Patent Publication Number: US-2021185804-A1

Title: Circuit board assembly and semi-finished product thereof, floodlight, camera module and application thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present patent application is a continuation of International Application No. PCT/CN2019/097757, filed on Jul. 25, 2019, which claims priorities to Chinese Patent Application No. 201810972689.2, filed before the China National Intellectual Property Administration (CNIPA) on Aug. 24, 2018, and Chinese Patent Application No. 201821378621.3, filed before the CNIPA on Aug. 24, 2018. All of the aforementioned patent applications are hereby incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the field of circuit boards, and more particularly, to a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and applications thereof. 
     BACKGROUND 
     Circuit boards are important components in electronic equipment, which can support electronic components and communicate electrical signals. There are various types of circuit boards, and the most common is printed circuit boards. The printed circuit board mainly includes two parts, an insulating part and a conducting part. When an electronic component supported by a printed circuit board is activated after power on, the electronic component can generate heat due to its own power consumption, especially in the optical field. Once the heat generated by the electronic component cannot be dissipated, the temperature of the electronic component itself will rise, which is detrimental to the normal operation of the electronic component. 
     At present, the plates widely used in printed circuit board are copper-clad/epoxy glass cloth substrate or phenolic resin glass cloth substrate. These substrates have excellent electrical properties and processability, but have poor heat dissipation. However, with the miniaturization of electronic devices, electronic devices themselves are designed to be smaller and smaller, and therefore heat dissipation by only a small surface of the electronic devices is not enough. 
     Further, in the process of mounting the electronic components on the surface of the printed circuit board, it is generally necessary to fixedly connect electronic components through pads. This operation needs to be done at a high temperature. However, the thermal expansion coefficients of the insulating part and the conductive part of the printed circuit board are different, and the pads themselves are small in size, which may make alignment between the electronic components and the printed circuit board difficult, particularly for electronic components with high accuracy requirements, such as photovoltaic modules. 
     Ceramic substrates are a class of circuit boards with superior performance, and their electrical insulation performance, thermal conductivity, and mechanical strength are excellent. However, it is difficult to apply ceramic substrates to various electronic devices on a large scale. Because the basic manufacturing process of ceramic substrates is complex, the production capacity is low, and the cost is high. 
     The fever problem of electronic components is partially alleviated by the addition of heat dissipating blocks to the printed circuit board, but is contrary to the current trend of miniaturization and lightweight of electronic devices. 
     SUMMARY 
     It is an object of the present disclosure to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module and an application thereof, wherein the circuit board has good heat dissipation performance. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module and an application thereof, wherein the circuit board is manufactured at a relatively low cost. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module and an application thereof, wherein the circuit board is manufactured in a simple manner and is convenient for large-scale application. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and applications thereof, wherein the circuit board includes an insulating portion and at least one conductive portion, and wherein the conductive portion provides a large area for heat dissipation of an electro component. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and an application thereof, wherein the conductive portion has a large upper surface to facilitate accurate mounting of the electronic component on the conductive portion. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module and an application thereof, wherein the circuit board has a good conductive property. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and an application thereof, wherein the insulating portion of the circuit board is integrally molded to the conductive portion. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module and an application thereof, wherein the circuit board has high mechanical strength. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and an application thereof, wherein the circuit board can have better heat dissipation performance while maintaining a smaller size. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, an camera module, and an application thereof, wherein by the manufacturing method, the circuit board can be manufactured in batches, thereby reducing the production cost. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and an application thereof, wherein at least part of the insulating portion can be integrally molded around the conductive portion to prevent a short circuit from occurring. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and an application thereof, wherein a TOF camera module with the circuit board can have better heat dissipation performance while maintaining a smaller size. 
     Another object of the present disclosure is to provide a circuit board assembly and a semi-finished product thereof, a floodlight, a camera module, and an application thereof, wherein the TCF camera module with the circuit board includes a base, and the base can be integrally molded to the circuit board. 
     According to one aspect of the present disclosure, there is provided a circuit board assembly for supporting an electronic component, including:
         a conductive portion; and   an insulating portion, integrally bonded to the conductive portion, wherein the conductive portion comprises a first conductive portion and a second conductive portion, and the electronic component is supported by the first conductive portion, wherein the first conductive portion extends through the insulating portion, and the first conductive portion and the second conductive portion are separated by at least part of the insulating portion, and wherein the first conductive portion has an upper surface, the second conductive portion has an upper surface, and the upper surface of the first conductive portion is larger than the upper surface of the second conductive portion.       

     According to some embodiments of the present disclosure, the first conductive portion has a side surface, and the side surface is arranged to be inclined. 
     According to some embodiments of the present disclosure, the side surface is arranged to be inclined inwardly. 
     According to some embodiments of the present disclosure, the side surface is arranged in a step shape. 
     According to some embodiments of the present disclosure, the first conductive portion has an upper surface and a lower surface, wherein the upper surface and the lower surface are oppositely disposed, wherein the upper surface is larger than the lower surface. 
     According to some embodiments of the present disclosure, the circuit board assembly further includes a connecting member, wherein the connecting member has two ends, one end of the connector is connected to the conductive portion, the other end of the connector is exposed, and wherein the insulating portion is integrally molded to the connecting member. 
     According to some embodiments of the present disclosure, the conductive portion has a side surface, and at least part of the insulating portion is integrally bonded to the side surface of the conductive portion. 
     According to some embodiments of the present disclosure, the side surface of the conductive portion is covered by the insulating portion completely. 
     According to some embodiments of the present disclosure, the circuit board assembly further includes a bracket, wherein the bracket forms a light window and the bracket is connected to the circuit board, and wherein the light window provides a light-passing path for the electronic component. 
     According to some embodiments of the present disclosure, the bracket is connected to the circuit board by a connecting medium. 
     According to some embodiments of the present disclosure, the bracket is integrally coupled to the conducive portion. Alternatively, the bracket is integrally coupled to the insulating portion. Alternatively, the bracket is integrally coupled to the conductive portion and the insulating portion. 
     According to some embodiments of the present disclosure, the conductive portion includes a third conductive portion and a fourth conductive portion, wherein the insulating portion is integrally molded to the third conductive portion and the fourth conductive portion, and wherein the first conductive portion, the second conductive portion, the third conductive portion, and the fourth conductive portion are separated by the insulating portion, respectively. 
     According to another aspect of the present disclosure, there is provided a semi-finished product of a circuit board assembly comprising:
         a plurality of conductive portions and a plurality of insulating portions, wherein each of the conductive portions includes a first conductive portion and a second conductive portion, wherein the insulating portions are integrally molded to the first conductive portion and the second conductive portion, and for each conductive portion, the first conductive portion and the second conductive portion are separated by at least part of the insulating portion, and wherein adjacent conductive portions are connected to each other.       

     According to some embodiments of the present disclosure, the first conductive portion of one of the conductive portions is connected to the first conductive portion of an adjacent one of the conductive portions. 
     According to some embodiments of the present disclosure, the second conductive portion of one of the conductive portions is connected to the second conductive portion of an adjacent one of the conductive portions. 
     According to some embodiments of the present disclosure, the second conductive portion of one of the conductive portions is connected to the second conductive portion of an adjacent one of the conductive portions. 
     According to some embodiments of the present disclosure, the first conductive portion of one of the conductive portions is connected to the second conductive portion of an adjacent one of the conductive portions. 
     According to some embodiments of the present disclosure, the first conductive portion has an upper surface, and the second conductive portion has an upper surface, wherein the upper surface of the first conductive portion is larger than the upper surface of the second conductive portion. 
     According to some embodiments of the present disclosure, the first conductive portion has an upper surface and a lower surface that are oppositely disposed, wherein the upper surface of the first conductive portion is larger than the lower surface of the first conductive portion. 
     According to some embodiments of the present disclosure, the first conductive portion has a side surface, and the side surface is arranged to be inclined. 
     According to some embodiments of the present disclosure, the first conductive portion has a side surface, and the side surface is arranged in a step shape. 
     According to some embodiments of the present disclosure, the conductive portion includes a third conductive portion, wherein at least part of the insulating portion separates the first conductive portion and the third conductive portion, and at least part of the insulating portion separates the second conductive portion and the third conductive portion. 
     According to some embodiments of the present disclosure, the semi-finished product of the circuit board assembly further includes a plurality of brackets, and each of the brackets surrounds to form a light window. The brackets are integrally molded to the conductive portion. Alternatively, the brackets are integrally molded to the insulating portions. 
     According to another aspect of the present disclosure, there is provided a circuit board which is formed by dividing the semi-finished product of the circuit board assembly as described above. 
     According to another aspect of the present disclosure, there is provided a floodlight, comprising:
         a light-emitting element;   a circuit board assembly, formed by dividing the semi-finished product of the circuit board assembly as described above; and   a bracket, forming a light window, wherein the light-emitting element is supported by a first conductive portion of the circuit board assembly, and the bracket is connected to the circuit board assembly.       

     According to some embodiments of the present disclosure, the bracket is integrally molded to the circuit board assembly. 
     According to some embodiments of the present disclosure, the bracket is adhered to the circuit board assembly. 
     According to another aspect of the present disclosure, there is provided a TOF camera module, comprising:
         a floodlight as described above, wherein the floodlight is used to emit a light ray to a subject to be photographed; and   a receiving unit, configured to receive a reflected light ray reflected by the subject to be photographed, and obtain a depth information of the subject to be photographed based on information of the emitted light ray and the reflected light ray.       

     According to another aspect of the present disclosure, there is provided a TOF camera module, comprising:
         a floodlight as described above; and   a receiving unit having a flexible circuit board, and the receiving unit including a lens assembly, a photosensitive element, a circuit board, and a flexible circuit board, wherein the lens assembly provides an light-passing path for light to reach the photosensitive element for photoelectric conversion, and wherein the photosensitive element is conductively connected to the circuit board, the circuit board is conductively connected to the flexible circuit board, and the floodlight is conductively connected to the flexible circuit board.       

     According to another aspect of the present disclosure, there is provided a floodlight, comprising:
         a light-emitting element;   a circuit board assembly, formed by dividing the semi-finished product of the circuit board assembly;   a bracket, forming a light window, wherein the light-emitting element is supported by a first conductive portion of the circuit board assembly, and the bracket is connected to the circuit board assembly; and   a flexible circuit board, conductively connected to the conductive portion of the circuit board assembly;   wherein the semi-finished product of the circuit board assembly includes:   a plurality of conductive portions and a plurality of insulating portions, wherein each of the conductive portions includes a first conductive portion and a second conductive portion, wherein the insulating portions are integrally molded to the first conductive portion and the second conductive portion, and the first conductive portion and the second conductive portion are separated by at least part of the insulating portion, and wherein adjacent conductive portions are connected to each other.       

