CN108987369B - Chip packaging structure, chip function module and electronic equipment - Google Patents

Chip packaging structure, chip function module and electronic equipment Download PDF

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Publication number
CN108987369B
CN108987369B CN201810672320.XA CN201810672320A CN108987369B CN 108987369 B CN108987369 B CN 108987369B CN 201810672320 A CN201810672320 A CN 201810672320A CN 108987369 B CN108987369 B CN 108987369B
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China
Prior art keywords
lead
chip
integrated circuit
leads
circuit die
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CN201810672320.XA
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Chinese (zh)
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CN108987369A (en
Inventor
林峰
李�杰
吴佳华
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Liuzhou Zibo Technology Co ltd
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Liuzhou Zibo Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/495—Lead-frames or other flat leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
    • H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
    • H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
    • H01L23/495—Lead-frames or other flat leads
    • H01L23/49575—Assemblies of semiconductor devices on lead frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732—Location after the connecting process
    • H01L2224/73251—Location after the connecting process on different surfaces
    • H01L2224/73265—Layer and wire connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/93—Batch processes
    • H01L2224/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
    • H01L2224/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/181—Encapsulation

Abstract

The application is applicable to the technical field of optics and electronics, and provides a chip packaging structure which comprises a lead frame, an integrated circuit bare chip, a wire and a packaging body. The lead frame comprises a bonding pad positioned at the middle position and a first lead wire which is arranged on the same side of the corresponding bonding pad and used for transmitting signals of the integrated circuit die. The integrated circuit die includes a plurality of signal transmission terminals. The signal transmission terminals are centrally disposed within a region proximate to the same end of the integrated circuit die. The integrated circuit die is disposed on the pad such that an end provided with a signal transmission end faces the first lead. The signal transmission end is connected with the first lead wire through a lead wire. The package is used to encapsulate the leadframe, integrated circuit die, and wires. The application also provides a chip function module and electronic equipment comprising the chip packaging structure.

Description

Chip packaging structure, chip function module and electronic equipment
Technical Field
The application belongs to the technical field of semiconductor packaging, and particularly relates to a chip packaging structure, a chip function module and electronic equipment.
Background
With electronic products, for example: mobile phones, notebook computers and the like are continuously popularized and continuously developed in the direction of miniaturization and light weight, and quad flat no-lead (QFN) packaging technologies with the characteristics of high density, high performance, low cost and the like are rapidly developed.
However, the pins of the conventional QFN package structure are generally symmetrically and uniformly distributed on the peripheral edges of the QFN package structure, and the single-layer lead frame in the QFN package structure is also unfavorable for complex routing layout, so that the signal transmission ends of the bare chips generally adopting the QFN package structure are also required to be distributed as symmetrically as possible so as to be connected with the pins on the peripheral edges of the QFN package structure in a wire bonding manner. Therefore, for the bare chip with the asymmetrically distributed signal transmission end, for example, the signal transmission end is concentrated on one side, the conventional QFN package structure cannot be used for packaging, and instead, a pad array package structure (LandGrid Array Package, LGA) with a multi-layer routing structure is needed for packaging, but the LGA package structure has complex process and increases the cost of chip packaging.
Disclosure of Invention
The technical problem to be solved in the application is to provide a chip packaging structure, which can package chips with asymmetrically distributed signal transmission ends by adopting a QFN packaging process with lower cost. The application also provides a chip function module using the chip packaging structure and electronic equipment.
The embodiment of the application provides a chip packaging structure, which comprises: lead frame, integrated circuit die, wire, and package. The lead frame comprises a bonding pad positioned at the middle position and a first lead wire which is arranged on the same side of the corresponding bonding pad and used for transmitting signals of the integrated circuit die. The integrated circuit die includes a plurality of signal transmission terminals. The signal transmission terminals are centrally disposed within a region proximate to the same end of the integrated circuit die. The integrated circuit die is disposed on the pad such that an end provided with a signal transmission end faces the first lead. The signal transmission end is connected with the first lead wire through a lead wire. The package is used to encapsulate the leadframe, integrated circuit die, and wires.
