Patent Description:
With the development of electronic products towards multifunction and portability, embedded chip packaging becomes a hot research topic in the field of electronic component packaging technologies. In an existing embedded chip package substrate, a land grid array (land grid array, LGA) is generally used to fasten a packaged component and a circuit board. However, because the land grid array is a type of surface-mount packaging, the packaged component and the circuit board are soldered through surface contact, soldering reliability is relatively poor, and a solder joint is easily broken, thereby affecting reliability of the packaged component. The document <CIT> shows a semi-conductor package comprising pins for mounting. The document <CIT> shows a lead pin for a package substrate, and an according semi-conductor package printed circuit board including the LED pin.

This invention provides an electronic component according to claim <NUM>.

In some possible implementations, there are a plurality of pins, and the plurality of pins are disposed at intervals. It may be understood that the pins use conducting materials, and insulating materials are spaced between the plurality of pins. In some embodiments, the part that is of the pin and that is embedded in the first circuit layer and the part that is of the pin and that protrudes from the first circuit layer may be integrally formed, or may be formed in steps. This application does not limit a technology for forming the pin in the electronic component package body, which may be an etching technology or a laser soldering technology. A person skilled in the art can design the technology based on an actual requirement.

A material used for the first part is the same as a main material used for the second part. For example, main materials used for the first part and the second part may be, but are not limited to, copper, aluminum, or gold. It may be understood that the material used for the first part that is of the pin and that is embedded in the first circuit layer is not remelted in a soldering process, to ensure reliability of a circuit of the electronic component package body. The material used for the first part is the same as the main material used for the second part. That is, neither the first part nor the second part of the pin is remelted.

In this embodiment, the main materials used for the first part and the second part of the pin are different from a material used for the solder joint. The first part and the second part of the pin are not remelted in a process of soldering the electronic component package body to the circuit board, and shapes of the first part and the second part are substantially unchanged, to improve soldering reliability of an electronic device. However, in a conventional technology, when soldering between the electronic component package body and the circuit board is implemented by using a ball grid array (ball grid array, BGA), a solder ball is remelted and deformed in the soldering process.

In some possible implementations, a side surface of at least one of the pins includes an inclined surface. For example, the second part of the pin may be a trapezoidal body or a truncated pyramid.

In this embodiment, the side surface of the second part includes an inclined surface, and a cross-sectional shape of the second part may be a trapezoid, so that on a basis that a height of the second part is the same, a surface area of the side surface of the second part is enlarged to further increase the soldering area of the pin, thereby improving reliability of soldering between the electronic component package body and the circuit board.

In some possible implementations, a side surface of at least one of the pins includes a stepped surface. For example, the second part of the pin may be a stepped structure. In this embodiment, a cross-sectional shape of the second part of the pin may be a stepped shape, so that a surface area of the side surface of the second part is enlarged to further increase the soldering area of the pin, thereby improving reliability of soldering between the electronic component package body and the circuit board. A specific shape of the second part of the pin is not limited in this embodiment of this application. A person skilled in the art can design the specific shape based on an actual requirement.

In some possible implementations, a second part of at least one of the pins includes a curved surface. For example, the second part of the pin is a circular truncated cone. In this embodiment, a side surface of the pin is a curved surface. In this embodiment, the second part is a circular truncated cone, so that on a basis that a height of the second part is the same, a surface area of the side surface of the second part is enlarged to further increase the soldering area of the pin, thereby improving reliability of soldering between the electronic component package body and the circuit board.

In some possible implementations, an area of the bottom surface is greater than an area of a cross section that is of the pin and that is along a surface of the substrate. That is, the area of the bottom surface is greater than an area of a cross section that is of the pin and that is along the second surface.

In this embodiment, the area of the bottom surface of the pin is greater than the area of the cross section that is of the pin and that is along the second surface, so that after the electronic component package body is soldered to the circuit board, the solder joint and the pin may form an interlocking force in a vertical direction, to further improve strength of the solder joint in a thickness direction of the electronic component package body, thereby avoiding a failure of the solder joint caused by long-term vibration of the electronic component, and improving reliability of the electronic device.

In some possible implementations, the solder joint includes a first segment and a second segment connected to the first segment. The first segment is located between the bottom surface of the pin and the circuit board, and the second segment is disposed around the side surface of the pin. A projection of the second segment on the circuit board partially overlaps a projection of the bottom surface of the pin on the circuit board. It may be understood that, after the electronic component package body is soldered to the circuit board, the solder joint that connects the electronic component package body and the circuit board in the electronic device forms an interlocking structure with the pin.

In this embodiment, the area of the bottom surface of the pin is greater than the area of the cross section that is of the pin and that is along the second surface, so that the solder joint and the pin may form an interlocking force in a vertical direction, to further improve strength of the solder joint in a thickness direction of the electronic component package body, thereby avoiding a failure of the solder joint caused by long-term vibration of the electronic component, and improving reliability of the electronic device.

In some possible implementations, the material used for the solder joint includes tin, and the main material used for the second part is different from the material used for the solder joint. It may be understood that the material used for the solder joint includes tin, and in a process of soldering the electronic component package body to the circuit board, the solder joint is remelted to wrap the second part, thereby effectively soldering the electronic component package body to the circuit board.

In this embodiment, the material used for the solder joint includes tin, and the material used for the solder joint is different from the main material used for the second part, so that the second part is not remelted in a process of soldering the electronic component package body to the circuit board. That is, a shape of the second part is substantially unchanged in the soldering process, so that the solder joint effectively surrounds the second part, thereby improving reliability of soldering between the electronic component package body and the circuit board.

In the invention, a groove is disposed on a side that is of at least one of the pins and that is away from the substrate. That is, a groove is disposed on a side that is of the pin and that faces the circuit board. The groove is recessed from a bottom surface of the pin to a side of the substrate. A partial structure of the solder joint is embedded in the groove. For example, there are a plurality of grooves. A second part of at least one of the pins includes a plurality of sub-pins. The plurality of sub-pins are disposed at intervals, and the plurality of sub-pins are all connected to a first part. Second parts of some pins of the plurality of pins include a plurality of sub-pins that are disposed at intervals. The grooves divide the second part into a plurality of sub-pins that are disposed at intervals. For example, the plurality of sub-pins are symmetrically arranged. The plurality of sub-pins are arranged in a matrix form. A gap between any two adjacent sub-pins is less than a gap between any two adjacent pins.

In the invention, a groove is disposed on a side that is of a single pin and that is away from the substrate, thereby increasing an exposed surface area of the single pin. A partial structure of the solder joint is embedded in the groove, thereby further increasing a soldering area of the single pin. The groove may be filled with solder when the electronic component package body is soldered, thereby further improving reliability of soldering between the electronic component package body and the circuit board. A width, a depth, a quantity, or the like of any groove is not limited in this application. A person skilled in the art can design a size of the groove based on an actual requirement or a machine requirement. For example, in a method for preparing the electronic component package body, a second part of a single pin may be segmented, to divide the second part of the single pin into a plurality of sub-pins that are disposed at intervals. A segmentation method may be, but is not limited to, etching or a laser.

