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WO2003038748A1 - Procede d'impression au cadre rotatif pour produire une antenne - Google Patents

Procede d'impression au cadre rotatif pour produire une antenne Download PDF

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Publication number
WO2003038748A1
WO2003038748A1 PCT/NL2002/000688 NL0200688W WO03038748A1 WO 2003038748 A1 WO2003038748 A1 WO 2003038748A1 NL 0200688 W NL0200688 W NL 0200688W WO 03038748 A1 WO03038748 A1 WO 03038748A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
electrically conductive
screen printing
antennas
metal
Prior art date
Application number
PCT/NL2002/000688
Other languages
English (en)
Inventor
Peter Leerkamp
Stephanus Gerardus Johannes Blankenborg
Original Assignee
Stork Prints B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stork Prints B.V. filed Critical Stork Prints B.V.
Publication of WO2003038748A1 publication Critical patent/WO2003038748A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • 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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1216—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by screen printing or stencil printing
    • H05K3/1225—Screens or stencils; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/006—Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles

Definitions

  • the present invention relates to a method for manufacturing antennas made from electrically conductive metal on a substrate by means of screen printing.
  • a method of this type is known, for example, from WO 01/04834 as a step in manufacturing admission tickets.
  • a number of tickets which provide admission to a monitored zone are manufactured from a web of paper which is unwound from a stock reel.
  • An electronic module for each ticket is applied to the paper web.
  • the electronic module comprises an integrated circuit and an antenna.
  • the antenna is made from an ink, which comprises silver powder in a polymerizable matrix, by means of screen printing. Paper as starting material for the substrate has been selected with a view to costs.
  • the paper web has the function of an electrically insulating substrate for the antenna.
  • the ink is then allowed to dry and is subjected to a thermal treatment in order to obtain an antenna.
  • the thermal treatment comprises a laminating treatment at elevated pressure and temperature.
  • the known method also comprises a number of subsequent steps, including the application of connections for making contact with the integrated circuit, positioning the said circuit and shielding the electronic module fabricated in this way using protective layers .
  • French patent 2 769 440 has also disclosed a method for manufacturing an antenna, which is usually helical in shape.
  • Antennas produced in this way are used, for example, as transponders in electronic memory cards and the like which can be read without contact, or hybrid cards, which can be read either without contact or with contact via fixed contact points. Examples include telephone cards, authorization badges, bank cards and other so-called smart cards for other purposes.
  • information is exchanged between the memory chip of a card of this type and a reader by remote electromagnetic coupling between a first antenna, which is provided on the card, and a second antenna, which is provided in the reading/writing device.
  • an electrically conductive ink is likewise applied to an insulating substrate by means of screen printing.
  • a conductive ink of this type comprises, for example, a metal particle content of between 60-95% in a polymeric matrix and a suitable solvent.
  • an integrated circuit can be applied by screen printing at the same time as the antenna.
  • an electrically conductive ink is used, which is laden with silver, copper or gold for the purpose of screen printing the antenna onto a substrate, for example a polymeric substrate.
  • US-A 6,137,444 and DE-Al 19 511 300 also use silver-based conductive screen printing inks for manufacturing antennas of this type.
  • WO 01/410161 has disclosed the screen printing of an antenna made from an ink containing silver powder onto a paper substrate as a substep in manufacturing smart cards, each smart card being printed and assembled separately.
  • preforms of antennas which have been deposited by means of screen printing often in the form of coils comprising a plurality of turns, can be reinforced with a suitable metal by means of electroplating.
  • antennas of this type are known, for example, from US patent 3,907,565, in which the antennas are etched from a foil, for example from a copper foil.
  • the copper antennas formed in this way can, for example, be plated with tin in order to improve the soldering properties and the resistance to corrosion.
  • Coating with tin in order to connect the antenna turn to a semiconductor chip is also proposed in US-A 5,809,633.
  • Antennas of this type which can transmit and receive signals, should have a good conductivity, since no energy may be lost. A loss of energy means a reduction in the potential range.
  • the thickness of the antenna is often limited by the application, for example the total thickness of the card, which has to satisfy certain standards.
  • the solvent used has to be removed by drying after the screen printing, which requires relatively high temperatures.
  • Many of the substrates used which are made from an organic polymer material are unable to withstand such a temperature, however, with the result that the physical properties and/or the appearance of the substrate are adversely affected.
  • the conductivity of the antennas manufactured in this way leaves something to be desired, despite the aftertreatments used, such as a laminating step under certain circumstances at elevated temperature and elevated pressure.
  • the method for manufacturing antennas made from electrically conductive metal on a substrate by means of screen printing comprises the steps of: unwinding a substrate web made of a flexible substrate material from a stock reel as the substrate which is to be printed, and using a rotary screen printing device to apply molten electrically conductive material to the substrate web in the form of antennas, the electrically conductive material being selected from an electrically conductive metal or metal compound.
  • Rotary screen printing has the advantage of being a continuous process in which a higher mass production rate can be obtained than with ordinary (i.e. flat) screen printing, which is a batch or semi-continuous (intermittent) process.
  • This process also gives a high level of fineness, which is important with regard to the dimensions of the antenna, such as the width and thickness of the antenna turns and the distance between them.
  • the substrate is flexible, so that it can be unwound from a stock reel.
  • “Skin-Kabelsatzen” of this type are used to provide motor vehicles with electricity and comprise a plastic support, separate conductive tracks (which are not connected to one another) with a relatively great thickness and a covering of plastic.
  • Each support for example made from polyurethane, is produced separately in a mould by casting or foaming, and is then printed on, for example by screen printing a molten metal or metal alloy in order to form the tracks. Then, the covering, which is produced in the same way as the carrier, is applied to the latter.
  • the conductive material with a high conductivity is preferably selected from metallic indium, metallic tin, metallic lead, bismuth, oxides thereof and the alloys and alloyed oxides, including indium tin oxide (ITO).
  • ITO indium tin oxide
  • Tin is advantageously used on account of its high conductivity and good resistance to corrosion, which are, for example, greater than those of silver. Tin is also a good fastening agent.
  • tin has the advantage of a high elongation and flexibility at the thicknesses which are used for antennas, so that the substrate with the antennas applied to it can be wound up if desired.
  • an antenna made from tin can be used in highly flexible cards.
  • Indium has a relatively low melting point, approximately 160°C, which is advantageous with a view to energy costs in the method according to the invention.
  • the flexible substrate which is used in the method according to the invention may be a paper or polymer substrate. It is advantageous to use paper, which reduces production costs compared to the use of polymer substrates. If necessary, the substrate may be of a fire-retardant type.
  • the antennas are applied to the substrate (in rows and/or columns) by means of rotary screen printing. Then, the substrate with the antennas on it is processed further, for example is wound up if possible or divided into substrate sections which comprise one or more antennas, and packaged. During further assembly, for example at the manufacturer of smart cards, etc, the antenna can be fixed to the correct position on a carrier.
  • the method comprises an additional step of applying an insulator over the metal which has previously been deposited. It is preferable for this insulator to be applied in a subsequent (rotary) screen printing station.
  • the present invention also relates to a method for manufacturing a card with a printed circuit, comprising the steps of screen printing a molten metal or metal alloy onto a substrate in order to form an electrically conductive image, positioning at least one electronic component on the image, while the electrically conductive material is still liquid, and allowing the assembly formed to cool.
  • the image is a path or track on the support, for example made from plastic, of a printed circuit
  • a suitable temperature control it is possible, if desired using a suitable temperature control, to delay the solidification of the electrically conductive material, so that it is possible to position the electronic components on the track which has been applied while the conductive material is still liquid or in any event has not yet completely solidified.
  • these components are then fixed to the support.
  • the image functions partially as a conductor and partially as a fixing means. Examples of components of this type include resistors, batteries, capacitors, ICs etc. Fixed connection points can be secured to the ends of an antenna in the same way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Parts Printed On Printed Circuit Boards (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne un procédé pour produire des antennes constituées d'un métal électro-conducteur se trouvant sur un substrat, au moyen d'une impression au cadre. Ce procédé consiste à dérouler d'une bobine d'alimentation une bande de substrat à imprimer, constituée d'un matériau de substrat souple, puis à mettre en oeuvre un dispositif d'impression au cadre rotatif afin d'appliquer un matériau électro-conducteur fondu sur la bande de substrat, en vue de former des antennes. Ledit matériau électro-conducteur est choisi parmi un métal électro-conducteur ou un composé métallique électro-conducteur.
PCT/NL2002/000688 2001-10-31 2002-10-29 Procede d'impression au cadre rotatif pour produire une antenne WO2003038748A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1019264 2001-10-31
NL1019264A NL1019264C2 (nl) 2001-10-31 2001-10-31 Zeefdrukwerkwijze voor het vervaardigen van een elektrisch geleidende afbeelding op een substraat.

