Copper electrodeposition with substituted phthalocyanine and...

Details Copper electrodeposition with substituted phthalocyanine and... Copper electrodeposition with substituted phthalocyanine and...

C - Chemistry, Metallurgy

25

D

204/36

C25D 3/38 (2006.01) C09K 13/04 (2006.01)

Patent

CA 1255621

Abstract of the Disclosure An aqueous acidic electrolyte composition and process for electrodepositing an exceptionally bright, leveled and ductile copper deposit on conductive substrates incorporating a synergistic combination of a substituted phthalocyanine brightening agent and an apo safranine brightening agent, preferably in further combination with supplemental brightening agents such as organic polysulfides, sulfides and/or polyether compounds. In accordance with the process aspects of the present invention, the foregoing copper electrolyte is employed for electrodepositing a copper plate on a conductive substrate at temperatures of from about 15° up to about 50°C and at cathode current densities ranging from as low as about 0.5 to about 400 amperes per square foot achieving exceptional brightness particularly in the low current density recess areas.

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