Patent ID: 7968966

Claim:
A semiconductor device comprising: a first inter-layer insulating film formed over a semiconductor substrate; first wirings buried in first wiring grooves formed in the first inter-layer insulating film, wherein the first wirings are formed of copper as a main component; a first barrier insulating film formed directly on the first wirings and the first inter-layer insulating film, wherein the first barrier insulating film has a function for preventing the diffusion of copper; a second inter-layer insulating film formed over the first barrier insulating film; a fuse buried in a second wiring groove formed in the second inter-layer insulating film, wherein the fuse is formed of copper as a main component; a second wiring buried in a third wiring groove formed in the second inter-layer insulating film, wherein the second wiring is formed of copper as a main component; a second barrier insulating film formed directly on the fuse, the second wiring and the second inter-layer insulating film, wherein the second barrier insulating film has a function for preventing the diffusion of copper; a third inter-layer insulating film formed over the second barrier insulating film; an uppermost layer wiring formed over the third inter-layer insulating film; and a surface protective film formed over the uppermost layer wiring, wherein a thickness of the second barrier insulating film is larger than a thickness of the first barrier insulating film, wherein a first opening reaching the second barrier insulating film is formed in the third inter-layer insulating film and the surface protective film above the fuse, and wherein a second opening reaching the uppermost layer wiring is formed in the surface protective film above the uppermost layer wiring.