Publications (1)

Publication Number Publication Date
WO2003038748A1 true WO2003038748A1 (fr) 2003-05-08

Family

ID=19774233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2002/000688 WO2003038748A1 (fr) 2001-10-31 2002-10-29 Procede d'impression au cadre rotatif pour produire une antenne

Country Status (2)

Country Link
NL (1) NL1019264C2 (fr)
WO (1) WO2003038748A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7411500B2 (en) 2005-09-14 2008-08-12 3M Innovative Properties Company Methods of monitoring items or material from manufacturing processes
US7417550B2 (en) 2004-12-20 2008-08-26 3M Innovative Properties Company Environmentally friendly radio frequency identification (RFID) labels and methods of using such labels
US8998099B2 (en) 2010-12-16 2015-04-07 3M Innovative Properties Company Transparent micropatterned RFID antenna and articles incorporating same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403649A (en) * 1989-12-21 1995-04-04 Monsanto Company Fabricating metal articles from printed images
WO2001004834A1 (fr) * 1999-07-07 2001-01-18 A S K Ticket d'acces sans contact et son procede de fabrication
DE19947376A1 (de) * 1999-10-01 2001-05-03 Claus Singmann Verfahren zur Herstellung von Skin-Kabelsätzen
WO2001041061A1 (fr) * 1999-11-29 2001-06-07 Ask S.A. Procede de fabrication d'une carte a puce hybride contact-sans contact avec un support d'antenne en materiau fibreux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403649A (en) * 1989-12-21 1995-04-04 Monsanto Company Fabricating metal articles from printed images
WO2001004834A1 (fr) * 1999-07-07 2001-01-18 A S K Ticket d'acces sans contact et son procede de fabrication
DE19947376A1 (de) * 1999-10-01 2001-05-03 Claus Singmann Verfahren zur Herstellung von Skin-Kabelsätzen
WO2001041061A1 (fr) * 1999-11-29 2001-06-07 Ask S.A. Procede de fabrication d'une carte a puce hybride contact-sans contact avec un support d'antenne en materiau fibreux

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7417550B2 (en) 2004-12-20 2008-08-26 3M Innovative Properties Company Environmentally friendly radio frequency identification (RFID) labels and methods of using such labels
US7411500B2 (en) 2005-09-14 2008-08-12 3M Innovative Properties Company Methods of monitoring items or material from manufacturing processes
US8998099B2 (en) 2010-12-16 2015-04-07 3M Innovative Properties Company Transparent micropatterned RFID antenna and articles incorporating same

Also Published As

Publication number Publication date
NL1019264C2 (nl) 2003-05-02

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