Patent ID: 7741230
Filing Date: 2010-06-22
Classification: C23F,H01L

Abstract:
1. A method for making a semiconductor structure comprising: forming a dielectric layer above a substrate; forming a metal layer above said dielectric layer; forming a masking layer above said metal layer, wherein said masking layer is comprised of a photo-resist; patterning said masking layer to provide a patterned masking layer and an exposed portion of said metal layer; and removing, in the presence of said patterned masking layer, said exposed portion of said metal layer with a wet etch solution, wherein said wet etch solution is comprised of an active ingredient comprising one or more types of molecules having two or more oxygen atoms, wherein said exposed portion of said metal layer is removed with a first selectivity to said photo-resist, and wherein said exposed portion of said metal layer is removed with a second selectivity to said dielectric layer.