WO2022153631A1 - カード型媒体、およびカード型媒体の製造方法 - Google Patents
カード型媒体、およびカード型媒体の製造方法 Download PDFInfo
- Publication number
- WO2022153631A1 WO2022153631A1 PCT/JP2021/038130 JP2021038130W WO2022153631A1 WO 2022153631 A1 WO2022153631 A1 WO 2022153631A1 JP 2021038130 W JP2021038130 W JP 2021038130W WO 2022153631 A1 WO2022153631 A1 WO 2022153631A1
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- WIPO (PCT)
- Prior art keywords
- card
- conductive
- circuit board
- joining
- intermediate spacer
- Prior art date
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Images
Classifications
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- 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
- G06K19/07745—Mounting details of integrated circuit chips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/305—Associated digital information
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/313—Fingerprints
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- 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
- G06K19/0716—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 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
- G06K19/0718—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 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor the sensor being of the biometric kind, e.g. fingerprint sensors
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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
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- G—PHYSICS
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- 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
- G06K19/07722—Physical layout of the record carrier the record carrier being multilayered, e.g. laminated sheets
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- G—PHYSICS
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- 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
- G06K19/07743—External electrical contacts
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/183—Components mounted in and supported by recessed areas of the printed circuit board
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
- H05K1/186—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit manufactured by mounting on or connecting to patterned circuits before or during embedding
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/04—Assemblies of printed circuits
- H05K2201/049—PCB for one component, e.g. for mounting onto mother PCB
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2036—Permanent spacer or stand-off in a printed circuit or printed circuit assembly
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/04—Soldering or other types of metallurgic bonding
- H05K2203/047—Soldering with different solders, e.g. two different solders on two sides of the PCB
Definitions
- the present invention relates to a card-type medium and a method for manufacturing the card-type medium.
- the present application claims priority based on Japanese Patent Application No. 2021-004389 filed in Japan on January 14, 2021, and the contents thereof are incorporated herein by reference.
- IC card Integrated Circuit
- the IC card has a circuit board and elements such as an IC module and an antenna mounted on the circuit board embedded in the card body.
- Patent Document 1 discloses a configuration including a secure element and a fingerprint processing unit connected to a flexible circuit board, and a contact pad electrically connected to the secure element.
- the contact pad is arranged so as to be exposed on the surface (front surface) of the card body.
- the contact pad is housed inside an opening formed on the surface of the card body.
- Exposed parts such as contact terminals and fingerprint sensors that are partially exposed on the surface of the card may be attached to the circuit board embedded in the card body via an intermediate spacer in order to adjust the height. be.
- the placement accuracy of the exposed parts may be lowered due to the relative positions of the exposed parts and the intermediate spacers being displaced.
- the present invention has been made in view of the above circumstances, and manufactures a card-type medium having a structure capable of improving the placement accuracy of exposed parts attached to a circuit board via an intermediate spacer, and such a card-type medium. Provide a method.
- the card-type medium includes a card body, an exposed component housed inside an opening formed on the surface of the card body and partially exposed on the surface, and the card body.
- a circuit board embedded therein and to which the exposed component is attached, the exposed component includes a first exposed component that is attached to the circuit board via an intermediate spacer, the first exposed component and the intermediate spacer. Is joined by the first conductive joining material, the circuit board and the intermediate spacer are joined by the second conductive joining material, and the joining formation temperature of the first conductive joining material and the second conductivity The joint formation temperature of the joint material is different from each other.
- the method for producing a card-type medium includes the production of the card-type medium including a structure in which the bonding formation temperature of the first conductive bonding material is higher than the bonding formation temperature of the second conductive bonding material.
- the method is a step of joining the first exposed component and the intermediate spacer with the first conductive bonding material, and the second step of joining the intermediate spacer and the circuit board joined to the first exposed component. Includes a step of joining with a conductive bonding material.
- the method for producing a card-type medium according to an aspect of the present invention includes the production of the card-type medium including a structure in which the bond formation temperature of the second conductive bonding material is higher than the bonding formation temperature of the first conductive bonding material.
- the method is a step of joining the circuit board and the intermediate spacer with the second conductive bonding material, and the intermediate spacer and the first exposed component joined to the circuit board with the first conductive material. Includes a step of joining with a joining material.
