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STRETCHABLE POLYMER THICK FILM SILVER CONDUCTOR FOR HIGHLY PERMEABLE SUBSTRATES

  • US 20150137048A1
  • Filed: 11/18/2013
  • Published: 05/21/2015
  • Est. Priority Date: 11/18/2013
  • Status: Active Grant
First Claim
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1. An electrical circuit comprising a conductor formed from a polymer thick film conductor composition comprising:

  • (a) 30 to 70 wt % silver flakes;

    (b) 20 to 50 wt % first organic medium comprising 10 to 50 wt % thermoplastic urethane resin dissolved in a first organic solvent, wherein the weight percent (wt %) of the thermoplastic urethane resin is based on the total weight of the organic medium; and

    (c) 5 to 20 wt % second organic medium comprising 10 to 50 wt % thermoplastic polyhydroxyether resin dissolved in a second organic solvent wherein the weight percent of the thermoplastic polyhydroxyether resin is based on the total weight of the organic medium;

    wherein the ratio of the weight of the first organic medium to the weight of the second organic medium is about 3;

    1, wherein the weight percent of the silver flakes, the first organic medium and the second organic medium are based on the total weight of the polymer thick film conductor composition and wherein the composition is dried to form the conductor on the permeable substrate.

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