Patent ID: 8174125

Claim:
A semiconductor device comprising: a substrate; an interlayer insulating film provided above the substrate and including a stacked structure of first and second insulating films, the first insulating film having a relative dielectric constant which is at most a predetermined value while the second insulating film having a relative dielectric constant greater than the predetermined value and containing Si and C; a wire provided in a recess for the wire and passing through the stacked structure of the first and second insulating films; and a dummy wire provided in a recess for the dummy wire and located in a predetermined area spaced from an area where the wire is provided, wherein at least two layers of the interlayer insulating films comprising the stacked structure of the first and second insulating films are provided above the substrate; the dummy wire is provided in each of the interlayer insulating films and passing through each of the stacked structure of the first and second insulating films and the dummy wire provided in the upper layer of the interlayer insulating film is connected to the dummy wire provided in the lower layer of the interlayer insulating film; and the wire is provided in each of the interlayer insulating films and passing through each of the stacked structures of the first and second insulating films and the wire provided in the upper layer of the interlayer insulating film is connected to the wire provided in the lower layer of the interlayer insulating film; and the second insulating film in the upper layer of the interlayer insulating film is formed on an upper surface of the wire provided in the lower layer of the interlayer insulating film.