In some possible implementations, the electronic component package body has a first side surface and a second side surface that are disposed opposite to each other. The second surface is connected between the first side surface and the second side surface, and the plurality of pins include a first pin and a second pin. The first pin is closest to the first side surface, the second pin is closest to the second side surface, and grooves are disposed on sides that are of the first pin and the second pin and that are away from the substrate.

In this embodiment, a possibility of a fatigue failure caused by vibration of the electronic device is relatively high for a pin at an edge of the electronic component package body. Therefore, the pin at the edge of the electronic component package body is segmented to form a plurality of sub-pins that are disposed at intervals. This not only improves soldering reliability of the edge pin, but also avoids increasing costs by segmenting all pins. In another embodiment, the second part of each pin may alternatively have a plurality of sub-pins that are disposed at intervals. This is not limited in this application.

In some possible implementations, a pad is disposed on a side that is of the substrate and that is away from the circuit board. For example, the substrate further includes a second circuit layer stacked with the packaging layer. The pad is embedded in the second circuit layer. It may be understood that the second circuit layer is disposed on a top surface of the electronic component package body, and the first circuit layer is disposed on the bottom surface of the electronic component package body.

In this embodiment, the electronic component package body has the first circuit layer and the second circuit layer that are disposed opposite to each other, so that both surfaces (the top surface and the bottom surface) of the electronic component package body have circuit layers capable of electrical connection. This can provide a good foundation for double-sided interconnection of the electronic component packaged in the electronic component package body, and facilitate realization of a shortest interconnection path and a thin package of the substrate in a limited space layout, thereby having high practicability and high reliability.

In some possible implementations, the electronic component package body further includes a bonding wire. The pad includes a first pad and a second pad. The first pad and the second pad are disposed at intervals, and are electrically connected by using the bonding wire. The bonding wire may be a metal wire or a metal strip. That is, the second circuit layer uses wire bonding (wire bonding) and/or clip bonding (clip bonding). A quantity, a position, a shape, and the like of the pad on the second circuit layer are not limited in this application. A person skilled in the art can design the quantity, the position, the shape, and the like of the pad based on an actual requirement.

In this embodiment, the second circuit layer is formed on an upper surface of the substrate, and the first pad and the second pad on the second circuit layer are electrically connected by using the bonding wire, thereby avoiding remelting of the first pad and the second pad in a solder reflow process when the first pad and the second pad are soldered through solder reflow. In this way, reliability of the electronic component package body is improved.

In some possible implementations, the electronic component package body further includes a package body. The package body is located on the side that is of the substrate and that is away from the circuit board. The bonding wire is packaged inside the package body, and the package body uses a magnetic material. For example, the magnetic material is a liquid magnetic material, and the bonding wire is packaged through dispensing by using the liquid magnetic material, to form the package body that uses the magnetic material. A type of the magnetic material is not limited in this application. A person skilled in the art can design the type of the magnetic material based on an actual requirement.

In this embodiment, the pads on the second circuit layer are connected by using the bonding wire, and a surface of the second circuit layer is the package body that uses the magnetic material, so that the package body and the bonding wire form a complete winding of a magnetic component (such as a transformer or an inductor). This can prevent an excessive current inside the electronic component package body, thereby helping improve reliability of the electronic device. In addition, the package body is seamlessly connected to the first circuit layer, to facilitate heat dissipation of each electronic component in the substrate, thereby improving heat dissipation performance of the electronic component package body.

According to an example not forming part of the invention, this application further provides an electronic component assembly structure. The electronic component assembly structure includes an electronic component package body, a circuit board, and a solder joint soldered between the electronic component package body and the circuit board. The electronic component package body includes a substrate, an electronic component, and a pin. The electronic component is packaged inside the substrate, and the pin is electrically connected to the electronic component. A groove is disposed on a side that is of the pin and that is away from the electronic component. The groove is recessed from a bottom surface of the pin to a side of the electronic component. The solder joint is embedded in the groove. The groove does not penetrate the pin. It may be understood that pins are disposed at intervals relative to an exposed surface of a first circuit layer, and are connected to each other as a whole on a side close to the substrate. For example, a plurality of sub-pins separated by grooves use a same electrical network.

In this example, a groove is disposed on a side that is of a single pin and that is away from the substrate, and the solder joint is embedded in the groove. This not only increases an exposed surface area of the single pin, but also enhances soldering strength of the pin in a three-dimensional direction, thereby improving reliability of soldering between the electronic component package body and the circuit board. Therefore, reliability of the electronic component assembly structure is improved. A width, a depth, a quantity, or the like of any groove is not limited in this application.

According to a second aspect, this application further provides an electronic device. The electronic device includes a housing and the electronic component assembly structure provided in the first aspect or the example. The electronic component assembly structure is mounted on the housing.

In this embodiment, the electronic device includes the electronic component assembly structure provided in the first aspect or the second aspect. In the electronic component assembly structure, the electronic component package body and the circuit board have soldering areas of different dimensions, thereby improving reliability of secondary soldering of the electronic component assembly structure. Therefore, reliability of the electronic device is improved.

According to an example not according to the invention, this application further provides an electronic component package body. The electronic component package body includes a substrate, an electronic component, and a pin. The electronic component is packaged inside the substrate. The pin is electrically connected to the electronic component, and a partial structure of the pin is exposed relative to the substrate, for soldering to a circuit board. For example, the substrate includes a packaging layer and a first circuit layer. The electronic component is packaged inside the packaging layer. The first circuit layer and the packaging layer are stacked. The first circuit layer has a first surface and a second surface that are disposed opposite to each other. The first surface is located between the packaging layer and the second surface. The first circuit layer includes a plurality of pins that are disposed at intervals. The plurality of pins are electrically connected to the electronic component.

Each pin includes a first part and a second part connected to the first part. The first part is embedded in the first circuit layer. The second part protrudes from the second surface. It may be understood that the second surface is a bottom surface of the electronic component package body, and the electronic component package body provides the pin from the bottom surface. The second part includes a bottom surface and a side surface. The bottom surface is an outer surface that is of the pin and that is away from the packaging layer, and the side surface is located between the bottom surface and the second surface. It may be understood that both the bottom surface and the side surface are exposed relative to the second surface. Both the bottom surface and the side surface are used for soldering with solder.

In this example, the pin protrudes from the substrate, so that a part of the pin soldered to the circuit board is a three-dimensional pin. The pin has soldering areas of different dimensions, and a solder joint can be connected to not only the bottom surface of the pin but also the side surface of the pin, thereby increasing a soldering area of the pin, enhancing soldering strength of the pin in different dimensions, and improving reliability of soldering between the electronic component package body and the circuit board.

In some possible implementations, there are a plurality of pins, and the plurality of pins are disposed at intervals. A side surface of at least one of the pins includes an inclined surface. For example, the second part of the pin may be a stepped structure. Alternatively, a side surface of at least one of the pins includes a stepped surface. For example, the second part of the pin may be a stepped structure. Alternatively, a second part of at least one of the pins includes a curved surface. For example, the second part of the pin is a circular truncated cone.

In this example, the side surface of the second part includes an inclined surface, a stepped surface, or a curved surface, so that on a basis that a height of the second part is the same, a surface area of the side surface of the second part is enlarged to further increase the soldering area of the pin, thereby improving reliability of soldering between the electronic component package body and the circuit board.

