Patent ID: 6936528

Claim:
A method of forming a cobalt suicide film, said method comprising: forming a cobalt-containing film on a surface of a semiconductor substrate having an insulating region and a silicon-containing conductive region, the cobalt-containing film being formed at a temperature at which cobalt of the cobalt-containing film and silicon of the silicon-containing conductive region react with each other to form a diffusion restraint interface film interposed between the cobalt-containing film and silicon of the silicon-containing conductive region; forming a titanium-rich capping film on the cobalt-containing film to obtain a resultant structure, the titanium-rich capping film having a titanium/other elements atomic % ratio of more than 1; and annealing the resultant structure so that cobalt of the cobalt-containing film and silicon of the silicon-containing conductive region react with each other to form the cobalt suicide film.