Sulfite gold plating bath and process

Details Sulfite gold plating bath and process Sulfite gold plating bath and process

1973-12-17

1976-11-09

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 43G, 204 44, C25D 348, C25D 362

Patent

active

039909549

ABSTRACT:
Disclosed is an improved electroplating bath and process for obtaining semi-bright to bright electrodeposits of gold and gold alloys. The electroplating bath contains a gold sulfite complex and a nitrogen-free diphosphonic compound having at least two phosphonic groups attached directly to a carbon atom. Presence of the nitrogen-free phosphonate compound enhances the stability of the gold sulfite baths and improves the brightness of electrodeposits obtained therefrom.

REFERENCES:
patent: 3057789 (1962-10-01), Smith
patent: 3475292 (1969-10-01), Shoushanian
patent: 3666640 (1972-05-01), Smith
patent: 3672969 (1972-06-01), Nobel et al.
patent: 3770596 (1973-11-01), Bick et al.
patent: 3776822 (1973-12-01), Baker
patent: 3883409 (1975-05-01), Olivier

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