Patent ID: 7790605

Claim:
A method of manufacturing a semiconductor device comprising: forming a first insulating film on a semiconductor substrate; embedding a first metal wiring in the first insulating film; forming a first photosensitive film on the first insulating film, the first photosensitive film having a first trench that exposes the first metal wiring and exposes a portion of the first insulating film; forming a first barrier film on the first photosensitive film and on bottom and side surfaces of the first trench; forming a metal film on the first barrier film in the first trench and over the first photosensitive film; forming a second metal wiring by removing the first photosensitive film and portions of the first barrier film and the metal film that are positioned on the first photosensitive film, the second etal wiring being a non-removed portion of the metal film in the first trench, thus leaving a first portion of the first barrier film on a bottom surface of the second metal wiring; forming a second photosensitive film directly on an exposed portion of the first insulating film, wherein a second trench is formed in the second photosensitive film such that it surrounds the second metal wiring; forming a second barrier film on the second photosensitive film and the second metal wiring; removing the second photosensitive film and a portion of the second barrier film that is positioned on the second photosensitive film, to leave portions of the second barrier film on a top and sidewalls of the second metal wiring and on the exposed first insulating film adjacent to the sidewalls; and forming a second insulating film on the first insulating film and the second metal wiring.