- FIG. 5 is an external view of the IC card according to the embodiment of the present invention as viewed from the front side. It is sectional drawing of the IC card in embodiment of this invention. It is sectional drawing which shows a part of the procedure of the process of joining exposed parts in embodiment of this invention. It is sectional drawing of the IC card in the 1st modification of embodiment of this invention. FIG. 5 is a cross-sectional view showing a part of a procedure of a step of joining exposed parts in a second modification of the embodiment of the present invention.
- the joint formation temperature of the joint material means the minimum temperature at which a joint can be obtained by the joint material.
- the bonding formation temperature is approximately synonymous with the melting point.
- the bonding formation temperature is a temperature determined by the physical properties of the constituent resin and the conductive particles.
- the joint formation temperature of the joint material is determined, for example, by conducting various tests on a card-type medium in which different temperatures are applied to the joint material and examining that the electrical joint and the mechanical joint satisfy the predetermined requirements. be able to.
- a test based on JIS X 635-1 (test method for identification card-Part 1: general characteristics) 5.8 dynamic bending force and 5.9 dynamic torsional force, And tests based on IEC 60749-25 (semiconductor device-mechanical test and weather resistance test method-Part 25: temperature cycle) are performed.
- FIG. 1 is an external view of the IC card according to the embodiment of the present invention as viewed from the front side.
- FIG. 2 is a cross-sectional view of an IC card according to an embodiment of the present invention.
- the IC card 1 of the present embodiment shown in FIGS. 1 and 2 is a dual interface IC card including a contact terminal 22 which is a contact interface and an antenna 50 (see FIG. 2) which is a non-contact interface.
- the IC card 1 of the present embodiment has a biometric authentication function by the fingerprint sensor 21.
- the IC card 1 (card type medium) includes a card body 10, an exposed component 20, an inclusion component 30, a circuit board 40, and an antenna 50.
- the exposed component 20 includes a fingerprint sensor 21 and a contact terminal 22.
- the card body 10 has a plate shape and is formed in a rectangular shape when viewed from the card thickness direction Dt (see FIG. 2) orthogonal to the surface 10f.
- the card thickness direction Dt is a direction perpendicular to the front surface 10f and the back surface 10g of the card body 10.
- the surface 10f is an end face located on the upper side in FIG. 2 of the end faces of the card body 10 in the card thickness direction Dt.
- the back surface 10 g is an end face located on the lower side in FIG. 2 of the end faces of the card body 10 in the card thickness direction Dt.
- the "front surface 10f side” means the upper side in FIG. 2
- the "back surface 10g side” means the lower side in FIG.
- the card body 10 has a thickness of Dt in the card thickness direction of, for example, about 0.5 to 1.0 mm.
- the thickness of the card body 10 is 0.76 mm.
- the card body 10 is configured by laminating a plurality of sheet-shaped card base materials 401 and 402 in the card thickness direction Dt.
- the card base material 401 arranged on the surface 10f side of the card body 10 is formed with an opening 410 for accommodating the exposed parts 20.
- two openings 410 are formed.
- a fingerprint sensor 21 and a contact terminal 22 are housed in each opening 410.
- the opening 410 is formed so as to penetrate the card base material 401 in the card thickness direction Dt.
- the card base material 401 is formed of a conductive metal-based material such as stainless steel or a titanium alloy.
- the plate thickness in the card thickness direction Dt is, for example, 100 ⁇ m or more and 500 ⁇ m or less.
- the card base material 401 may be formed by using a plastic base material.
- a recess 420 is formed in the back surface 401 g of the base material facing the back surface 10 g side in the card thickness direction Dt.
- the concave portion 420 is formed by being recessed from the back surface 401 g of the base material to the front surface 10f side in the card thickness direction Dt.
- the inclusion component 30 is housed in the recess 420.
- the openings 410 and the recesses 420 are formed by laser machining or cutting.
- the card base material 402 arranged on the back surface 10 g side of the card body 10 is, for example, a polyester-based material such as amorphous polyester, a vinyl chloride-based material such as PVC (polyvinyl chloride), a polycarbonate-based material, PET-G ( It is formed by using an insulating plastic base material such as polyethylene terephthalate copolymer).
- Exterior resin layers 403 and 404 are formed on the surface of the card base material 401 on the front surface 10f side and the surface of the card base material 402 on the back surface 10g side, respectively.
