US20080153205A1 - Semiconductor device and a method for manufacturing the same - Google Patents
Semiconductor device and a method for manufacturing the same Download PDFInfo
- Publication number
- US20080153205A1 US20080153205A1 US12/037,588 US3758808A US2008153205A1 US 20080153205 A1 US20080153205 A1 US 20080153205A1 US 3758808 A US3758808 A US 3758808A US 2008153205 A1 US2008153205 A1 US 2008153205A1
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- wiring board
- sealing resin
- top surface
- wires
- manufacturing
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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
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49855—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers for flat-cards, e.g. credit cards
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G25/00—Household implements used in connection with wearing apparel; Dress, hat or umbrella holders
- A47G25/14—Clothing hangers, e.g. suit hangers
- A47G25/20—Clothing hangers, e.g. suit hangers with devices for preserving the shape of the clothes
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G25/00—Household implements used in connection with wearing apparel; Dress, hat or umbrella holders
- A47G25/14—Clothing hangers, e.g. suit hangers
- A47G25/48—Hangers with clamps or the like, e.g. for trousers or skirts
- A47G25/50—Hooks on hangers for supporting trousers or skirts
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
- G06K19/07732—Physical layout of the record carrier the record carrier having a housing or construction similar to well-known portable memory devices, such as SD cards, USB or memory sticks
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- 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
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49833—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers the chip support structure consisting of a plurality of insulating substrates
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- H01L24/93—Batch processes
- H01L24/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L24/97—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
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
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- H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/45144—Gold (Au) as principal constituent
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- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- 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
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- H01L24/01—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
- H01L24/42—Wire connectors; Manufacturing methods related thereto
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Definitions
- the present invention relates to a semiconductor device and a method for manufacturing the same. Specifically, it relates to a technology which is effectively applied to an SIM card having outside dimensions based on MINI-UICC standards.
- a portable telephone has various functions such as net connection, mail transmission, picture taking and navigation functions in addition to telephone functions.
- a security function like a contact or non-contact IC card is further added to the portable telephone
- Small-sized thin cards having a large number of functions have been developed in the field of cards which are inserted into the card slot of a portable telephone to cope with an increasing number of functions for the portable telephone.
- WO01/84490 discloses this type of a multi-function memory card.
- Patent document 1 WO01/84490
- SIM Subscriber Identity Module
- This small-sized SIM card has outside dimensions which are about half the outside dimensions of the existing SIM card, and most part of the surface of the card is occupied by contact points having ISO (International Standardization Organization) standard-based outside dimensions like SIM cards and IC cards.
- ISO International Standardization Organization
- the semiconductor device of the present invention comprises a first wiring board having a plurality of external connection terminals on one side, semiconductor chips mounted on the other side of the first wiring board and electrically connected to the first wiring board by a plurality of wires, a sealing resin for sealing the semiconductor chips and the wires, and a second wiring board having a plurality of contact points on one side and bonded to the top surface of the sealing resin on the other side, wherein the upper end portions of the loops of the plurality of wires for electrically connecting the first wiring board to the semiconductor chips are exposed from the top surface of the sealing resin and electrically connected to the second wiring board.
- the method for manufacturing a semiconductor device of the present invention comprises the steps of:
- the semiconductor chips sandwiched between a first wiring board having a plurality of external connection terminals formed on one side and a second wiring board having a plurality of contact points on one side can be electrically connected to the first wiring board and the second wiring board, a large number of functions can be realized for a semiconductor device.
- FIG. 1 is a plan view of an SIM card according to an embodiment of the present invention.
- FIG. 2 is a plan view of the SIM card according to the above embodiment of the present invention.
- FIG. 3 is a sectional view of the SIM card cut along line A-A of FIG. 1 ;
- FIG. 4 is a perspective view of the SIM card according to the above embodiment of the present invention.
- FIG. 5 is a plan view of a first large-sized wiring board used for the manufacture of the SIM card of the above embodiment
- FIG. 6 is a plan view of a second large-sized wiring board used for the manufacture of the SIM card of the above embodiment of the present invention.
- FIG. 7 is a sectional view showing a chip mounting step for the SIM card according to the above embodiment of the present invention.
- FIG. 8 is a sectional view showing a wire bonding step for the SIM card of the above embodiment of the present invention.
- FIG. 9 is a sectional view showing a resin molding step for the SIM card of the above embodiment of the present invention.
- FIG. 10 is a sectional view showing a flush burr removing step for the SIM card of the above embodiment of the present invention.
- FIG. 11 is a plan view showing the method for manufacturing the SIM card after the step shown in FIG. 10 ;
- FIG. 12 is a sectional view showing the method for manufacturing the SIM card after the step shown in FIG. 11 ;
- FIG. 13 is a plan view showing another example of the method for manufacturing the SIM card
- FIG. 14 is a sectional view showing the method for manufacturing the SIM card after the step shown in FIG. 12 ;
- FIG. 15 is a sectional view of an SIM card according to another embodiment of the present invention.
- FIG. 16 is a sectional view of an SIM card according to still another embodiment of the present invention.
- An SIM card is a plug-in type multi-function SIM card having a security function like a contact or non-contact IC card and obtained by adding a large-capacity memory to an SIM card for use with a GSM type portable telephone.
- FIG. 1 and FIG. 2 are plan views showing the appearance of the SIM card of this embodiment.
- FIG. 1 shows a surface having contact points connected to an IC chip incorporated in the SIM card
- FIG. 2 shows a surface having external connection terminals connected to a memory chip incorporated in the SIM card.
- FIG. 3 is a sectional view of the key section of the SIM card cut along line A-A of FIG. 1
- FIG. 4 is a perspective view showing the appearance of the SIM card of this embodiment.
- the contact point formed surface shown in FIG. 1 is the front side (top surface) of the SIM card and the external connection terminal formed surface shown in FIG. 2 is the rear side (under surface) of the SIM card.
- the SIM card 1 of this embodiment comprises three semiconductor chips 3 ( 3 I, 3 M, 3 C) between two wiring boards 2 A and 2 B (may be simply referred to as “substrates 2 A and 2 B” hereinafter), and these semiconductor chips 3 ( 3 I, 3 M, 3 C) are sealed with a mold resin 4 .
- the outside dimensions of the SIM card 1 which conform to Mini-UICC standards, the length of its long side is 15 mm, the length of its short side is 12 mm and its thickness is 0.78 mm.
- An oblique cutout 5 showing the direction for inserting the SIM card 1 into the card slot of a portable telephone is formed at one corner of the SIM card. The other corners are rounded with a curvature of about 0.8 mm.
- the main body of the wiring board 2 A is made of a general-purpose resin such as glass epoxy resin, and eight contact points 6 ( 6 a to 6 h ) constituting an interface with an external transmitter/receiver (reader/writer) are formed on one side.
- these contact point 6 formed surface is expressed as the rear surface of the wiring board 2 A and the surface connected to a mold resin 4 through an adhesive 8 is expressed as the top surface (front surface) of the wiring board 2 a.
- the contact points 6 are each composed of a copper foil electrode plated by nickel and gold and function as external terminals.