In this example, the area of the bottom surface of the pin is greater than the area of the cross section that is of the pin and that is along the second surface, so that after the electronic component package body is soldered to the circuit board, the solder joint and the pin may form an interlocking force in a vertical direction, to further improve strength of the solder joint in a thickness direction of the electronic component package body, thereby avoiding a failure of the solder joint caused by long-term vibration of the electronic component, and improving reliability of an electronic device.

In some possible implementations, a material used for the first part is the same as a main material used for the second part. For example, main materials used for the first part and the second part may be, but are not limited to, copper, aluminum, or gold. It may be understood that the material used for the first part that is of the pin and that is embedded in the first circuit layer is not remelted in a soldering process, to ensure reliability of a circuit of the electronic component package body. The material used for the first part is the same as the main material used for the second part. That is, neither the first part nor the second part of the pin is remelted.

In this example, the main materials used for the first part and the second part of the pin are different from a material used for the solder joint. The first part and the second part of the pin are not remelted in a process of soldering the electronic component package body to the circuit board, and shapes of the first part and the second part are substantially unchanged, to improve soldering reliability of the electronic device.

In the invention, a groove is disposed on a side that is of at least one of the pins and that is away from the substrate. That is, a groove is disposed on a side that is of the pin and that faces the circuit board. The groove is recessed from a bottom surface of the pin to a side of the substrate.

In the invention, a groove is disposed on a side that is of a single pin and that is away from the substrate, thereby increasing an exposed surface area of the single pin, and further increasing a soldering area of the single pin. The groove may be filled with solder when the electronic component package body is soldered, thereby further improving reliability of soldering between the electronic component package body and the circuit board. A width, a depth, a quantity, or the like of any groove is not limited in this application.

In some possible implementations, a side that is of the substrate and that is away from the pin includes a first pad and a second pad. The first pad and the second pad are disposed at intervals. An electronic component assembly structure further includes a bonding wire and a package body. The bonding wire is electrically connected between the first pad and the second pad. The package body is located on a side that is of the substrate and that is away from the circuit board. The bonding wire is packaged inside the package body, and the package body uses a magnetic material.

In this embodiment, the pads on the side that is of the substrate and that is away from the pin are connected by using the bonding wire, and are embedded in the package body that uses the magnetic material, so that the package body and the bonding wire form a complete winding of a magnetic component (such as a transformer or an inductor). This can prevent an excessive current inside the electronic component package body, thereby helping improve reliability of the electronic device. In addition, the package body is seamlessly connected to the first circuit layer, to facilitate heat dissipation of each electronic component in the substrate, thereby improving heat dissipation performance of the electronic component package body.

According to an example not according to the invention, this application further provides an electronic component package body. The electronic component package body includes a substrate, an electronic component, and a pin. The electronic component is packaged inside the substrate, and the pin is electrically connected to the electronic component. A groove is disposed on a side that is of the pin and that is away from the electronic component. The groove is recessed from a bottom surface of the pin to a side of the electronic component. The groove is configured to be filled with solder. The groove does not penetrate the pin. It may be understood that pins are disposed at intervals relative to an exposed surface of a first circuit layer, and are connected to each other as a whole on a side close to the substrate. For example, a plurality of sub-pins separated by grooves use a same electrical network.

In the invention, a groove is disposed on a side that is of a single pin and that is away from the substrate. This not only increases an exposed surface area of the single pin, but also enhances soldering strength of the pin in a three-dimensional direction, thereby improving reliability of soldering between the electronic component package body and another part. A width, a depth, a quantity, or the like of any groove is not limited in this application.

To describe the technical solutions in embodiments of this application or in the background, the following briefly describes the accompanying drawings for describing the embodiments of this application or the background.

The following describes embodiments of this application with reference to the accompanying drawings in the embodiments of this application.

This application provides an electronic device. The electronic device includes a housing and an electronic component assembly structure. The electronic component assembly structure is mounted on the housing. The electronic device may be a product such as a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted device, a wearable device, a drone, or a router. The electronic device may alternatively be a device such as a power supply module, a base station transmitting a communication signal, or a network switching device. In this embodiment, an example in which the electronic device is a vehicle-mounted device is used for description.

<FIG> is a schematic diagram of a partial structure of an electronic component assembly structure <NUM> according to according to an example not forming part of the invention; As shown in <FIG>, the electronic component assembly structure <NUM> includes an electronic component package body <NUM>, a circuit board <NUM>, and a solder joint <NUM> connected between the electronic component package body <NUM> and the circuit board <NUM>. The electronic component package body <NUM> includes an electronic component <NUM>. The electronic component <NUM> may be an active component such as a chip, or may be a passive component such as a capacitor, an inductor, or a resistor. A person skilled in the art can select a type and a quantity of the electronic component <NUM> based on an actual requirement. This is not limited in this application. The electronic component package body <NUM> is a carrier for packaging the electronic component <NUM> and provides functions such as electrical connection, protection, support, heat dissipation, and assembly for the packaged electronic component <NUM>.

In some examples, there are a plurality of electronic components <NUM>. As shown in <FIG>, the electronic component <NUM> includes, for example, a first component <NUM>, a second component <NUM>, and a third component <NUM>. The second component <NUM> is spaced between the first component <NUM> and the third component <NUM>. In some possible implementations, the second component <NUM> is a chip, the first component <NUM> is a resistor, and the third component <NUM> is a capacitor.

In this example, the electronic component package body <NUM> may use a system in package (system in package, SiP), a power supply-in-package (power supply-in-package, PSiP), or an embedded chip package (embedded chip package, ECP) substrate. The system in package is to integrate multi-functional electronic components such as a processor, a memory, and a power management chip into one package body to implement a basically complete function. The embedded chip package substrate may be understood as a substrate structure in which a chip is mounted inside the substrate, then the chip is packaged by using a packaging material, and interconnection is implemented by using a copper hole, a copper column, or the like. In this embodiment, an example in which the electronic component package body <NUM> uses an embedded chip package (embedded chip package, ECP) substrate is used for specific description.

The circuit board <NUM> may be understood as a carrier of the electronic component package body <NUM>, and can carry the electronic component package body <NUM> and be assembled with the electronic component package body <NUM>. The circuit board <NUM> is electrically connected to the electronic component package body <NUM> through soldering by using the solder joint <NUM>, thereby implementing electrical interconnection with the electronic component package body <NUM>. In this embodiment of this application, an example in which the electronic component package body <NUM> is mounted on the circuit board <NUM> is used for description. In another embodiment, the electronic component package body <NUM> may alternatively be mounted on another structure. This is not limited in this example.

It should be noted that <FIG> is merely intended to schematically describe a connection relationship between the circuit board <NUM> and the electronic component package body <NUM>, and is not intended to specifically limit a connection position, a specific structure, and a quantity of each device. The structure illustrated in this example, of this application does not constitute a specific limitation on the electronic component assembly structure <NUM>. In some other embodiments of this application, the electronic component assembly structure <NUM> may include more components than those shown in the figure, or combine some components, or split some components, or have different component arrangements. The components shown in the figure may be implemented by using hardware, software, or a combination of software and hardware.

