×

Thermal dissipating metal core printed circuit board

  • US RE29,784 E
  • Filed: 06/28/1974
  • Issued: 09/26/1978
  • Est. Priority Date: 11/01/1968
  • Status: Expired due to Term
First Claim
Patent Images

1. A metal core printed circuit board comprisinga sheet of metal having a thickness slightly less than the thickness of a standard complete printed circuit board,a base film of synthetic plastic resin forming a coating extending over at least one surface of said sheet, said coating having a roughened surface texture comprising a multiplicity of keying depressions,a circuit pattern on said coating comprising conducting metallic lines,said metallic lines comprising a base layer of nickel in keyed bonded engagement with said coating and the depresions therein, a film of copper in electroplated engagement with said nickel, an outer layer of nickel in electroplated engagement with said film of copper, a layer of pyrophosphate copper in bonded engagement with said last identified layer of nickel, and an overlying layer of metal unlike said copper and nickel in adhesive engagement with said pyrophosphate copper, there being spaces between said conducting metallic lines wherein said coating is exposed and said metal core is covered by said coating.

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