- the thickness of the wiring board 2 A is about 0.15 mm including the body and the contact points 6 .
- the contact points 6 function as external terminals for the IC chip 3 I.
- the distribution of signals to the eight contact points 6 a to 6 h is the same as that of the existing IC card and SIM card. That is, the contact point 6 a is a power voltage supply terminal (Vcc), the contact point 6 b is a reset signal terminal (RESET), the contact point 6 c is a clock signal terminal (CLK), the contact point 6 e is a ground voltage supply terminal (Vss), and the contact point 6 g is an input/output signal terminal (I/O).
- the other contact points 6 d , 6 f and 6 h which can be used in the future are non-connection terminals (NC) at present. Therefore, these non-connection terminals (contact points 6 d , 6 f , 6 h ) may be omitted according to the purpose of the SIM card.
- the wiring board 2 B has a body made of a general-purpose resin such as glass epoxy resin like the above wiring board 2 A, and 20 external connection terminals 7 composed of a copper foil plated with nickel and gold are formed on one side of the wiring board 2 B in such a manner that they are arranged in two rows along the short sides.
- the thickness of the wiring board 2 B is about 0.15 mm which is the same as that of the wiring board 2 A.
- the external connection terminal 7 formed surface is expressed as the rear surface of the wiring board 2 B and the semiconductor chip 3 formed surface is expressed as the top surface (front surface) of the wiring board 2 B.
- the 20 external connection terminals 7 are formed on the rear surface of the wiring board 2 B and include data terminals (DATA 0 to DATA 3 ), power voltage supply terminal (Vcc), power voltage supply terminal dedicated for an IC chip (Vcc-IC), ground voltage supply terminals (Vss 1 , Vss 2 ), clock signal terminal (SCLK), plug-in/plug-out detection terminal (INS) and bus status terminal (BS) as the interface of a memorystic PRO.
- the antenna terminals of a non-contact IC card are external antenna connection terminals (LA, LB).
- the terminals of a contact IC card are reset signal terminal (RES) clock signal terminal (CLK) and input/output terminal (I/O). Terminals which can be used for an 8-bit data bus in the future are reserved terminals (DATA 4 to DATA 7 ). That is, these external connection terminals 7 function as the external terminals of a memory chip 3 M.
- the power voltage supply terminal (Vcc) and the ground voltage supply terminals (Vss) are longer than the other external connection terminals 7 . This is aimed to prevent the malfunction of the semiconductor chips 3 by contacting the power voltage supply terminal (Vcc) and the ground voltage supply terminal (Vss 1 ) to the terminals of a connector so as to supply power before signals are supplied to the semiconductor chips 3 through the other external connection terminals 7 when the SIM card 1 is inserted into the connector of a portable telephone.
- the SIM card 1 of this embodiment has external terminals on the front side and the rear side. That is, the external connection terminals 7 of the IC chip 3 I are arranged on the front side of the SIM card 1 (rear surface of the wiring board 2 A) and the external terminals 7 of the memory chip 3 M are arranged on the rear side (rear side of the wiring board 2 B) of the SIM card 1 . As will be described in detail hereinafter, the number of functions of the SIM card can be increased due to this structure of the SIM card 1 .
- three semiconductor chips 3 are interposed between the wiring board 2 A and the wiring board 2 B. These semiconductor chips 3 are mounted on the top surface of the wiring board 2 B and sealed with a mold resin 4 .
- the three semiconductor chips 3 are an IC chip 3 I, a controller chip 3 C and a memory chip 3 M made of silicon and having a thickness of 0.03 to 0.30 mm.
- Integrated circuits such as a central processing unit, ROM (Read Only Memory), RAM (Random Access memory) and EEPROM (Electrically Erasable Programmable RO) are formed on the main surface of the IC chip 3 I. Execution programs and crypto algorithms are stored in the ROM.
- the RAM functions as a memory for data processing and the EEPROM functions as a memory for storing data.
- a flash memory having a capacity of 32 MB to several GB is formed on the main surface of the memory chip 3 M.
- the flash memory mainly functions as a memory for storing user data.
- Integrated circuits for controlling the interfaces of the IC chip 3 I and the memory chip 3 M are formed on the main surface of the controller chip 3 C.
- the memory chip 3 M and the controller chip 3 C are bonded to the top surface of the wiring board 2 B and the IC chip 3 I is bonded to the top surface of the memory chip 3 M.
- These three semiconductor chips 3 are electrically connected to electrodes 22 on the top surface of the wiring board 2 B from the electrodes (not shown) of the semiconductor chips 3 by gold wires 9 , and the electrodes 22 on the wiring board 2 B are electrically connected to the above external connection terminals 7 through via holes (not shown) formed in the wiring board 2 B. That is, the three semiconductor chips 3 are electrically connected to the external connection terminals 7 through the gold wires 9 , the electrodes of the semiconductor chips 3 , the electrodes of the wiring board 2 B and the via holes.
- the mold resin 4 for sealing the three semiconductor chips 3 is a thermosetting epoxy resin containing a quartz filler and has a thickness of about 0.45 mm.
- the wiring board 2 A is bonded to the top surface of the mold resin 4 by the adhesive 8 .
- the above adhesive 8 interposed between the top surface of the mold resin 4 and the wiring board 2 A is an epoxy resin-based non-conductive adhesive and has a thickness of about 0.03 mm.
- the IC chip 3 I formed on the memory chip 3 M is also electrically connected to the contact points 6 of the wiring board 2 A. That is, the upper end portions of the loops of the gold wires 9 for connecting the IC chip 3 I to the wiring board 2 B are slightly exposed from the top surface of the mold resin 4 .
- the number of gold wires 9 exposed from the top surface of the mold resin 4 is, for example, five.
- the gold wires 9 exposed from the top surface of the mold resin 4 are coated with a conductive adhesive 10 .
- electrodes (not shown) connected to the respective five contact points ( 6 a , 6 b , 6 c , 6 e , 6 g ) excluding the above non-connected terminals (NC) and via holes 11 are formed in the wiring board 2 A over the conductive adhesive 10 .
- the five gold wires 9 whose upper end portions are exposed from the top surface of the mold resin 4 are electrically connected to the respective contact points ( 6 a , 6 b , 6 c , 6 e , 6 g ) through the conductive adhesive 10 , electrodes and via holes 11 .
- the non-connection terminals (NC) may be used as antenna terminals for an RF interface or USB interface. By using the non-connected terminals (NC), the SIM card 1 can have more functions.
- FIG. 4 is a perspective view of the SIM card 1 of this embodiment. As shown in FIG. 4 , the front side of the SIM card 1 is covered by the wiring board 2 A, the rear side of the SIM card 1 is covered by the wiring board 2 B, and the mold resin 4 and the adhesive 8 are exposed to the side surfaces of the SIM card 1 . As will be described hereinafter, the production time and the production cost of the SIM card 1 can be reduced by this structure.
- FIG. 5 is a plan view of a large-sized wiring board 12 A used for the manufacture of an SIM card and FIG. 6 is a plan view of a large-sized wiring board 12 B used for the manufacture of an SIM card.
