Patent ID: 8669177

Claim:
A method for manufacturing a semiconductor device comprising: forming a first insulation film above a semiconductor substrate, the first insulation film being a low dielectric constant insulation film whose relative dielectric constant is smaller than a relative dielectric constant of a silicon oxide film; forming an opening in the first insulation film; forming a first metal film containing Ti in the opening; forming a second metal film containing Ta over the first metal film; forming a seed film containing Cu over the second metal film; forming a conductor containing Cu over the seed film; making thermal processing to diffuse the Ti contained in the first metal film into an entire upper surface of the conductor; exposing the entire upper surface of the conductor to a silicon-content gas to thereby form a layer containing the Ti and the Si on the entire upper surface of the conductor; forming a second insulation film including at least one of SiCO and SiCN directly on the layer containing the Ti and the Si; and forming a third insulation film over the second insulation film.