WO2000060656A1 - Procede de fabrication de dispositifs electroniques portables a circuit integre protege par un film pulverise - Google Patents
Procede de fabrication de dispositifs electroniques portables a circuit integre protege par un film pulverise Download PDFInfo
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- WO2000060656A1 WO2000060656A1 PCT/FR2000/000793 FR0000793W WO0060656A1 WO 2000060656 A1 WO2000060656 A1 WO 2000060656A1 FR 0000793 W FR0000793 W FR 0000793W WO 0060656 A1 WO0060656 A1 WO 0060656A1
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- Prior art keywords
- support
- chip
- manufacturing
- chips
- protective film
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims abstract description 47
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Classifications
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- 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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- 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
- G06K19/07745—Mounting details of integrated circuit chips
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
- H01L21/561—Batch processing
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- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3121—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed a substrate forming part of the encapsulation
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
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- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
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- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
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- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
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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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- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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- H01L2924/12—Passive devices, e.g. 2 terminal devices
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Definitions
- the present invention relates to the manufacture of a portable electronic device, comprising at least one integrated circuit chip embedded in a support and electrically connected to interface elements.
- the present invention relates more particularly to a manufacturing method comprising a step of protecting the integrated circuit chip and its connections.
- Portable electronic devices constitute, for example, smart cards, with or without contact, integrated circuit modules or electronic labels.
- Smart cards with or without contact, are intended for carrying out various operations such as, for example, banking operations, telephone communications, various identification operations, or operations of the teleticketing type.
- ISO 7810 corresponds to a standard format card 85 mm long, 54 mm wide and 0.76 mm thick.
- the present invention preferably relates to contactless electronic devices operating with an antenna which makes it possible to exchange information towards the outside by means of electromagnetic coupling.
- FIG. 1 A conventional method for manufacturing a contactless smart card module is illustrated in FIG. 1.
- Such a method consists in bonding an integrated circuit chip 10 by placing its active face with its contact pads 11 upwards, and by bonding its opposite face to a dielectric support sheet 15.
- An antenna 18 is produced on the dielectric support 15 in a conductive material.
- the antenna can for example be formed by screen printing of conductive ink. Its shape does not matter and its length depends on the desired use. It can for example represent a spiral or any other motif.
- Connection wires 17 connect the contact pads 11 of the chip 10 to the antenna 18.
- the chip can also be glued to a dielectric support and connected to connection pads defined on said support.
- the module thus obtained can subsequently be connected by welding or bonding to a wire antenna, engraved or deposited by screen printing.
- a protection or encapsulation step then protects the module defined by the chip 10 and the welded connection wires 17.
- the step of protecting the chip 10 and the connection wires 17 can be carried out directly on the dielectric film 15.
- Such a barrier 25 can be made of polymer, such as epoxy, silicone or polyester. It surrounds the chip 10 and can be deposited on the dielectric film 15 by screen printing or by a distribution process.
- This barrier 25 can also consist of a stamped metal frame bonded to the dielectric film 15 around the chip 10.
- a barrier 25 surrounding the chip 10 facilitates the removal of the protective resin 20 but does not necessarily make it possible to dispense with the essential milling step when a drop of too large resin has been deposited. Indeed, the drop of resin can interfere with the insertion of the micromodule formed by the chip
- Milling represents a stressful operation for the integrated circuit chip, and the height of the resin cannot be completely optimized without risking touching the connection wires.
- milling is an additional step in the manufacturing process and has a significant cost.
- FIG. 2 Such a protection technique is illustrated in FIG. 2.
- An integrated circuit chip 10 is bonded by placing its active face with its contact pads 11 upwards, and by bonding its opposite face directly to a contact grid 18 disposed on a dielectric support sheet 15.
- Connection wells 16 are formed in the dielectric sheet 15 in order to allow connection wires 17 to connect the contact pads 11 of the chip 10 to the contact pads of the grid 18.
- An adhesive tape 35 covered with a protective tape 36 and provided with openings is applied to the dielectric support 15 so as to constitute a mask which covers the dielectric support 15 and leaves the chips 10 and their connection wires 17 free.
- a varnish is then deposited by spraying on the whole of the ribbon 36 and of the chips 10 so as to form a fine protection 30.
- the protective tape 36 is then removed so as to uncover the adhesive tape 35 which will facilitate the insertion of the micromodule.
- the varnish 30 covers the chip 10, its connection wires 17 and the contact pads 18 of the grid, as well as part of the dielectric 15 to stop at the adhesive tape 35.
- the varnish used advantageously consists of a polymerizable varnish based on silicone and of a viscosity suitable for its deposition by spraying. It is preferable to avoid UV-curing varnishes as part of this process. Thanks to such a method, the milling step is completely eliminated and the thickness of the protection is minimized. This results in a decrease in manufacturing costs.
- the object of the present invention is to overcome the drawbacks of the prior art.