The chip packaging structure provided by the embodiment of the application is characterized in that the leads for transmitting signals are correspondingly arranged on the same side of the bonding pad, and the integrated circuit bare chip arranged on the same side of the signal transmission end can be very conveniently connected with the first leads correspondingly arranged on the same side of the bonding pad through the leads, so that the packaging can be carried out in a QFN packaging mode with lower cost.
In some embodiments, the leadframe further includes a second lead. The second lead corresponding pad is provided at a side other than the side opposite to the first lead.
In some embodiments, the number of first leads is correspondingly set according to the number of signal transmission terminals of the integrated circuit die. The number of the second leads corresponding to one side of the pad may be one or more.
In some implementations, the leadframe includes parallel opposing first and second surfaces. The first surface is for disposing an integrated circuit die. The second surface is used for external connection and signal transmission. Each of the first and second leads includes a lead matrix and a pin. The lead matrix is covered by the package body after the package is completed. The pins are extended from a partial area on the second surface of the lead substrate along the thickness direction of the lead substrate. The pins are exposed to the outside after packaging to realize external connection.
In some embodiments, the lead matrix includes oppositely disposed fixed and connecting ends. The fixed end is used for fixing the position of the lead matrix. The connection terminals are for connection with the packaged integrated circuit die. The pin is arranged at any position between the connecting end or the fixed end of the lead matrix and the connecting end.
In some embodiments, the pin on the first lead is disposed between the fixed end and the connection end of the first lead. The pins on the plurality of first leads together form an arc pattern with the side edge of the bonding pad corresponding to the first leads as a chord. The pin of the second lead is arranged at the connecting end of the second lead.
In some embodiments, the length of the extension of the pins along a specific direction is significantly greater than the length of the extension of the pins along other directions, and the specific direction with the longest extension length is defined as the length direction of the pins. The length direction of one part of the pins is intersected with the length direction of the other pins.
In some embodiments, the length direction of the portion of the pins is perpendicular to the length direction of the other pins.
In some embodiments, the pads are formed with a spacing structure on another surface edge parallel to and opposite from the integrated circuit die. The limiting structure comprises a plurality of clamping grooves and flanges, wherein the clamping grooves are formed in the edges of the limiting structure at preset intervals, and the flanges are formed on two sides of each clamping groove. The clamping groove is filled with the packaging body after packaging. The flange is externally connected through conductive adhesive.
In some embodiments, the limiting structures are arranged on a pair of edges of the bonding pad, which are symmetrical to each other, and the number and positions of the clamping grooves and the flanges arranged on the symmetrical edges are in one-to-one correspondence.
In some embodiments, the pads are substantially rectangular. The first lead and the signal transmission end of the integrated circuit die are arranged corresponding to the same right-angle side of the bonding pad. The second lead is arranged corresponding to the other three right-angle sides of the bonding pad.
In certain implementations, the integrated circuit die is a biorecognition die.
The application also provides a chip function module which comprises a circuit board and the chip packaging structure of any one of the embodiments. The circuit board is used for installing the chip packaging structure and realizing specific functions in cooperation with the chip packaging structure.
In some embodiments, the circuit board includes lead connection points corresponding to the leads of the chip package structure and pad connection points connected to the pads of the chip package structure. The pattern of the lead connection points is consistent with the pin pattern of the lead external connection. The pad connection points are arranged in a symmetrical pattern.
In certain embodiments, the chip package structure is a biorecognition chip. The chip function module is a biological recognition module for sensing biological information of a user to carry out identity recognition.
The application also provides electronic equipment, which comprises the chip function module of any one of the embodiments.
In some embodiments, the chip function module is a biometric module for sensing biometric information of a user for identification. The electronic equipment is used for correspondingly executing corresponding functions according to the identification result of the biological identification module.
Additional aspects and advantages of embodiments of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the application.
Drawings
Fig. 1 is a top view of a chip package structure according to a first embodiment of the present application.
Fig. 2 is a bottom view of a chip package structure according to a first embodiment of the present application.
Fig. 3 is a cross-sectional view of a chip package structure according to a first embodiment of the present application along line III-III.
Fig. 4 is a bottom view of a chip package structure according to a second embodiment of the present application.