     According to another aspect of the present disclosure, there is provided a TOE camera module, comprising:
         a floodlight as described above; and   a receiving unit, including a lens assembly, a photosensitive element, and a circuit board, wherein the lens assembly provides a light-passing path for light to reach the photosensitive element for photoelectric conversion, and wherein the photosensitive element is conductively connected to the circuit board, and the flexible circuit board of the floodlight is conductively connected to the circuit board of the receiving unit.       

     According to another aspect of the present disclosure, there is provided an electronic device, comprising:
         a floodlight as described above;   an electronic device body; and   a main circuit board, disposed on the electronic device body, wherein the flexible circuit board of the floodlight is conductively connected to the main circuit board when the floodlight is mounted on the main circuit board.       

     According to some embodiments of the present disclosure, the electronic device includes a receiving unit, wherein the receiving unit and the floodlight are assembled as a whole to be installed together on the electronic device body. 
     According to another aspect of the present disclosure, there is provided a TOF camera module, comprising:
         a floodlight, used to emit a light ray to a subject to be photographed; and   a receiving unit, configured to receive a reflected light ray reflected by the subject to be photographed, and obtain a depth information of the subject to be photographed based on information of the emitted light ray and the reflected light ray, wherein the floodlight includes a TOF light-emitting element and a circuit board assembly formed by dividing the semi-finished product of the circuit board assembly as described above, and wherein the TOF light-emitting element is supported by the conductive portion of the circuit board assembly.       

     According to another aspect of the present disclosure, there is provided an electronic device comprising:
         an electronic device body and a TOF camera module as described above, wherein the TOF camera module is disposed on the electronic device body.       

     According to some embodiments of the present disclosure, the electronic device includes a receiving unit, wherein the receiving unit and the floodlight are assembled as a whole to be installed together on the electronic device body. 
     According to another aspect of the present disclosure, there is provided a method of manufacturing a circuit board assembly for supporting at least one electronic component, comprising the steps of:
         (a) placing at least one conductive portion into a molding die;   (b) performing a mold closing process by the molding die to form a molding space between the conductive portion and an upper mold and a lower mold and of the molding die;   (c) adding a fluid material having an insulating property to the molding space so that the fluid material fills the molding space and solidifies within the molding space; and   (d) after a mold drawing process is performed by the molding die, forming an insulating portion integrally bonded to the conductive portion on each of the conductive portions to obtain the circuit board assembly.       

     According to an embodiment of the present disclosure, in the above method, the conductive portion includes a first conductive portion and a second conductive portion, wherein the insulating portion is formed between the first conductive portion and the second conductive portion to separate the first conductive portion and the second conductive portion. 
     According to an embodiment of the present disclosure, in the above method, the insulating portion integrally bonded to the conductive portion and a bracket are formed on the conductive portion. 
     According to an embodiment of the present disclosure, the bracket is integrally bonded to the conductive portion. Alternatively, the bracket is integrally bonded to the insulating portion located on a side surface of the conductive portion. Alternatively, the bracket is integrally bonded to the conductive portion and the insulating portion. 
     According to an embodiment of the present disclosure, in the above method, the method further comprises the steps of:
         drawing the molding die to form a semi-finished product of the circuit board assembly, wherein the semi-finished product of the circuit board assembly includes a plurality of conductive portions and the insulating portions integrally bonded to the conductive portions; and   dividing the semi-finished product of the circuit board assembly to obtain the circuit board assembly.       

     According to an embodiment of the present disclosure, in the above method, at least part of the insulating portion integrally bonded to a side surface of the conductive portion is formed on the conductive portion. 
     According to an embodiment of the present disclosure, in the above method, at least part of the insulating portion integrally bonded to an upper surface of the conductive portion is formed on the conductive portion. Alternatively, at least part of the insulating portion integrally bonded to a lower surface of the conductive portion is formed on the conductive portion. 
     According to an embodiment of the present disclosure, in the above method, when at least part of the insulating portion is integrally bonded to a lower surface of the conductive portion, the method further includes a step of reducing a thickness of the insulating portion to expose the lower surface of the conductive portion. 
     According to an embodiment of the present disclosure, in the above method, each of the conductive portions is independent of each other, 
     According to an embodiment of the present disclosure, in the above method, a conductive portion is connected to an adjacent conductive portion. 
     According to another aspect of the present disclosure, there is provided a heat dissipation method of a circuit board assembly, comprising the steps of:
         directing heat generated by an electronic component to be transferred from a back surface of the electronic component to an upper surface of a first conductive portion;   conducting heat to a lower surface of the first conductive portion; and   dissipating the heat outward.       