- the large-sized wiring board 12 A shown in FIG. 5 has a plurality of sets of the contact points ( 6 a to 6 h ) of the wiring board 2 A shown in FIG. 1 which are arranged in a matrix, and the area shown by a broken line in the figure is an area (unit) occupied by one wiring board 2 A.
- the large-sized wiring board 12 B shown in FIG. 6 has a plurality of sets of the 20 external connection terminals 7 of the wiring board 2 B shown in FIG. 2 which are arranged in a matrix, and the area shown by a broken line in the figure is an area (unit) occupied by one wiring board 2 B.
- via holes 11 and electrodes connected to the contact points ( 6 a , 6 b , 6 c , 6 e , 6 g ) are formed in each unit of the large-sized wiring board 12 A.
- via holes and electrodes 22 connected to the external connection terminals 7 are formed in each unit of the large-sized wiring board 12 B.
- FIG. 7 To manufacture an SIM card, as shown in FIG. 7 , three semiconductor chips 3 are first mounted on each unit of the large-sized wiring board 12 B.
- the top surface of the large-sized wiring board 12 B will become the top surface of the wiring board 2 B on which the semiconductor chips 3 will be mounted.
- the rear surface of the large-sized wiring board 12 B will become the rear surface of the wiring board 2 B on which the external connection terminals 7 will be formed.
- the controller chip 3 C and the memory chip 3 M are bonded to the top surface of the large-sized wiring board 12 B by pellets using an adhesive or an adhesive film (not shown), and the IC chip 3 I is bonded to the memory chip 3 M by pellets using an adhesive or an adhesive film (not shown).
- the reason why the IC chip 3 I is formed on the memory chip 3 M at this point is that the memory chip 3 M is larger than the IC chip 3 I and has a large area. If an IC chip 3 I having a relatively small area is formed under the memory chip 3 M, there will occur such inconvenience that the IC chip 3 I cannot be connected by the gold wire.
- a chip having a relatively large surface area is arranged at a lower position and a chip having a relatively small surface area is formed above the chip.
- the IC chip 3 I is arranged such that its periphery does not project from the outer periphery of the memory chip 3 M. That is, the IC chip 3 I is arranged on the inner side of the outer periphery of the memory chip 3 M.
- the three semiconductor chips 3 are connected to the respective electrodes (not shown) of the large-sized wiring board 12 B by the gold wires 9 using a widely-known wire bonding apparatus.
- the gold wires 9 for connecting the electrodes of the large-sized wiring board 12 B to the IC chip 3 I are bonded such that the upper end portions of their loops become higher than the top surface (position shown by a one-dotted chain line in the figure) of the mold resin 4 to be molded later. That is, the height of the gold wire 9 is set above the height of the mold resin 4 with the top surface of the wiring board 12 B as a standard.
- the gold wire (first wire) 9 for connecting the IC chip 3 I to the electrode 22 of the wiring board 12 B is set higher than the gold wire (second wire) 9 for connecting the memory chip 3 M to the electrode 22 of the wiring board 12 B. This is intended to prevent contact between the first wire 9 and the second wire 9 .
- the above large-sized wiring board 12 B is placed in the cavity 21 of a mold 20 consisting of an upper mold 20 A and a lower mold 20 B.
- the upper end portion of the gold wire 9 connected to the IC chip 3 I is brought into close contact with the surface of the upper mold 20 A by elastic deformation. Since the gold wire 9 is elastic and easily deforms, even when its upper end portion is pressed against the upper mold 20 A, the contact portion between the IC chip 3 I and the gold wire 9 is not damaged.
- the large-sized wiring board 12 B is taken out of the mold 20 ( FIG. 10 ).
- the upper end portions of the gold wires 9 connected to the IC chip 3 I become the same height as the top surface of the mold resin 4 at this point, very thin resin flush burrs adhere to the surfaces of the upper end portions of the gold wires 9 .
- the upper end portions of the gold wires 9 are exposed from the top surface of the mold resin 4 to a certain extent. That is, the gold wires 9 are partially exposed from the top surface of the mold resin 4 .
- the top surface of the mold resin 4 is vaporized by using a laser beam having a short wavelength, or is sputtered. Or, the top surface of the mold resin 4 may be blasted. Further, a jet of high-pressure water may be applied from the end of a nozzle, or etching using a chemical for dissolving the mold resin 4 may be employed.
- FIG. 11 is a plan view of the top surface of the mold resin 4 after the flush burrs have been removed. As shown in the figure, the upper end portions of the gold wires 9 are exposed to positions corresponding to the contact points ( 6 a , 6 b , 6 c , 6 e , 6 g ) of each unit.
- the conductive adhesive 10 is then applied to the top portions of the gold wires 9 exposed from the top surface of the mold resin 4 .
- the application of the conductive adhesive 10 is carried out by screen printing or potting, for example.
- the non-conductive adhesive 8 is applied to the area excluding the areas from which the gold wires 9 are exposed out of the top surface of the mold resin 4 .
- the conductive adhesive 10 may be applied to the area where the non-conductive adhesive 8 will be applied and the top portions of the gold wires 9 at the same time.
- the conductive adhesive 10 applied to the top portions of the gold wires 9 has such high elasticity that it can easily deform when the large-sized wiring board 12 A is bonded to the top surface of the mold resin 4 in the subsequent step.
- an adhesive sheet 14 having openings 13 around the gold wires 9 may be bonded to the entire top surface of the mold resin 4 , and the conductive adhesive 10 may be applied to the top portions of the gold wires 9 before or after the above step.
- an anisotropic conductive film having an adhesive coat on both sides may be bonded to the entire top surface of the mold resin 4 .
- electrodes connected to the via holes 11 are formed on one surface (opposed to the mold resin 4 ) of the large-sized wiring board 12 A, when the anisotropic conductive film is bonded to the top surface of the mold resin 4 and the large-sized wiring board 12 A is placed on the anisotropic conductive film, only parts of the anisotropic conductive film at positions in contact with the electrodes becomes conductive, thereby making it possible to electrically connect the gold wires 9 to the electrodes.
- the large-sized wiring board 12 A is placed on the top surface of the mold resin 4 and bonded to the mold resin 4 by the adhesive 8 .
- the contact points ( 6 a , 6 b , 6 c , 6 e , 6 g ) are electrically connected to the gold wires 9 through the conductive adhesive 10 applied to the top portions of the gold wires 9 , the electrodes of the large-sized wiring board 12 A and the via holes 11 .
- the large-sized wiring board 12 A, the mold resin 4 and the large-sized wiring board 12 B are cut along the outer circumferences of the units to obtain the SIM cards of this embodiment shown in FIGS. 1 to 4 . Since the oblique cutout 5 must be formed at one corner of the SIM card 1 and the other corners must be rounded as described above, by cutting the large-sized wiring boards 12 A and 12 B and the mold resin 4 with a jet of high-pressure wafer from the end of the nozzle, cutting can be carried out simultaneously with the formation of the cutout 5 and the rounding of the corners. Water jet cutting and dicing are used in combination so that dicing is used to cut linear portions and water jet cutting is used to form the cutout 5 and round the corners.