- the exterior resin layer 403 forms the surface 10f of the card body 10.
- the exterior resin layer 403 forms the back surface 10 g of the card body 10.
- the exterior resin layer 403 covers the entire surface of the card base material 401 on the surface 10f side except for the opening 410.
- the exterior resin layer 404 covers the entire surface of the card base material 402 on the back surface 10 g side.
- the exterior resin layers 403 and 404 are formed by, for example, a laminate (film).
- the card base material 401 and the card base material 402 are integrated by a converting process using a hot press laminate, an adhesive, or the like.
- the card base material 401 and the card base material 402 may be integrated by a cold press laminating process using a two-component curable resin, a room temperature curable resin, or a UV curable resin.
- the ferrite layer 405 is arranged between the card base material 401 and the card base material 402.
- the circuit board 40 is embedded in the card body 10.
- the circuit board 40 is located between the card base material 401 and the card base material 402 in the card thickness direction Dt. More specifically, the circuit board 40 is sandwiched between the ferrite layer 405 and the card base material 402 in the card thickness direction Dt.
- the circuit board 40 is arranged inside the outer edge of the card body 10 when viewed from the card thickness direction Dt.
- the circuit board 40 has a rectangular outer shape when viewed from the card thickness direction Dt.
- the thickness of the circuit board 40 in the card thickness direction Dt is, for example, 15 ⁇ m or more and 50 ⁇ m or less.
- the circuit board 40 is arranged in a plane orthogonal to the card thickness direction Dt along the surface on the front surface 10f side of the card base material 402 arranged on the back surface 10g side of the card body 10. ..
- the circuit board 40 is composed of a flexible circuit board.
- the circuit board 40 has a base base material 40a having an insulating material such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyimide (PI), and glass epoxy.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PC polycarbonate
- PI polyimide
- glass epoxy glass epoxy
- the wiring pattern is arranged on the surface of the base base material 40a on the surface 10f side.
- the inclusion part 30 is embedded in the card body 10.
- the IC card 1 has an IC chip 31 as an inclusion component 30.
- the IC chip 31 is joined to the substrate surface 40f facing the surface 10f side of the circuit board 40.
- the IC chip 31 is housed in the recess 420.
- a gap is provided between the IC chip 31 and the inner surface of the recess 420.
- the IC chip 31 is joined to the surface (board surface 40f) of the circuit board 40 on the surface 10f side by the conductive bonding material 450a.
- the conductive bonding material 450a is, for example, an anisotropic solder having a bonding forming temperature of 180 ° C. or lower.
- the anisotropic solder refers to a material in which conductive solder particles are dispersed in a thermoplastic resin.
- the IC chip 31 is a so-called secure IC microcomputer, and typically has a fingerprint authentication function by a fingerprint sensor 21 and a communication function with the outside via a contact terminal 22 or an antenna 50.
- a known configuration having a contact type communication function and a non-contact type communication function can be used.
- the IC chip 31 is formed in a rectangular shape when viewed from the card thickness direction Dt.
- the IC chip 31 is electrically connected to the fingerprint sensor 21, the contact terminal 22, and the antenna 50 via a wiring pattern formed on the circuit board 40. That is, the circuit board 40 includes a fingerprint sensor wiring portion that electrically connects the IC chip 31 and the fingerprint sensor 21, a contact terminal wiring portion that electrically connects the IC chip 31 and the contact terminal 22, and the IC chip 31. It has an antenna wiring portion that electrically connects the antenna 50 and the antenna 50.
- the exposed component 20 is housed inside an opening 410 formed on the surface 10f of the card body 10, and a part of the exposed component 20 is exposed on the surface 10f.
- the exposed component 20 includes the fingerprint sensor 21 (first exposed component) and the contact terminal 22 (second exposed component).
- the fingerprint sensor 21 and the contact terminal 22 are mounted on the substrate surface 40f of the circuit board 40. That is, the exposed component 20 is attached to the circuit board 40.
- the fingerprint sensor 21 is a first exposed component attached to the circuit board 40 via the intermediate spacer 471.
- the fingerprint sensor 21 is formed in a rectangular shape when viewed from the card thickness direction Dt.