     According to an embodiment of the present disclosure, in the above method, the electronic element is a light-emitting element. 
     According to an embodiment of the present disclosure, in the above method, a front surface of the electronic component is conductively connected to a second conductive portion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 1B  is a schematic diagram of a TOF camera module with a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 1C  is a schematic diagram of an electronic device according to an embodiment of the present disclosure. 
         FIG. 2A  is a schematic diagram of a manufacturing process of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 2B  is a schematic diagram of a manufacturing process of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 3  is a schematic diagram of a semi-finished product of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 4  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 5A  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 5B  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 5C  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 5D  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 6  is a schematic diagram of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 7  is a schematic diagram of a TOF camera module with a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 8A  is a schematic diagram of a manufacturing process of a circuit board assembly according to an embodiment of the present disclosure, 
         FIG. 8B  is a schematic diagram of a manufacturing process of a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 9  is a schematic diagram of a TOF camera module with a circuit board assembly according to an embodiment of the present disclosure. 
         FIG. 10A  is a schematic diagram of an application of a floodlight according to an embodiment of the present disclosure. 
         FIG. 10B  is a schematic diagram of an application of a floodlight according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The following description is intended to disclose the invention to enable those skilled in the art to practice the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the disclosure defined in the following description may be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions without departing from the spirit and scope of the disclosure. 
     It will be understood by those skilled in the art that in the present disclosure, the orientation or positional relationship indicated by the terms “longitudinal,” “transverse,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” and the like is based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely intended to facilitate the description of the present disclosure and to simplify the description, rather than indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore these terms should not be construed as limiting the present disclosure. 
     It will be understood that the terms “a” should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, and in another embodiment, the number of the element may be multiple. The term “a” cannot be understood as a restriction on quantity. 
     Referring to  FIGS. 1A to 1C , an embodiment of a circuit board assembly  1  and an application of the circuit board assembly  1  in accordance with the present disclosure is shown. 
     The circuit board assembly  1  is used for supporting an electronic component and helping the electronic component to dissipate heat in an operating state so as to keep the electronic component in a good operating state. 
     More specifically, the circuit board assembly  1  includes a circuit board  10  including a conductive portion  11  and an insulating portion  12 . The insulating portion  12  is integrally coupled to the conductive portion  11 , and the conductive portion  11  extends through the insulating portion  12 , for example, in the height direction. That is, both ends of the conductive portion  11  are at least partially exposed to the outside, so that both ends of the conductive portion  11  can be respectively conducted. On the one hand, the conductive portion  11  can be conductive, and on the other hand, it can help the electronic component to dissipate heat. 
     The electronic component is supported on the conductive portion  11  and communicably connected to the conductive portion  11 . More specifically, the conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 . The first conductive portion  111  is used to support the electronic component, and the second conductive portion  112 . and the first conductive portion  111  are spaced apart by the insulating portion  12 , so that the first conductive portion  111  and the second conductive portion  112  are not in direct contact, thereby avoiding short-circuiting during use. 
     The first conductive portion  111  has an upper surface, a lower surface and a side surface, wherein the side surface extends at peripheral positions of the upper surface and the lower surface, and the upper surface and the lower surface are oppositely disposed. The electronic component is supported on the upper surface of the first conductive portion  111 . 
     The second conductive portion  112  has an upper surface, a lower surface and a side surface, wherein the side surface extends at peripheral positions of the upper surface and the lower surface, and the upper surface and the lower surface are oppositely disposed. 
     The electronic component has an upper surface and a lower surface. The lower surface of the electronic component is connected to the upper surface of the first conductive portion  111 . Further, pads on the upper surface of the electronic component are communicated. to the second conductive portion  112  by a gold wire process, and the lower surface of the electronic component is directly communicated to the upper surface of the first conductive portion  111 . That is, the lower surface of the electronic component is implemented as an electrode, and the other electrode is provided on the upper surface of the electronic component and is conducted through the pads. 
     Further, the first conductive portion  111  is designed as a larger region to facilitate heat dissipation of the electronic component. Preferably, the first conductive portion  111  is designed as a larger region, and the second conductive portion  112  is designed as a smaller region. The first conductive portion  111  has a heat dissipation function in addition to conducting electricity. The second conductive portion  112  mainly functions to conducting electricity. In order to further ensure that the circuit board  10  is miniaturized while having a good heat dissipation performance, it is preferable that the overall size of the first conductive portion  111  is larger than that of the second conductive portion  112 . 
     Note that the insulating portion  12  is bonded to the conductive portion  11  by an integrated molding process. In this way, the manufacturing process of the circuit board  10  is simplified, and the insulating portion  12  and the conductive portion  11  have a certain bonding strength. The conductive portion  11  is sized so that the circuit board  10  has good heat dissipation performance. 
     Further, the upper surface of the first conductive portion  111  is provided with a larger size to facilitate heat dissipation of the electronic component. The upper surface of the first conductive portion  111  is larger than the upper surface of the second conductive portion  112  to facilitate area saving. Preferably, while the upper surface of the first conductive portion  111  is designed to be of a larger size, the lower surface of the first conductive portion  111  is designed to be of a smaller size, so that the side surface of the first conductive portion  111  is provided to be inclined to facilitate the bonding strength of the first conductive portion  111  and the insulating portion  12  in the surrounding portion thereof. Further, when the lower surface of the first conductive portion  111  is designed to be a small size, it is possible to effectively prevent the lower surface of the first conductive portion  111  is too large to affect normal conduction, such as causing a short circuit, or the like, when the circuit board  10  needs to be conducted. Note that the upper surface of the first conductive portion  111  should be designed according to requirements, i.e., according to the size of the electronic component. 
     In other embodiments of the present disclosure, the upper surface of the first conductive portion  111  is provided smaller than the lower surface of the first conductive portion  111 . In other embodiments of the present disclosure, the upper surface of the first conductive portion  111  is provided equal to the lower surface of the first conductive portion  111 . 
     The conductive portion  11  may be a single metal or an alloy or even a conductive material of other materials having thermal conductivity, such as copper, nickel, aluminum or other materials having excellent thermal conductivity and electrical conductivity. It will be appreciated that the first conductive portion  111  and the second conductive portion  112  may be made of the same material or may be made of different materials. 
     The conductive portion  11  has a certain shape. In the present embodiment, the conductive portion  11  is provided in a rectangular-like structure, and the upper surface of the first conductive portion  111  and the upper surface of the second conductive portion  112  are both rectangular. The shape of the upper surface of the first conductive portion  111  and the shape of the upper surface of the second conductive portion  112  may be triangular, polygonal, or circular. The shape of the upper surface of the first conductive portion  111  may be similar to that of the upper surface of the second conductive portion  112 , or may be different, for example, a circular shape or a rectangular shape. It will be appreciated that the above examples do not limit the first conductive portion  111  and the second conductive portion  112 . 
     Further, in this example, the first conductive portion  111  has a boss structure in the stereoscopic space, and the second conductive portion  112  has a rectangular parallelepiped structure in the stereoscopic space. The first conductive portion  111  may be a rectangular parallelepiped, and the second conductive portion  112  may be a boss structure. Alternatively, both the first conductive portion  111  and the second conductive portion  112  have a boss structure. Alternatively, both the first conductive portion  111  and the second conductive portion  112  are rectangular parallelepiped. It will be appreciated that the above examples do not limit the first conductive portion  111  and the second conductive portion  112 . 
     The conductive portion  11  may be first formed by a die stamping process or a chemical etching process, and then the insulating portion  12  is formed by an integral molding process at the conductive portion  11 . 
     Further, the insulating portion  12  includes an insulating body  121  and an insulating frame  122 . The insulating frame  122  is integrally formed on the insulating body  121 , and the insulating frame  122  is located around the insulating body  121 . The insulating body  121  is formed between the first conductive portion  111  and the second conductive portion  112  of the conductive portion  11 . The insulating body  121  separates the first conductive portion  111  and the second conductive portion  112  so that the first conductive portion  111  and the second conductive portion  112  cannot be directly contacted, thereby preventing the first conductive portion  111  and the second conductive portion  112  from being directly contacted and causing a short circuit. 
     The conductive portion  11  has an upper surface, a lower surface and a side surface, wherein the upper surface and the lower surface are oppositely disposed, and the side surface extends at peripheral positions of the upper surface and the lower surface. The upper surface of the conductive portion  11  includes the upper surface of the first conductive portion  111  and the upper surface of the second conductive portion  112 . The lower surface of the conductive portion if includes the lower surface of the first conductive portion  111  and the lower surface of the second conductive portion  112 . The side surface of the conductive portion  11  includes a portion of the side surface of the first conductive portion  111  and a portion of the side surface of the second conductive portion  112 . 
     The insulating frame  122  is formed on the side surface of the conductive portion  11 . In this example, the insulating frame  122  is integrally bonded to the side surface of the conductive portion  11 , so that on the one hand, the conductive portion  11  is protected, and on the other hand, the side surface of the conductive portion  11  can be prevented from being partially exposed, thereby causing an abnormality such as a short circuit. 
     Referring to  FIG. 1B , embodiment of an application of the circuit board assembly  1 , a TOF camera module  100 , according to the present disclosure is shown. 
     TOF refers to Time of Flight, which performs measurement of the three-dimensional structure or three-dimensional contour of the measured object or the measured area by measuring the time interval t between transmission and reception of the emitted pulse signal or the phase (phase difference ranging method) generated by the laser to and fro the measured object at a time. A device manufactured by using a TOF principle can obtain a gray-scale image and a distance image, and is widely applied in various fields such as feeling control, behavior analysis, monitoring, automatic driving, artificial intelligence, and the like. 
     The TOF camera module  100  includes a floodlight  110  for generating a light ray to a subject to be photographed, the light ray being reflected by the subject, and a receiving unit  120  for receiving the reflected light ray and obtaining depth information of the subject to be photographed according to the information of the emitted light ray and the reflected light ray. 
     The receiving unit  120  includes a lens assembly  1201  for receiving light and a photosensitive circuit  1202  for receiving the light and converting the optical signal to an electrical signal based on a photoelectric conversion principle. The lens assembly  1201  further includes an optical lens  12011  and a base  12012 , and the photosensitive circuit  1202  includes a photosensitive element  12021  and a circuit board  12022 . The optical lens  12011  and the floodlight  110  are respectively supported on the base  12012 , and the photosensitive element  12021  is conductively connected to the circuit board  12022 . In this example, the base  12012  is integrally molded to the circuit board  12022 . The floodlight  110  is conductively connected to the base  12012 . 
     In the present embodiment, the electronic component is implemented as a light-emitting element  2 , and the floodlight  110  includes the light-emitting element  2  and the circuit board assembly  1 . The light-emitting element  2  is supported from the circuit board assembly  1  and communicably connected to the circuit board assembly  1 . The light-emitting element  2  can be excited to emit light outwardly after being powered. 
     The light-emitting element  2  has a front surface and a back surface. The front surface of the light-emitting element  2  is communicated with the second conductive portion  112  of the conductive portion  11  through a wire, and the back surface of the light-emitting element  2  is directly supported by the conductive portion  11  and communicated with the conductive portion  11 . 
     The circuit board assembly  1  includes the circuit board  10  and a bracket  20 . The bracket  20  is disposed on the circuit board assembly  1 , for example, the bracket  20  is integrally molded to the circuit board assembly  1 . The circuit board assembly  1  includes the conductive portion  11  and the insulating portion  12 . The conductive portion  11  includes the first conductive portion  111  and the second conductive portion  112 . The first conductive portion  111  and the second conductive portion  112  are separated by the insulating portion  12  to avoid direct contact between the first conductive portion  111  and the second conductive portion  112 . It will be appreciated that the bracket  20  may be attached to the circuit board  10  after the circuit board  10  has been molded. For example, the bracket  20  is attached to the circuit board  10  by a connecting medium such as glue. 