In this example, the electronic component package body and the circuit board are soldered by using a land grid array (land grid array, LGA). The land grid array is a type of surface-mount packaging, and reliability of soldering between the electronic component package body and the circuit board is relatively poor. In a scenario of long-term mechanical vibration or impact of a temperature change, an electronic device has a risk of an electrical failure caused by unsteady soldering. For example, a pin of the electronic component package body is flush with an outer surface of the electronic component package body, and a surface of the circuit board is attached to the surface of the electronic component package body to connect the pin of the electronic component package body and a corresponding pin on the circuit board. In a long-term mechanical vibration process of the electronic device, a fatigue failure of the solder joint between the electronic component package body and the circuit board causes the solder joint to be broken, thereby affecting reliability of the electronic device.

Therefore, this example provides an electronic component package body <NUM>. A pin of the electronic component package body <NUM> has soldering areas of different dimensions, thereby improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>, reducing a risk of a soldering failure of the electronic component package body <NUM> and the circuit board <NUM> caused by long-term vibration of the electronic component assembly structure <NUM>, and effectively improving board-level reliability of the electronic component assembly structure <NUM>. The following mainly uses four embodiments to specifically describe the electronic component assembly structure <NUM> and the corresponding electronic component package body <NUM> that are provided in this application.

<FIG> is a schematic diagram of a partial cross section of an electronic component assembly structure <NUM> according to according to an example not forming part of the invention. An electronic component package body <NUM> is mounted on a mounting surface <NUM> of a circuit board <NUM>. A solder joint <NUM> is configured to implement electrical connection between the electronic component package body <NUM> and the circuit board <NUM>. For example, the electronic component package body <NUM> includes a substrate <NUM>, an electronic component <NUM>, and a pin <NUM>. The electronic component <NUM> is packaged inside the substrate <NUM>. The pin <NUM> is electrically connected to the electronic component <NUM>, and a partial structure of the pin <NUM> is exposed relative to the substrate <NUM>, for soldering to the circuit board <NUM>.

For example, the substrate <NUM> includes a packaging layer <NUM> and a first circuit layer <NUM>. The electronic component <NUM> is packaged inside the packaging layer <NUM>. The first circuit layer <NUM> and the packaging layer <NUM> are stacked. The first circuit layer <NUM> has a first surface <NUM> and a second surface <NUM> that are disposed opposite to each other. The first surface <NUM> is located between the packaging layer <NUM> and the second surface <NUM>. The mounting surface <NUM> faces the second surface <NUM>, and the solder joint <NUM> is connected between the pin <NUM> and the circuit board <NUM>. It may be understood that the second surface <NUM> is a bottom surface of the substrate <NUM>. As shown in <FIG>, in this embodiment, an example in which the first surface <NUM> of the first circuit layer <NUM> is in contact with the packaging layer <NUM> is used for description. In another embodiment, another structure such as a circuit layer may be further disposed between the packaging layer <NUM> and the first circuit layer <NUM>. This is not limited in this application. A person skilled in the art can design a structure between the first circuit layer <NUM> and the packaging layer <NUM> based on an actual requirement.

There are a plurality of pins <NUM>, and the plurality of pins <NUM> are disposed at intervals. The plurality of pins <NUM> use conducting materials, and are spaced by insulating materials. The insulating material may be, but is not limited to, a liquid photoimageable solder mask (green oil). The plurality of pins <NUM> are electrically connected to the electronic component <NUM>, and are electrically connected to the circuit board <NUM> by using a plurality of solder joints <NUM>. For example, a quantity of pins <NUM> corresponds to a quantity of solder joints <NUM>. When the electronic component package body <NUM> is assembled on the circuit board <NUM>, electrical connection is implemented by using the pin <NUM> and the solder joint <NUM>. A signal generated by a working module electrically connected to the circuit board <NUM> is transmitted to the electronic component package body <NUM> by sequentially using the circuit board <NUM> and the pin <NUM>. Alternatively, a signal generated during processing in the electronic component package body <NUM> is transmitted to a corresponding working module by sequentially using the pin <NUM>, the solder joint <NUM>, and the circuit board <NUM>, to implement communication between the electronic component package body <NUM> and the corresponding working module.

Refer to <FIG> and <FIG> is a schematic diagram of a structure of a part A shown in <FIG> in a first implementation. The pin <NUM> includes a first part <NUM> and a second part <NUM> connected to the first part <NUM>. The first part <NUM> is embedded in the first circuit layer <NUM>, and the second part <NUM> protrudes from the substrate <NUM>. For example, the first part <NUM> is directly connected to the second part <NUM>. In another embodiment, the first part <NUM> may alternatively be indirectly connected to the second part <NUM>. This is not limited in this application. It may be understood that each pin <NUM> extends from the first surface <NUM> to the second surface <NUM>, and protrudes from the second surface <NUM>. That is, a partial structure of the pin <NUM> protrudes from the second surface <NUM> (an outer surface of the electronic component package body <NUM>), to form the pin <NUM> of a three-dimensional structure. It may be understood that the second surface <NUM> is a bottom surface of the electronic component package body <NUM>, and the electronic component package body <NUM> provided in this application provides the pin from the bottom surface.

The second part <NUM> includes a bottom surface <NUM> and a side surface <NUM>. The bottom surface <NUM> is an outer surface that is of the pin <NUM> and that is away from the packaging layer <NUM>, and the side surface <NUM> is located between the bottom surface <NUM> and the second surface <NUM>. It may be understood that both the bottom surface <NUM> and the side surface <NUM> are exposed relative to the second surface <NUM>. When the electronic component package body <NUM> is placed on a reference plane, the bottom surface <NUM> is in contact with the reference plane or parallel to the reference plane, and the side surface <NUM> is connected between the second surface <NUM> and the reference plane. The side surface <NUM> may be a curved surface, or may be a flat surface. This is not limited in this application.

The solder joint <NUM> surrounds the second part <NUM> that is of the pin <NUM> and that protrudes from the second surface <NUM>. That is, the solder joint <NUM> surrounds the bottom surface <NUM> and the side surface <NUM> of the second part <NUM>. As shown in <FIG>, the solder joint <NUM> is located not only on the bottom surface <NUM> of the pin <NUM> but also on the side surface <NUM> of the second part <NUM>, to surround the second part <NUM>.

In this example, the pin <NUM> protrudes from the substrate <NUM>, so that a part of the pin <NUM> soldered to the circuit board <NUM> is a three-dimensional pin <NUM>. The pin <NUM> has soldering areas of different dimensions, and the solder joint <NUM> can be connected to not only the bottom surface <NUM> of the pin <NUM> but also the side surface <NUM> of the pin <NUM>, thereby increasing a soldering area of the pin <NUM>, enhancing soldering strength of the pin <NUM> in different dimensions, and improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>. When the electronic component package body <NUM> and the circuit board <NUM> are assembled and soldered, both a bottom wall of the pin <NUM> and a side wall of the protruding pin <NUM> may be covered with tin, so that the solder joint <NUM> surrounds the bottom surface <NUM> and the side surface <NUM> of the pin <NUM>.

It may be understood that the first circuit layer <NUM> further includes insulating materials, and the insulating materials are spaced between the plurality of pins <NUM>. In some embodiments, the part that is of the pin <NUM> and that is embedded in the first circuit layer <NUM> and the part that is of the pin <NUM> and that protrudes from the first circuit layer <NUM> may be integrally formed, or may be formed in steps. This application does not limit a technology for forming the pin <NUM> in the electronic component package body <NUM>, which may be an etching technology or a laser soldering technology. A person skilled in the art can design the technology based on an actual requirement. For example, the first circuit layer <NUM> is first etched to form a patterned first circuit layer <NUM>, and after the patterned first circuit layer <NUM> is filled with the conducting material, the conducting material is further electroplated along a filled conducting material structure, to form, in steps, the pin <NUM> that protrudes from the first circuit layer <NUM>. Alternatively, the conducting material in the patterned first circuit layer <NUM> is covered by a photoresist, and a partial structure of the insulating material in the patterned first circuit layer <NUM> is etched by using a mask, to integrally form the pin <NUM> that protrudes from the first circuit layer <NUM>.

In some examples, a material used for the solder joint <NUM> includes tin, and the material used for the solder joint <NUM> is different from a material used for the second part <NUM>. In a process of soldering the electronic component package body <NUM> to the circuit board <NUM>, the solder joint <NUM> is remelted to wrap the second part <NUM>. In this case, the second part <NUM> is not remelted. That is, a shape of the second part <NUM> is substantially unchanged in an assembling process, so that the solder joint <NUM> effectively surrounds the second part <NUM>, thereby improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>. Remelting is a process of secondary melting of a metal or an alloy.

In some examples, a material used for the first part <NUM> is the same as a main material used for the second part <NUM>. For example, materials used for the first part <NUM> and the second part <NUM> may be, but are not limited to, copper, aluminum, or gold. It may be understood that main portions of the first part <NUM> and the second part <NUM> of the pin <NUM> are not to be remelted in a secondary assembly process.

In this example, main materials used for the first part <NUM> and the second part <NUM> of the pin <NUM> are different from the material used for the solder joint <NUM>. Main structures of the first part <NUM> and the second part <NUM> of the pin <NUM> are not remelted in the process of soldering the electronic component package body <NUM> to the circuit board <NUM>, and shapes of the first part <NUM> and the second part <NUM> are substantially unchanged, to improve soldering reliability of the electronic component assembly structure <NUM>. However, in a conventional technology, when soldering between the electronic component package body <NUM> and the circuit board <NUM> is implemented by using a ball grid array (ball grid array, BGA), a solder ball is remelted and deformed in the soldering process.

Further refer to <FIG>. In some examples, a side that is of the substrate <NUM> and that is away from the circuit board <NUM> includes a pad <NUM>. For example, the substrate <NUM> further includes a second circuit layer <NUM> stacked with the packaging layer <NUM>. It may be understood that the second circuit layer <NUM> is disposed on a top surface of the electronic component package body <NUM>, and the first circuit layer <NUM> is disposed on the bottom surface of the electronic component package body <NUM>. For example, the second circuit layer <NUM> includes a plurality of pads <NUM> disposed for electrical connection. There may be a difference between pattern designs of the second circuit layer <NUM> and the first circuit layer <NUM>. In other words, the pattern designs of the first circuit layer <NUM> and the second circuit layer <NUM> may be different. This is not strictly limited in this embodiment of this application. The pattern designs of the first circuit layer <NUM> and the second circuit layer <NUM> may be set based on a requirement of the electronic component <NUM> packaged in the electronic component package body <NUM>. For example, the pin <NUM> of the first circuit layer <NUM> and the pad <NUM> of the second circuit layer <NUM> may be copper.

In this example, the electronic component package body <NUM> has the first circuit layer <NUM> and the second circuit layer <NUM> that are disposed opposite to each other, so that both surfaces (the top surface and the bottom surface) of the electronic component package body <NUM> have circuit layers capable of electrical connection. This can provide a good foundation for double-sided interconnection of the electronic component <NUM> packaged in the electronic component package body <NUM>, and facilitate realization of a shortest interconnection path and a thin package of the packaging layer <NUM> in a limited space layout, thereby having high practicability and high reliability.

Further refer to <FIG>. In some examples, a side surface <NUM> of at least one of the plurality of pins <NUM> includes an inclined surface. For example, all side surfaces <NUM> of the plurality of pins <NUM> include inclined surfaces. The second part <NUM> of the pin <NUM> may be a trapezoidal body or a truncated pyramid. In another embodiment, the side surface <NUM> of the pin <NUM> is a curved surface, and a tangent plane of a side surface <NUM> of at least one of the plurality of pins <NUM> is not perpendicular to the bottom surface <NUM>. If a plane and a curved surface have only one intersection point, the plane is a tangent plane of the curved surface. For example, the second part <NUM> of the pin <NUM> may be a circular truncated cone. As shown in <FIG>, a cross section of the second part <NUM> of the pin <NUM> is a trapezoid in a thickness direction perpendicular to the electronic component package body <NUM>. In this case, the second part <NUM> of the pin <NUM> may be a circular truncated cone or a trapezoidal body.

In this example, a cross-sectional shape of the second part <NUM> may be a trapezoid, and the second part <NUM> may be a trapezoidal body, a truncated pyramid, or a circular truncated cone, so that on a basis that a height of the second part <NUM> is the same, a surface area of the side surface <NUM> of the second part <NUM> is enlarged to further increase the soldering area of the pin <NUM>, thereby improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>. A tilt rate of the side surface <NUM> of the pin <NUM> is not limited in this application. A person skilled in the art can reasonably design a tilt angle of the side surface <NUM> of the pin <NUM> based on an area of the second surface <NUM> and a gap between the pins <NUM>.

Further refer to <FIG>. In some examples, an area of the bottom surface <NUM> is greater than an area of a cross section that is of the pin <NUM> and that is along a surface (the second surface <NUM>) of the substrate <NUM>. For example, in a trapezoidal cross-sectional view shown in <FIG>, a length of a lower side of the trapezoid is greater than a length of an upper side of the trapezoid. When the second part <NUM> is a circular truncated cone, an area of a lower surface of the circular truncated cone is greater than an area of an upper surface of the circular truncated cone.

The solder joint <NUM> includes a first segment <NUM> and a second segment <NUM> connected to the first segment <NUM>. The first segment <NUM> is connected between the bottom surface <NUM> of the pin <NUM> and the circuit board <NUM>, and the second segment <NUM> is disposed around a periphery of the side surface <NUM> of the pin <NUM>. A projection of the second segment <NUM> on the circuit board <NUM> partially overlaps a projection of the bottom surface <NUM> of the pin <NUM> on the circuit board <NUM>. It may be understood that, after the electronic component package body <NUM> is soldered to the circuit board <NUM>, the solder joint <NUM> that connects the electronic component package body <NUM> and the circuit board <NUM> in the electronic component assembly structure <NUM> forms an interlocking structure with the pin <NUM>.