- the present invention provides a method of manufacturing an integrated circuit module comprising a step of protecting the chip and the connection wires by spraying a thin layer of varnish or resin.
- the present invention more particularly relates to a method of manufacturing a portable electronic device with integrated circuit, characterized in that it comprises a step consisting in spraying a protective material directly onto a dielectric support film carrying a plurality of glued chips and connected to connection pads by wire cabling so as to protect each chip and its connection wires.
- the protective material constitutes a film conforming to the shape of the assembly formed by the chip and the connection wires.
- the protective film has a thickness of between 10 and 20 ⁇ m on the top of the loops of the connection wires.
- the spraying of the protective material is discontinuous, chip by chip. According to another embodiment, the spraying of the protective material is continuous on the chips and the dielectric support.
- the method according to the invention further comprises a step of individualizing the chips by cutting the dielectric support.
- the individualization of the chips causes the protective film between the chips to break.
- at least part of the shape of the protective film is fixed by the chosen geometry of the spray nozzle and / or by the predetermined distance between the nozzle and the dielectric support.
- the protective material is dried by exposure to ultraviolet light.
- the present invention also relates to an electronic module comprising a chip transferred to a dielectric support and connected to a communication interface, characterized in that it comprises a protective film conforming to the shape of the assembly formed by the chip and the connection wires, at least a part of the periphery of the protective film extending to plumb with the edge of the dielectric support.
- the invention further relates to a portable electronic device of the smart card type comprising an electronic module according to the invention.
- the manufacturing method according to the invention has the advantage of depositing protection for the chip and its wires at high speed and minimized thickness. Indeed, a single step is necessary to obtain protection with a reproducible geometry and thickness without the use of a mask.
- the method according to the invention has the advantage of avoiding any contact between the spray nozzle and the chip support. Any risk of damage to the connection or to the surface of the chip is thus avoided.
- the manufacturing method according to the invention also has the advantage of being simple and of improving productivity gains.
- FIG. 1, already described is a diagram in cross section illustrating a traditional method of manufacturing a smart card
- - Figure 2, already described is a cross-sectional diagram illustrating a known method of protecting a chip and its connection wires
- FIG. 3 illustrates a cross-sectional view of a series of chips bonded to a dielectric support
- FIG. 4 schematically illustrates the spraying of the protective material according to a first embodiment of the method of the present invention
- FIG. 5 illustrates a cross-sectional view of a series of protected chips according to the first embodiment of the method of the present invention
- FIG. 1 is a diagram in cross section illustrating a traditional method of manufacturing a smart card
- - Figure 2 already described is a cross-sectional diagram illustrating a known method of protecting a chip and its connection wires
- FIG. 3 illustrates a cross-sectional view of a series of chips bonded to a dielectric support
- FIG. 4 schematically illustrates the spraying of the protective material according to a first embodiment of the
- FIG. 6 schematically illustrates the spraying of the protective material according to a second embodiment of the method of the present invention
- - Figure 7 illustrates a cross-sectional view of a series of protected chips according to the second embodiment of the method of the present invention
- FIG. 8 illustrates a top view of a series of protected chips according to the second embodiment of the method of the present invention.
- a plurality of integrated circuit chips 10 are bonded to a dielectric support 15 and respectively connected to a plurality of connection pads 18 by wire wiring 17.
- the chips 10 are connected to antennas 18, which corresponds to a preferred embodiment.
- connection wires 17 are bare, without any protection.
- Figures 4 and 5 illustrate a first embodiment of the method according to the invention.
- FIG. 4 illustrates the step of spraying a protective material 50 on the chips 10 and on their connection wires 17.
- the spraying is carried out discontinuously, ie chip by chip, without spraying of material 50 on the support 15 between the chips 10.
- the support 15 carrying the bonded and connected chips 10 advantageously has indexes in order to allow identification by a device controlling the movement of the dielectric support 15 and / or of the nozzle 60, as well as the start-up of the spray nozzle 60.
- duration and the spray pressure make it possible to control the thickness of the protective material 50 deposited.
- Spraying a thin layer of material will lead to the formation of a deposit of protective material 51 which matches the shape of the assembly formed by the chip 10 and the connection wires 17.
- FIG. 5 illustrates the chips 10 obtained after spraying the protective material 51.
- the sprayed material 50 is, for example, constituted by a resin or an insulating varnish.
- the deposited protective material 51 is then dried by adding heat or by exposure to ultraviolet, for example.
- This drying advantageously makes it possible to produce a protective film 51 of the entire micromodule defined by the chip 10 and the connection wires 17 welded to the contact pads 18.
- the resin used as a protective material will advantageously consist of a resin cationic ultraviolet activatable and having a viscosity of 1200 CPS.
- a resin is sold by the company DELO under the reference 4552.
- the protective film 51 advantageously has a thickness of less than 40 ⁇ m, and preferably less than 20 ⁇ m on the top of the loops formed by the wires. connection 17. If necessary, the process allows much greater film thicknesses, for example 60 ⁇ m, but to the detriment of the production rate.