Fig. 5 is a cross-sectional view of a chip package structure according to a second embodiment of the present application along line V-V.
Fig. 6 is a bottom view of a chip package structure according to a third embodiment of the present application.
Fig. 7 is a cross-sectional view of a chip package structure according to a third embodiment of the present application along line VI-VI.
Fig. 8 is a schematic structural diagram of a chip functional module according to a fourth embodiment of the present application.
Fig. 9 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present application.
Fig. 10 is a schematic structural diagram of a chip package structure array board according to a sixth embodiment of the present application.
FIG. 11 is an enlarged view of a portion XI-XI of FIG. 10.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be interpreted as indicating or implying a relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements or interaction relationship between the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of this application, only the components and settings of a particular example are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the use of reference numerals and/or letters in the various examples is repeated herein for the purpose of simplicity and clarity of presentation and is not in itself an indication of a particular relationship between the various embodiments and/or settings discussed. In addition, the various specific processes and materials provided in the following description of the present application are merely examples of implementing the technical solutions of the present application, but one of ordinary skill in the art should recognize that the technical solutions of the present application may also be implemented by other processes and/or other materials not described below.
Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the present application. It will be appreciated, however, by one skilled in the art that the subject matter of the present application may be practiced without one or more of the specific details, or with other structures, components, etc. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring aspects of the application.
As shown in fig. 1, 2 and 3, a first embodiment of the present application provides a chip package structure 1 for packaging an integrated circuit die 16. The integrated circuit die 16 is used to sense biometric information of a target object for identification, including but not limited to, fingerprint, palm print, ear print, palm print, and other biometric information such as heart rate, vein, blood oxygen concentration, iris, and voice print. The target object may be a human body or other types of organisms.
The chip package structure 1 includes a leadframe 10, a package body 12, an adhesive layer 14, an integrated circuit die 16, and wires 18. The leadframe 10 includes a centrally located pad 102 and first and second leads 104, 106 distributed around the pad 102. The first lead 104 is used for transmitting signals. The second lead 106 may be left empty or may be used to ground to provide electrostatic protection. The bonding pad 102 has a symmetrical structure. The first lead 104 is disposed corresponding to the same side of the pad 102. The second lead 106 is disposed corresponding to the other side of the pad 102.
The number of first leads 104 may be correspondingly set according to the number of signal transmission terminals 160 of the integrated circuit die 16 to be packaged. The second wire 106 is disposed corresponding to one or more sides of the pad 102 other than the side opposite the first wire 104. The number of second leads 106 corresponding to one of the sides of the pad 102 may be set to one or more according to the design requirements of the integrated circuit die 16 to be packaged.
In this embodiment, the signal transmission terminals 160 are centrally disposed within a region proximate to the same end of the integrated circuit die 16. It is understood that the region may include the side edge of the end portion of the integrated circuit die 16 and the area enclosed by a small section of the end portion that is closer to the adjacent two side edges that are connected by opposite ends of the side edge. The signal transmitting end 160 of the integrated circuit die 16 can be very conveniently connected to the first lead 104 disposed on the same side of the corresponding pad 102 by the wire 18.
It is understood that in other embodiments, the integrated circuit die 16 disposed on a different side of the signal transmission terminal 160 may also be preferentially signaled by the first wire 104 disposed on the same side of the pad 102, and the signal transmission terminal 160 respectively farther from the first wire 104 may be signaled by the second wire 106 disposed nearby.
The leadframe 10 defines parallel opposing first and second surfaces 101 and 103. The first surface 101 is used to provide an integrated circuit die 16. The second surface 103 is used for external connection to transmit signals. Each of the first and second leads 104 and 106 includes a lead base 105 and a pin 107. The lead substrate 105 is covered by the package body 12 after the package is completed. The pins 107 extend from a portion of the second surface 103 of the lead body 105 in the thickness direction of the lead body 105. The pins 107 are exposed after the packaging is completed to realize external connection of the whole chip packaging structure 1.
