Abstract: The use of alkali metal, alkaline earth metal, ammonium and substituted ammonium salts of alkyl and alkanol sulfonic acids as additives in pure metal and metal alloy halide electroplating baths has a number of unexpected benefits including wider useful current density range and improved appearance. The metals and metal alloys include but are not limited to tin, lead, copper, nickel, zinc, cadmium, tin/zinc, zinc/nickel and tin/nickel.
Type:
Grant
Filed:
March 19, 1999
Date of Patent:
June 19, 2001
Assignee:
Technic, Inc. and Specialty Chemical System, Inc.
Inventors:
Hyman D. Gillman, Brenda Fernandes, Kazimierz Wikiel