     The floodlight  110  further includes an optical auxiliary element  3 . The bracket  20  supports the optical auxiliary element  3  on the circuit board  10  and the optical auxiliary element  3  is held in a light-passing path of the light-emitting element  2 . The optical auxiliary element  3  is used to change or improve the light emitted by the light-emitting element  2 , for example, to change the light emitted by the light-emitting element  2  in a refractive, diffractive and filter manner. The optical auxiliary element  3  may be a refractive lens or a diffractive lens. It will be appreciated by those skilled in the art that the above examples do not limit the type of the optical auxiliary element  3 . The bracket  20  has a light window  21 . The light-emitting element  2  cooperates with the bracket  20  to form the light window  21  so that light is emitted outwardly through the light window  21 . 
     Further, in some examples of the present disclosure, the light-emitting element  2  may be implemented as a Vertical-Cavity Surface-Emitting Laser (VCSEL). After energization, the Vertical-Cavity Surface-Emitting Laser can be energized to emit laser light. 
     It should be noted that the Vertical-Cavity Surface-Emitting Laser needs to be maintained at a certain temperature range to be able to operate normally, that is, the heat dissipation performance of the circuit board assembly  1  is important to the operating state of the Vertical-Cavity Surface-Emitting Laser. Since the first conductive portion  111  of the circuit board assembly  1  provides a large heat dissipation area, the Vertical-Cavity Surface-Emitting Laser can operate normally when supported on the first conductive portion  111 . 
     Further, a back surface of the Vertical-Cavity Surface-Emitting Laser is a negative electrode, and a front surface of the Vertical-Cavity Surface-Emitting Laser is a positive electrode. When the Vertical-Cavity Surface-Emitting Laser is respectively communicated with the first conductive portion  111  and the second conductive portion  112 , the first conductive portion  111  is a negative electrode, and the second conductive portion  112  is a positive electrode. 
     The floodlight  110  further includes at least one electronic device  4 . The electronic device  4  is conductively connected to the circuit board assembly  1 . In this example, at least part of the electronic device  4  is disposed on the circuit board  12022  of the receiving unit  120  and is covered by the base  12012 . The electronic device  4  is conductively connected to the circuit board assembly  1 . Specifically, the electronic device  4  is conductively connected to the circuit board assembly  1  of the floodlight  110  through the circuit board  12022  of the receiving unit  120 . 
     Referring to  FIG. 1C , an embodiment of an electronic device  1000  according to the present disclosure is shown. The electronic device  1000  includes the TOF camera module  100  and an electronic device body  200 . The TOF camera module  100  is disposed on the electronic device body  200  to obtain depth image information. 
     Referring to  FIGS. 2A and 2B , an embodiment of a method of manufacturing a circuit board assembly  1  according to the present disclosure is illustrated. The circuit board assembly  1  is used to support an electronic component and to help the electronic component to dissipate heat in an operating state so as to maintain the electronic component in a good operating state. 
     At the stage shown in  FIG. 2A , at least one conductive portion  11  is fixed in a molding die  300  to perform a molding process by the molding die  300 . 
     Specifically, the molding die  300  includes an upper mold  301  and a lower mold  302 . At least one of the upper mold  301  and the lower mold  302  can be operated to enable the molding die  300  to be subjected to mold closing and drawing operations. For example, in one embodiment of the present disclosure, a molding space  303  is formed between the upper mold  301  and the lower mold  302  after the conductive portion  11  is placed in the lower mold  302  and the upper mold  301  is subjected to a mold closing operation. That is, the lower mold  302  and the upper mold  301  communicate with each other after performing a mold closing operation. The upper mold  301 , the lower mold  302  and the conductive portion  11  define the molding space  303 . A fluid material can fill the molding space  303  to form the insulating portion  12  integrally bonded to the conductive portion  11 . 
     With continued reference to  FIG. 2A , the upper mold  301  further includes an upper molding portion  3011  and an upper pressing portion  3012 . The upper pressing portion  3012  is provided at the periphery of the upper molding portion  3011  so that the upper pressing portion  3012  of the upper mold  301  can be pressed against an upper surface of the upper mold  301  after the molding die  300  is subjected to a mold closing process. 
     The upper molding portion  3011  has a lower surface. When the molding die  300  is subjected to a mold closing process, a part of the lower surface of the upper molding portion  3011  is pressed against the conductive portion  11 , and the part of the lower surface of the upper molding portion  3011  and an upper surface of a corresponding part of the lower mold  302  form the molding space  303  for the passage of the fluid material. 
     In this example, since the upper and lower surfaces of the circuit board  10  of the circuit board assembly  1  are flat, the corresponding lower surface of the upper molding portion  3011  and the corresponding upper surface of the lower mold  302  are flat. The structure of the entire molding die  300  is simple, and the manufacturing difficulty and the manufacturing cost are low. 
     Further, the upper molding portion  3011  includes at least one conductive portion pressing portion  30111  and at least one insulating position molding portion  30112 . The conductive portion pressing portion  30111  further includes a first conductive portion pressing portion  301111  and a second conductive portion pressing portion  301112 . One of the insulating position molding portions  30112  is located between the first conductive portion pressing portion  301111  and an adjacent first conductive portion pressing portion  301111 , and one of the insulating position molding portions  30112  is located between the first conductive portion pressing portion  301111  and an adjacent second conductive portion pressing portion  301112 . 
     According to some embodiments of the present disclosure, the insulating position molding portion  30112  is located between the second conductive portion pressing portion  301112  and the adjacent second conductive portion pressing portion  301112 . 
     The lower mold  302  includes a lower molding portion  3021  and a lower pressing portion  3022 . provided at a peripheral position of the lower molding portion  3021  so that the lower pressing portion  3022  of the lower mold  302  can support the upper pressing portion  3012  of the upper mold  301  when the molding die  300  is subjected to a mold closing process. 
     The lower molding portion  3021  includes at least one supporting portion  30211  and at least one lower molding guide portion  30212 . The supporting portion  30211  and the lower molding guide portion  30212  are provided at intervals. The supporting portion  30211  corresponds to the lower surface of the conductive portion  11 , and the lower molding guide portion  30212  corresponds to the insulating position molding portion  30112 . The molding space  303  is formed between the lower molding guide portion  30212  and the insulating position molding portion  30112  to form the insulating portion  12  integrally bonded to conductive portion  11  in a subsequent step. 
     Further, the supporting portion  30211  includes a first conductive portion supporting portion  302111  and a second conductive portion supporting portion  302112 . Alternatively, when the number of the conductive portions  11  is a plurality, at least one lower molding guide portion  30212  is located between the first conductive portion supporting portion  302111  and an adjacent second conductive portion supporting portion  302112 , at least one lower molding guide portion  30212  is located between the first conductive portion supporting portion  302111  and an adjacent first conductive portion supporting portion  302111 , and at least one lower molding guide portion  30212  is located between the second conductive portion supporting portion  302112  and an adjacent second conductive portion supporting portion  302112 . 
     When a mold closing operation is performed by the molding die  300 , the distance between the conductive portion pressing portion  30111  of the upper molding portion  3011  of the upper mold  301  and the supporting portion  30211  of the lower molding portion  3021  of the lower mold  302  is set to exactly accommodate the conductive portion  11 , so as to avoid contamination of the upper surface of the conductive portion  11  by the fluid material. 
     In this example, the insulating portion  12  integrally formed on the conductive portion  11  can not only separate the first conductive portion  111  from the second conductive portion  112 , but also cover the side surface of the conductive portion  11 . In other embodiments of the present disclosure, the insulating portion  12  integrally molded to the conductive portion  11  separates the first conductive portion  111  and the second conductive portion  112 , and covers a portion of the side surface of the conductive portion  11 . In other embodiments of the present disclosure, the insulating portion  12  integrally molded to the conductive portion  11  is formed only on the first conductive portion  111  and the second conductive portion  112  of the conductive portion  11 . 
     Further, the molding die  300  may further include at least one film layer  304 . For example, in this particular example of the present disclosure, the number of film layers  304  may be implemented as two, wherein one of the film layers  304  is disposed on the lower surface of the upper mold  301  and the one film layer  304  and the lower surface of the upper mold  301  overlap each other, and the other one of the film layers  304  is disposed on the inner surface of the lower mold  302  and the other one film layer  304  and the upper surface of the lower mold  302  overlap each other. The film layer  304  may be attached to the lower surface of the upper mold  301  such that the film layer  304  and the inner surface of the upper mold  301  are connected to each other in an overlapping manner, and the film layer  304  may be attached to the upper surface of the lower mold  302  such that the film layer  304  and the upper surface of the lower mold  302  are connected to each other in an overlapping manner. 
     The film layer  304  can act as a buffer to reduce damage, such as scratches, to the conductive portion  11  during production. 
     When the molding die  300  is subjected to a mold closing operation, the film layers  304  are held between the conductive portion  11  and the conductive portion pressing portion  30111  of the upper molding portion  3011  of the upper mold  301 , and between the conductive portion  11  and the supporting portion  30211  of the lower molding portion  3021  of the lower mold  302 , respectively, so that the film layers  304  prevent a gap from being formed between the upper and lower molds  301  and  302  and the conductive portion  11  by deforming during compression, whereby the fluid material is prevented from entering the upper surface and the lower surface of the conductive portion  11  in a subsequent molding process. Therefore, both the upper and lower sides of the circuit board assembly  1  that is finally formed can be directly conducted through the conductive portion  11 , thereby avoiding contamination of the conductive portion  11 , particularly the upper surface of the conductive portion  11 , to ensure product yield of the circuit board assembly  1 . 
     The upper pressing portion  3012  of the upper mold  301  and the lower pressing portion  3022  of the lower mold  302  are directly pressed together after the molding die  300  performs a mold closing operation, and the molding space  303  is formed between the conductive portion  11  and the upper mold  301  and the lower mold  302 . 
     In this example, the adjacent conductive portions  11  are independent of each other, and each of the conductive portions  11  is independently placed in a preset position on the lower mold  302  and then injected with a fluid material after the mold is closed. 
     In other examples of the present disclosure, the upper surface of the conductive portion  11  is not a flat surface and has a recess in which the electronic component can be received to reduce the overall height of the assembled electronic component and the circuit board assembly  1 . Accordingly, the structure and shape of the molding die  300  may be adjusted accordingly. 
     In other embodiments of the present disclosure, adjacent conductive portions  11  are interconnected to facilitate placement of the conductive portions  11  in the molding die  300 . 
     With continued reference to  FIG. 2A , the fluid material is added to at least one of the molding spaces  303 , and the fluid material fills all of the molding spaces  303  by a transfer molding process or a press molding process to form the insulating portion  12 , so that the insulating portion  12  and the conductive portion  11  are integrally molded. 
     The fluid material may be a liquid, a solid, or a solid-liquid mixture, or the like, so that the fluid material may flow. The fluid material may be a thermoset material. Of course, it will be appreciated by those skilled in the art that the material of the fluid material is not limited thereto. 
     With continued reference to  FIG. 2A , the mold drawing operation may be performed by the molding die  300 , and the upper mold  301  may be drawn first, as shown in  FIG. 2A . 
     With continued reference to  FIG. 2B , the semi-finished product of the circuit board assembly is obtained after a mold drawing operation is performed by the molding die  300 . The semi-finished product of the circuit board assembly may be cut to obtain a single circuit board assembly  1 . 
     In other embodiments of the present disclosure, the junction of the adjacent conductive portions  11  is a complete metal block, that is, the second conductive portion  112  of one of the conductive portions  11  is in direct contact with the second conductive portion  112  of the adjacent one conductive portion  11 . In a subsequent cutting process, it is necessary to divide the metal block composed of two of the second conductive portions  112 . 
     More specifically, in some examples of the present disclosure, the insulating portion  12  of the circuit board assembly  1  can be observed at one end of the upper surface of the circuit board assembly  1  only between the first conductive portion  111  and the second conductive portion  112 . In the manufacturing process, the adjacent first conductive portions  111  is a complete metal plate, and the adjacent second conductive portion  112  is a complete metal plate. Even in some variant embodiments, the first conductive portion  111  of one conductive portion  11  and the second conductive portion  112  of the adjacent one conductive portion  11  are a complete metal plate. By subsequent cutting, the single conductive portion  11  and the circuit board assembly  1  with the single conductive portion  11  are obtained. 
     Further, in this example, in the lateral direction, the second conductive portions  112  of the adjacent conductive portions  11  are disposed adjacent to each other, and the first conductive portions  111  of the adjacent conductive portions  11  are disposed adjacent to each other. During the cutting process, a single circuit board assembly  1  may be obtained, or a plurality of circuit board assemblies  1  may be obtained to meet the needs of some arrayed electronic devices. 
     In other examples of the present disclosure, in the lateral direction, the first conductive portion  111  and the second conductive portion  112  of the adjacent conductive portions  11  are provided at intervals, that is, the first conductive portion  111  of one of the conductive portions  11  is adjacent to the second conductive portion  112  of the adjacent conductive portion  11 . 
     According to another aspect of the present disclosure, there is further provided a method of manufacturing a circuit board assembly  1  for supporting an electronic component, The method includes the steps of:
         (a) placing at least one conductive portion  11  into a molding die  300 ;   (b) performing a mold closing process by the molding mold  300  to form a molding space  303  between the conductive portion  11  and an upper mold  301  and a lower mold  302  of the molding die  300 ;   (c) adding a fluid material to the molding space  303  so that the fluid material fills the molding space  303  and solidifies within the molding space  303 ; and   (d) after a mold drawing process is performed by the molding die  300 , at least one insulating portion  12  integrally bonded to the circuit board assembly  1  is formed on the circuit board assembly  1 .       

