Anti-tarnish coatings

Details Anti-tarnish coatings Anti-tarnish coatings

2011-07-05

2011-07-05

Cameron, Erma (Department: 1715)

Coating processes

With post-treatment of coating or coating material

Chemical agent applied to treat coating

C427S343000, C427S404000, C427S405000, C427S430100, C427S435000, C427S436000

Reexamination Certificate

active

07972655

ABSTRACT:
A method is disclosed for enhancing the corrosion resistance of a surface of a copper or copper alloy substrate. The method comprises depositing a metallic surface layer comprising a precious metal on a surface of the copper or copper alloy substrate by immersion displacement plating and exposing the electronic device to an aqueous composition comprising a first organic molecule comprising at least one functional group that interacts with and protects precious metal surfaces and a second organic molecule comprising at least one functional group that interacts with and protects copper surfaces.

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