Electrolysis: processes – compositions used therein – and methods – Product produced by electrolysis involving electrolytic...
Patent
1993-11-24
1995-09-05
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Product produced by electrolysis involving electrolytic...
205 77, 205155, 205156, 205197, 205243, 205244, 205318, 205319, 427 96, 428607, 428612, 428658, 428674, 428687, C25D 104, C25D 706, B21C 3700
Patent
active
054476194
ABSTRACT:
A surface of copper foil is protected from oxidation and tarnishing by electrodepositing on the surface a protective layer containing metallic zinc and one or more compound of tri-valent chromium, which protection layer is easily removable by dissolution in a dilute aqueous alkaline solution and which preferably has a zinc to chromium weight ratio of 1:1 or greater. An electrodeposited copper foil especially suited for multilayer printed circuit boards has such a protective layer electrodeposited on the matte side thereof and an electrodeposited copper bonding treatment on the shiny side thereof.
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Grant and Hackh's Chemical Dictionary, 5th ed. (1987), p. 135.
Ac Kurt
Dufresne Paul
Mathieu Michel
Wolski Adam M.
Circuit Foil USA, Inc.
Niebling John
Wong Edna
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