     According to an embodiment of the invention, the step (d) further includes the steps of: 
     Performing a mold drawing process by the molding die  300  to form a semi-finished product of the circuit board assembly, which includes a plurality of conductive portions  11  and the insulating portions  12  integrally bonded to the conductive portions  11 ; and 
     Cutting the semi-finished product of the circuit board assembly to obtain the circuit board assembly  1 . 
     According to an embodiment of the present disclosure, in the above method, at least a part of the insulating portion  12  is located between the first conductive portion  111  and the second conductive portion  112  to separate the first conductive portion  111  and the second conductive portion  112 . 
     According to an embodiment of the present disclosure, in the above method, at least a part of the insulating portion  12  is formed on at least a part of the side surface of the conductive portion  11 . 
     According to art embodiment of the present disclosure, the step (d) is implemented as: after the mold drawing process is performed by the molding die, the insulating portion  12  integrally bonded to the conductive portion  11  and a bracket  20  integrally bonded to the insulating portion  12  are formed on the conductive portion  11 . 
     According to an embodiment of the present disclosure, in the above method, the insulating portion  12  integrally bonded to a side surface of the conductive portion  11  is formed on the conductive portion  11 . 
     According to an embodiment of the present disclosure, in the step (d), the insulating portion  12  integrally bonded to a side surface and an upper surface of the conductive portion  11  is formed on the conductive portion  11 . The upper surface of the conductive portion  11  is used to support the electronic component. 
     According to an embodiment of the present disclosure, in the step (d), the insulating portion  12  integrally bonded to a side surface and a lower surface of the conductive portion  11  is formed on the conductive portion  11 . 
     According to an embodiment of the present disclosure, the method further includes a step of reducing the thickness of the insulating portion  12  to expose the lower surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, the method further includes a step of reducing the thickness of the insulating portion  12  to expose the upper surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, the method further includes a step of reducing the thickness of the insulating portion  12  to expose the side surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, in the above method, the conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 , and at least part of the insulating layer  12  separates the first conductive portion  111  and the second conductive portion  112 . 
     According to an embodiment of the present disclosure, in the above method, each of the conductive portions  11  is independent of each other. 
     According to an embodiment of the present disclosure, in the above method, a conductive portion  11  is connected to an adjacent conductive portion  11 . 
     Further, it will be appreciated that in the present embodiment, the upper mold  301  corresponds to the upper surface of the conductive portion  11 , and the lower mold  302 . corresponds to the lower surface of the conductive portion  11 . That is, the conductive portion  11  is flip-loaded into the lower mold  302 . In other examples of the present disclosure, the conductive portion  11  may be directly loaded into the lower mold  302 , that is, the upper mold  301  corresponds to the lower surface of the conductive portion  11 , and the lower mold  302  corresponds to the upper surface of the conductive portion  11 . 
       FIG. 3  shows another embodiment of a semi-finished product of the circuit board assembly according to the present disclosure, and  FIGS. 2A and 2B  are taken as reference at the same time. 
     In this example, the semi-finished product of the circuit board assembly includes a plurality of the conductive portions  11  and the insulating portions  12  integrally bonded to the conductive portions  11 . 
     Note that, in this example, the conductive portions  11  are interconnected to facilitate rapid placement of the conductive portions  11  in the lower mold  302 . A plurality of the conductive portions  11  are connected to each other to form a frame, and when the conductive portions  11  need to be placed in the lower mold  302  for operation, the placement of the conductive portions  11  can be completed in one operation, thereby saving operation time and improving work efficiency. 
     The semi-finished product of the circuit board assembly further includes connecting members  13  connecting to each of the adjacent conductive portions  11 . Depending on the connection position, the connecting members  13  may be divided into first connecting members connected to the first conductive portion  111  of the adjacent conductive portion  11  and second connecting members connected to the second conductive portion  112  of the adjacent conductive portion  11 . 
     Specifically, the first conductive portion  111  of the conductive portion  11  is connected to the first conductive portion  111  of the adjacent conductive portion  11  through a first connecting member, and the second conductive portion  112  of the conductive portion  11  is connected to the second conductive portion  112  of the other conductive portion  11  through a second connecting member. There is no direct contact between the first conductive portion  111  and the second conductive portion  112  of the same conductive portion  11 . 
     Preferably, in the present example, the first conductive portion  111  and the second. conductive portion  112  have the same height so that the final circuit board assembly  1  has a flat surface. 
     The height of the first connecting member is set to be lower than the height of the first conductive portion  111 , and the height of the second connecting member is set to be lower than the height of the second conductive portion  112 . 
     The molding space  303  includes at least one transverse guide groove and at least one longitudinal guide groove. The transverse guide groove and the longitudinal guide groove are perpendicular to each other and communicates with each other for the flow of the fluid material therethrough to fill the entire molding die  300 . The first connecting member and the second connecting member span the transverse guide groove and the longitudinal guide groove, respectively. When the heights of the first connecting member and the second. connecting member are lower than that of the surrounding first conductive portion  111  and the second conductive portion  112 , respectively, the fluid material can pass directly through the gap between the molding die  300  and the first connecting member and the second connecting member, so that for the entire molding die  300 , a single one of the transverse guide grooves or a single one of the longitudinal guide grooves can be completely penetrated, and the entire process of injecting the fluid material can be completed by injecting from one side of the molding die  300 . 
     In some examples of the present disclosure, the heights of the first connecting member and the second connecting member are equal to the height of the conductive portion  11 , and the transverse guide groove and the longitudinal guide groove cannot be penetrated, so that the molding space  303  is divided into a single separate space. The injection of the fluid material can be performed in the upper and lower directions of the molding die  300  for the single separate space, so that the fluid material finally fills the entire molding space  303 . 
     Another embodiment of the circuit board assembly  1  according to the present disclosure is shown in  FIG. 4 . 
     The circuit board assembly  1  includes a circuit board  10 . The circuit board  10  includes a conductive portion  11  and an insulating portion  12 . The insulating portion  12  is integrally coupled to the conductive portion  11 . The conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 . The first conductive portion  111  is separated from the second conductive portion  112  by at least a portion of the insulating portion  12 . 
     The longitudinal section of the first conductive portion  111  is an inverted trapezoid. The first conductive portion  111  has an upper surface, a lower surface and a side surface, wherein an area of the upper surface is larger than an area of the lower surface, and the side surface is provided inclined inwardly. 
     The inclined side surface enables the first conductive portion ill to be better supported on the insulating portion  12  to facilitate the bonding strength between the first conductive portion  111  and the insulating portion  12 . 
     The circuit board  10  further includes at least a part of the connecting members  13 . The circuit board assembly  1  is obtained by cutting the semi-finished product of the circuit board assembly, so that a part of the connecting member  13  is left in a single circuit board assembly  1 , and the connecting member  13  is connected to the first conductive part  111  and the second conductive part  112 , respectively. 
     Further, in other examples of the present disclosure, the second conductive portion  112  may also be designed in a specific shape to facilitate the bond strength between the second conductive portion  112  and the insulating portion  12 . The second conductive portion  112  may be formed in a step-like structure on the side surface, or the second conductive portion  112  is designed in an inverted trapezoidal shape in a longitudinal section. 
     Another embodiment of the circuit board assembly  1  according to the present disclosure is shown with reference to  FIG. 5A , and with reference to  FIG. 3 . 
     The circuit board assembly  1  includes a circuit board  10 . The circuit board  10  includes a conductive portion  11  and an insulating portion  12 . The insulating portion  12  is integrally formed on the conductive portion  11 , and the conductive portion  11  extends through the insulating portion  12 . The conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 , and at least a portion of the insulating portion  12  is located between the first conductive portion  111  and the second conductive portion  112  and encloses the first conductive portion  111  and the second conductive portion  112 . 
     A part of the insulating portion  12  is supported on a part of the lower surface of the first conductive portion  111 . In other words, the part of the insulating portion  12  that is not located between the first conductive portion  111  and the second conductive portion  112  does not contribute to the increase in the area size of the entire circuit board assembly  1 . 
     The conductive portion  11  and the insulating portion  12  have the same height, and each of the conductive portion  11 , the insulating portion  12  and the circuit board assembly  1  has a cubic structure. It will be appreciated that the first conductive portion  111  and the second conductive portion  112  of the conductive portion  11  may be circular, triangular, or polygonal, and the foregoing description of shape does not limit the present disclosure. 
     Note that in this example, during the cutting process of the semi-finished product of the circuit board assembly, it is possible to cut along the circumference of the first conductive portion  111  and the second conductive portion  112  so that the connecting member  13  does not appear in the final circuit board assembly  1 . 
     Another embodiment of the circuit board assembly  1  according to the present disclosure is shown with reference to  FIG. 5B , and with reference to  FIG. 3 . 
     The circuit board assembly  1  includes a circuit board  10 . The circuit board  10  includes a conductive portion  11  and an insulating portion  12 . The insulating portion  12  is integrally molded to the conductive portion  11 , and the conductive portion  11  extends through the insulating portion  12 . 
     The insulating portion  12  includes an insulating body  121  and an insulating frame  122 . The insulating body  121  forms on the outer side of the conductive portion  11  and increases the size of the area of the circuit board assembly  1  in the horizontal direction. The insulating frame  122  is integrally formed with the insulating body  121 . The insulating body  121  contributes to increasing the size of the circuit board assembly  1  in the vertical direction. 
     The insulating frame  122  is formed on a side surface of the conductive portion  11 . In other words, the side surface of the conductive portion  11  is completely wrapped with an insulating material. 
     The conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 , and a portion of the insulating portion  12  is located between the first conductive portion  111  and the second conductive portion  112  and encloses the first conductive portion  111  and the second conductive portion  112 . A part of the insulating portion  12  is supported on the first conductive portion  111 . 
     An upper surface of the second conductive portion  112  is larger than a lower surface of the second conductive portion  112  to facilitate reduction of the contact area between the upper surface of the second conductive portion  112  and other circuit boards. 
     The circuit board assembly  1  further includes at least a part of the connecting members  13 . The connecting members  13  are connected to the side surface of the first conductive portion  111  and the second conductive portion  112 , respectively. 
     In other embodiments of the present disclosure, a part of the insulating body  121  is supported by the second conductive portion  112 . 
     Another embodiment of the semi-finished product of the circuit board assembly according to the present disclosure is shown with reference to  FIG. 5C , and with reference to  FIG. 3 . 
     Here, a single circuit board assembly  1  is illustrated, but in fact the semi-finished product of the circuit board assembly may include a plurality of circuit board assemblies  1 . 
     The circuit board assembly  1  includes a circuit board  10 . The circuit board  10  includes a conductive portion  11  and an insulating portion  12 . The insulating portion  12  is integrally molded to the conductive portion  11 . The conductive portion  11  includes an upper surface, a lower surface and a side surface, wherein the upper surface and the lower surface are oppositely disposed, and the side surface is connected to the upper surface and the lower surface and formed between the upper surface and the lower surface. 
     In this example, a part of the insulating portion  12  is wrapped around the upper surface of the conductive portion  11  so that the conductive portion  11  cannot penetrate through the insulating portion  12 . 
     The circuit board assembly  1  further includes at least a part of the connecting members  13 . The connecting members  13  are connected to the side surfaces of the first conductive portion  111  and the second conductive portion  112 , respectively. 
     Further, the manufacturing process of the semi-finished product of the circuit board assembly includes a step of: 
     Exposing the upper surface of the conductive portion  11  so that an electronic component can be communicated to the upper surface of the conductive portion  11 . 
     The insulating portion  12  located on the upper surface of the conductive portion  11  may be removed by a process such as grinding or cutting. 
     It will be appreciated that the semi-finished product of the circuit board assembly may be first cut into a single or a plurality of the circuit board assemblies  1  and then exposing the upper surface of the conductive portion  11  by grinding or cutting. Alternatively, the upper surface of the conductive portion  11  may be exposed by grinding or cutting, and then divided the semi-finished product of the circuit board assembly into a single or a plurality of the circuit board assemblies  1 . It will be appreciated that the upper surface of the insulating portion  12  can be completely removed so that the height is reduced to expose the upper surface of the conductive portion  11 . Alternatively, the position of the insulating portion  12  corresponding to the conductive portion  11  may be removed to form a groove for exposing the upper surface of the conductive portion  11 , and the groove may be used to prevent glue spill when the electronic component is mounted. 
     Another embodiment of the semi-finished product of the circuit board assembly according to the present disclosure is shown with reference to  FIG. 5D , and with reference to  FIG. 3 . 
     Here, a single circuit board assembly  1  is illustrated, but in fact the semi-finished product of the circuit board assembly may include a plurality of circuit board assemblies  1 . 
     The circuit board assembly  1  includes a circuit board  10 . The circuit board  10  includes a conductive portion  11  and an insulating portion  12 . The insulating portion  12  is integrally molded the conductive portion  11 . The conductive portion  11  includes an upper surface, a lower surface, and a side surface, wherein the upper surface and the lower surface are oppositely disposed, and the side surface is connected to the upper surface and the lower surface and formed between the upper surface and the lower surface. 
     In this example, a part of the insulating portion  12  is wrapped around the lower surface of the conductive portion  11  so that the conductive portion  11  cannot penetrate through the insulating portion  12 . 
     The circuit board assembly  1  further includes at least a part of the connecting members  13 . The connecting members  13  are connected to the side surfaces of the first conductive portion  111  and the second conductive portion  112 , respectively. 
     Further, the manufacturing process of the semi-finished product of the circuit board assembly includes a step of: 
     Exposing the lower surface of the conductive portion  11  so that an electronic component can be communicated to the lower surface of the conductive portion  11 . 
     The insulating portion  12  located on the lower surface of the conductive portion  11  may be removed by a process such as grinding or cutting. 
     It will be appreciated that the semi-finished product of the circuit board assembly may be first cut into a single or a plurality of the circuit board assemblies  1  and then exposing the lower surface of the conductive portion  11  by grinding or cutting. Alternatively, the lower surface of the conductive portion  11  may be exposed by grinding or cutting, and then divided the semi-finished product of the circuit board assembly into a single or a plurality of the circuit board assemblies  1 . 
     It will be appreciated that in some examples of the present disclosure, a portion of the insulating portion  12  is wrapped around the side surface of the conductive portion  11 , and the side surface of the conductive portion  11  may be exposed to the outside by cutting or grinding. 
       FIG. 6  shows an embodiment of a circuit board assembly  1  according to the invention. 
     The circuit board assembly  1  includes a circuit board  10  and a bracket  20 . The bracket  20  is integrally coupled to the circuit board  10  and the bracket  20  surrounds to form a light window  21 . The circuit board assembly  1  includes a conductive portion  11  and an insulating portion  12 , and the insulating portion  12  is integrally bonded to the conductive portion  11 . 
     The conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 . The first conductive portion  111  and the second conductive portion  112  are separated by a portion of the insulating portion  12 . The bracket  20  is integrally molded on a side surface of the conductive portion  11 . 
