Patent ID: 6709563
Filing Date: 2004-03-23
Classification: C25D

Abstract:
A method for filling a metal into fine recesses in a surface of a substrate, comprising:providing a substrate having fine recesses covered with a seed layer in a surface of the substrate; reinforcing the seed layer by contacting the surface of the seed layer in a first plating liquid having ions of a metal and a complexing agent; filling said fine recesses with the metal by electroplating a surface of the reinforced seed layer with contacting the substrate in a second plating liquid; washing a surface of the metal on the substrate with water or washing liquid comprising water; and removing the metal on an edge portion of the substrate by supplying an etching liquid to a surface of the metal on the edge portion of the substrate; wherein the first and the second plating liquids are free from an alkali metal and a cyanide, and the washing the surface of the metal is performed prior to the removing the metal on the edge portion of the substrate.