- the connected and protected chips 10 can then be individualized by cutting the dielectric support 15 in the intervals between each chip 10, so as to then be inserted in a card body or transferred to any electronic circuit for which they are intended.
- Figures 6 to 8 illustrate a second embodiment of the method according to the invention.
- the spraying is carried out continuously, that is to say without stopping the spray nozzle 60.
- the protective material 50 then covers the chips 10 and the connection wires 17 as well as the dielectric support 15 in the intervals between the chips 10.
- the chips 10 are bonded to the dielectric support 15 in several parallel rows (two rows are illustrated in FIG. 8 which is a top view). It is then possible to use two spray nozzles 60 in order to deposit two protective films 51 in continuous parallel strips. This embodiment advantageously makes it possible to increase the rate of spraying, and consequently to save time in the manufacturing process.
- the thickness and the width of the strip of protective material 51 sprayed on the support 15 are fixed by several parameters predetermined empirically by a person skilled in the art. In particular, the geometry of the nozzle 60, the difference between the latter and the support 15, the running speed of the support 15 relative to the spray nozzle 60, are parameters to be set.
- the protective material 51 is then dried by adding heat or by exposure to ultraviolet, for example. This drying results in the formation of a protective film on the assemblies formed by the chips 10 and the connection wires 17 on the dielectric support 15.
- Such a manufacturing method makes it possible to obtain an integrated circuit module comprising a protective film covering the chip and its connection wires, the periphery of said film extending as far as the base of the cut dielectric support.
- connection pads located for example on the back of the dielectric support are then connected to an antenna, for example wired, unless the dielectric already carries a contact or contactless communication interface.
- the assembly constituted by the module and the antenna is then placed in a portable card body such as a smart card body by any known method such as lamination, molding, etc.
- the principle of the invention is kept in the case where the chip is carried on a metallic film rather than on a dielectric film or on a support consisting of a metallic film fixed to a dielectric film.
- the pulverized material has a small thickness, it is obvious that its surface substantially reproduces the relief offered by the chip and its connections.
- the module has two opposite sides on which the resin extends down to the base of the support, and two remaining opposite sides on which the resin can present a slope towards the periphery until reaching the surface of the support.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Theoretical Computer Science (AREA)
- Credit Cards Or The Like (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU36625/00A AU3662500A (en) | 1999-04-02 | 2000-03-30 | Method for producing portable electronic devices having an integrated circuit which is protected by a pulverized film |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9904193A FR2791812B1 (fr) | 1999-04-02 | 1999-04-02 | Procede de fabrication de dispositifs electroniques portables a circuit integre protege par un film pulverise |
FR99/04193 | 1999-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000060656A1 true WO2000060656A1 (fr) | 2000-10-12 |
Family
ID=9543994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/000793 WO2000060656A1 (fr) | 1999-04-02 | 2000-03-30 | Procede de fabrication de dispositifs electroniques portables a circuit integre protege par un film pulverise |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3662500A (fr) |
FR (1) | FR2791812B1 (fr) |
WO (1) | WO2000060656A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2831991B1 (fr) * | 2001-11-07 | 2005-02-18 | Gemplus Card Int | Encapsulation localisee d'une connexion pour objet portable intelligent souple |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1450689A (en) * | 1973-09-27 | 1976-09-22 | Int Standard Electric Corp | Circuit ar'ngements |
US4674175A (en) * | 1985-04-02 | 1987-06-23 | Eta Sa Fabrique D'ebauches | Process for manufacturing electronic modules for microcircuit cards |
US4701236A (en) * | 1985-04-12 | 1987-10-20 | U.S. Philips Corporation | Method of manufacturing an electronic identification card |
US5832600A (en) * | 1995-06-06 | 1998-11-10 | Seiko Epson Corporation | Method of mounting electronic parts |
-
1999
- 1999-04-02 FR FR9904193A patent/FR2791812B1/fr not_active Expired - Fee Related
-
2000
- 2000-03-30 WO PCT/FR2000/000793 patent/WO2000060656A1/fr active Application Filing
- 2000-03-30 AU AU36625/00A patent/AU3662500A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1450689A (en) * | 1973-09-27 | 1976-09-22 | Int Standard Electric Corp | Circuit ar'ngements |
US4674175A (en) * | 1985-04-02 | 1987-06-23 | Eta Sa Fabrique D'ebauches | Process for manufacturing electronic modules for microcircuit cards |
US4701236A (en) * | 1985-04-12 | 1987-10-20 | U.S. Philips Corporation | Method of manufacturing an electronic identification card |
US5832600A (en) * | 1995-06-06 | 1998-11-10 | Seiko Epson Corporation | Method of mounting electronic parts |
Also Published As
Publication number | Publication date |
---|---|
FR2791812A1 (fr) | 2000-10-06 |
FR2791812B1 (fr) | 2002-01-25 |
AU3662500A (en) | 2000-10-23 |
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