Patent ID: 8203210

Claim:
A semiconductor device comprising: a semiconductor substrate; a semiconductor element formed in a main surface of the semiconductor substrate; a first insulating film containing silicon and oxygen formed over the main surface in which the semiconductor element of the semiconductor substrate is formed; a first opening formed in the first insulating film; a first conductor part embedded in the first opening; a second insulating film containing silicon and oxygen, the second insulating film having portions formed directly on and in direct contact with an upper surface of the first insulating film; a third insulating film containing silicon and carbon formed over the second insulating film; a fourth insulating film containing silicon and oxygen formed over the third insulating film; a wire opening formed in the second, third, and fourth insulating films; and a first wire embedded in the wire opening and electrically coupled with the first conductor part, at least part of a lower surface of the first wire being in direct contact with the upper surface of the first insulating film, wherein the second insulating film has a higher density of Si atoms than that of the first insulating film, and wherein the third insulating film is a SiCN film.