他实施方式中,凸台4422也可以位于底板4421的其他位置。
请参阅图17,图17是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。注塑件445的第二部分4452环绕凸台4422设置,且第二部分4452连接凸台4422。图17通过虚线示意性地区分注塑件445的第一部分4451与第二部分4452。
在本实施方式中,通过在底板4421固定连接一个凸台4422,并利用凸台4422将感光芯片444垫高,从而在感光芯片444的周缘与底板4421之间形成新的空间。此时,再将注塑件445的第二部分4452环绕凸台4422设置,且连接于凸台4422。这样,注塑件445与感光芯片444的连接面积较大。感光芯片444与注塑件445的连接牢固度更佳。另外,通过设置注塑件445的导热系数大于胶材443的导热系数,从而使得感光芯片444产生的热量能够经注塑件445快速地传输至补强板442,并经补强板442导出,也即感光芯片444产生的热量不会因胶材443的导热系数低而很难传输至补强板442。此时,感光芯片444的散热效果较佳。
在其他实施方式中,第五种实施方式也可以与第二种实施方式至第五种实施方式相互结合,以构成新的实施方式。具体的这里不再赘述。
第八种实施方式,与第一种实施方式相同的技术内容不再赘述:请参阅图18及图19,图18是图6所示的补强板442的再一种实施方式的结构示意图。图19是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。电路板组件44包括电路板441、补强板442、胶材443、感光芯片444、冷却液445以及电子元器件446。
其中,补强板442包括底板4421以及凸台4422。凸台4422呈环状结构。环状结构的凸台4422的形状不仅限于附图18所示意的矩形。例如圆形、椭圆形等。另外,凸台4422与底板4421的连接关系可参阅第一种实施方式的凸台4422与底板4421的连接关系。
感光芯片444通过胶材443固定于凸台4422上。感光芯片444、胶材443、凸台4422以及部分底板4421围出容纳腔446。此时,容纳腔446大致形成一个密封的空间。
另外,冷却液445设置于容纳腔446内。冷却液445与感光芯片444、凸台4422以及底板4421接触。冷却液445可以为纯净水、甘油型、乙二醇溶液等液体。冷却液445也可以为液态金属,例如钠钾合金。
可以理解的是,本实施方式通过设置一种具有环状凸台4422的补强板442,并利用凸台4422将感光芯片444垫高,从而在感光芯片444与补强板442之间形成新的空间,也即容纳腔446的空间。此时,在容纳腔446内设置冷却液445。这样,当感光芯片444产生的热量时,冷却液445能够吸收热量,并将吸收的热量通过补强板442传输至摄像模组40的外部,从而实现降低感光芯片444的效果。故而,本实施方式的感光芯片444的散热效果较佳。
结合附图19,本实施方式的电路板组件44的装配步骤可参阅如下:
先将底板4421固定于电路板441的底面4411,且使凸台4422部分或者全部位于第一通孔4413内。
在凸台4422与底板4421所围的区域内填充冷却液445。
再将感光芯片444通过胶材443固定于凸台4422上。此时,冷却液445被密封在感光芯片444、胶材443、凸台4422以及底板4421所围成的容纳腔446内。
在其他实施方式中,第八种实施方式也可以参阅第二种实施方式的设置方式。此时,容纳腔446内设置有凸块。冷却液445与补强板442的接触面积更大。这样,感光芯片444产生的热量能够快速地经冷却液445传输至补强板442,并经补强板442传输至摄像模组40的外部。电路板组件44的散热效果较佳。
在其他实施方式中,第八种实施方式也可以参阅第四种实施方式的设置方式。此时,容纳腔446内设置有凹槽。冷却液445与补强板442的接触面积更大。这样,感光芯片444产生的热量能够快速地经冷却液445传输至补强板442,并经补强板442传输至摄像模组40的外部。电路板组件44的散热效果较佳。
第九种实施方式,与第八种实施方式相同的技术内容不再赘述:请参阅图20以及图21,图20是图6所示的补强板442的再一种实施方式的结构示意图。图21是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。底板4421包括第一板件4226以及第二板件4227。第二板件4227层叠于第一板件4226,且第二板件4227固定连接于第一板件4226。第二板件4227可以通过粘接或者焊接等方式固定于第一板件4226。可以理解的是,第六种实施方式的底板4421为一体成型结构。而本实施方式的底板4421是第一板件4226与第二板件4227通过粘接或者焊接等方式彼此固定连接。