- the fingerprint sensor 21 has a configuration in which a protective film is provided so as to cover a large number of electrodes. As shown in FIG. 1, the fingerprint sensor 21 is arranged on one side (RH side) of the long side direction D1 of the card body 10 with respect to the central portion of the surface 10f of the card body 10.
- the intermediate spacer 471 is formed with connection electrodes (not shown) made of copper foil or the like on the front and back surfaces of an insulating base base material such as glass epoxy.
- the connection electrodes on the front surface and the back surface of the intermediate spacer 471 are electrically connected by through holes or vias formed by copper plating or the like.
- the intermediate spacer 471 is electrically connected to the circuit board 40 and the fingerprint sensor 21 via connection electrodes, respectively.
- the fingerprint sensor 21 can be selected by selecting the height of the intermediate spacer 471.
- the surface position of the contact terminal 22 in the card thickness direction Dt can be matched with the surface position of the contact terminal 22 in the card thickness direction Dt.
- the fingerprint sensor 21 and the intermediate spacer 471 are joined by the first conductive joining material 451a.
- the circuit board 40 and the intermediate spacer 471 are joined by a second conductive bonding material 451b.
- the joint formation temperature of the first conductive joint material 451a and the joint formation temperature of the second conductive joint material 451b are different from each other. In the present embodiment, the joint formation temperature of the first conductive joint material 451a is higher than the joint formation temperature of the second conductive joint material 451b.
- the first conductive bonding material 451a is, for example, an Ag paste having a bonding forming temperature of 220 ° C.
- the second conductive bonding material 451b is, for example, an anisotropic solder having a bonding forming temperature of 180 ° C. or lower.
- the second conductive bonding material 451b is the same material as the conductive bonding material 450a for bonding the IC chip 31.
- the joint formation temperature of the first conductive bonding material 451a is lower than the heat resistant temperature of the fingerprint sensor 21 and the intermediate spacer 471 to be bonded.
- a material having a bonding formation temperature of 250 ° C. or lower is selected as the first conductive bonding material 451a.
- the joint formation temperature of the first conductive bonding material 451a is preferably 200 ° C. or higher and 250 ° C. or lower.
- the joint formation temperature of the second conductive bonding material 451b is lower than the heat resistant temperature of the circuit board 40.
- the joint formation temperature of the second conductive bonding material 451b is, for example, 120 ° C. or higher and 180 ° C.
- the joint formation temperature of the second conductive bonding material 451b is preferably 120 ° C. or higher and 170 ° C. or lower.
- the difference between the joint formation temperature of the first conductive joint material 451a and the joint formation temperature of the second conductive joint material 451b is, for example, 20 ° C. or more.
- the difference between the joint formation temperature of the first conductive joint material 451a and the joint formation temperature of the second conductive joint material 451b is preferably 30 ° C. or higher.
- the card dimensions are determined by the standard. For example, when the IC card 1 is a credit card, the thickness of the card body 10 is 0.76 mm. Therefore, the thickness of the first conductive joining material 451a and the thickness of the second conductive joining material 451b also have an appropriate range. In the present embodiment, the thickness of the first conductive joining material 451a is preferably 5 ⁇ m or more and 100 ⁇ m or less, and the thickness of the second conductive joining material 451b is 5 ⁇ m or more and 100 ⁇ m or less. preferable.
- the contact terminal 22 is a second exposed component that is directly joined to the circuit board 40.
- the contact terminal 22 is formed in a rectangular shape when viewed from the card thickness direction Dt.
- the contact terminal 22 comes into contact with an external contact terminal provided in a contact-type external device such as an automated teller machine and can be electrically connected.
- a contact terminal 22 having a conductor pattern formed on the surface of an insulating base material such as glass epoxy or polyimide (PI) by etching or the like and plated with nickel, palladium, gold or the like is used.
- the contact terminal 22 is arranged on the other side (LH side) of the long side direction D1 along the surface 10f of the card body 10 with respect to the central portion of the surface 10f of the card body 10.
- the contact terminal 22 is joined to the surface of the circuit board 40 on the surface 10f side (board surface 40f) by the conductive bonding material 450b.
- the conductive bonding material 450b is the same material as the second conductive bonding material 451b, and is, for example, an anisotropic solder having a bonding forming temperature of 180 ° C. or lower.
- the fingerprint sensor 21, the contact terminal 22, and the intermediate spacer 471 are arranged with a gap C between them and the inner peripheral surface of the opening 410.
