Silver plating baths and silver plating method using the same

Details Silver plating baths and silver plating method using the same Silver plating baths and silver plating method using the same

1995-10-03

1997-02-11

Gorgos, Kathryn

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly single metal coating

106123, 106126, C25D 346, C23C 1600, C23C 1800

Patent

active

056016964

ABSTRACT:
An object is to provide practical silver plating technique, high-speed silver plating technique and silver strike plating technique which have, respectively, substantially the same performance as cyanide baths without use of any toxic cyanide. A hydantoin compound of the following general formula is contained as a complex-forming agent ##STR1## [wherein R.sub.1, R.sub.3 and R.sub.5 independently represent hydrogen, an alkyl group having 1-5 carbon atoms, an aryl group or an alcohol].

REFERENCES:
patent: 3018232 (1958-06-01), Bishoff et al.
patent: 4246077 (1981-01-01), Hradil et al.
patent: 4399006 (1983-08-01), Nobel et al.
Promsiel et al., "Silver Plating", The Electrochem. Soc., Preprint 80-35, pp. 473-498. Oct. 1941.
Article entitled "Development of Cyanide-Free Silver Plating Bath" by Hiroyuki Inoue et al., College of Eng., University of Osaka, Japan (no date).
Article entitled "Effect of Additives on High Brightness Non-Cyanide Silver Electroplate" by Yongkang Ji, et al. Fac. of Eng. Nagoya University, Japan (no date).
Article entitled "Glossy Silver Electrodeposition from Non-Cyanide Bath" by Seishi Masaki et al. (no date).
H. Wachi, "Method and bath for cyanide-free silver electroplating", Chemical Abstracts, Oct. 16, 1995, p. 893 (and 1).
T. Asakawa, "Cyanide-free silver plating bath and plating method", Chemical Abstracts, Apr. 17, 1995, p. 882 (and 1).
M. J. Blaise et al., "Metallic complexation of imides. II. Thermodynamic values of the formation of silver(I), cadmium(II), cobalt(II), nickel(II), copper(II), and zinc(II) with hydantoin", Chemical Abstracts, Jun. 11, 1979, p. 431 (and 1).

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