Gold alloy plating bath and method

Details Gold alloy plating bath and method Gold alloy plating bath and method

1978-02-03

1978-10-24

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 43R, C25D 362, C25D 364

Patent

active

041219821

ABSTRACT:
An aqueous bath for electroplating a gold/silver alloy includes a water soluble electrolyte such as potassium pyrophosphate, gold and silver present as their respective alkali metal cyanides, and a water soluble brightener system. The water soluble brightener system comprises a selenium compound containing selenium in the -2 valance state and a polyethyleneimine compound. The bath has a pH of about 8 to 10 and may include tetraethanolamine borate ester to decrease the tensile stress of the electrodeposit.

REFERENCES:
patent: RE24582 (1958-12-01), Rinker
patent: 2800439 (1957-07-01), Fischer et al.
patent: 2967135 (1961-01-01), Ostrow et al.
patent: 3092559 (1963-06-01), Foulke et al.
patent: 3642589 (1972-02-01), Nobel et al.
patent: 3666640 (1972-05-01), Smith
patent: 3864222 (1975-02-01), Wilson et al.
patent: 3984292 (1976-10-01), Culjkovic

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