WO2005009092A1 - Structure de pistes conductrices flexible et procede de fabrication et d'utilisation de celle-ci - Google Patents

Structure de pistes conductrices flexible et procede de fabrication et d'utilisation de celle-ci Download PDF

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Publication number
WO2005009092A1
WO2005009092A1 PCT/AT2004/000261 AT2004000261W WO2005009092A1 WO 2005009092 A1 WO2005009092 A1 WO 2005009092A1 AT 2004000261 W AT2004000261 W AT 2004000261W WO 2005009092 A1 WO2005009092 A1 WO 2005009092A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
thickness
electrically conductive
range
thread
Prior art date
Application number
PCT/AT2004/000261
Other languages
German (de)
English (en)
Inventor
Martha Maly-Schreiber
Adam Harding Whitehead
Wolfgang John
Original Assignee
Funktionswerkstoffe Forschungs- Und Entwicklungs Gmbh
I & T Innovation Technologie Entwicklungs- Und Holding Ag
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 Funktionswerkstoffe Forschungs- Und Entwicklungs Gmbh, I & T Innovation Technologie Entwicklungs- Und Holding Ag filed Critical Funktionswerkstoffe Forschungs- Und Entwicklungs Gmbh
Publication of WO2005009092A1 publication Critical patent/WO2005009092A1/fr

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Classifications

    • 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
    • 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
    • H05K1/03—Use of materials for the substrate
    • H05K1/038—Textiles
    • 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
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/0278—Polymeric fibers
    • 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
    • H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
    • H05K2201/0275—Fibers and reinforcement materials
    • H05K2201/029—Woven fibrous reinforcement or textile
    • 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
    • H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
    • H05K2203/0703—Plating
    • H05K2203/0709—Catalytic ink or adhesive for electroless plating
    • 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
    • H05K3/18—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 precipitation techniques to apply the conductive material
    • H05K3/181—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 precipitation techniques to apply the conductive material by electroless plating
    • H05K3/182—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 precipitation techniques to apply the conductive material by electroless plating characterised by the patterning method