In this example, the area of the bottom surface <NUM> of the pin <NUM> is greater than the area of the cross section that is of the pin <NUM> and that is along the second surface <NUM>, so that after the electronic component package body <NUM> is soldered to the circuit board <NUM>, the solder joint <NUM> and the pin <NUM> may form an interlocking force in a vertical direction, to further improve strength of the solder joint <NUM> in a thickness direction of the electronic component package body <NUM>, thereby avoiding a failure of the solder joint caused by long-term vibration of the electronic component <NUM>, and improving reliability of the electronic component assembly structure <NUM>.

<FIG> is a schematic diagram of a structure of a part A shown in <FIG> in a second implementation. In this implementation, a side surface <NUM> of at least one of the plurality of pins <NUM> is a stepped surface. For example, all side surfaces <NUM> of the plurality of pins <NUM> are stepped surfaces. As shown in <FIG>, a cross section of the second part <NUM> of the pin <NUM> is a stepped shape in a thickness direction perpendicular to the electronic component package body <NUM>. In this case, the second part <NUM> of the pin <NUM> may be a shape in which at least two trapezoidal bodies are stacked, or may be a shape in which two circular truncated cones are stacked. For example, in a stepped cross-sectional view shown in <FIG>, a step is upward, and the solder joint <NUM> between the electronic component package body <NUM> and the circuit board <NUM> forms an interlocking structure with the pin <NUM>, thereby improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>.

It may be understood that <FIG> and <FIG> separately list schematic diagrams of cross sections of the pin <NUM> that protrudes from the first circuit layer <NUM> in different implementations. A cross-sectional shape of the second part <NUM> of the pin <NUM> may be a stepped shape, so that an area of the side surface <NUM> of the second part <NUM> is enlarged to further increase the soldering area of the pin <NUM>, thereby improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>. A specific shape of the second part <NUM> of the pin <NUM> is not limited in this embodiment of this application. A person skilled in the art can design the specific shape based on an actual requirement.

<FIG> is a schematic diagram of a partial structure of the electronic component package body <NUM> shown in <FIG> in a third implementation. Specifically, the structure of the electronic component package body <NUM> shown in this implementation may be combined with the structure of any electronic component package body <NUM> shown in <FIG> and <FIG>.

In this implementation, the pin <NUM> further includes a protective layer <NUM>. The protective layer <NUM> is located on an outer surface of the second part <NUM>. For example, the protective layer <NUM> wraps the outer surface of the second part <NUM> through electroplating. Oxidation resistance of a material used for the protective layer <NUM> is greater than oxidation resistance of the material used for the second part <NUM>. For example, the material used for the second part <NUM> includes, but is not limited to, copper or aluminum. The material used for the protective layer <NUM> includes, but is not limited to, tin or gold.

In this example, the pin <NUM> further includes the protective layer <NUM> that wraps the second part <NUM>, and oxidation resistance of the protective layer <NUM> is greater than oxidation resistance of the second part <NUM>. The protective layer <NUM> is configured to protect the second part <NUM> and avoid oxidation of the second part <NUM>, thereby further improving reliability of the electronic component package body <NUM>.

<FIG> is a top view of the electronic component package body <NUM> shown in <FIG>. Shapes of the plurality of pins <NUM> may be the same or different. This is not limited in this application. As shown in <FIG>, an area of a bottom surface <NUM> of a pin <NUM> located in a middle part of the electronic component package body <NUM> is greater than an area of a bottom surface <NUM> of an edge pin <NUM>. A person skilled in the art can design a gap between the pins <NUM> based on an actual situation, to avoid mutual interference between adjacent pins <NUM>. An arrangement manner of the plurality of pins <NUM> is not limited in this application, and may be symmetrical arrangement or asymmetrical arrangement. For example, the plurality of pins <NUM> are symmetrically arranged along a length direction X and a width direction Y of the electronic component package body <NUM>. In another implementation, the plurality of pins <NUM> may alternatively be asymmetrically arranged. This is not limited in this application.

The shapes of the pins <NUM> are not limited in this application, and the shapes of the plurality of pins <NUM> may be the same or different. For example, as shown in <FIG>, the shapes of the pins <NUM> are rectangles in the top view. In another embodiment, the shapes of the pins <NUM> in the top view may alternatively be other geometric shapes, for example, circles. This is not limited in this application.

Refer to <FIG> and <FIG>. <FIG> is a top view of an electronic component assembly structure <NUM> according to Embodiment <NUM> of this application. <FIG> is a schematic diagram of a partial cross section that is of an electronic component package body <NUM> shown in <FIG> and that is along B-B. The electronic component assembly structure <NUM> shown in <FIG> does not show a solder point or a circuit board.

The following mainly describes differences between this embodiment and the example, and most content of this embodiment that is the same as the content of Embodiment <NUM> is not described again. For example, the electronic component package body <NUM> includes a substrate <NUM>, an electronic component <NUM> packaged inside the substrate <NUM>, and a pin <NUM> electrically connected to the electronic component <NUM>. The pin <NUM> protrudes from a surface of the substrate <NUM>. For example, a part that is of the pin <NUM> and that protrudes from the substrate <NUM> may be a circular truncated cone or a trapezoidal body.

In this embodiment, a groove <NUM> is disposed on a side that is of at least one of the pins <NUM> and that is away from the substrate <NUM>. The groove <NUM> is recessed from a bottom surface <NUM> of the pin <NUM> to a side of the substrate <NUM>. That is, a groove <NUM> is disposed on a side that is of at least one of the pins <NUM> and that faces the circuit board. It may be understood that the groove <NUM> does not penetrate the pin <NUM>. For example, there are a plurality of grooves <NUM>. A second part <NUM> of at least one of the pins <NUM> includes a plurality of sub-pins <NUM>. The plurality of sub-pins <NUM> are disposed at intervals, and the plurality of sub-pins <NUM> are all connected to a first part <NUM>. The grooves <NUM> divide the second part <NUM> into a plurality of sub-pins <NUM> that are disposed at intervals. For example, the plurality of sub-pins <NUM> are symmetrically arranged. As shown in <FIG>, the plurality of sub-pins <NUM> are arranged in a matrix form. A gap between any two adjacent sub-pins <NUM> is less than a gap between any two adjacent pins <NUM>.

It may be understood that the plurality of sub-pins <NUM> disposed at intervals in the pin <NUM> are disposed at intervals relative to an exposed surface of the substrate <NUM>, and structures embedded in a first circuit layer <NUM> in the substrate <NUM> are connected to each other as a whole. That is, the plurality of sub-pins <NUM> are the pin <NUM> having a same function. For example, the plurality of sub-pins <NUM> use a same electrical network. As shown in <FIG>, for example, the groove <NUM> is recessed to the first part <NUM> of the pin <NUM>. In another embodiment, the groove <NUM> may alternatively be recessed to another depth. This is not limited in this application. When the electronic component package body <NUM> is mounted on the circuit board, the solder joint not only surrounds the bottom surface and a side surface of the pin <NUM>, but also fills the groove <NUM>, thereby increasing a contact area between the solder joint and the pin <NUM>. That is, when the electronic component assembly structure uses the electronic component package body provided in this embodiment, a partial structure of the solder joint is embedded in the groove <NUM>.

