×

Additive printed circuit process

  • US 4,470,883 A
  • Filed: 05/02/1983
  • Issued: 09/11/1984
  • Est. Priority Date: 05/02/1983
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for forming an electrical conductor in desired areas of a substrate, comprising the steps of:

  • preparing an ink composition having finely-divided nickel powder in a polymer ink;

    adjusting the amount of finely-divided nickel powder to comprise at least 80%, by weight, of the ink composition when that composition is cured;

    applying the ink composition in a desired design to a surface of a substrate;

    curing the ink composition; and

    contacting the cured ink composition design with a metal salt solution in which the metal cation is more noble than the finely-divided nickel and the anion of the metal salt forms soluble salts with the cation and the finely-divided nickel, to form a contiguous layer of the metal on the ink composition design by a combination augmentative-replacement and electroplating reaction.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×