Patent Number: 6,251,253

Title: Metal alloy sulfate electroplating baths

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 sulfate electroplating baths has a number of unexpected benefits including wider useful current density range, improved appearance and in the case of tin improved oxidative stability. The metals and alloys include but are not limited to tin, nickel, copper, chromium, cadmium, iron, rhodium, ruthenium, iron/zinc and tin/zinc.

Inventors: Gillman; Hyman D. (Spring City, PA), Fernandes; Brenda (Cranston, RI), Wikiel; Kazimierz (South Kingston, RI)

Assignee: Technic, Inc.

International Classification: C25D 3/02 (20060101); C25D 3/30 (20060101); C25D 3/32 (20060101); C25D 003/02 ()

Expiration Date: 06/26/2018