Patent ID: 6616828
Filing Date: 2003-09-09
Classification: C25D

Abstract:
A method of electroplating a surface of a semiconductor wafer, comprising the steps of:placing said surface of said semiconductor wafer in a platinum electrolytic solution; using an electrode within said platinum electrolytic solution to electroplate said surface of said semiconductor wafer, said electroplating producing Pt+2 ions in said platinum electrolytic solution; removing at least a part of said platinum electrolytic solution having a first concentration of Pt+2 ions to an oxidizing area; reducing said first concentration of Pt+2 ions of said removed at least part of said electrolytic solution to a second lower concentration of Pt+2 ions; and returning said removed at least part of said electrolytic solution having said second lower concentration of Pt+2 ions to said electrolytic solution.