另外,凸台4422固定于第二板件4227远离第一板件4226的表面。第二板件4227、胶材443、凸台4422以及感光芯片444围成容纳腔446。第二板件4227设置有第二通孔4228。第二通孔4228贯穿第二板件4227朝向感光芯片444的表面以及第二板件4227远离感光芯片444的表面。第二通孔4228连通容纳腔446。
其中,部分冷却液445设置于第二通孔4228内。此时,相较于第八种实施方式的冷却液445,本实施方式的冷却液445的体积更大。这样,冷却液445能够吸收感光芯片444产生的热量更多。感光芯片444的散热效果更佳。
结合图21所示,本实施方式的电路板组件44的装配步骤可参阅如下:
先将底板4421的第二板件4227固定于电路板441的底面4411,且使凸台4422部分或者全部位于第一通孔4213内。
再将感光芯片444通过胶材443固定于凸台4422上。此时,感光芯片444、凸台4422以及底板4421围成容纳腔446。
再将装配好的感光芯片444、电路板441以及第二板件4227翻转180°,并通过第二通孔4228向容纳腔446填充冷却液445。此时,冷却液445装满容纳腔446以及第二通孔4228。
最后再将第一板件4226粘接于第二板件4227远离电路板441的表面,且第一板件4226遮盖第二通孔4228。这样,冷却液445便密封在容纳腔446与第二通孔4228内。
在其他实施方式中,第九种实施方式也可以参阅第二种实施方式的设置方式。凸块固定于第一板件4226朝向感光芯片444的表面。凸块的部分或者全部位于第二通孔4228内。此时,冷却液445与补强板442的接触面积更大。这样,感光芯片444产生的热量能够快速地经冷却液445传输至补强板442,并经补强板442传输至摄像模组40的外部。电路板组件44 的散热效果较佳。
在其他实施方式中,第九种实施方式也可以参阅第四种实施方式的设置方式。第一板件4226设置有凹槽。凹槽的开口位于第一板件4226朝向感光芯片444的表面。部分冷却液445设置于凹槽内。这样,冷却液445与补强板442的接触面积更大。这样,感光芯片444产生的热量能够快速地经冷却液445传输至补强板442,并经补强板442传输至摄像模组40的外部。电路板组件44的散热效果较佳。
第十种实施方式,与第八种实施方式相同的技术内容不再赘述:请参阅图22,图22是图4的摄像模组40的电路板组件44在C-C线处的再一种实施方式的剖面示意图。电路板组件44还包括注塑件4229。另外,注塑件4229用于将电子元器件446封装于电路板441。此时,部分注塑件4229固定于电路板441的顶面4412,且包覆电子元器件446。应理解,部分注塑件4229可以完全包覆电子元器件446,也可以部分包覆电子元器件446,也即部分电子元器件446相对注塑件4229露出。
此外,部分注塑件4229位于第一通孔4413内。部分注塑件4229覆盖感光芯片444的非感光区4442。此时,感光芯片444的感光区4441相对注塑件4229露出。这样,注塑件4229将电路板441、补强板442、感光芯片444以及电子元器件446封装为一体。电路板组件44的整体性较佳。电路板441、补强板442、感光芯片444以及电子元器件446之间的连接牢固度较佳。
在本实施方式中,注塑件4229的材质可以参阅第一种实施方式的注塑件445的材质。这里不再赘述。另外,注塑件4229的形成方式可以参阅第一种实施方式的注塑件445的形成方式。
可以理解的是,当部分注塑件4229覆盖于感光芯片444的非感光区4442时,感光芯片444产生的热量也能够经该部分注塑件4229传输出摄像模组40的外部。这样,感光芯片444的散热效果更佳。这样,感光芯片444不仅能够通过冷却液散热,还能够通过注塑件4229散热。故而,本实施方式的感光芯片444的散热效果较佳。
在其他实施方式中,第十种实施方式也可以与第九种实施方式相互结合,以构成新的实施方式。具体的这里不再赘述。
在其他实施方式中,第十种实施方式的注塑件4229也可以参阅第五种实施方式的注塑件425的设置方式。具体的这里不再赘述。