- the cutting time can be shortened as compared with a case where only water jet cutting is used. Since the linear portions can be cut at once by dicing when the SIM card 1 is formed by this manufacturing method, the production cost per SIM card 1 can be cut.
- the large-sized wiring boards 12 A and 12 B are used to carry out molding.
- the method for manufacturing the SIM card 1 is not limited to this and transfer molding in which each SIM card 1 is sealed individually may be employed.
- the SIM card 1 comprises the memory chip 3 M, the IC chip 3 I and the controller chip 3 C.
- the SIM card 1 may be constituted such that the IC chip 3 I and the controller chip 3 C are integrated to one chip.
- the SIM card 1 has a two-chip structure that a chip 31 C including an IC chip and a controller chip is existent on the memory chip 3 M having a flash memory.
- Gold wires (first wires) 9 exposed from the top surface of the mold resin 4 and gold wires (second wires) 9 not exposed from the top surface of the mold resin extend from the chip 31 C.
- the above first wires 9 are connected to the contact points 6 through the conductive adhesive 10 and the via holes 11 and to the external connection terminals 7 through the electrodes 22 formed on the wiring board 2 B.
- the above second wires 9 are formed at a height lower than the above first wires 9 and are connected to the external connection terminals 7 through the electrodes 22 formed on the wiring board 2 B.
- the space of the controller chip 3 C can be eliminated, which is effective for the microfabrication of the SIM card 1 .
- a chip having another function or a flash memory chip can be mounted on the above space. In this case, it is possible to further increase the number of functions or the capacity of the SIM card 1 .
- the present invention can be applied to a case where the memory chip 3 M and the chip 31 C including the IC chip and the controller chip are integrated to one chip to manufacture a chip 3 MIC.
- the present invention can be applied to a case where the memory chip 3 M and the chip 31 C including the IC chip and the controller chip are integrated to one chip to manufacture a chip 3 MIC.
- a multi-function SIM card having memory card functions and SIM card functions has been described.
- the functions of the card are not limited to these functions.
- the present invention can be applied to a card having various functions such as a card having only memory card functions, a card having only SIM card functions or a card including semiconductor chips having functions different from those of a memory card and an SIM card.
- a memorystic PRO as shown in FIG. 2 is given as the interface of the SIM card 1 but the present invention is not limited to this and may be an interface terminal structure according to purpose, such as a multi-media card, SD card or USB.
- the types and number of semiconductor chips to be mounted on the wiring board and a combination of these semiconductor chips may be changed according to the functions of a card. For instance, in a card having only memory card functions, a system can be constructed with one or more memory chips having a nonvolatile memory from and to which data can be electrically erased or written and an interface controller chip for controlling memory interface operation for the memory chip(s).
- the number of external connection terminals on the wiring board for mounting semiconductor chips can be changed according to required functions. When the number of external connection terminals is small, all the external connection terminals can be arranged in a row.
- the structure and manufacturing method of the present invention in which a wiring board over a sealing resin is connected to semiconductor chips by wires exposed from the top surface of the sealing resin can be applied to semiconductor packages other than cards.
- the SIM card of the present invention can have various functions by changing the types and a combination of semiconductor chips to be mounted on the wiring board, it can be used not only as a multi-function SIM card but also as other composite function card and communication card.
Abstract
A semiconductor device comprising a first wiring board having a plurality of external connection terminals on one side, semiconductor chips mounted on the other side of the first wiring board and electrically connected to the first wiring board by a plurality of wires, a sealing resin for sealing the semiconductor chips and the wires, and a second wiring board having a plurality of contact points on one side and bonded to the top surface of the sealing resin on the other side, wherein
the upper end portions of the loops of the plurality of wires for electrically connecting the first wiring board to the semiconductor chips are exposed from the top surface of the sealing resin and electrically connected to the second wiring board.
Description
- The present application claims priority from Japanese patent application No. 2005-068362 filed on Mar. 11, 2005, the content of which is hereby incorporated by reference into this application.
- The present invention relates to a semiconductor device and a method for manufacturing the same. Specifically, it relates to a technology which is effectively applied to an SIM card having outside dimensions based on MINI-UICC standards.
- A portable telephone has various functions such as net connection, mail transmission, picture taking and navigation functions in addition to telephone functions. Nowadays, a security function like a contact or non-contact IC card is further added to the portable telephone Small-sized thin cards having a large number of functions have been developed in the field of cards which are inserted into the card slot of a portable telephone to cope with an increasing number of functions for the portable telephone.
- WO01/84490 (patent document 1) discloses this type of a multi-function memory card.
- Patent document 1: WO01/84490
- One of SIM (Subscriber Identity Module) cards for use with a GSM type portable telephone is a small-sized SIM card having outside dimensions based on Mini-UICC standards.
- This small-sized SIM card has outside dimensions which are about half the outside dimensions of the existing SIM card, and most part of the surface of the card is occupied by contact points having ISO (International Standardization Organization) standard-based outside dimensions like SIM cards and IC cards.
- Therefore, when a memory chip is to be added to the inside of a card in order to increase the number of functions of this small-sized SIM card, the external connection terminal of the added chip cannot be arranged on the surface of the card.
- It is an object of the present invention to provide a technology for promoting an increase in the number of functions of a small-sized SIM card having outside dimensions based on Mini-UICC standards.
- The above and other objects and features of the present invention will become apparent from the following description when taken in conjunction with the accompanying drawings.
- Out of the inventions disclosed by the present application, brief descriptions of typical inventions are given below.
- The semiconductor device of the present invention comprises a first wiring board having a plurality of external connection terminals on one side, semiconductor chips mounted on the other side of the first wiring board and electrically connected to the first wiring board by a plurality of wires, a sealing resin for sealing the semiconductor chips and the wires, and a second wiring board having a plurality of contact points on one side and bonded to the top surface of the sealing resin on the other side, wherein the upper end portions of the loops of the plurality of wires for electrically connecting the first wiring board to the semiconductor chips are exposed from the top surface of the sealing resin and electrically connected to the second wiring board.
- The method for manufacturing a semiconductor device of the present invention comprises the steps of:
- (a) preparing a first wiring board having a plurality of external connection terminals on one side and a second wiring board having a plurality of contact points on one side;
- (b) mounting semiconductor chips on the other side of the first wiring board and electrically connecting the first wiring board to the semiconductor chips by wires;
- (c) placing the first wiring board in a mold in such a manner that the other side faces up, and bringing the upper end portions of the loops of the wires into contact with the top of the cavity of the mold;
- (d) injecting a resin into the cavity to seal the semiconductor chips and the wires with the sealing resin and exposing the upper end portions of the loops of the wires from the top surface of the sealing resin; and
- (e) bonding the other side of the second wiring board to the top surface of the sealing resin to electrically connect the wires exposed from the top surface of the sealing resin to the second wiring board.
- The effect obtained by the typical inventions out of inventions disclosed in this application is briefly described hereinbelow.