- the gap C is designed so as not to cause an electrical short circuit between the exposed component 20, the intermediate spacer 471, each conductive joining material, and the card body 10. ..
- the antenna 50 is formed in a rectangular shape along the peripheral edge of the circuit board 40 when viewed from the card thickness direction Dt.
- the antenna 50 is formed with one or two or more turns along the peripheral edge of the circuit board 40.
- the antenna 50 is formed, for example, as a part of a wiring pattern formed on the circuit board 40.
- the antenna 50 may be separate from the circuit board 40.
- the antenna 50 can be formed, for example, by arranging a metal plate, a metal foil, a metal wire, or the like formed in a predetermined antenna shape.
- the wiring patterns of the antenna 50 and the circuit board 40 are joined by soldering, welding, pressure welding, or the like.
- FIG. 3 is a cross-sectional view showing a part of the procedure of the step of joining the fingerprint sensor 21 as the first exposed component.
- the method for manufacturing the IC card 1 according to the present embodiment includes a first joining step of joining the fingerprint sensor 21 and the intermediate spacer 471 with the first conductive bonding material 451a, and an intermediate spacer 471 and a circuit joined to the fingerprint sensor 21.
- the second joining step of joining the substrate 40 with the second conductive joining material 451b is included.
- the intermediate spacer 471 and the circuit board 40 are joined with the second conductive joining material 451b.
- the joining process is performed.
- the joined body in which the fingerprint sensor 21 and the intermediate spacer 471 are joined is brought close to the circuit board 40 from above, and the intermediate spacer 471 is joined to the substrate surface 40f.
- the intermediate spacer 471 and the substrate surface 40f are joined by using the second conductive joining material 451b.
- the intermediate spacer 471 and the substrate surface 40f are brought into contact with each other via the second conductive bonding material 451b that can be joined by heating, and then the second conductive bonding material 451b is cured to form the intermediate spacer 471.
- the substrate surface 40f is joined.
- the intermediate spacer 471 and the circuit board 40 are joined by the second conductive joining material 451b, it is necessary to apply heat so that the second conductive joining material 451b can be joined and formed. Therefore, conventionally, at least a part of the first conductive bonding material 451a for bonding the fingerprint sensor 21 and the intermediate spacer 471 is melted by the heat applied when the intermediate spacer 471 and the circuit board 40 are bonded. The fingerprint sensor 21 and the intermediate spacer 471 may be misaligned. Therefore, the fingerprint sensor 21 may be displaced from the circuit board 40.
- the fingerprint sensor 21 as the first exposed component and the intermediate spacer 471 are bonded by the first conductive bonding material 451a, and the circuit board 40 and the intermediate spacer 471 are bonded to each other.
- the second conductive bonding material 451b Is bonded by the second conductive bonding material 451b, and the bonding forming temperature of the first conductive bonding material 451a and the bonding forming temperature of the second conductive bonding material 451b are different from each other. Therefore, first, the pre-process of joining with the conductive joining material having the higher joining forming temperature among the first conductive joining material 451a and the second conductive joining material 451b is performed, and then the one having the lower joining forming temperature is performed.
- the post-process of joining with the conductive joining material of is performed.
- the post-process can be performed at a temperature lower than the temperature required for joining using the conductive bonding material in the pre-process. Therefore, when heat is applied in the post-process, it is possible to prevent the conductive bonding material used for bonding in the pre-process from melting. Therefore, even if heat is applied in the post-process, it is possible to prevent the members joined in the pre-process from loosening or coming off. That is, in the post-process using the conductive bonding material having the lower bonding forming temperature, the conductive bonding material having the lower bonding forming temperature is in a state where the bonding can be formed, and the conductivity is higher than the bonding forming temperature.
- the joining of the members joined in the previous step does not loosen or come off, and the joining can be performed in the subsequent step.
- the post-process can be performed while ensuring the joining by the pre-process, and even when the intermediate spacer 471 is used, the relative position deviation between the exposed component 20 and the intermediate spacer 471 can be suppressed. Therefore, according to the present embodiment, the placement accuracy of the exposed component 20 attached to the circuit board 40 via the intermediate spacer 471 can be improved. Further, since the arrangement accuracy of the exposed component 20 can be improved, it is possible to prevent the exposed component 20 from interfering with the inner surface of the opening 410.