In this embodiment, a groove <NUM> is disposed on a side that is of a single pin <NUM> and that is away from the substrate <NUM>, thereby increasing an exposed surface area of the single pin <NUM>, and further increasing a soldering area of the single pin <NUM>. The groove <NUM> may be filled with solder when the electronic component package body <NUM> is soldered, thereby further improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>. A width, a depth, a quantity, or the like of any groove <NUM> is not limited in this application. A person skilled in the art can design a size of the groove <NUM> based on an actual requirement or a machine requirement. For example, in a method for preparing the electronic component package body <NUM>, a second part <NUM> of a single pin <NUM> may be segmented, to divide the second part <NUM> of the single pin <NUM> into a plurality of sub-pins <NUM> that are disposed at intervals. A segmentation method may be, but is not limited to, etching or a laser.

Further refer to <FIG>. In some embodiments, the electronic component package body <NUM> has a first side surface <NUM> and a second side surface <NUM> that are disposed opposite to each other. A second surface <NUM> is connected between the first side surface <NUM> and the second side surface <NUM>. When the electronic component package body <NUM> is placed on a reference plane, the second surface <NUM> is parallel to the reference plane, and both the first side surface <NUM> and the second side surface <NUM> are perpendicular to the reference plane.

The plurality of pins <NUM> include a first pin <NUM> and a second pin <NUM>. The first pin <NUM> is closest to the first side surface <NUM>, the second pin <NUM> is closest to the second side surface <NUM>, and a plurality of sub-pins <NUM> are disposed on both the first pin <NUM> and the second pin <NUM>. It may be understood that both the first pin <NUM> and the second pin <NUM> are located at an edge of the electronic component package body <NUM>.

In this embodiment, a possibility of a fatigue failure caused by vibration of the electronic component assembly structure <NUM> is relatively high for a pin <NUM> at an edge of the electronic component package body <NUM>. Therefore, the pin <NUM> at the edge of the electronic component package body <NUM> is segmented to form a plurality of sub-pins <NUM> that are disposed at intervals. This not only improves soldering reliability of the edge pin <NUM>, but also avoids increasing costs by segmenting all pins <NUM>. In another embodiment, the second part <NUM> of each pin <NUM> may alternatively have a plurality of sub-pins <NUM> that are disposed at intervals. This is not limited in this application.

As shown in <FIG>, for example, the electronic component package body <NUM> is substantially a rectangle. The plurality of pins <NUM> include the first pin <NUM>, the second pin <NUM>, a third pin <NUM>, and a fourth pin <NUM>. The first pin <NUM>, the second pin <NUM>, the third pin <NUM>, and the fourth pin <NUM> are respectively located at four corners of the first circuit layer <NUM>. In addition, a plurality of sub-pins <NUM> are disposed on each of the first pin <NUM>, the second pin <NUM>, the third pin <NUM>, and the fourth pin <NUM>.

In this embodiment, pins <NUM> at four corners of the electronic component package body <NUM> have a relatively high risk of being shaken off, and a plurality of sub-pins <NUM> that are disposed at intervals are disposed on each of the pins <NUM> at the four corners, to improve reliability of the electronic component assembly structure <NUM>. As shown in <FIG>, in some embodiments, the plurality of pins <NUM> further include a fifth pin <NUM>, the fifth pin <NUM> is located in a middle area of the electronic component package body <NUM>, and a plurality of sub-pins <NUM> that are disposed at intervals are disposed on the fifth pin <NUM>.

Refer to <FIG> and <FIG> is a schematic diagram of a partial cross section that is of a pin <NUM> shown in <FIG> and that is along B-B in another implementation. It the invention, a standard size of the groove <NUM> gradually increases from an opening of the groove <NUM> to a bottom surface of the groove <NUM>. It is understood that an area of the opening of the groove <NUM> is less than an area of the bottom surface of the groove <NUM>. As shown in <FIG>, for example, a cross-sectional shape of the groove <NUM> is an inverted trapezoid.

In invention, the standard size of the groove <NUM> gradually increases from the opening of the groove <NUM> to the bottom surface of the groove <NUM>. After the electronic component package body <NUM> is soldered to the circuit board <NUM>, the solder joint that connects the electronic component package body <NUM> and the circuit board <NUM> in the electronic component assembly structure <NUM> forms an interlocking structure with the pin <NUM>, to further improve strength of the solder joint in a thickness direction of the electronic component package body <NUM>, thereby avoiding a failure of the solder joint caused by long-term vibration of the electronic component <NUM>, and improving reliability of the electronic component assembly structure <NUM>.

<FIG> is a schematic diagram of a partial cross section of an electronic component assembly structure <NUM> according to according to an example not forming part of the invention. Specifically, the electronic component assembly structure <NUM> shown in this embodiment may be combined with the structure of any electronic component package body <NUM> shown in <FIG>.

The following mainly describes differences between this example and the foregoing embodiment, and most content of this example that is the same as the content of the foregoing embodiment is not described again. The electronic component package body <NUM> includes a substrate <NUM>, an electronic component <NUM> packaged inside the substrate <NUM>, and a pin <NUM> electrically connected to the electronic component <NUM>. The pin <NUM> protrudes from a surface of the substrate <NUM>. For example, a part that is of the pin <NUM> and that protrudes from the substrate <NUM> may be a circular truncated cone or a trapezoidal body. For example, a groove <NUM> is disposed on a side that is of at least one of the pins <NUM> and that is away from the substrate <NUM>.

In this embodiment, a second circuit layer <NUM> in the substrate <NUM> includes a first pad <NUM> and a second pad <NUM>. The first pad <NUM> and the second pad <NUM> are disposed at intervals. The electronic component package body <NUM> further includes a bonding wire <NUM>. The bonding wire <NUM> is electrically connected between the first pad <NUM> and the second pad <NUM>, to electrically connect the first pad <NUM> and the second pad <NUM>. For example, the bonding wire <NUM> is electrically connected to a first component <NUM> and a second component <NUM>, and at least a partial structure of the bonding wire <NUM> is located outside a packaging layer <NUM>.

Shapes, quantities, or the like of the first pad <NUM> and the second pad <NUM> are not limited in this application. A person skilled in the art can design the first pad <NUM> and the second pad <NUM> based on an actual requirement. The bonding wire <NUM> may be a metal wire or a metal strip. That is, the second circuit layer <NUM> uses wire bonding (wire bonding) and/or clip bonding (clip bonding). A quantity, a position, a shape, and the like of the pad <NUM> on the second circuit layer <NUM> are not limited in this application. A person skilled in the art can design the quantity, the position, the shape, and the like of the pad <NUM> based on an actual requirement.

In this embodiment, the second circuit layer <NUM> is formed on an upper surface of the packaging layer <NUM>, and the first pad <NUM> and the second pad <NUM> on the second circuit layer <NUM> are electrically connected by using the bonding wire <NUM>, thereby avoiding remelting of the first pad <NUM> and the second pad <NUM> in a solder reflow process when the first pad <NUM> and the second pad <NUM> are soldered through solder reflow. In this way, reliability of the electronic component package body <NUM> is improved.