The lead body 105 is in an elongated strip shape and includes a fixed end 1050 and a connecting end 1052 which are disposed opposite to each other. The fixed end 1050 is used to fix the position of the lead substrate 105. The connection terminals 1052 are for connection with the packaged integrated circuit die 16. The pins 107 are disposed at any position between the connection end 1052 or the fixed end 1050 of the lead substrate 105 and the connection end 1052, and may be adjusted according to the pattern of the pins 107 that is required to be exposed after the whole chip package structure 1 is packaged.
In the present embodiment, the pins 107 on the first lead 104 are disposed between the fixed end 1050 and the connection end 1052 of the first lead 104, and the pins 107 on the plurality of first leads 104 together form an arc pattern with a chord on the side of the pad 102 corresponding to the first lead 104. The pin 107 of the second lead 106 is disposed at the connection end 1052 of the second lead 106.
The length of the extension of the pins 107 in a specific direction is significantly greater than the length of the extension of the pins in other directions, and the longest specific direction is defined as the length direction of the pins 107. The length direction of some of the pins 107 intersects the length direction of other pins 107, i.e., not all of the pins 107 are oriented in the same direction. Preferably, the length direction of some of the pins 107 is perpendicular to the length direction of other pins 107. Because the pins 107 are being bonded by a conductive adhesive, such as: since the solder paste, the conductive silver paste, and the like are subjected to the greatest stress along the longitudinal direction thereof during mounting, the stresses applied to the pins 107 having different longitudinal directions during mounting cancel each other out, and the chip package structure 1 is prevented from being displaced.
In this embodiment, the pad 102 is substantially rectangular. The first leads 104 and the signal transmission ends 160 of the integrated circuit die 16 are disposed corresponding to the same right angle side of the pads 102. The second lead 106 is disposed corresponding to the other three right-angle sides of the pad 102. The length direction of the pins 107 on the first lead 104 and the length direction of the pins 107 on the second lead 106 corresponding to the right-angle sides of the pads 102 on the left and right sides of the first lead 104 are along the first direction. The length direction of the pins 107 on the second lead 106 corresponding to the right-angle side of the pad 102 opposite to the first lead 104 is along the second direction. The first direction is perpendicular to the second direction.
The second surface 103 of the bonding pad 102 is formed with a limit structure 1020 on an edge thereof for preventing the chip package structure 1 from being positionally shifted during the SMT process. The limit structure 1020 includes a plurality of slots 1022 formed along the edge at predetermined intervals, and flanges 1024 formed on both sides of each slot 1022. In order to ensure uniform stress on the whole packaged chip package structure 1, the limit structures 1020 should be disposed on the symmetrical edges of the bonding pads 102 in pairs, and the number and positions of the clamping grooves 1022 and the flanges 1024 disposed on the symmetrical edges should be in one-to-one correspondence. In this embodiment, the limit structures 1020 are respectively disposed on the sides of the bonding pad 102 corresponding to the second leads 106 with two symmetrical sides, and each limit structure 1020 on the edge of each side includes three flanges 1024 and three slots 1022 that are arranged at intervals.
The corresponding locations of the slots 1022 are etched away, and the package body 12 fills the slots 1022 until it is flush with the second surface 103 of the pad 102 when packaging is performed. When the packaging is completed, the limiting structures 1020 form interface areas where the materials of the pads 102 where the package 12 and the flange 1024 are located are alternately arranged on the surface of the chip package 1 connected to the circuit board. When SMT is performed, the areas where the bumps 1024 are located are externally connected by a conductive adhesive, and the adhesion between the material areas of the package 12 and the conductive adhesive on both sides of the areas where the bumps 1024 are located is poor, so that the conductive adhesive is limited to the material areas of the pads 102 where the bumps 1024 are located, thereby preventing the chip package structure 1 from being offset due to the flow of the conductive adhesive during mounting.
The integrated circuit die 16 is disposed on the first surface 101 of the pad 102 by the adhesive layer 14 such that the side of the integrated circuit die 16 having the signal transmitting end 160 is disposed toward the first lead 104. The wires 18 are correspondingly connected to the signal transmission ends 160 of the integrated circuit die 16 and the connection ends 1052 of the first leads 104 by wire bonding. The signals of the integrated circuit die 16 are transmitted to the first lead 104 through the wire 18 and then externally transmitted through the corresponding pin 107 on the second surface 103 of the first lead 104. In this embodiment, the integrated circuit die 16 is a fingerprint recognition die, and correspondingly, the chip package structure 1 is a fingerprint recognition chip.