     In the present example, the insulating portion  12  and the bracket  20  are integrally coupled to the conductive portion  11 , and the insulating portion  12  and the bracket  20  are made of the same material. The bracket  20  on the outer side may protect the conductive portion  11 . The bracket  20  prevents dust and the like from falling on an electronic component on the upper surface of the conductive portion  11 , and may also prevent malfunctions, such as a short circuit, on the side surface of the circuit board assembly  1 . 
     In other examples of the present disclosure, the bracket  20  is connected to the conductive portion  11  of the circuit board assembly  1 . Alternatively, the bracket  20  is connected to the insulating portion  12  of the circuit board assembly  1 . Alternatively, the bracket  20  is connected to the conductive portion  11  and the insulating portion  12  of the circuit board assembly  1 . The bracket  20  may be connected by a connecting medium such as glue. 
     Referring to  FIG. 7 , an application of the circuit board assembly  1 , a TOF camera module  100 , according to the present disclosure is shown. 
     The TOF camera module  100  includes a floodlight  110  for generating a light ray to a subject to be photographed, the light ray being reflected by the subject, and a receiving unit  120  for receiving the reflected light ray and obtaining depth information of the subject to be photographed according to the information of the emitted light ray and the reflected light ray. 
     The receiving unit  120  includes a lens assembly  1201  for receiving light and a photosensitive circuit  1202  for receiving the light and converting the optical signal to an electrical signal based on a photoelectric conversion principle. 
     The lens assembly  1201  further includes an optical lens  12011  and a base  12012 , and the photosensitive circuit  1202  includes a photosensitive element  12021  and a circuit board  12022 . The optical lens  12011  and the floodlight  110  are respectively supported on the base  12012 . The photosensitive element  12021  is conductively connected to the circuit board  12022 . In this example, the base  12012  is integrally molded to the circuit board  12022 . The floodlight  110  is conductively connected to the base  12012 . 
     In the present embodiment, the electronic component is implemented as a light-emitting element  2 . The floodlight  110  includes the light-emitting element  2  and the circuit board assembly  1 . The light-emitting element  2  is supported by the circuit board assembly  1  and communicably connected to the circuit board assembly  1 . The circuit board assembly  1  provides a light-passing path, and the light-emitting element  2  can be excited to emit light outward through the light-passing path after being powered. 
     The circuit board assembly  1  includes a circuit board  10  and a bracket  20 . The bracket  20  is supported by the circuit board  10 . The bracket  20  has a light window  21 . The light-emitting element  2  cooperates with the bracket  20  to form the light window  21  so that light is emitted outwardly through the light window  21 . 
     The light-emitting element  2  has a front surface and a back surface. The front surface of the light-emitting element  2  is communicated with the second conductive portion  112  of the conductive portion  11  through a wire, and the back surface of the light-emitting element  2  is directly supported by the first conductive portion  111  of the conductive portion  11  and communicated with the conductive portion  11 . 
     The floodlight  110  further includes an optical auxiliary element  3 . The bracket  20  supports the optical auxiliary element  3  on the circuit board assembly  1  and the optical auxiliary element  3  is held in a light-passing path of the light-emitting element  2 . The optical auxiliary element  3  is used to change or improve the light emitted by the light-emitting element  2 , for example, to change the light emitted by the light-emitting element  2  in a refractive, diffractive and filter manner. The optical auxiliary element  3  may be a refractive lens or a diffractive lens. It will be appreciated by those skilled in the art that the above examples do not limit the type of the optical auxiliary element  3 . 
     The floodlight  110  further includes at least one electronic device  4 . The electronic device  4  is conductively connected to the circuit board assembly  1 . In this example, at least part of the electronic device  4  is disposed on the circuit board  12022  of the receiving unit  120  and is covered by the base  12012 . The electronic device  4  is conductively connected to the circuit board assembly  1 . Specifically, the electronic device  4  is conductively connected to the circuit board assembly  1  of the floodlight  110  through the circuit board  12022  of the receiving unit  120 . 
     Further, in some examples of the present disclosure, the light-emitting element  2  may be implemented as a Vertical-Cavity Surface-Emitting Laser (VCSEL). After energization, the Vertical-Cavity Surface-Emitting Laser can be energized to emit laser light. 
     It should be noted that the Vertical-Cavity Surface-Emitting Laser needs to be maintained at a certain temperature range to be able to operate normally, that is, the heat dissipation performance of the circuit board assembly  1  is important to the operating state of the Vertical-Cavity Surface-Emitting Laser. Since the first conductive portion  111  of the circuit board assembly  1  provides a large heat dissipation area, the Vertical-Cavity Surface-Emitting Laser can operate normally when supported on the first conductive portion  111 . 
     Further, a back surface of the Vertical-Cavity Surface-Emitting Laser is a negative electrode, and a front surface of the Vertical-Cavity Surface-Emitting Laser is a positive electrode. When the Vertical-Cavity Surface-Emitting Laser is respectively communicated with the first conductive portion  111  and the second conductive portion  112 , the first conductive portion  111  is a negative electrode, and the second conductive portion  112  is a positive electrode. 
       FIGS. 8A and 8B  show a manufacturing process of the circuit board assembly  1  according to the present disclosure. 
     At the stage shown in  FIG. 8A , at least one conductive portion  11  is attached to a molding die  300  to perform a molding process by the molding die. 
     Specifically, the molding die  300  includes an upper mold  301  and a lower mold  302 . At least one of the upper mold  301  and the lower mold  302  can be operated to enable the molding die  300  to be subjected to mold closing and drawing operations. For example, in one embodiment of the present disclosure, a molding space  303  is formed between the upper mold  301  and the lower mold  302  after the conductive portion  11  is placed in the lower mold  302  and the upper mold  301  is subjected to a mold closing operation. That is, the lower mold  302  and the upper mold  301  communicate with each other after performing a mold closing operation. The upper mold  301 , the lower mold  302  and the conductive portion  11  define the molding space  303 . A fluid material can fill the molding space  303  to form the insulating portion  12  integrally bonded to the conductive portion  11 . 
     With continued reference to  FIG. 8A , the upper mold  301  further includes an upper molding portion  3011  and an upper pressing portion  3012 . The upper pressing portion  3012  is provided at the periphery of the upper molding portion  3011  so that the upper pressing portion  3012  of the upper mold  301  can be pressed against an upper surface of the upper mold  301  after the molding die  300  is subjected to a mold closing process. 
     The upper molding portion  3011  has a lower surface. When the molding die  300  is subjected to a mold closing process, a part of the lower surface of the upper molding portion  3011  is pressed against the conductive portion  11 , and the part of the lower surface of the upper molding portion  3011  and an upper surface of a corresponding part of the lower mold  302  form the molding space  303  for passage of the fluid material. 
     In this example, since the upper and lower surfaces of the circuit board assembly  1  are flat, the corresponding lower surface of the upper molding portion  3011  and the corresponding upper surface of the lower molding portion  3021  are flat. The structure of the entire molding die  300  is simple, and the manufacturing difficulty and the manufacturing cost are low. 
     Further, the upper molding portion  3011  includes at least one conductive portion pressing portion  30111  and at least one insulating position molding portion  30112 . The conductive portion pressing portion  30111  integrally extending to the insulating position molding portion  30112 . The conductive portion pressing portion  30111  further includes a first conductive portion pressing portion  301111  and a second conductive portion pressing portion  301112 . One of the insulating position molding portions  30112  is located between the first conductive portion pressing portion  301111  and an adjacent first conductive portion pressing portion  301111 , one of the insulating position molding portions  30112  is located between the first conductive portion pressing portion  301111  and an adjacent second conductive portion pressing portion  301112 , and one of the insulating position molding portions  30112  is located between the second conductive portion pressing portion  301112  and an adjacent second conductive portion pressing portion  301112 . 
     The lower mold  302  includes a lower molding portion  3021  and a lower pressing portion  3022  provided at a peripheral position of the lower molding portion  3021  so that the lower pressing portion  3022  of the lower mold  302  can support the upper pressing portion  3012  of the upper mold  301  when the molding die  300  is subjected to a mold closing process. 
     The lower mold  302  further includes a lower molding guide groove  3023  formed between the lower pressing portion  3022  and the lower molding portion  3021  or between the lower molding portion  3021  and an adjacent lower molding portion  3021 . 
     The lower molding portion  3021  includes at least one supporting portion  30211  and at least one lower molding guide portion  30212 . The supporting portion  30211  and the lower molding guide portion  30212  are provided at intervals. The supporting portion  30211  corresponds to the lower surface of the conductive portion  11 , and the lower molding guide portion  30212  corresponds to the insulating position molding portion  30112  and the lower molding guide groove  3023 . The molding space  303  is formed between the insulating position molding portion  30112  and the lower molding guide portion  30212  and the lower molding guide groove  3023  to form the insulating portion  12  and the bracket  20  integrally bonded to the conductive portion  11  in a subsequent step. 
     Further, the supporting portion  30211  includes a first conductive portion supporting portion  302111  and a second conductive portion supporting portion  302112 . Alternatively, when the number of the conductive portions  11  is a plurality, at least one lower molding guide portion  30212  is located between the first conductive portion supporting portion  302111  and an adjacent second conductive portion supporting portion  302112 , at least one lower molding guide portion  30212  is located between the first conductive portion supporting portion  302111  and an adjacent first conductive portion supporting portion  302111 , and at least one lower molding guide portion  30212  is located between the second conductive portion supporting portion  302112  and an adjacent second conductive portion supporting portion  302112 . 
     When a mold closing operation is performed by the molding die  300 , the distance between the conductive portion pressing portion  30111  of the upper molding portion  3011  of the upper mold  301  and the supporting portion  30211  of the lower molding portion  3021  of the lower mold  302  is set to exactly accommodate the conductive portion  11 , so as to avoid contamination of the upper surface of the conductive portion  11  by the fluid material. 
     In this example, the insulating portion  12  integrally formed on the conductive portion  11  can not only separate the first conductive portion  111  from the second conductive portion  112 , but also cover the side surface of the conductive portion  11 . In other embodiments of the present disclosure, the insulating portion  12  integrally molded to the conductive portion  11  separates the first conductive portion  111  and the second conductive portion  112 , and covers a portion of the side surface of the conductive portion  11 . In other embodiments of the present disclosure, the insulating portion  12  integrally molded to the conductive portion  11  is formed only on the first conductive portion  111  and the second conductive portion  112  of the conductive portion  11 . 
     Further, the molding die  300  may further include at least one film layer  304 . For example, in this particular example of the present disclosure, the number of film layers  304  may be implemented as two, wherein one of the film layers  304  is disposed on the lower surface of the upper mold  301  and the one film layer  304  and the lower surface of the upper mold  301  overlap each other, and the other one of the film layers  304  is disposed on the inner surface of the lower mold  302  and the other one film layer  304  and the upper surface of the lower mold  302  overlap each other. The film layer  304  may be attached to the lower surface of the upper mold  301  such that the film layer  304  and the inner surface of the upper mold  301  are connected to each other in an overlapping manner, and the film layer  304  may be attached to the upper surface of the lower mold  302  such that the film layer  304  and the upper surface of the lower mold  302 . are connected to each other in an overlapping manner. 
     The film layer  304  can act as a buffer to reduce damage, such as scratches, to the conductive portion  11  during production. 
     When the molding die  300  is subjected to a mold closing operation, the film layers  304  are held between the conductive portion  11  and the conductive portion pressing portion  30111  of the upper molding portion  3011  of the upper mold  301 , and between the conductive portion  11  and the supporting portion  30211  of the lower molding portion  3021  of the lower mold  302 , respectively, so that the film layers  304  prevent a gap from being formed between the upper and lower molds  301  and  302  and the conductive portion  11  by deforming during compression, whereby the fluid material is prevented from entering the upper surface and the lower surface of the conductive portion  11  in a subsequent molding process. Therefore, both the upper and lower sides of the circuit board assembly  1  that is finally formed can be directly conducted through the conductive portion  11 , thereby avoiding contamination of the conductive portion  11 , particularly the upper surface of the conductive portion  11 , to ensure product yield of the circuit board assembly  1 . 
     The upper pressing portion  3012  of the upper mold  301  and the lower pressing portion  3022  of the lower mold  302  are directly pressed together after the molding die  300  performs a mold closing operation, and the molding space  303  is formed between the conductive portion  11  and the upper and lower molds  301  and  302 . 
     Preferably, in the present example, the first conductive portion  111  and the second conductive portion  112  have the same height so that the final circuit board assembly  1  has a flat surface. 
     The molding space  303  includes at least one transverse guide groove and at least one longitudinal guide groove. The transverse guide groove and the longitudinal guide groove are perpendicular to each other and communicates with each other for the flow of the fluid material therethrough to fill the entire molding die  300 . For the entire molding die  300 , a single one of the transverse guide grooves or a single one of the longitudinal guide grooves can be completely penetrated, so that the entire process of injecting the fluid material can be completed by injection from one side of the molding die  300 . 
     With continued reference to  FIG. 8A , the fluid material is added to at least one of the molding spaces  303 , and the fluid material fills all of the molding spaces  303  by a transfer molding process or a press molding process to form the insulating portion  12 , so that the insulating portion  12  and the conductive portion  11  are integrally molded. 
     The fluid material may be a liquid, a solid, or a solid-liquid mixture, or the like, so that the fluid material may be flow. The fluid material may be a thermoset material. Of course, it will be appreciated by those skilled in the art that the material of the fluid material is not limited thereto. 
     With continued reference to  FIG. 8A , the mold drawing operation may be performed by the molding mold  300 , and the upper mold  301  may be drawn first, as shown in  FIG. 8A . 
     With continued reference to  FIG. 8B , the semi-finished product of the circuit board assembly is obtained after a mold drawing operation is performed by the molding die  300 . The semi-finished product of the circuit board assembly may be cut to obtain a single circuit board assembly  1 . 
     Further, in this example, in the lateral direction, the second conductive portions  112  of the adjacent conductive portion  11  are disposed adjacent to each other, and the first conductive portions  111  of the adjacent conductive portion  11  are disposed adjacent to each other. During the cutting process, a single circuit board assembly  1  may be obtained, or a plurality of circuit board assemblies  1  may be obtained to meet the needs of some arrayed electronic devices. 
     In other examples of the present disclosure, in the lateral direction, the first conductive portion  111  and the second conductive portion  112  of the adjacent conductive portions  11  are provided at intervals, that is, the first conductive portion  111  of one of the conductive portions  11  is adjacent to the second conductive portion  112  of the adjacent conductive portion  11 . 
     It will be appreciated that the upper end of the bracket  20  is formed at a position corresponding to the lower molding guide groove  3023  of the lower mold  302 . The shape of the lower molding guide groove  3023  determines the shape of the bracket  20 . 
     The bracket  20  has a high end and a low end. The low end is connected to the circuit board assembly  1 , and the high end can be used to support an optical auxiliary element  3 . The high end of the bracket  20  may be of an inclined structure to facilitate stable support of the optical auxiliary element  3 . The optical auxiliary element  3  has a side surface, and the side surface is arranged to be inclined inwardly from top to bottom. 
     According to another aspect of the present disclosure, there is provided a method of manufacturing a circuit board assembly  1 . The manufacturing method includes the steps of:
         (a) placing at least one conductive portion  11  into a molding die  300 ;   (b) performing a mold closing process by the molding mold  300  to form a molding space  303  between the conductive portion  11  and an upper mold  301  and a lower mold  302  of the molding die  300 ;   (c) adding a fluid material to the molding space  303  so that the fluid material fills the molding space  303  and solidifies within the molding space  303 ; and   (d) after a mold drawing process is performed by the molding die  300 , at least one insulating portion  12  and at least one bracket  20  integrally bonded to the circuit board assembly  1  is formed on the circuit board assembly  1 .       

