Patent ID: 6977216

Claim:
A method for forming a metal wire in a semiconductor device, comprising the steps of: forming a lower metal wire on a semiconductor substrate; depositing an insulating film on the lower metal wire; forming a damascene etch pattern in the insulating film; depositing a conductive material on the insulating film so that the conductive material fills the damascene etch pattern, thus forming a conductive layer including step portions; depositing, on an entire top surface of the conductive layer, a material having a high etch selective ratio against the conductive material, thereby forming an anti-etch film; stripping a part of the anti-etch film by means of a chemical mechanical polishing (CMP) process until the conductive layer is exposed; stripping a portion of the conductive layer by means of an etch process using the anti-etch film as an etch mask; and stripping the remaining anti-etch film and conductive layer by means of a CMP process, thereby forming a conductive wire with which the damascene etch pattern is filled.