- Since the semiconductor chips sandwiched between a first wiring board having a plurality of external connection terminals formed on one side and a second wiring board having a plurality of contact points on one side can be electrically connected to the first wiring board and the second wiring board, a large number of functions can be realized for a semiconductor device.
-
FIG. 1 is a plan view of an SIM card according to an embodiment of the present invention; -
FIG. 2 is a plan view of the SIM card according to the above embodiment of the present invention; -
FIG. 3 is a sectional view of the SIM card cut along line A-A ofFIG. 1 ; -
FIG. 4 is a perspective view of the SIM card according to the above embodiment of the present invention; -
FIG. 5 is a plan view of a first large-sized wiring board used for the manufacture of the SIM card of the above embodiment; -
FIG. 6 is a plan view of a second large-sized wiring board used for the manufacture of the SIM card of the above embodiment of the present invention; -
FIG. 7 is a sectional view showing a chip mounting step for the SIM card according to the above embodiment of the present invention; -
FIG. 8 is a sectional view showing a wire bonding step for the SIM card of the above embodiment of the present invention; -
FIG. 9 is a sectional view showing a resin molding step for the SIM card of the above embodiment of the present invention; -
FIG. 10 is a sectional view showing a flush burr removing step for the SIM card of the above embodiment of the present invention; -
FIG. 11 is a plan view showing the method for manufacturing the SIM card after the step shown inFIG. 10 ; -
FIG. 12 is a sectional view showing the method for manufacturing the SIM card after the step shown inFIG. 11 ; -
FIG. 13 is a plan view showing another example of the method for manufacturing the SIM card; -
FIG. 14 is a sectional view showing the method for manufacturing the SIM card after the step shown inFIG. 12 ; -
FIG. 15 is a sectional view of an SIM card according to another embodiment of the present invention; and -
FIG. 16 is a sectional view of an SIM card according to still another embodiment of the present invention. - Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In all the figures for explaining the embodiments, the same members are basically given the same reference symbols and their repeated descriptions are omitted.
- An SIM card according to an embodiment of the present invention is a plug-in type multi-function SIM card having a security function like a contact or non-contact IC card and obtained by adding a large-capacity memory to an SIM card for use with a GSM type portable telephone.
-
FIG. 1 andFIG. 2 are plan views showing the appearance of the SIM card of this embodiment.FIG. 1 shows a surface having contact points connected to an IC chip incorporated in the SIM card, andFIG. 2 shows a surface having external connection terminals connected to a memory chip incorporated in the SIM card.FIG. 3 is a sectional view of the key section of the SIM card cut along line A-A ofFIG. 1 , andFIG. 4 is a perspective view showing the appearance of the SIM card of this embodiment. In the following description, for convenience's sake, the contact point formed surface shown inFIG. 1 is the front side (top surface) of the SIM card and the external connection terminal formed surface shown inFIG. 2 is the rear side (under surface) of the SIM card. - The
SIM card 1 of this embodiment comprises three semiconductor chips 3 (3I, 3M, 3C) between twowiring boards substrates mold resin 4. As for the outside dimensions of theSIM card 1 which conform to Mini-UICC standards, the length of its long side is 15 mm, the length of its short side is 12 mm and its thickness is 0.78 mm. An oblique cutout 5 showing the direction for inserting theSIM card 1 into the card slot of a portable telephone is formed at one corner of the SIM card. The other corners are rounded with a curvature of about 0.8 mm. - As shown in
FIG. 1 andFIG. 3 , one surface of thewiring board 2A is exposed to the front surface of theSIM card 1. The main body of thewiring board 2A is made of a general-purpose resin such as glass epoxy resin, and eight contact points 6 (6 a to 6 h) constituting an interface with an external transmitter/receiver (reader/writer) are formed on one side. In this embodiment, for convenience's sake, thesecontact point 6 formed surface is expressed as the rear surface of thewiring board 2A and the surface connected to amold resin 4 through an adhesive 8 is expressed as the top surface (front surface) of the wiring board 2 a. - The
contact points 6 are each composed of a copper foil electrode plated by nickel and gold and function as external terminals. The thickness of thewiring board 2A is about 0.15 mm including the body and thecontact points 6. Thecontact points 6 function as external terminals for the IC chip 3I. - The distribution of signals to the eight
contact points 6 a to 6 h is the same as that of the existing IC card and SIM card. That is, thecontact point 6 a is a power voltage supply terminal (Vcc), thecontact point 6 b is a reset signal terminal (RESET), thecontact point 6 c is a clock signal terminal (CLK), thecontact point 6 e is a ground voltage supply terminal (Vss), and thecontact point 6 g is an input/output signal terminal (I/O). Theother contact points contact points - As shown in
FIG. 2 andFIG. 3 , one side of thewiring board 2B is exposed to the rear side of theSIM card 1. Thewiring board 2B has a body made of a general-purpose resin such as glass epoxy resin like theabove wiring board external connection terminals 7 composed of a copper foil plated with nickel and gold are formed on one side of thewiring board 2B in such a manner that they are arranged in two rows along the short sides. The thickness of thewiring board 2B is about 0.15 mm which is the same as that of thewiring board 2A. In this embodiment, for convenience's sake, theexternal connection terminal 7 formed surface is expressed as the rear surface of thewiring board 2B and the semiconductor chip 3 formed surface is expressed as the top surface (front surface) of thewiring board 2B. - In this embodiment, the 20
external connection terminals 7 are formed on the rear surface of thewiring board 2B and include data terminals (DATA0 to DATA3), power voltage supply terminal (Vcc), power voltage supply terminal dedicated for an IC chip (Vcc-IC), ground voltage supply terminals (Vss1, Vss2), clock signal terminal (SCLK), plug-in/plug-out detection terminal (INS) and bus status terminal (BS) as the interface of a memorystic PRO. The antenna terminals of a non-contact IC card are external antenna connection terminals (LA, LB). The terminals of a contact IC card are reset signal terminal (RES) clock signal terminal (CLK) and input/output terminal (I/O). Terminals which can be used for an 8-bit data bus in the future are reserved terminals (DATA4 to DATA7). That is, theseexternal connection terminals 7 function as the external terminals of amemory chip 3M. - Out of these external connection terminals, the power voltage supply terminal (Vcc) and the ground voltage supply terminals (Vss) are longer than the other
external connection terminals 7. This is aimed to prevent the malfunction of the semiconductor chips 3 by contacting the power voltage supply terminal (Vcc) and the ground voltage supply terminal (Vss1) to the terminals of a connector so as to supply power before signals are supplied to the semiconductor chips 3 through the otherexternal connection terminals 7 when theSIM card 1 is inserted into the connector of a portable telephone. - The
SIM card 1 of this embodiment has external terminals on the front side and the rear side. That is, theexternal connection terminals 7 of the IC chip 3I are arranged on the front side of the SIM card 1 (rear surface of thewiring board 2A) and theexternal terminals 7 of thememory chip 3M are arranged on the rear side (rear side of thewiring board 2B) of theSIM card 1. As will be described in detail hereinafter, the number of functions of the SIM card can be increased due to this structure of theSIM card 1. - As shown in
FIG. 3 , three semiconductor chips 3 are interposed between thewiring board 2A and thewiring board 2B. These semiconductor chips 3 are mounted on the top surface of thewiring board 2B and sealed with amold resin 4. The three semiconductor chips 3 are an IC chip 3I, acontroller chip 3C and amemory chip 3M made of silicon and having a thickness of 0.03 to 0.30 mm. - Integrated circuits such as a central processing unit, ROM (Read Only Memory), RAM (Random Access memory) and EEPROM (Electrically Erasable Programmable RO) are formed on the main surface of the IC chip 3I. Execution programs and crypto algorithms are stored in the ROM. The RAM functions as a memory for data processing and the EEPROM functions as a memory for storing data.