Definitions

  • the invention relates to a flexible conductor track structure, consisting of an electrically non-conductive, essentially flat substrate with partial electrically conductive coating, and also to a method for producing such a structure, wherein an electrically non-conductive, essentially flat substrate is partially coated with noble metal. Germination activated and then the areas activated in this way are coated in an electrically conductive manner, and advantageous uses of such structures. Structures of the type mentioned and also their production in the manner described are known for example from EP 256 395 A or also DE 196 24 071 A and are used, for example, for the production of printed circuits, membrane keyboards, switch mats and the like. Like. Used, wherein the conductor tracks subsequently generated by electrically conductive coating are defined by the partial activation in the form of patterns.
  • the electrically conductive wires which are relatively inflexible compared to the other tissue environment, must also be carefully insulated so that, for example, a crumpling of the garment during wear cannot lead to short circuits.
  • the object of the present invention is to improve a flexible interconnect structure of the type mentioned at the outset in such a way that the disadvantages mentioned of the known structures of this type are avoided and that in particular the manufacture can be simplified and highly flexible but nevertheless robust interconnect structures can be provided.
  • the substrate consists of a three-dimensional textile-like fabric made of electrically non-conductive threads with a greater thickness than the thread thickness, and in that the partially electrically conductive coating adheres to the threads and that Tissue penetrates at least in regions up to at least part of the thickness.
  • the substrate is only partially electrically conductively coated, and its thickness (relative to the fabric thickness) can be varied via the manner of producing or applying this coating, which is described in more detail below.
  • the electrically conductive coating can only reach a few thread thicknesses deep into the fabric or penetrate it entirely.
  • the partial electrically conductive coating is applied to both sides of the fabric, preferably in a different structure, and preferably through-plated through in certain areas.
  • conductor tracks (possibly also different) can be formed on both sides of the fabric, which are only contacted by the fabric at desired locations.
  • This contact can be made either by means of correspondingly thick coating webs on both sides, which are touching the inside of the fabric, or - in a further preferred embodiment of the invention - can be implemented in such a way that the coatings on both sides of the fabric are spaced apart on the inside and for through-contacting in areas separate contact elements penetrating the tissue, such as electrically conductive eyelets, seams, push buttons or the like, are provided.
  • the textile-like fabric used for the substrate can consist of threads of a polymer from the following group: polyester, polyamide, polyvinyl derivatives, polyurethane, polypropylene and acrylonitrile-butadiene-styrene copolymer (ABS) or natural fibers or a mixed fabric, wherein the thread thickness is preferably in the range from 20 to 80 ⁇ m.
  • the electrically conductive coating in the area of the provided conductor tracks consists of a metal from the group: Cu, Ni, Ag, Au, or their alloys or layer combinations.
  • the layer thickness is preferably in the range of 0.01 to 10 microns.
  • Such conductor track structures are highly flexible and yet robust and are ideally suited for a wide variety of uses - according to the invention, preferably as a current conducting structure between at least one power source and a consumer in or on clothing or textile surfaces in the home, in advertising or in decoration.
  • so-called “smart fabrics” for supplying energy or operating electronic devices installed in clothing items can be realized, or textiles that can be used as curtains or fabrics with light displays realized by LEDs or the like, for example.
  • a fabric made of electrically non-conductive threads three-dimensionally with a greater thickness than the thread thickness is used as the substrate, the fabric after preferably chemical roughening
  • the surface of the thread is selectively provided on one side with an activator paste with a defined viscosity, the activator paste is pressed into the tissue with the aid of air pressure to the intended coating depth, the partially three-dimensionally activated tissue is dried, and the partially three-dimensionally activated and dried tissue is electrically conductively coated in the activated area.
  • the activator paste contains organometallic compounds of elements of the 1st or 8th subgroup of the periodic table and of olefins, ⁇ , ⁇ -unsaturated carbonyl compounds, crown ethers or nitriles, dissolved or finely dispersed, embedded in a matrix made of paint-typical binders and solvents, and is preferably applied in a layer thickness in the range from 10 to 50 ⁇ m, particularly preferably 20 to 30 ⁇ m.
  • FIGS. 4 and 5 are top views of conductor track structures designed according to the invention on flat substrates.
  • Fig. 6 is a schematic section along the line VI-VI in Fig. 5. It is known that the metal deposition on non-conductive surfaces, in particular surfaces of plastics, from chemically reductive metallizing baths by ionic or on the surfaces to be coated in previous process steps colloidally fixed noble metal nuclei can be catalyzed. In order to produce an adherent coating, these surfaces generally have to be roughened beforehand.
  • the amount of activator deposited in the screen printing process on the fabric surface can be controlled by a suitable choice of the emulsion layer thickness of the printing screen, the mesh size of the screen fabric used and the viscosity of the activation solution.
  • the activator solution is sucked into the tissue depth by applying negative pressure to the printing table.
  • the spatial penetration depth and therefore the wetting of the fibers inside the fabric is dependent on the viscosity of the activator solution and on the level of the negative pressure applied.
  • the penetration depth of the activator solution can be influenced within a wide range (from the surface wetting to the complete soaking of the tissue within the printed areas) by the following key data:
  • Emulsion layer thickness 10 - 50 ⁇ m, preferably 20 - 30 ⁇ m
  • Viscosity of the activator solution depending on the application process, in screen printing in the range of 1000 - 8000 mPas, preferably 2000 - 6000 mPas In the ink jet process: 100 - 1000 mPas, preferably 150 - 500 mPas
  • Negative pressure 720 - 1000 mbar, preferably 700 - 500 mbar
  • the depth of penetration is still dependent on the fabric thickness (thick fabrics can no longer be completely soaked with the activator pressure from only one side, but are then suitable for circuit printing on both sides).
