Sensitized polyimides and circuit elements thereof
First Claim
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1. A process for depositing an electroless metal on a polyimide, the steps comprising:
- a. masking a selected area on a polyimide surface;
b. exposing unmasked portions of said polyimide surface to an open flame;
c. contacting said unmasked and flame sensitized surfaces of said polyimide with a catalyst solution whereby a catalytic amount of a catalyst is deposited on said catalyzed polyimide; and
d. depositing on said catalyzed polyimide surface a metal from an electroless bath solution.
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Abstract
A process for preparation of an activated or sensitized polyimide polymer, deposition of various catalysts on the sensitized polymer and subsequent plating on said sensitized and catalyzed surface of a metal, e. g., nickel, cobalt, copper, or gold from an electroless bath; improved adhesion, avoidance of blistering, etc. are observed; the process is capable of producing useful printed circuits such as for mounting integrated circuit chips.
84 Citations
15 Claims
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1. A process for depositing an electroless metal on a polyimide, the steps comprising:
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a. masking a selected area on a polyimide surface; b. exposing unmasked portions of said polyimide surface to an open flame; c. contacting said unmasked and flame sensitized surfaces of said polyimide with a catalyst solution whereby a catalytic amount of a catalyst is deposited on said catalyzed polyimide; and d. depositing on said catalyzed polyimide surface a metal from an electroless bath solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification