Patent ID: 6162365
Filing Date: 2000-12-19
Classification: H05K,Y10T

Abstract:
A process for producing a printed wiring board comprising the steps of:(a) applying a first electrically-conductive layer to a surface of a dielectric substrate;(b) covering said first electrically conductive layer with a coating and exposing and developing said coating to reveal selected areas of said first conductive layer;(c) depositing a second electrically-conductive layer on said selected areas of said first conductive layer;(d) depositing a metal layer consisting essentially of a catalytically active noble metal or combination of noble metals on said second electrically conductive layer;(e) removing said coating; and(f) selectively etching said first electrically conductive layer surrounding said selected areas to expose said substrate surface and allow said selected areas of said first electrically conductive layer to remain on said substrate.