  • An activation solution consisting of 44.3 g of a commercially available aliphatic isocyanate (Desmodur N 100), 0.80 g of 4-cyclohexene-1, 2-dicarboxylic acid palladium (II) chloride, 250 ml of methoxypropyl acetate and 100 ml of butyl glycolate is dispersed through The addition of highly disperse silica adjusted to a viscosity of 2500 mPas at 23 ° C.
  • the activator paste thus produced is printed on a polyester-containing three-dimensionally woven fabric with a thickness of approx.
  • the starting material is a single (uniform pattern) or multiple (several patterns with different densities in one textile) structured textile (woven, knitted, crocheted, lace or the like), the 3-D is selectively provided with noble metal germination, the germinated areas then being coated with metal.
  • the coating can be carried out according to different methods, which differ in whether the textile is structured in a single or multiple way.
  • the selectivity is achieved through the type of coating process.
  • the selectivity is achieved by the different patterns (density of the textile fibers).
  • the coating process always consists of 2 sub-processes, the activation step, in which the textile is selectively germinated, and the metallization step, in which the metallization takes place.
  • the activation step can be carried out using the following methods: a) screen printing, b) spraying process with suction device, c) micro-spraying process (ink-jet), or d) offset printing (gravure printing process)
  • the metallization step is preferably always carried out using the electroless metallization method.
  • the 3-D selective metallization of simply structured textiles is achieved when the activation is carried out in the a) screen printing process with various masks (screens) in which the penetration depth of the activator is varied by varying the suction rate and / or changing the viscosity of the liquid activator he follows.
  • the 3-D selective metallization of multi-structured textiles is achieved on the one hand by the design of the textile (dense and less dense areas, see FIGS. 2 and 3), which is activated.
  • the activation is carried out in a) screen printing in a step in which the penetration depth of the activator is determined by setting the suction rate and / or its viscosity.
  • micro-spray process (ink-jet) process as b)
  • offset printing carried out with a mask, the depth of penetration of the activator being determined by varying the suction rate and / or changing its viscosity.
  • the tissue can be activated on one (eg 1 circuit) or on both sides (eg 2 circuits).
  • activating on one side full penetration of the textile or partial penetration and isolating areas from metallized areas are obtained on opposite sides.
  • full penetration is obtained on opposite sides or, with less penetration, an electrically insulating core inside the textile.
  • the manufacturing process consists of repeating the one-sided activation (see above) on the opposite side of the textile.
  • the conductor tracks on the opposite sides can be electrically connected to one another by conductive sewing, eyelets, crimping, piercing or the like. The flexibility of the fabric is retained even after coating. The thickness of the coating is only set in the metallization process.
  • the textile selectively metallized in this way, is used, for example, as a power supply for the mains-independent supply of various small consumers (sensors, switches, transistors, diodes, resistors, capacitors, displays, LEDs, in various small portable devices) with battery power.
  • the current carrying capacity of the individual conductor tracks is designed as required. Depending on the conductor layout and heat dissipation, it can also be up to 100 amperes or more.
  • 1 shows the conductor track structure according to the invention in a schematic cross section of a detail area of the fabric (G) which has already been partially electrically conductively coated.
  • the self-electrically non-conductive flexible threads 4 are individually provided with a thin layer 5 of a conductive metal, such as copper, in the area of the partial electrically conductive coating 1 forming a conductor track, this coating 1 up to the thickness 2 of the fabric (G) is enough and thus an insulating layer 3 remains on the back.
  • regions a, b, c and d are used to denote regions of different weave densities in the fabric (G) each shown in a schematic partial section. From Fig. 2 it can be seen that the treatment with the activator (as described above) can lead to a selective coating with different penetration depths; Depending on the viscosity and the duration of exposure, complete penetration can already be achieved in the less dense areas.
  • the one-sided treatment with the activator results in an asymmetrical pattern (in cross-section).
  • treatment with the activator on both sides results in a symmetrical pattern of the coating (in cross section) - opposite coated areas can still be conductively connected at individual points in a manner not shown here by means of a push button or the like.
  • a different pattern could of course also be applied to both sides.
  • 4 shows, as an example of the use of a flexible conductor structure according to the invention, the inner part of a so-called "helmet apron", for example of a fire helmet.
  • this helmet apron can now additionally function as an energy supply or signal connection or electrical control of various electrical devices arranged on the helmet or in the neck or shoulder area shear or electronic devices such as flashlights, radios, microphones, headphones, night vision devices, signal switches, dialing keyboards and the like, also with different requirements for supply voltage or current to be provided.
  • a corresponding single or multi-part battery with multiple taps can be carried on the back, for example, and connected in the illustrated example with five push buttons at positions 7 (+) and 8 (-).
  • the various devices with two different voltages (9 and 12, for example 6 volts and 10 and 11, for example 12 volts) can also be connected, for example, via push buttons.
  • the conductor tracks 13 are formed according to the examples discussed in FIGS. 1 to 3 in the fabric and do not or hardly hinder its flexibility.
  • 5 and 6 is a multi-layer flexible fabric structure for use, for example, as a so-called "star curtain" in the decoration. Between each of the conductor tracks 13, which are again designed, as discussed in accordance with FIGS.
  • LEDs 14 are arranged here, which are connected to the conductor tracks 13 in an electrically conductive manner using conventional connection techniques, for example by means of clamping connections, Gluing, partial soldering or the like.
  • the darker outer conductor tracks are thicker as current busbars and are completely penetrating the substrate and, in the illustration according to FIG. 5, lead to connections 15, 16 to the outside.
  • the only hatched conductor tracks 13 between them do not penetrate completely through the substrate according to FIG. 6, so that the rear side remains insulating.
  • the conductor track structure according to the invention is usually sandwiched between outer cover layers, so that the conductor tracks themselves are protected inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

