Patent ID: 7737030

Claim:
A method for manufacturing a semiconductor device, comprising: forming a first metal wire in a groove formed in an insulating film on a semiconductor substrate; forming an interlayer dielectric on the insulating film and the first metal wire; forming a via hole by etching the interlayer dielectric; forming a first barrier metal on sidewalls of the via hole; forming an organic film in the via hole having the first barrier metal formed therein; etching the first barrier metal exposed by performing an etchback on the organic film to a predetermined position; forming a trench integrally with an upper portion of the via hole by etching the interlayer dielectric to a predetermined position; forming a second barrier metal on the first barrier metal and sidewalls of the trench in the via hole, after the organic film remaining in the via hole is removed; and forming a second metal wire in the via hole and the trench having the second barrier metal formed therein.