METHOD OF PRODUCING GOLD-ALLOY LAYERS AND PATTERNS ON SUBSTRATES, PRODUCTS THUS PRODUCED AND THE SOLUTIONS TO BE USED THEREFORE

摘要

14 "Method of producing gold-alloy layers and patterns on substrate,products thus produced and the solution to be used therefore" Method and solution to be used in the method for the electroless deposition of gold-alloy layers and patterns onto a substrate. The solution has a pH value between 11 and 14 and contains gold in the form of a complex compound, copper ions and a complex-forming compound for copper ions, formaldehyde and alkalimetal hydroxide for adjusting the pH, the complexing constant of the gold complex being at least 105 times that of the complexing constant of the copper complex.