- A flash memory having a capacity of 32 MB to several GB is formed on the main surface of the
memory chip 3M. The flash memory mainly functions as a memory for storing user data. Integrated circuits for controlling the interfaces of the IC chip 3I and thememory chip 3M are formed on the main surface of thecontroller chip 3C. - Out of the above three semiconductor chips 3, the
memory chip 3M and thecontroller chip 3C are bonded to the top surface of thewiring board 2B and the IC chip 3I is bonded to the top surface of thememory chip 3M. These three semiconductor chips 3 are electrically connected toelectrodes 22 on the top surface of thewiring board 2B from the electrodes (not shown) of the semiconductor chips 3 bygold wires 9, and theelectrodes 22 on thewiring board 2B are electrically connected to the aboveexternal connection terminals 7 through via holes (not shown) formed in thewiring board 2B. That is, the three semiconductor chips 3 are electrically connected to theexternal connection terminals 7 through thegold wires 9, the electrodes of the semiconductor chips 3, the electrodes of thewiring board 2B and the via holes. - The
mold resin 4 for sealing the three semiconductor chips 3 is a thermosetting epoxy resin containing a quartz filler and has a thickness of about 0.45 mm. Thewiring board 2A is bonded to the top surface of themold resin 4 by the adhesive 8. Theabove adhesive 8 interposed between the top surface of themold resin 4 and thewiring board 2A is an epoxy resin-based non-conductive adhesive and has a thickness of about 0.03 mm. - Out of the above three semiconductor chips 3, the IC chip 3I formed on the
memory chip 3M is also electrically connected to the contact points 6 of thewiring board 2A. That is, the upper end portions of the loops of thegold wires 9 for connecting the IC chip 3I to thewiring board 2B are slightly exposed from the top surface of themold resin 4. The number ofgold wires 9 exposed from the top surface of themold resin 4 is, for example, five. Thegold wires 9 exposed from the top surface of themold resin 4 are coated with aconductive adhesive 10. Further, electrodes (not shown) connected to the respective five contact points (6 a, 6 b, 6 c, 6 e, 6 g) excluding the above non-connected terminals (NC) and viaholes 11 are formed in thewiring board 2A over theconductive adhesive 10. The fivegold wires 9 whose upper end portions are exposed from the top surface of themold resin 4 are electrically connected to the respective contact points (6 a, 6 b, 6 c, 6 e, 6 g) through theconductive adhesive 10, electrodes and viaholes 11. - The non-connection terminals (NC) may be used as antenna terminals for an RF interface or USB interface. By using the non-connected terminals (NC), the
SIM card 1 can have more functions. -
FIG. 4 is a perspective view of theSIM card 1 of this embodiment. As shown inFIG. 4 , the front side of theSIM card 1 is covered by thewiring board 2A, the rear side of theSIM card 1 is covered by thewiring board 2B, and themold resin 4 and the adhesive 8 are exposed to the side surfaces of theSIM card 1. As will be described hereinafter, the production time and the production cost of theSIM card 1 can be reduced by this structure. - A description is subsequently given of an example of the method for manufacturing the SIM card constituted as described above of this embodiment.
-
FIG. 5 is a plan view of a large-sized wiring board 12A used for the manufacture of an SIM card andFIG. 6 is a plan view of a large-sized wiring board 12B used for the manufacture of an SIM card. - The large-
sized wiring board 12A shown inFIG. 5 has a plurality of sets of the contact points (6 a to 6 h) of thewiring board 2A shown inFIG. 1 which are arranged in a matrix, and the area shown by a broken line in the figure is an area (unit) occupied by onewiring board 2A. The large-sized wiring board 12B shown inFIG. 6 has a plurality of sets of the 20external connection terminals 7 of thewiring board 2B shown inFIG. 2 which are arranged in a matrix, and the area shown by a broken line in the figure is an area (unit) occupied by onewiring board 2B. Although not shown, viaholes 11 and electrodes connected to the contact points (6 a, 6 b, 6 c, 6 e, 6 g) are formed in each unit of the large-sized wiring board 12A. Similarly, via holes andelectrodes 22 connected to theexternal connection terminals 7 are formed in each unit of the large-sized wiring board 12B. - To manufacture an SIM card, as shown in
FIG. 7 , three semiconductor chips 3 are first mounted on each unit of the large-sized wiring board 12B. The top surface of the large-sized wiring board 12B will become the top surface of thewiring board 2B on which the semiconductor chips 3 will be mounted. The rear surface of the large-sized wiring board 12B will become the rear surface of thewiring board 2B on which theexternal connection terminals 7 will be formed. - The
controller chip 3C and thememory chip 3M are bonded to the top surface of the large-sized wiring board 12B by pellets using an adhesive or an adhesive film (not shown), and the IC chip 3I is bonded to thememory chip 3M by pellets using an adhesive or an adhesive film (not shown). The reason why the IC chip 3I is formed on thememory chip 3M at this point is that thememory chip 3M is larger than the IC chip 3I and has a large area. If an IC chip 3I having a relatively small area is formed under thememory chip 3M, there will occur such inconvenience that the IC chip 3I cannot be connected by the gold wire. Therefore, in this embodiment, a chip having a relatively large surface area is arranged at a lower position and a chip having a relatively small surface area is formed above the chip. As for the arrangement of the IC chip 3I, the IC chip 3I is arranged such that its periphery does not project from the outer periphery of thememory chip 3M. That is, the IC chip 3I is arranged on the inner side of the outer periphery of thememory chip 3M. By arranging the IC chip 3I as described above, as shown inFIG. 3 , the degree of freedom of the area where thegold wire 9 is arranged can be increased. - Thereafter, as shown in
FIG. 8 , the three semiconductor chips 3 are connected to the respective electrodes (not shown) of the large-sized wiring board 12B by thegold wires 9 using a widely-known wire bonding apparatus. At this point, thegold wires 9 for connecting the electrodes of the large-sized wiring board 12B to the IC chip 3I are bonded such that the upper end portions of their loops become higher than the top surface (position shown by a one-dotted chain line in the figure) of themold resin 4 to be molded later. That is, the height of thegold wire 9 is set above the height of themold resin 4 with the top surface of thewiring board 12B as a standard. The gold wire (first wire) 9 for connecting the IC chip 3I to theelectrode 22 of thewiring board 12B is set higher than the gold wire (second wire) 9 for connecting thememory chip 3M to theelectrode 22 of thewiring board 12B. This is intended to prevent contact between thefirst wire 9 and thesecond wire 9. - Then, as shown in
FIG. 9 , the above large-sized wiring board 12B is placed in thecavity 21 of amold 20 consisting of anupper mold 20A and alower mold 20B. By doing this, the upper end portion of thegold wire 9 connected to the IC chip 3I is brought into close contact with the surface of theupper mold 20A by elastic deformation. Since thegold wire 9 is elastic and easily deforms, even when its upper end portion is pressed against theupper mold 20A, the contact portion between the IC chip 3I and thegold wire 9 is not damaged. - After a molten resin is injected into the
cavity 21 of themold 20 to mold themold resin 4, the large-sized wiring board 12B is taken out of the mold 20 (FIG. 10 ). Although the upper end portions of thegold wires 9 connected to the IC chip 3I become the same height as the top surface of themold resin 4 at this point, very thin resin flush burrs adhere to the surfaces of the upper end portions of thegold wires 9. - By removing the thin flush burrs covering the upper end portions of the
