Patent ID: 7153770

Claim:
A method of manufacturing a semiconductor device, the method comprising: forming a silicon (Si)-containing gate region, a gate oxide film, a sidewall spacer, and a source/drain region with a lightly doped drain (LDD) structure on a Si-containing substrate to form a transistor structure; forming a diffusion barrier film on the entire surface of the Si-containing substrate over the transistor structure; forming a metal film on the diffusion barrier film over the transistor structure; and annealing the Si-containing substrate so that the Si-containing gate region and the source/drain region react with the metal film to selectively form a metal silicide film only at the surfaces of the gate region and the source/drain region, wherein the diffusion barrier film, which is different from the metal film, is made of at least one selected from the group consisting of Mo, Ta, Mn, Cr, W, Pd, Au, Ag, Cu, Hf, Fe, Zn, Ru, Pb, Mg, and alloys thereof.