Patent ID: 8344511

Claim:
A semiconductor device, comprising: a semiconductor substrate; at least one semiconductor element formed over the semiconductor substrate, each of said at least one semiconductor element including a silicide region comprised of a silicide of an alloy of Ni and at least one element X selected from the group comprising Pt, V, Pd, Zr, Hf and Nb; an interlayer insulating film provided over said at least one semiconductor element, said interlayer insulating film being provided with a through hole having an inner surface including a side comprised of the interlayer insulating film and a bottom surface comprised of the silicide region; a barrier metal film including a TiN film covering the inner surface; a plug filling the through hole via the barrier metal film; and an intermediate film formed between the silicide region and the barrier metal film, wherein a total concentration of Ti—Si—O—N bond and Ti—X—Si—O—N bond in the intermediate film is higher than that of Ti—Ni—O—N bond.