上文结合相关附图具体介绍了几种电路板组件44的结构。一方面,本申请的几种电路板组件44的感光芯片444的散热效率较高,电路板组件44的散热效果较佳,另一方面,本申请的感光芯片444与补强板442之间的连接牢固度较佳,感光芯片444与补强板442之间的连接可靠性较佳。可以理解的是,上文的电路板组件44以应用于摄像模组40为例进行描述。在其他实施例中,本申请的电路板组件44也可以应用于其他领域。例如,电路板组件44可以应用于指纹模组。电路板组件的芯片为指纹芯片。此时,指纹芯片的散热效率较高,电路板组件的散热效果较佳,另一方面,指纹芯片与补强板之间的连接牢固度较佳,指纹芯片与补强板之间的连接可靠性较佳。
以上,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以权利要求的保护范围为准。

Claims (15)

  1. 一种电路板组件,其特征在于,包括补强板、胶材、芯片、第一注塑件以及电路板;
    所述胶材固定于所述补强板的表面;
    所述芯片固定于所述胶材远离所述补强板的表面,所述补强板、所述胶材以及所述芯片围出一空间;
    所述第一注塑件位于所述空间内,且所述第一注塑件连接于所述芯片与所述补强板之间,所述第一注塑件的导热系数大于所述胶材的导热系数;
    所述电路板固定于所述补强板,所述电路板与所述芯片位于所述补强板的同一侧,所述电路板环绕所述芯片设置,所述芯片电连接于所述电路板。
  2. 根据权利要求1所述的电路板组件,其特征在于,所述补强板包括底板以及凸台,所述凸台连接于所述底板的表面;
    所述电路板固定于所述底板,且环绕所述凸台设置,所述胶材固定于所述凸台远离所述底板的表面;
    部分所述底板、所述凸台、所述胶材以及所述芯片围出所述空间。
  3. 根据权利要求2所述的电路板组件,其特征在于,所述凸台的数量为多个,多个所述凸台间隔且围成环状结构;
    部分所述第一注塑件位于多个所述凸台所围的区域内,部分所述第一注塑件位于相邻两个所述凸台之间的流道内。
  4. 根据权利要求3所述的电路板组件,其特征在于,所述补强板包括凸块,所述凸块固定于所述底板朝向所述芯片的表面,所述凸块与所述凸台位于所述底板的同一侧,所述凸块正对于所述芯片;所述第一注塑件包覆所述凸块。
  5. 根据权利要求3所述的电路板组件,其特征在于,所述底板设置有第二通孔,所述第二通孔贯穿所述底板朝向所述芯片的表面与所述底板远离所述芯片的表面,所述第二通孔正对于所述芯片;部分所述第一注塑件设置于所述第二通孔内。
  6. 根据权利要求2所述的电路板组件,其特征在于,所述凸台的数量为一个,部分所述第一注塑件环绕所述凸台设置。
  7. 根据权利要求2至6中任一项所述的电路板组件,其特征在于,所述电路板组件还包括电子元器件以及第二注塑件,所述电子元器件固定于所述电路板远离所述底板的表面,且电连接于所述电路板,所述第二注塑件固定于所述电路板与所述补强板,且包覆所述电子元器件,所述第二注塑件与所述第一注塑件为一体成型结构。
  8. 根据权利要求7所述的电路板组件,其特征在于,所述电路板组件还包括金线,所述金线一端电连接于所述芯片,另一端电连接于所述电路板;
    所述第二注塑件包覆所述金线。
  9. 根据权利要求8所述的电路板组件,其特征在于,所述芯片远离所述胶材的表面包括感应区及非感应区,所述非感应区连接于所述感应区的周缘,所述金线的一端电连接于所述非感应区,所述第二注塑件覆盖所述非感应区。
  10. 根据权利要求1至6中任一项所述的电路板组件,其特征在于,所述第一注塑件的导热系数大于或等于2W/(mⅹK)。
  11. 根据权利要求10所述的电路板组件,其特征在于,所述第一注塑件的材质包括环氧树脂模塑料。
  12. 根据权利要求1所述的电路板组件,其特征在于,
    所述胶材为DA胶;
    所述补强板包括底板以及凸台;所述凸台连接于所述底板的表面,所述电路板固定于所述底板,且环绕所述凸台设置,所述胶材固定于所述凸台远离所述底板的表面,部分所述底板、所述凸台、所述胶材以及所述芯片围出所述空间;
    所述凸台的数量为多个,多个所述凸台间隔且围成环状结构,部分所述第一注塑件位于多个所述凸台所围的区域内,部分所述第一注塑件位于相邻两个所述凸台之间的流道内;
    所述电路板组件还包括电子元器件以及第二注塑件,所述电子元器件固定于所述电路板远离所述底板的表面,且电连接于所述电路板,所述第二注塑件固定于所述电路板与所述补强板,且包覆所述电子元器件,所述第二注塑件与所述第一注塑件为一体成型结构;
    所述第一注塑件与所述第二注塑件的材质包括环氧树脂模塑料;
    所述电路板组件还包括金线,所述金线一端电连接于所述芯片,另一端电连接于所述电路板,所述第二注塑件包覆所述金线;