gold wires 9, the upper end portions of thegold wires 9 are exposed from the top surface of themold resin 4 to a certain extent. That is, thegold wires 9 are partially exposed from the top surface of themold resin 4. To remove the flush burrs, the top surface of themold resin 4 is vaporized by using a laser beam having a short wavelength, or is sputtered. Or, the top surface of themold resin 4 may be blasted. Further, a jet of high-pressure water may be applied from the end of a nozzle, or etching using a chemical for dissolving themold resin 4 may be employed. -
FIG. 11 is a plan view of the top surface of themold resin 4 after the flush burrs have been removed. As shown in the figure, the upper end portions of thegold wires 9 are exposed to positions corresponding to the contact points (6 a, 6 b, 6 c, 6 e, 6 g) of each unit. - As shown in
FIG. 12 , theconductive adhesive 10 is then applied to the top portions of thegold wires 9 exposed from the top surface of themold resin 4. The application of theconductive adhesive 10 is carried out by screen printing or potting, for example. Thenon-conductive adhesive 8 is applied to the area excluding the areas from which thegold wires 9 are exposed out of the top surface of themold resin 4. To simplify the application work of the adhesives, theconductive adhesive 10 may be applied to the area where thenon-conductive adhesive 8 will be applied and the top portions of thegold wires 9 at the same time. Preferably, the conductive adhesive 10 applied to the top portions of thegold wires 9 has such high elasticity that it can easily deform when the large-sized wiring board 12A is bonded to the top surface of themold resin 4 in the subsequent step. - In place of the above method, as shown in
FIG. 13 , anadhesive sheet 14 havingopenings 13 around thegold wires 9 may be bonded to the entire top surface of themold resin 4, and theconductive adhesive 10 may be applied to the top portions of thegold wires 9 before or after the above step. Alternately, an anisotropic conductive film having an adhesive coat on both sides may be bonded to the entire top surface of themold resin 4. Since electrodes connected to the via holes 11 are formed on one surface (opposed to the mold resin 4) of the large-sized wiring board 12A, when the anisotropic conductive film is bonded to the top surface of themold resin 4 and the large-sized wiring board 12A is placed on the anisotropic conductive film, only parts of the anisotropic conductive film at positions in contact with the electrodes becomes conductive, thereby making it possible to electrically connect thegold wires 9 to the electrodes. - Thereafter, as shown in
FIG. 14 , the large-sized wiring board 12A is placed on the top surface of themold resin 4 and bonded to themold resin 4 by the adhesive 8. Thereby, the contact points (6 a, 6 b, 6 c, 6 e, 6 g) are electrically connected to thegold wires 9 through the conductive adhesive 10 applied to the top portions of thegold wires 9, the electrodes of the large-sized wiring board 12A and the via holes 11. - Then, the large-
sized wiring board 12A, themold resin 4 and the large-sized wiring board 12B are cut along the outer circumferences of the units to obtain the SIM cards of this embodiment shown inFIGS. 1 to 4 . Since the oblique cutout 5 must be formed at one corner of theSIM card 1 and the other corners must be rounded as described above, by cutting the large-sized wiring boards mold resin 4 with a jet of high-pressure wafer from the end of the nozzle, cutting can be carried out simultaneously with the formation of the cutout 5 and the rounding of the corners. Water jet cutting and dicing are used in combination so that dicing is used to cut linear portions and water jet cutting is used to form the cutout 5 and round the corners. Since dicing cuts faster than water jet cutting, when water jet cutting and dicing are used in combination, the cutting time can be shortened as compared with a case where only water jet cutting is used. Since the linear portions can be cut at once by dicing when theSIM card 1 is formed by this manufacturing method, the production cost perSIM card 1 can be cut. - In this embodiment, the large-
sized wiring boards SIM card 1 is not limited to this and transfer molding in which eachSIM card 1 is sealed individually may be employed. - While the invention made by the inventors of the present invention has been described in detail based on the preferred embodiment, it is needless to say that the present invention is not limited to the above embodiment and may be modified without departing from the scope of the invention.
- For example, in this embodiment, the
SIM card 1 comprises thememory chip 3M, the IC chip 3I and thecontroller chip 3C. However, theSIM card 1 may be constituted such that the IC chip 3I and thecontroller chip 3C are integrated to one chip. - That is, as shown in
FIG. 15 , theSIM card 1 has a two-chip structure that a chip 31C including an IC chip and a controller chip is existent on thememory chip 3 M having a flash memory. Gold wires (first wires) 9 exposed from the top surface of themold resin 4 and gold wires (second wires) 9 not exposed from the top surface of the mold resin extend from the chip 31C. The abovefirst wires 9 are connected to the contact points 6 through theconductive adhesive 10 and the via holes 11 and to theexternal connection terminals 7 through theelectrodes 22 formed on thewiring board 2B. The abovesecond wires 9 are formed at a height lower than the abovefirst wires 9 and are connected to theexternal connection terminals 7 through theelectrodes 22 formed on thewiring board 2B. When theSIM card 1 has the above two-chip structure, the space of thecontroller chip 3C can be eliminated, which is effective for the microfabrication of theSIM card 1. A chip having another function or a flash memory chip can be mounted on the above space. In this case, it is possible to further increase the number of functions or the capacity of theSIM card 1. - As shown in
FIG. 16 , the present invention can be applied to a case where thememory chip 3M and the chip 31C including the IC chip and the controller chip are integrated to one chip to manufacture a chip 3MIC. As compared with the above two-chip structure, it is possible to further enhance the level of microfabrication and increase the number of functions or the capacity of theSIM card 1. Since the thickness of the chip can be reduced by the one-chip structure, the thickness of theSIM card 1 can be reduced. - In the above embodiment, a multi-function SIM card having memory card functions and SIM card functions has been described. The functions of the card are not limited to these functions. For example, the present invention can be applied to a card having various functions such as a card having only memory card functions, a card having only SIM card functions or a card including semiconductor chips having functions different from those of a memory card and an SIM card. For example, in this embodiment, a memorystic PRO as shown in
FIG. 2 is given as the interface of theSIM card 1 but the present invention is not limited to this and may be an interface terminal structure according to purpose, such as a multi-media card, SD card or USB. - The types and number of semiconductor chips to be mounted on the wiring board and a combination of these semiconductor chips may be changed according to the functions of a card. For instance, in a card having only memory card functions, a system can be constructed with one or more memory chips having a nonvolatile memory from and to which data can be electrically erased or written and an interface controller chip for controlling memory interface operation for the memory chip(s). The number of external connection terminals on the wiring board for mounting semiconductor chips can be changed according to required functions. When the number of external connection terminals is small, all the external connection terminals can be arranged in a row.
