Patent ID: 6576114
Filing Date: 2003-06-10
Classification: C25D

Abstract:
An electroplating bath, comprising a cyanide-containing gold compound wherein the gold is present in an amount of about 2.5 to 3.5 g/l, iron nitrate wherein the iron is present in an amount of about 0.6 to 0.8 g/l, zirconium nitrate wherein the zirconium is present in an amount of about 0.2 to 0.5 g/l, diammonium hydrogen citrate in an amount of about 75 to 125 g/l, citric acid in an amount of about 40 to 80 g/l, and 3-(1-pyridino)-1-propane sulphonate in an amount of about 1 to 3 g/l, wherein the bath is free of cobalt, cadmium and nickel ions.