- the joint formation temperature of the first conductive joint material 451a is higher than the joint formation temperature of the second conductive joint material 451b. Therefore, as described above, after performing the step (pre-step) of joining the fingerprint sensor 21 as the first exposed component and the intermediate spacer 471 with the first conductive bonding material 451a, the intermediate bonded to the fingerprint sensor 21. By performing the step (post-process) of joining the spacer 471 and the circuit board 40 with the second conductive bonding material 451b, the intermediate spacer is prevented from loosening or coming off from the fingerprint sensor 21 and the intermediate spacer 471. The 471 and the circuit board 40 can be joined by the second conductive bonding material 451b.
- the fingerprint sensor 21 can be easily mounted on the circuit board 40.
- the difference between the joint formation temperature of the first conductive joint material 451a and the joint formation temperature of the second conductive joint material 451b is, for example, 20 ° C. or more.
- the difference between the joint formation temperature of the first conductive joint material 451a and the joint formation temperature of the second conductive joint material 451b is preferably 30 ° C. or higher.
- the exposed component 20 includes a contact terminal 22 as a second exposed component directly bonded to the circuit board 40. That is, in the present embodiment, a part of the exposed component 20 is attached to the circuit board 40 without using the intermediate spacer 471. Therefore, the total number of parts and the total man-hours at the time of manufacturing can be reduced as compared with the case where the intermediate spacer 471 is used for all the exposed parts 20.
- the first exposed component includes the fingerprint sensor 21, and the second exposed component includes the contact terminal 22.
- the fingerprint sensor 21 tends to be relatively smaller in thickness than the contact terminal 22. Therefore, in order to match the height of the fingerprint sensor 21 with the height of the contact terminal 22, an intermediate spacer 471 is likely to be required.
- the fingerprint sensor 21 can be prevented from being displaced even by using the intermediate spacer 471, so that the fingerprint sensor 21 can be arranged with high accuracy. Therefore, when the first exposed component is the fingerprint sensor 21, the effect of improving the placement accuracy of the exposed component 20 described above can be obtained more usefully.
- the contact terminal 22 tends to be relatively thicker than the fingerprint sensor 21. Therefore, even if the contact terminal 22 is attached to the circuit board 40 without the intermediate spacer 471, it is easy to match the height with the fingerprint sensor 21 attached to the circuit board 40 via the intermediate spacer 471. Therefore, it is not necessary to use the intermediate spacer 471 for the contact terminal 22, and it is possible to suppress an increase in the number of parts of the IC card 1.
- each exposed component 20 can be arranged with high accuracy while suppressing an increase in the number of components of the IC card 1.
- FIG. 4 is a cross-sectional view of the IC card 2 in the first modification.
- the fingerprint sensor 21 is bonded to the circuit board 40 via the intermediate spacer 471, and the contact terminal 22 is directly bonded to the circuit board 40, but the bonding mode of the exposed parts is limited to this. I can't.
- the contact terminal 23 may also be attached to the circuit board 40 via the intermediate spacer 472. That is, the exposed component 20 does not have to include the second exposed component that is directly bonded to the circuit board 40.
- the contact terminal 23 is the first exposed component.
- Other configurations of the contact terminal 23 are the same as those of the contact terminal 22.
- the intermediate spacer 472 is similar to, for example, the intermediate spacer 471 used in the fingerprint sensor 21.
- the contact terminal 23 is joined to the intermediate spacer 472 by the first conductive bonding material 452a. Further, the intermediate spacer 472 is joined to the circuit board 40 by the second conductive bonding material 452b.
- the joint formation temperature of the first conductive joint material 452a is higher than the joint formation temperature of the second conductive joint material 452b. Therefore, by using the same joining method as the joining method of the fingerprint sensor 21 described in the above-described embodiment, the placement accuracy of the contact terminal 23 attached to the circuit board 40 via the intermediate spacer 472 can be improved.
- the first conductive joining material 452a is, for example, the same material as the first conductive joining material 451a that joins the fingerprint sensor 21 and the intermediate spacer 471.
- the second conductive joining material 452b is, for example, the same material as the second conductive joining material 451b that joins the intermediate spacer 471 and the circuit board 40.