     According to an embodiment of the present disclosure, the conductive portion  11  is formed by an etching process, and a side surface of the conductive portion  11  is provided inclined inwardly. 
     According to an embodiment of the invention, the step (d) further includes the steps of: 
     Performing a mold drawing process by the molding die  300  to form a semi-finished product of the circuit board assembly, which includes a plurality of conductive portions  11  and the insulating portions  12  and the bracket  20  integrally bonded to the conductive portions  11 ; and 
     Cutting the semi-finished product of the circuit board assembly to obtain the circuit board assembly  1 . 
     According to an embodiment of the present disclosure, the bracket  20  is integrally bonded to a side surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, the bracket  20  is integrally bonded to a side surface of the insulating portion  12 . 
     According to an embodiment of the present disclosure, in the above method, at least a part of the insulating portion  12  is located between the first conductive portion  111  and the second conductive portion  112  to separate the first conductive portion  111  and the second conductive portion  112 . 
     According to an embodiment of the present disclosure, in the above method, at least a part of the insulating portion  12  is formed on at least a part of the side surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, the step (d) is implemented as: after the mold drawing process is performed by the molding die  300 , the insulating portion  12  integrally bonded to the conductive portion  11  and a bracket  20  integrally bonded to the insulating portion  12  are formed on the conductive portion  11 . 
     According to an embodiment of the present disclosure, in the above method, the insulating portion  12  integrally bonded to a side surface of the conductive portion  11  is formed. 
     According to an embodiment of the present disclosure, in the step (d), the insulating portion  12  integrally bonded to a side surface and an upper surface of the conductive portion  11  is formed on the conductive portion  11 . The upper surface of the conductive portion  11  is used to support the electronic component. 
     According to an embodiment of the present disclosure, in the step (d), the insulating portion  12  integrally bonded to a side surface and a lower surface of the conductive portion  11  is formed on the conductive portion  11 . 
     According to an embodiment of the present disclosure, the method further includes a step of reducing the thickness of the insulating portion  12  to expose the lower surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, the method further includes a step of reducing the thickness of the insulating portion  12  to expose the upper surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, the method further includes a step of reducing the thickness of the insulating portion  12  to expose the side surface of the conductive portion  11 . 
     According to an embodiment of the present disclosure, in the above method, the conductive portion  11  includes a first conductive portion  111  and a second conductive portion  112 , and at least part of the insulating layer separates the first conductive portion  111  and the second conductive portion  112 . 
     According to an embodiment of the present disclosure, in the above method, each of the conductive portions  11  is independent of each other. 
     According to an embodiment of the present disclosure, in the above method, a conductive portion  11  is connected to an adjacent conductive portion  11 . 
     According to another aspect of the present disclosure, there is provided a method of manufacturing a semi-finished product of the circuit board assembly. The manufacturing method includes the steps of:
         (a) placing a plurality of conductive portions  11  into a molding die  300 ;   (b) performing a mold closing process by the molding die  300  to form a molding space  303  between the conductive portion  11  and an upper mold  301  and a lower mold  302  of the molding die  300 ;   (c) adding a fluid material having an insulating property to the molding space  303  so that the fluid material fills the molding space  303  and solidifies within the molding space  303 ; and   (d) after a mold drawing process is performed by the molding die  300 , an insulating portion  12  integrally bonded to the conductive portion  11  is formed on each of the conductive portions  11  to obtain a semi-finished product of the circuit board assembly.       