The package 12 is used to encapsulate the leadframe 10, integrated circuit die 16, and wires 18 to support and protect the entire chip package structure 1. The material of the package 12 may be, but is not limited to, polyimide (PI), epoxy molding compound (Epoxy Molding Compound, EMC), silicone, etc.
As shown in fig. 4 and 5, the second embodiment of the present application provides a chip package structure 2, which is substantially the same as the chip package structure 1 in the first embodiment, except that the structure of the pads 202 in the second embodiment is different from the structure of the pads 102 in the first embodiment.
The limit structure 1020 is not disposed at the edge of the second surface 203 of the pad 202. The second surface 203 is a flat surface. The thickness of the bonding pad 202 is approximately equal to the sum of the thicknesses of the lead substrate 205 and the lead 207, so that the second surface 203 of the bonding pad 202 and the end surfaces of the lead 207 of the first lead 204 and the second lead 206 are kept flush after packaging is completed, and the bonding pad and the lead 207 are jointly used as a connection surface for external connection of the chip packaging structure 2.
As shown in fig. 6 and 7, the third embodiment of the present application provides a chip package structure 3, which is substantially the same as the chip package structure 1 of the first embodiment, except that the leads 304 for transmitting signals in the third embodiment may be disposed corresponding to different sides of the pads 302. The integrated circuit die 36 disposed on the bonding pad 302 selects the closest wire 304 for wire bonding according to the distribution of its signal transmission terminals 360.
In this embodiment, the leads are symmetrically distributed around the pad 302, and the shapes and the numbers of the leads 304 on each side of the corresponding pad 302 are the same.
Referring to fig. 2 and 8 together, a fourth embodiment of the present application provides a chip functional module 4, where the chip functional module 4 includes a circuit board 40 and the chip packaging structure 1 in the first embodiment, the second embodiment or the third embodiment. The circuit board 40 is used for mounting the chip packaging structure 1 and matching with the chip packaging structure 1 to realize specific functions. It will be appreciated that, in order to cooperate with the chip package structure 1 to perform a function, one or more other electronic components may be disposed on the circuit board 40 in addition to the traces.
The circuit board 40 includes lead connection points 402 corresponding to the leads of the chip package structure 1 and pad connection points 404 connected to the pads 102 of the chip package structure. The pattern of the lead connection points 402 is consistent with the pattern of the pins 107 of the chip package structure 1. The pad connection points 404 include a limit connection point 406 corresponding to the location of the flange 1024 in the limit structure 1020 and a fixed connection point 408 corresponding to the middle region of the pad 102. The fixed connection points 408 are preferably arranged in a symmetrical pattern so that the stresses to which the chip package structure 1 is subjected can be balanced with each other.
In this embodiment, the pattern of the fixed connection points 408 is six points symmetrically distributed. The chip package 1 is mounted on the circuit board 40 by dispensing conductive adhesive at the lead connection points 402 and the fixed connection points 408 and then SMT.
In this embodiment, the circuit board 40 is a flexible printed circuit board, the chip package structure 1 is a fingerprint recognition chip, and correspondingly, the chip function module 4 is a fingerprint recognition module capable of sensing a fingerprint of a user.
It will be appreciated that the pad connection points 404 include only the fixed connection points 408 provided in the middle region of the second surface 203, corresponding to the pads 102 in the second embodiment where the limit structures 1020 are not provided on the second surface 203.
As shown in fig. 9, a fifth embodiment of the present application provides an electronic device 5, such as a mobile phone, a notebook computer, a tablet computer, a touch-control interaction screen, and so on. The electronic device 5 includes at least one of the chip packaging structure 1 of the first, second or third embodiment or the chip function module 4 of the fourth embodiment. In this embodiment, the chip package structure 1 is a fingerprint recognition chip, or the chip function module 4 is a fingerprint recognition module.