- The structure and manufacturing method of the present invention in which a wiring board over a sealing resin is connected to semiconductor chips by wires exposed from the top surface of the sealing resin can be applied to semiconductor packages other than cards.
- Since the SIM card of the present invention can have various functions by changing the types and a combination of semiconductor chips to be mounted on the wiring board, it can be used not only as a multi-function SIM card but also as other composite function card and communication card.
Claims (11)
1-7. (canceled)
8. A method for manufacturing a semiconductor device, comprising the steps of:
(a) preparing a first wiring board having a plurality of external connection terminals on one side and a second wiring board having a plurality of contact points on one side;
(b) mounting semiconductor chips over the other side of the first wiring board and electrically connecting the first wiring board to the semiconductor chips by wires;
(c) placing the first wiring board in a mold in such a manner that the other side faces up and bringing the upper end portions of the loops of the wires into contact with the top of the cavity of the mold;
(d) injecting a resin into the cavity to seal the semiconductor chips and the wires with the sealing resin and exposing the upper end portions of the loops of the wires from the top surface of the sealing resin; and
(e) bonding the other side of the second wiring board to the top surface of the sealing resin to electrically connect the wires exposed from the top surface of the sealing resin to the second wiring board.
9. The method for manufacturing a semiconductor device according to claim 8 , further comprising a step of applying a conductive adhesive to the wires exposed from the top surface of the sealing resin after the step (d) and before the step (e).
10. The method for manufacturing a semiconductor device according to claim 8 , further comprising a step of removing flush burrs which adhere to the wires exposed from the top surface of the sealing resin after the step (d) and before the step (e).
11. The method for manufacturing a semiconductor device according to claim 10 , wherein the flush burrs are removed by laser sputtering the top surface of the sealing resin.
12. The method for manufacturing a semiconductor device according to claim 8 , further comprising a step of cutting the first wiring board, the second wiring board and the sealing resin after the step (e).
13. The method for manufacturing a semiconductor device according to claim 12 , wherein the first wiring board, the second wiring board and the sealing resin are cut by a water jet system.
14. The method for manufacturing a semiconductor device according to claim 12 , wherein the first wiring board, the second wiring board and the sealing resin are cut by a water jet system and a dicing system.
15. The method for manufacturing a semiconductor device according to claim 12 , wherein the first wiring board, the second wiring board and the sealing resin after the cutting step have outside dimensions based on Mini-UICC standards.
16. The method for manufacturing a semiconductor device according to claim 8 , wherein the semiconductor chips include:
a first semiconductor chip having an electrically erasable and writable non-volatile memory;
a second semiconductor chip having an interface controller for controlling memory interface operation for the non-volatile memory; and
a third semiconductor chip having an IC card microcomputer for carrying out processing based on an operation command given from the interface controller, and the upper end portions of the loops of the plurality of wires for electrically connecting the first wiring board to the third semiconductor chip are exposed from the top surface of the sealing resin and electrically connected to the second wiring board.
17-21. (canceled)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/037,588 US20080153205A1 (en) | 2005-03-11 | 2008-02-26 | Semiconductor device and a method for manufacturing the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2005068362A JP2006253430A (en) | 2005-03-11 | 2005-03-11 | Semiconductor device and its manufacturing method |
JP2005-068362 | 2005-03-11 | ||
US11/371,929 US7352588B2 (en) | 2005-03-11 | 2006-03-10 | Semiconductor device and a method for manufacturing the same |
US12/037,588 US20080153205A1 (en) | 2005-03-11 | 2008-02-26 | Semiconductor device and a method for manufacturing the same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/371,929 Division US7352588B2 (en) | 2005-03-11 | 2006-03-10 | Semiconductor device and a method for manufacturing the same |
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US20080153205A1 true US20080153205A1 (en) | 2008-06-26 |
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US11/371,929 Active US7352588B2 (en) | 2005-03-11 | 2006-03-10 | Semiconductor device and a method for manufacturing the same |
US12/037,588 Abandoned US20080153205A1 (en) | 2005-03-11 | 2008-02-26 | Semiconductor device and a method for manufacturing the same |
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US11/371,929 Active US7352588B2 (en) | 2005-03-11 | 2006-03-10 | Semiconductor device and a method for manufacturing the same |
Country Status (5)
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US (2) | US7352588B2 (en) |
JP (1) | JP2006253430A (en) |
KR (1) | KR20060097661A (en) |
CN (1) | CN1832166A (en) |
TW (1) | TW200731140A (en) |
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US20130116009A1 (en) * | 2011-11-07 | 2013-05-09 | Sheldon Terry Schwandt | Universal integrated circuit card apparatus and related methods |
USD701864S1 (en) | 2012-04-23 | 2014-04-01 | Blackberry Limited | UICC apparatus |
USD702240S1 (en) | 2012-04-13 | 2014-04-08 | Blackberry Limited | UICC apparatus |
US8936199B2 (en) | 2012-04-13 | 2015-01-20 | Blackberry Limited | UICC apparatus and related methods |
DE102021213437A1 (en) | 2021-11-29 | 2023-06-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Circuit arrangement and method for forming a circuit arrangement |
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JP2006253430A (en) * | 2005-03-11 | 2006-09-21 | Renesas Technology Corp | Semiconductor device and its manufacturing method |
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EP2608114A1 (en) * | 2011-12-19 | 2013-06-26 | Gemalto SA | Method for producing a mould with an integrated circuit chip protected by a pad |
USD729808S1 (en) * | 2013-03-13 | 2015-05-19 | Nagrastar Llc | Smart card interface |
USD758372S1 (en) | 2013-03-13 | 2016-06-07 | Nagrastar Llc | Smart card interface |
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USD736212S1 (en) * | 2014-07-01 | 2015-08-11 | Samsung Electronics Co., Ltd. | Memory card |
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TWI708533B (en) * | 2019-07-02 | 2020-10-21 | 華泰電子股份有限公司 | Semiconductor package and manufacturing method thereof |
CN112242388A (en) * | 2019-07-18 | 2021-01-19 | 华泰电子股份有限公司 | Semiconductor package and fabrication method thereof |
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Also Published As
Publication number | Publication date |
---|---|
JP2006253430A (en) | 2006-09-21 |
US20060205280A1 (en) | 2006-09-14 |
CN1832166A (en) | 2006-09-13 |
TW200731140A (en) | 2007-08-16 |
KR20060097661A (en) | 2006-09-14 |
US7352588B2 (en) | 2008-04-01 |
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