Flexible printed circuits

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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428901, B32B 900

Patent

active

054379164

ABSTRACT:
Flexible printed circuits comprising cobalt circuitry electrolessly deposited on an activated ink coating prepared by heating a wet ink comprising a polymer, e.g. a vinyl polymer such as polyvinyl chloride or polyvinyl alcohol or an unsaturated polymer such as polybutadiene, and a Group 1B or 8 compound, e.g. palladium dichloride, which is adapted to drying at room temperature to a catalytically inert ink. Selective areas of the ink activated by application of heat or light are catalytic to electroless deposition of cobalt.

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