- the first conductive bonding material 452a may be made of a material different from that of the first conductive bonding material 451a, or may have a different bonding formation temperature from the first conductive bonding material 451a.
- the second conductive bonding material 452b may be made of a material different from that of the second conductive bonding material 451b, or may have a different bonding formation temperature from the second conductive bonding material 451b.
- FIG. 5 is a cross-sectional view showing a part of the procedure of the step of joining the fingerprint sensor 21 as the first exposed component in the second modification.
- the joint formation temperature of the first conductive joint material 451a is higher than the joint formation temperature of the second conductive joint material 451b.
- the present invention is not limited to this, and the joint formation temperature of the second conductive joint material may be higher than the joint formation temperature of the first conductive joint material.
- the method of manufacturing the IC card according to the second modification of the present embodiment includes a step of joining the circuit board 40 and the intermediate spacer 471 with the second conductive bonding material 453b, and the circuit board 40. Includes a step of joining the intermediate spacer 471 bonded to the above and the fingerprint sensor 21 as the first exposed component with the first conductive bonding material 453a. That is, after the step (previous step) of joining the intermediate spacer 471 and the circuit board 40 with the second conductive joining material 453b is performed, the fingerprint sensor 21 and the intermediate spacer 471 are joined with the first conductive joining material 453a. The joining process (post-process) is performed.
- the joint formation temperature of the second conductive joint material 453b is higher than the joint formation temperature of the first conductive joint material 453a.
- the first conductive joining material 453a can be selected in the same manner as the second conductive joining material 451b described above.
- the second conductive joining material 453b can be selected in the same manner as the first conductive joining material 451a described above.
- the first conductive bonding material 453a is, for example, an anisotropic solder having a bonding forming temperature of 180 ° C. or lower
- the second conductive bonding material 453b is, for example, an Ag paste having a bonding forming temperature of 220 ° C.
- the joint formation temperature of the second conductive joint material 453b is higher than the joint formation temperature of the first conductive joint material 453a. Therefore, when joining the fingerprint sensor 21 and the intermediate spacer 471 using the first conductive joining material 453a in the subsequent step, heat is applied to bring the first conductive joining material 453a into a state in which the first conductive joining material 453a can be joined. Also, it is possible to prevent the intermediate spacer 471 and the circuit board 40 from loosening or coming off. Therefore, it is possible to prevent the fingerprint sensor 21 from being displaced with respect to the circuit board 40, and it is possible to improve the placement accuracy of the fingerprint sensor 21.
- the components to be mounted as the inclusion component 30 and the exposed component 20 are not limited to the IC chip 31, the fingerprint sensor 21, and the contact terminal 22, and other components may be mounted as appropriate.
- the exposed component 20 is provided with two types of the fingerprint sensor 21 and the contact terminal 22, but the present invention is not limited to this.
- the type and number of the exposed parts 20 and the contained parts 30 can be changed as appropriate.
- the card-type medium the IC card 1 used as a credit card has been illustrated, but its form and use are not limited in any way.
- the combination of the bonding formation temperatures of each conductive bonding material is not particularly limited as long as it is suitable for the combination of manufacturing processes.
- the joint formation temperature of the first conductive joint material 451a is higher than the joint formation temperature of the second conductive joint material 451b, and the joint formation temperature of the second conductive joint material 452b is high.
- the configuration may be higher than the joint formation temperature of the first conductive bonding material 452a.
- the fingerprint sensor 21 is joined to the circuit board 40 by the joining method shown in FIG. 3, and the contact terminal 23 is joined to the circuit board 40 by the joining method shown in FIG.
- the conductive joining material that directly joins the exposed component and the circuit board and the conductive joining material that directly joins the contained component and the circuit board are not limited to the above-described embodiment.
- the conductive joining material that directly joins an exposed component or the like to a circuit board is the same material as the conductive joining material having a higher joining forming temperature among the first conductive joining material and the second conductive joining material. It may be a material different from both the 1st conductive bonding material and the 2nd conductive bonding material.
- the conductive bonding material having a higher bonding forming temperature is not limited to Ag paste, and may be, for example, another ACF (Anisotropic Condition Film) or ACP (Anisotropic Conductive Paste).
- the ACF and ACP are, for example, film-like or paste-like materials in which conductive particles are dispersed in a thermoplastic resin.