    所述芯片远离所述胶材的表面包括感应区及非感应区,所述非感应区连接于所述感应区的周缘,所述金线的一端电连接于所述非感应区,所述第二注塑件覆盖所述非感应区。
  13. 一种摄像模组,其特征在于,光学镜头以及如权利要求1至12中任一项所述电路板组件,所述光学镜头固定于所述电路板组件的一侧,所述光学镜头的出光侧正对于所述芯片,所述芯片用于采集穿过所述光学镜头的环境光线。
  14. 根据权利要求13所述的摄像模组,其特征在于,所述摄像模组还包括支架与滤光片,所述支架连接于所述光学镜头与所述电路板组件之间,所述滤光片固定于所述支架,所述滤光片用于过滤穿过所述光学镜头的环境光线的杂光。
  15. 一种电子设备,其特征在于,包括壳体及如权利要求13或14所述的摄像模组,所述摄像模组安装于所述壳体。
PCT/CN2021/115183 2020-09-18 2021-08-28 电路板组件、摄像模组及电子设备 WO2022057597A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI832587B (zh) * 2022-06-06 2024-02-11 同欣電子工業股份有限公司 感測鏡頭

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115802129A (zh) * 2021-09-10 2023-03-14 荣耀终端有限公司 一种摄像头模组和电子设备
CN117750172A (zh) * 2022-09-09 2024-03-22 信扬科技(佛山)有限公司 感光组件、摄像模组及电子装置
TWI819941B (zh) * 2022-12-30 2023-10-21 新煒科技有限公司 相機模組

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203456452U (zh) * 2012-08-29 2014-02-26 美国博通公司 集成电路封装件
US20180374776A1 (en) * 2016-01-11 2018-12-27 Intel Corporation Multiple-chip package with multiple thermal interface materials
CN109637983A (zh) * 2017-10-06 2019-04-16 财团法人工业技术研究院 芯片封装
CN110557881A (zh) * 2018-05-31 2019-12-10 南昌欧菲生物识别技术有限公司 电路板组件、光电模组、深度相机及电子装置
CN210725022U (zh) * 2019-11-27 2020-06-09 南昌欧菲光电技术有限公司 感光组件、摄像模组及电子设备
CN211266953U (zh) * 2020-01-10 2020-08-14 南昌欧菲光电技术有限公司 感光组件、摄像模组及电子设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203456452U (zh) * 2012-08-29 2014-02-26 美国博通公司 集成电路封装件
US20180374776A1 (en) * 2016-01-11 2018-12-27 Intel Corporation Multiple-chip package with multiple thermal interface materials
CN109637983A (zh) * 2017-10-06 2019-04-16 财团法人工业技术研究院 芯片封装
CN110557881A (zh) * 2018-05-31 2019-12-10 南昌欧菲生物识别技术有限公司 电路板组件、光电模组、深度相机及电子装置
CN210725022U (zh) * 2019-11-27 2020-06-09 南昌欧菲光电技术有限公司 感光组件、摄像模组及电子设备
CN211266953U (zh) * 2020-01-10 2020-08-14 南昌欧菲光电技术有限公司 感光组件、摄像模组及电子设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI832587B (zh) * 2022-06-06 2024-02-11 同欣電子工業股份有限公司 感測鏡頭

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