Further refer to <FIG>. In some examples, the electronic component package body <NUM> further includes a package body <NUM>. The package body <NUM> is located on a side that is of the substrate <NUM> and that is away from a circuit board <NUM>. For example, the package body <NUM> is located on a side that is of the second circuit layer <NUM> in the substrate <NUM> and that is away from the packaging layer <NUM>, and the bonding wire <NUM> is packaged inside the package body <NUM>. The package body <NUM> uses a magnetic material. For example, the magnetic material is a liquid magnetic material, and the bonding wire <NUM> is packaged through dispensing by using the liquid magnetic material, to form the package body <NUM> that uses the magnetic material. A type of the magnetic material is not limited in this application. A person skilled in the art can design the type of the magnetic material based on an actual requirement.

In this example, the pads <NUM> on the second circuit layer <NUM> are connected by using the bonding wire <NUM>, and a surface of the second circuit layer <NUM> is the package body <NUM> that uses the magnetic material, so that the package body <NUM> and the bonding wire <NUM> form a complete winding of a magnetic component (such as a transformer or an inductor). This can prevent an excessive current inside the electronic component package body <NUM>, thereby helping improve reliability of the electronic component assembly structure <NUM>. In addition, the package body <NUM> is seamlessly connected to the first circuit layer <NUM>, to facilitate heat dissipation of each electronic component <NUM> in the packaging layer <NUM>, thereby improving heat dissipation performance of the electronic component package body <NUM>.

An insulating material is used inside the magnetic material, and an exterior of the magnetic material is non-conductive, so that the package body <NUM> that uses the magnetic material is not electrically connected to the bonding wire <NUM>. For example, a metal material is used inside the bonding wire <NUM>, and an exterior of the bonding wire <NUM> is wrapped by an insulating material, to avoid mutual interference between the bonding wire <NUM> and the package body <NUM>.

Refer to <FIG> and <FIG>. <FIG> is a schematic diagram of a structure of an electronic component package body <NUM> according to an example not according to the invention. <FIG> is a schematic diagram of a partial cross section of the electronic component package body <NUM> shown in <FIG>.

The following mainly describes differences between this example and the foregoing embodiments, and most content of this embodiment that is the same as the content of the foregoing embodiments is not described again. For example, the electronic component package body <NUM> includes a substrate <NUM>, an electronic component <NUM> packaged inside the substrate <NUM>, and a pin <NUM> electrically connected to the electronic component <NUM>. A plurality of pins <NUM> are configured to be soldered to a circuit board <NUM>, to implement electrical connection between the electronic component package body <NUM> and the circuit board <NUM>.

In this example, the pins <NUM> do not protrude from the substrate <NUM>, and a groove <NUM> is disposed on a side that is of at least one of the pins <NUM> and that is away from the substrate <NUM>. The groove <NUM> is recessed from a bottom surface <NUM> of the pin <NUM> to a side of the substrate <NUM>. For example, the bottom surface of the pin <NUM> is flush with a second surface <NUM> of the substrate <NUM>. In another example, the bottom surface of the pin <NUM> may alternatively be located between a first surface <NUM> and the second surface <NUM> of a first circuit layer <NUM>.

The groove <NUM> does not penetrate the pin <NUM>. It may be understood that the pins <NUM> are disposed at intervals relative to an exposed surface of the first circuit layer <NUM>, and are connected to each other as a whole on a side close to the substrate <NUM>. For example, a plurality of sub-pins <NUM> separated by grooves <NUM> use a same electrical network.

In this example, a groove <NUM> is disposed on a side that is of a single pin <NUM> and that is away from the substrate <NUM>, and a solder joint can be embedded in the groove <NUM>. This not only increases an exposed surface area of the single pin <NUM>, but also enables the pin to be soldered in different dimensions, thereby enhancing soldering strength of the single pin <NUM>, and improving reliability of soldering between the electronic component package body <NUM> and the circuit board <NUM>. A width, a depth, a quantity, or the like of any groove <NUM> is not limited in this application. A person skilled in the art can design a size of the groove <NUM> based on an actual requirement or a machine requirement. For example, in a method for preparing the electronic component package body <NUM>, a bottom of a single pin <NUM> may be segmented, to divide the bottom of the single pin <NUM> into a plurality of sub-pins <NUM> that are disposed at intervals. A segmentation method may be, but is not limited to, etching or a laser.

In some embodiments, a groove <NUM> is disposed on a side that is of a pin <NUM> located on an edge of the electronic component package body <NUM> in the plurality of pins <NUM> and that is away from the substrate <NUM>. For example, the electronic component package body <NUM> is substantially a rectangle, and grooves <NUM> are disposed on pins <NUM> located at four corners of the electronic component package body <NUM> in the plurality of pins <NUM>. That is, the pins <NUM> located at the four corners of the electronic component package body <NUM> in the plurality of pins <NUM> include a plurality of sub-pins <NUM> that are disposed at intervals. It may be understood that, when the electronic component package body that is soldered to the circuit board and that is in an electronic device uses the electronic component package body provided in Embodiment <NUM>, the solder joint not only surrounds the bottom surface of the pin, but also fills the groove on the bottom surface of the pin, thereby increasing a soldering area between the solder joint and the pin.

In this example, a possibility of a fatigue failure caused by vibration of the electronic component assembly structure <NUM> is relatively high for a pin <NUM> at an edge of the electronic component package body <NUM>. Therefore, the pin <NUM> at the edge of the electronic component package body <NUM> is segmented to form a plurality of sub-pins <NUM> that are disposed at intervals. This not only improves soldering reliability of the edge pin <NUM>, but also avoids increasing costs by segmenting all pins <NUM>. In another embodiment, a side that is of each pin <NUM> and that is away from the substrate <NUM> may alternatively have a plurality of sub-pins <NUM> that are disposed at intervals. This is not limited in this application.

Claim 1:
An electronic component, comprising a substrate (<NUM>), an electronic component (<NUM>), and a pin (<NUM>); the electronic component (<NUM>) is packaged inside the substrate (<NUM>), and the pin (<NUM>) is electrically connected to the electronic component (<NUM>); the pin (<NUM>) comprises a first part (<NUM>) and a second part (<NUM>) connected to the first part (<NUM>), the first part (<NUM>) is embedded in the substrate (<NUM>), and the second part (<NUM>) protrudes from the substrate (<NUM>); the second part (<NUM>) comprises a bottom surface and a side surface, the bottom surface is an outer surface that is of the pin (<NUM>) and that is away from the substrate (<NUM>), the side surface is connected between the bottom surface and the substrate (<NUM>), and both the bottom surface and the side surface are used for soldering with solder;
wherein the electronic component (<NUM>) comprises a package body (<NUM>), the package body (<NUM>) is located on the side that is of the substrate (<NUM>) and that is away from the pin (<NUM>), and the package body (<NUM>) uses a magnetic material, characterized in that:
a groove (<NUM>) is disposed on a side that is of the pin (<NUM>) and that is away from the substrate (<NUM>), and the groove (<NUM>) is recessed from the bottom surface of the pin (<NUM>) to a side of the substrate (<NUM>), and
a size of the groove (<NUM>) gradually increases from an opening of the groove (<NUM>) to a bottom surface of the groove (<NUM>).