- the first conductive joining material and the second conductive joining material may be solder having only an alloy.
- the conductive bonding material having a higher joinable temperature may be a solder having a relatively high melting point
- the conductive bonding material having a lower bondable temperature may be a solder having a relatively low melting point such as low temperature solder.
- 1, 2, ... IC card (card type medium), 10 ... card body, 10f ... surface, 20 ... exposed parts, 21 ... fingerprint sensor (first exposed parts), 22 ... contact terminals (second exposed parts), 23 ... Contact terminal (first exposed component), 40 ... circuit board, 410 ... opening, 451a, 452a, 453a ... first conductive bonding material, 451b, 452b, 453b ... second conductive bonding material, 471,472 ... intermediate spacer
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- Credit Cards Or The Like (AREA)
Abstract
Description
本願は、2021年1月14日に日本に出願された特願2021-004389号に基づき優先権を主張し、その内容をここに援用する。
図4は、第1変形例におけるICカード2の断面図である。
上記実施形態では、指紋センサ21が、回路基板40に中間スペーサ471を介して接合されており、接触端子22が、回路基板40に直接接合されているが、露出部品の接合態様はこれに限られない。図4に示すように、接触端子23も中間スペーサ472を介して回路基板40に取り付けられる構成であってもよい。つまり、露出部品20は、回路基板40に直接接合される第2露出部品を含まなくてもよい。本変形例では、接触端子23は、第1露出部品である。接触端子23のその他の構成は、接触端子22と同じである。中間スペーサ472は、例えば、指紋センサ21に用いられる中間スペーサ471と同様である。
図5は、第2変形例における、第1露出部品としての指紋センサ21を接合する工程の手順の一部を示す断面図である。
上記実施形態では、第1導電性接合材451aの接合形成温度が、第2導電性接合材451bの接合形成温度よりも高い。しかしながら、これに限られず、第2導電性接合材の接合形成温度が、第1導電性接合材の接合形成温度よりも高い構成としてもよい。
Claims (7)
- カード本体と、
前記カード本体の表面に形成された開口の内側に収容され、前記表面に一部が露出して配置される露出部品と、
前記カード本体内に埋設され、前記露出部品が取り付けられる回路基板と、を備え、 前記露出部品は、中間スペーサを介して前記回路基板に取り付けられる第1露出部品を含み、
前記第1露出部品と前記中間スペーサとは、第1導電性接合材により接合され、
前記回路基板と前記中間スペーサとは、第2導電性接合材により接合され、
前記第1導電性接合材の接合形成温度と前記第2導電性接合材の接合形成温度とは、互いに異なる、
カード型媒体。 - 前記第1導電性接合材の接合形成温度は、前記第2導電性接合材の接合形成温度よりも高い、
請求項1に記載のカード型媒体。 - 前記第2導電性接合材の接合形成温度は、前記第1導電性接合材の接合形成温度よりも高い、
請求項1に記載のカード型媒体。 - 前記露出部品は、前記回路基板に直接接合される第2露出部品を含む、
請求項1~3のいずれか1項に記載のカード型媒体。 - 前記第1露出部品は、指紋センサを含み、
前記第2露出部品は、接触端子を含む、
請求項4に記載のカード型媒体。 - 前記第1露出部品と前記中間スペーサとを前記第1導電性接合材で接合する工程と、
前記第1露出部品に接合された前記中間スペーサと前記回路基板とを前記第2導電性接合材で接合する工程と、を含む、
請求項2に記載のカード型媒体の製造方法。 - 前記回路基板と前記中間スペーサとを前記第2導電性接合材で接合する工程と、
前記回路基板に接合された前記中間スペーサと前記第1露出部品とを前記第1導電性接合材で接合する工程と、を含む、
請求項3に記載のカード型媒体の製造方法。
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CN202180080277.8A CN116529734A (zh) | 2021-01-14 | 2021-10-14 | 卡型介质以及卡型介质的制造方法 |
EP21919522.9A EP4280104A1 (en) | 2021-01-14 | 2021-10-14 | Card-type medium and card-type medium manufacturing method |
JP2022575082A JPWO2022153631A1 (ja) | 2021-01-14 | 2021-10-14 | |
US18/221,279 US20230359857A1 (en) | 2021-01-14 | 2023-07-12 | Card-type medium and card-type medium manufacturing method |
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