Patent ID: 6527939
Filing Date: 2003-03-04
Classification: C23F,C25B,C25C,C25D

Abstract:
A method for electrodepositing copper metal foil from an electrolyte solution containing organic substituent and that is contained in an electrolytic cell, with the cell comprising at least one oxygen evolving anode, which method provides extended anode activity while maintaining cell electrode potential during said copper electrodeposition, which method comprises:providing an unseparated electrolytic cell; establishing in said cell an electrolyte containing organic substituent, and containing said copper metal in solution; providing an anode in said cell in contact with said electrolyte which anode has multiple coating layers on an electrode base of a valve metal, said electrode base having at least one coating layer of an electrochemically active coating and at least one topcoating layer of a valve metal oxide coating or a tin oxide coating layer, whereby said active coating layer contains a first composition and said topcoating layer contains a second composition; impressing an electric current on said anode; and conducting said electrodeposition of said copper foil.