L'invention concerne une structure de pistes conductrices flexible composée d'un substrat essentiellement plat non-conducteur, comportant un revêtement partiellement conducteur (1, 5). Pour améliorer la flexibilité, la robustesse et simplifier la fabrication de ladite structure, ledit substrat est un tissu de type textile (G) composé de fils non-conducteurs (4), assemblé de façon tridimensionnelle de manière à présenter une épaisseur supérieure à l'épaisseur des fils, le revêtement partiellement conducteur (5) adhérant aux fils et pénétrant au moins partiellement le tissu (G) sur au moins une partie (2) de l'épaisseur du tissu. La structure selon l'invention est fabriquée par activation partielle par germination de métaux précieux, et revêtement conducteur ultérieur des zones activées, le processus de fabrication faisant par ailleurs appel à une pâte activatrice présentant une viscosité définie et pénétrant dans le tissu (G) jusqu'à la profondeur voulue à l'aide d'air comprimé.
PCT/AT2004/000261 2003-07-23 2004-07-21 Structure de pistes conductrices flexible et procede de fabrication et d'utilisation de celle-ci WO2005009092A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1152/2003 2003-07-23
AT11522003 2003-07-23

Publications (1)

Publication Number Publication Date
WO2005009092A1 true WO2005009092A1 (fr) 2005-01-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008036152B3 (de) * 2008-08-01 2010-04-15 Textilforschungsinstitut Thüringen-Vogtland e.V. Verfahren zur selektiven, partiellen Beschichtung von Flächengebilden
US11111593B2 (en) * 2015-01-16 2021-09-07 Nanowear Inc. Large scale manufacturing of hybrid nanostructured textile sensors

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2092868A (en) * 1981-02-10 1982-08-18 Mb Metals Ltd Electrically heated fabric articles
DE3210097A1 (de) * 1982-03-19 1983-09-29 Witte & Sutor Gmbh, 7157 Murrhardt Flaechenheizleiter fuer flexible waermegeraete
EP0256395A2 (fr) * 1986-08-12 1988-02-24 Bayer Ag Procédé pour améliorer l'adhérence des couches de métaux déposées par voie chimique sur des surfaces en matière plastique
US5411795A (en) * 1992-10-14 1995-05-02 Monsanto Company Electroless deposition of metal employing thermally stable carrier polymers
WO2002058172A2 (fr) * 2001-01-19 2002-07-25 Funktionswerkstoffe Forschungs- U. Entwicklungs Gmbh Electrode pour systeme electrochimique
GB2383197A (en) * 2001-12-14 2003-06-18 Nel Technologies Ltd Metallised fabric electric circuit
US20030165741A1 (en) * 2000-05-10 2003-09-04 Martha Maly-Schreiber Multilayer electrode

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2092868A (en) * 1981-02-10 1982-08-18 Mb Metals Ltd Electrically heated fabric articles
DE3210097A1 (de) * 1982-03-19 1983-09-29 Witte & Sutor Gmbh, 7157 Murrhardt Flaechenheizleiter fuer flexible waermegeraete
EP0256395A2 (fr) * 1986-08-12 1988-02-24 Bayer Ag Procédé pour améliorer l'adhérence des couches de métaux déposées par voie chimique sur des surfaces en matière plastique
US5411795A (en) * 1992-10-14 1995-05-02 Monsanto Company Electroless deposition of metal employing thermally stable carrier polymers
US20030165741A1 (en) * 2000-05-10 2003-09-04 Martha Maly-Schreiber Multilayer electrode
WO2002058172A2 (fr) * 2001-01-19 2002-07-25 Funktionswerkstoffe Forschungs- U. Entwicklungs Gmbh Electrode pour systeme electrochimique
GB2383197A (en) * 2001-12-14 2003-06-18 Nel Technologies Ltd Metallised fabric electric circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008036152B3 (de) * 2008-08-01 2010-04-15 Textilforschungsinstitut Thüringen-Vogtland e.V. Verfahren zur selektiven, partiellen Beschichtung von Flächengebilden
US11111593B2 (en) * 2015-01-16 2021-09-07 Nanowear Inc. Large scale manufacturing of hybrid nanostructured textile sensors

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