As shown in fig. 10 and 11, a sixth embodiment of the present application provides a chip package structure array board 6, which includes a support frame 60 and a plurality of chip package structures 1 in the first embodiment or the second embodiment, which are fixed on the support frame 60 and arranged in a matrix array. The first leads 104 of the chip package structures 1 arranged in the same row or column are all fixed to the same edge of the support frame 60. Marks 68 are respectively made on the supporting frame 60 at the positions of the same edge of the supporting frame 60, where the same edge of the supporting frame 60 is fixedly connected with the first lead 104, at the two ends of the same row or column of chip packaging structures 1.
The support frame 60 includes a main frame 62 and a plurality of sets of crisscrossed support frame bars 64 formed on the main frame 62. At least one encapsulation area 63 is defined on the main frame 62. The two ends of the supporting frame strip 64 are respectively connected to the inner edge of the packaging region 63 to define a plurality of packaging units 65 in a matrix array arrangement for packaging the chip packaging structure 1 in the packaging region 63.
In this embodiment, the support frame bars 64 intersect vertically to define a rectangular package unit 65. It will be appreciated that in another embodiment, the staggered support frame strips 64 may define other differently shaped packaging units 65. The number and size of the package regions 63 formed on each chip package structure array plate 6 can be adjusted according to the supporting strength of the main frame 62 and the specification of the package mold.
The lead frame 10 of each of the chip package structures 1 is fixed on the inner side edge of the corresponding package unit 65. Wherein the bonding pad 102 is connected to the inner side edge of the package unit 65 by a plurality of fixing bars 66 and is maintained at a substantially middle position inside the package unit 65. The fixed ends 1050 of the first and second leads 104 and 106 are respectively connected to the corresponding inner edges of the package unit 65. The connection ends 1052 of the first and second leads 104 and 106 are directed to the pads 102 located in the middle of the package unit 65, respectively.
The fixed ends 1050 of the first leads 104 in the same row or column of the package units 65 are connected to the inner edges of the same support frame strip 64 or the inner edges of the main frame 62 constituting the package unit 65, respectively. The main frame 62 makes marks 68 at the positions of the inner edges of the supporting frame strips 64 or the inner edges of the main frame 62, which are connected with the fixed ends 1050 of the first leads 104, at the two ends of the same row or column of packaging units 65, respectively. For the chips with signals all transmitted through the first leads 104, when the packaged chip packaging structure array board 6 is subjected to whole board test, the first leads 104 of all the chip packaging structures 1 in a whole row or column can be connected and separated from the supporting frame 60 only by cutting along the corresponding marks 68 at two ends of the packaging unit 65 in the same row or column once, so that the signal test is performed on each chip packaging structure 1 in each row or column on the whole chip packaging structure array board 6 through test equipment.
Compared with the situation that the prior chip packaging structure is provided with the leads 304 for transmitting signals around and the whole chip packaging structure array plate 6 is cut into a plurality of chip packaging structures 1 for multiple times to test, the chip packaging structure array plate 6 can test signals of each chip packaging structure 1 of each row or column on the whole chip packaging structure array plate 6 only by cutting each row or column of the chip packaging structures 1 once, thereby improving the production efficiency and saving the production cost.
In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims (17)

1. A chip package structure, comprising: the integrated circuit die comprises a lead frame, an integrated circuit die, a wire and a packaging body, wherein the lead frame comprises a bonding pad positioned at the middle position and a first lead wire which is arranged on the same side of the bonding pad and corresponds to the bonding pad and used for transmitting signals of the integrated circuit die, the integrated circuit die comprises a plurality of signal transmission ends, the signal transmission ends are intensively arranged in an area close to the same end part of the integrated circuit die, the integrated circuit die is arranged on the bonding pad, one end provided with the signal transmission ends faces the first lead wire, the signal transmission ends are connected with the first lead wire through the wire, and the packaging body is used for sealing the lead frame, the integrated circuit die and the wire.
2. The chip package structure of claim 1, wherein the lead frame further comprises a second lead disposed on a side of the pad opposite to the first lead except for a side thereof.
3. The chip package structure of claim 2, wherein the number of first leads is set correspondingly to the number of signal transmission terminals of the integrated circuit die, and the number of second leads corresponding to one side of the bonding pad is one or more.