     It will be appreciated that the plurality of the conductive portions  11  may be a conductive tile. In such a way, the placement of the conductive portions  11  in one molding die  300  can be completed at one time, so as to save processes and improve work efficiency. 
     According to some embodiments of the present disclosure, in the above method, each of the conductive portions  11  is connected to an adjacent conductive portion  11 . 
     According to some embodiments of the present disclosure, in the above method, the conductive portion  11  includes a first conductive portion III and a second conductive portion  112 . The insulating portion  12  is integrally molded to the first conductive portion  111  and the second conductive portion  112 , and the first conductive portion  111  and the second conductive portion  112  are separated by at least part of the insulating portion  12 . 
     According to some embodiments of the present disclosure, the first conductive portion  111  of one of the conductive portions  11  is connected to the first conductive portion  111  of an adjacent one of the conductive portions  11 . 
     According to some embodiments of the present disclosure, the second conductive portion  112  of one of the conductive portions  11  is connected to the second conductive portion  112  of an adjacent one of the conductive portions  11 . 
     According to some embodiments of the present disclosure, the first conductive portion  111  of one of the conductive portions  11  is connected to the second conductive portion  112  of an adjacent one of the conductive portions  11 . 
     According to some embodiments of the present disclosure, in the above process, the method further includes a step of: 
     Etching a copper plate to form a plurality of the conductive portions  11 . 
     Referring to  FIG. 9 , another embodiment of the TOF camera module  100  according to the present disclosure is shown. 
     The TOF camera module  100  includes the floodlight  110  for generating a light ray to a subject to be photographed, the light ray being reflected by the subject, and the receiving unit  120  for receiving the reflected light ray and obtaining depth information of the subject to be photographed according to the information of the emitted light ray and the reflected light ray. 
     The receiving unit  120  includes the lens assembly  1201  for receiving light and the photosensitive circuit  1202  for receiving the light and converting the optical signal to an electrical signal based on a photoelectric conversion principle. The lens assembly  1201  further includes the optical lens  12011  and the base  12012 , and the photosensitive circuit  1202  includes the photosensitive element  12021  and the circuit board  12022 . The optical lens  12011  and the floodlight  110  are supported on the base  12012 , respectively, and the photosensitive element  12021  is conductively connected to the circuit board  12022 . In this example, the base  12012  is integrally molded to the circuit board  12022 . The floodlight  110  is conductively connected to the base  12012 . 
     The circuit board assembly  1  includes the conductive portion  11  and the insulating portion  12 . The conductive portion  11  includes the first conductive portion  111  and the second conductive portion  112 , and the first conductive portion  111  and the second conductive portion  112  are separated by the insulating portion  12  to avoid direct contact between the first conductive portion  111  and the second conductive portion  112 . 
     The conductive portion  11  further includes a third conductive portion  113  surrounded by the insulating portion  12  to be separated from the other conductive portion  11 , and a fourth conductive portion  114  surrounded by the insulating portion  12  to be separated from the other conductive portion  11 . Further, the third conductive portion  113  extends in the insulating portion  12 , for example, extends through the insulating portion  12 . Other electronic components may be placed on the third conductive portion  113  to be conductive through the third conductive portion  113 . 
     The electronic component may be placed on the first conductive portion  111 . In this embodiment, the electronic component is implemented as a light-emitting element  2 . The floodlight  110  includes the light-emitting element  2  and the circuit board assembly  1 . The light-emitting element  2  is supported on the circuit board assembly  1  and communicably connected to the circuit board assembly  1 . The circuit board assembly  1  provides a light-passing path, and the light-emitting element  2  can be excited to emit light outward through the light-passing path after being powered. 
     The light-emitting element  2  has a front surface and a back surface. The front surface of the light-emitting element  2  is communicated with the second conductive portion  112  of the conductive portion  11  through a wire, and the back surface of the light-emitting element  2  is directly supported by the conductive portion  11  and communicated with the conductive portion  11 . 
     The floodlight  110  further includes at least one electronic device  4 . The electronic device  4  is conductively connected to the circuit board assembly  1 . In this example, at least part of the electronic device  4  is disposed on the circuit board  12022  of the receiving unit  120  and is covered by the base  12012 . The electronic device  4  is conductively connected to the circuit board assembly  1 . Specifically, the electronic device  4  is conductively connected to the circuit board assembly  1  of the floodlight  110  through the circuit board  12022  of the receiving unit  120 . 
     In some examples of the present disclosure, the light-emitting element  2  may be implemented as a Vertical-Cavity Surface-Emitting Laser (VCSEL). After energization, the Vertical-Cavity Surface-Emitting Laser can be energized to emit laser light. 
     It should be noted that the Vertical-Cavity Surface-Emitting Laser needs to be maintained at a certain temperature range to be able to operate normally, that is, the heat dissipation performance of the circuit board assembly  1  is important to the operating state of the Vertical-Cavity Surface-Emitting Laser. Since the first conductive portion  111  of the circuit board assembly  1  provides a large heat dissipation area, the Vertical-Cavity Surface-Emitting Laser can operate normally when supported on the first conductive portion  111 . 
     Further, a back surface of the Vertical-Cavity Surface-Emitting Laser is a negative electrode, and a front surface of the Vertical-Cavity Surface-Emitting Laser is a positive electrode. When the Vertical-Cavity Surface-Emitting Laser is respectively communicated with the first conductive portion  111  and the second conductive portion  112 , the first conductive portion  111  is a negative electrode, and the second conductive portion  112  is a positive electrode. 
     According to another aspect of the present disclosure, a heat dissipation method of a circuit board assembly  1  includes the steps of: 
     Directing heat generated by the electronic component to be transferred from the back surface of the electronic component to the upper surface of the first conductive portion  111 ; 
     Conducting heat to the lower surface of the first conductive portion  111 ; and 
     Dissipating heat outwards. 
     According to some embodiments of the present disclosure, the electronic element is a light-emitting element  2 . 
     According to some embodiments of the present disclosure, the front surface of the electronic component is conductively connected to the second conductive portion  112 . 
     According to another aspect of the present disclosure, there is provided an electronic device  1000  which includes an electronic device body  200  and a main circuit board. The main circuit board is disposed on the electronic device body  200  and conductively connected to the electronic device body  200 . 
     The electronic device  1000  further includes a floodlight  110  with a flexible circuit board, and the floodlight  110  can be conductively mounted on the main circuit board of the electronic device. 
     In other examples of the present disclosure, the electronic device  1000  further includes a floodlight  110 , and the floodlight  110  is conductively mounted on the main circuit board of the electronic device  1000 . Specifically, the circuit board assembly of the floodlight  110  can be conductively connected to the main circuit board of the electronic device  1000 . 
     It will be appreciated that the floodlight  110  and the receiving unit  120  may be simultaneously mounted in an electronic device body  200 . The floodlight  110  and the receiving unit  120  may be integrally formed by an assembly. 
       FIG. 10A  illustrates an embodiment of a floodlight  110 A according to the present disclosure. Specifically, according to another aspect of the present disclosure, there is provided a floodlight  110 A having a flexible circuit board  5 A. The floodlight  110 A can be mounted to a receiving unit  120 A to form a TOF camera module  100 A. 
     The floodlight  110 A includes a flexible circuit board  5 A, at least one electronic device  4 A, a bracket  20 A, a light-emitting element  2 A, and a circuit board assembly  1 A manufactured according to the above manufacturing method. The bracket  20 A forms a light window  21 A. The light-emitting element  2 A is conductively supported on the circuit board assembly  1 A by the circuit board assembly  1 A. The flexible circuit board  5 A is conductively connected to the circuit board assembly  1 A. The electronic device  4 A is conductively connected to the circuit board assembly  1 A and the light-emitting element  2 A. The floodlight  110 A may further include an optical auxiliary element  3 A, and the optical auxiliary element  3 A is supported on the bracket  20 A. The light emitted from the light-emitting element  2 A is emitted outwardly by the optical auxiliary element  3 A. The flexible circuit board  5 A may be conductively connected to the circuit board assembly  1 A by means of conductive adhesive, or may be conductively connected to the circuit board assembly  1 A by means of a card slot. 
     The circuit board assembly  1 A includes a circuit board  10 A and the bracket  20 A. The bracket  20 A is connected to the circuit board  10 A. The circuit board  10 A includes a conductive portion  11 A and an insulating portion  12 A. The insulating portion  12 A is integrally molded to the conductive portion  11 A. The conductive portion  11 A includes a first conductive portion  111 A and a second conductive portion  112 A, and the first conductive portion  111 A and the second conductive portion  112 A are separated by the insulating portion  12 A. The light-emitting element  2 A is conductively supported on the first conductive portion  111 A. 
     The receiving unit  120 A includes a lens assembly  1201 A and a photosensitive circuit  1202 A. The photosensitive circuit  1202 A includes a photosensitive element  12021 A and a first circuit board  12022 A. The lens assembly  1201 A provides a light path for light to reach the photosensitive element  12021 A for photoelectric conversion. The photosensitive element  12021 A is conductively connected to the first circuit board  12022 A. In this example, at least part of the electronic components  4 A of the floodlight  110 A are disposed on the first circuit board  12022 A of the receiving unit  120 A to facilitate reduction in size of the floodlight  110 A. 
     The floodlight  110 A with the flexible circuit board  5 A can be mounted to the receiving unit  120 A through the flexible circuit board  5 A. The first circuit board  12022 A of the receiving unit  120 A is conductively connected to the flexible circuit board  5 A. 
     Referring to  FIG. 10B , according to another aspect of the present disclosure, there is provided a floodlight  110 B which can be mounted to a receiving unit  120 B having a flexible circuit board to form a TOF camera module  100 B. 
     The floodlight  110 B includes a flexible circuit board  5 B, at least one electronic component  4 B, a bracket  20 B, a light-emitting element  2 B, and a circuit board assembly  1 B manufactured according to the above manufacturing method. The bracket  20 B forms a light window  21 B. The light-emitting element  2 B is conductively connected to the circuit board assembly  1 B and supported on the circuit board assembly  18 . The electronic device  4 B is conductively connected to the circuit board assembly  1 B and the light-emitting element  2 B. The floodlight  110 B may further include an optical auxiliary element  3 B, and the optical auxiliary element  3 B is supported on the bracket  20 B. The light emitted from the light-emitting element  2 B is emitted outwardly by the optical auxiliary element  3 B. 
     The circuit, board assembly  1 B includes a circuit board  10 B and the bracket  20 B. The bracket  20 B is connected to the circuit board  10 B. The circuit board  10 B includes a conductive portion  11 B and an insulating portion  12 B. The insulating portion  12 B is integrally molded to the conductive portion  11 B. The conductive portion  11 B includes a first conductive portion  111 B and a second conductive portion  112 B, and the first conductive portion  111 B and the second conductive portion  112 B are separated by the insulating portion  12 B. The light-emitting element  2 B is conductively supported on the first conductive portion  111 B. 
     The receiving unit  120 B includes a lens assembly  1201 B and a photosensitive assembly  1202 B. The photosensitive assembly  1202 B further includes a photosensitive element  12021 B and a first circuit board  12022 B. The lens assembly  1201 B provides a light path for light to reach the photosensitive element  12021 B for photoelectric conversion. The photosensitive element  12021 B is conductively connected to the first circuit board  12022 B. The flexible circuit board  5 B is conductively connected to the first circuit board  12022 B. It will be appreciated that the flexible circuit board  5 B may be connected to the first circuit board  12022 B of the receiving unit  120 B by a conductive adhesive, and the flexible circuit board  5 B may also be connected to the first circuit board  12022 B of the receiving unit  120 B by a card slot. In this example, at least part of the electronic components  4 B of the floodlight  110 B are disposed on the first circuit board  12022 B of the receiving unit  120 B to facilitate reduction of the size of the floodlight  110 B. 
     The floodlight  110 B is assembled to the receiving unit by being conductively connected to the flexible circuit board  5 B of the receiving unit  120 B, thereby forming the TOF camera module  100 B. 
     It will be appreciated by those skilled in the art that the above description and the embodiments of the disclosure shown in the accompanying drawings are by way of example only and do not limit the disclosure. The objects of the present disclosure have been fully and efficiently achieved. The functional and structural principles of the present disclosure have been shown and described in embodiments, and without departing from the principles, embodiments of the present disclosure may be varied or modified in any manner.