4. The chip package structure of claim 1, wherein the lead frame includes parallel and opposite first and second surfaces, the first surface is used for providing an integrated circuit die, the second surface is used for externally connecting and transmitting signals, each of the first and second leads includes a lead base and a lead, the lead base is covered by the package body after the package is completed, the lead extends from a partial area on the second surface of the lead base along a thickness direction of the lead base, and the lead is exposed to the outside after the package to realize external connection and signal transmission.
5. The chip package structure of claim 4, wherein the lead base includes a fixed end and a connection end disposed opposite to each other, the fixed end being for fixing a position of the lead base, the connection end being for connecting with the packaged integrated circuit die, the pin being disposed at any position of the connection end of the lead base or between the fixed end and the connection end.
6. The chip package structure of claim 5, wherein the leads on the first lead are disposed between the fixed end and the connection end of the first lead, the plurality of leads on the first lead together form an arc pattern with a side of the bonding pad corresponding to the first lead as a chord, and the leads on the second lead are disposed at the connection end of the second lead.
7. The chip package structure of claim 4, wherein the length of the leads extending in a specific direction is substantially greater than the length of the leads extending in other directions, the specific direction with the longest extending length being defined as the length direction of the leads, and the length direction of a portion of the leads intersecting the length direction of the other leads.
8. The chip package structure of claim 7, wherein the length direction of the portion of the leads is perpendicular to the length direction of the other leads.
9. The chip package structure of claim 1, wherein the bonding pad is formed with a spacing structure on an edge of the other surface parallel to and opposite to the integrated circuit die, the spacing structure including a plurality of card slots opened along the edge at predetermined intervals, and flanges formed on both sides of each card slot, the card slots being filled with the package body after the package, the flanges being externally connected by a conductive adhesive.
10. The chip package structure of claim 9, wherein the limiting structures are disposed in pairs on a pair of edges of the bonding pad that are symmetrical to each other and the number and positions of the clamping grooves and the flanges disposed on the symmetrical edges are in one-to-one correspondence.
11. The chip package structure of claim 2, wherein the bonding pad is substantially rectangular, the first lead is disposed corresponding to a same right-angle side of the bonding pad, and the second lead is disposed corresponding to other three right-angle sides of the bonding pad.
12. The chip package structure of claim 1, wherein the integrated circuit die is a biometric die.
13. A chip functional module comprising a circuit board and the chip packaging structure of any one of claims 1-12, the circuit board being configured to mount the chip packaging structure and to cooperate with the chip packaging structure to perform a specific function.
14. The chip functional module of claim 13, wherein the circuit board includes lead connection points corresponding to leads of the chip package structure and pad connection points connected to pads of the chip package structure, the pattern of the lead connection points being consistent with the pattern of pins externally connected to the leads, the pad connection points being arranged in a symmetrical pattern.
15. The chip function module of claim 13, wherein the chip package structure is a biometric chip, and the chip function module is a biometric module for sensing biometric information of a user for identification.
16. An electronic device comprising the chip function module of any one of claims 13-15.
17. The electronic device of claim 16, wherein: the chip function module is a biological recognition module for sensing biological information of a user to carry out identity recognition, and the electronic equipment is used for correspondingly executing corresponding functions or not according to the recognition result of the biological recognition module.
CN201810672320.XA 2018-06-26 2018-06-26 Chip packaging structure, chip function module and electronic equipment Active CN108987369B (en)

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CN101471317A (en) * 2007-12-26 2009-07-01 联发科技股份有限公司 Leadframe package and leadframe
CN205004326U (en) * 2014-12-11 2016-01-27 意法半导体公司 Integrated circuit device
CN208570589U (en) * 2018-06-26 2019-03-01 深圳信炜生物识别科技有限公司 A kind of chip-packaging structure, chip functions mould group and electronic equipment

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CN205004326U (en) * 2014-12-11 2016-01-27 意法半导体公司 Integrated circuit device
CN208570589U (en) * 2018-06-26 2019-03-01 深圳信炜生物识别科技有限公司 A kind of chip-packaging structure, chip functions mould group and electronic equipment

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