Patent ID: 6750108
Filing Date: 2004-06-15
Classification: H01L,Y10S

Abstract:
A method for manufacturing a semiconductor device comprising:(a) forming a dummy gate provided with a sidewall spacer at its side wall and an anti-silicidation film thereon on a semiconductor substrate, as well as forming a source/drain region on the surface of the semiconductor substrate; (b) forming a metal film on the whole surface of the obtained semiconductor substrate, the resultant being subject to a suicide reaction to form a suicide layer only on the source/drain region; (c) removing the anti-silicidation film and the dummy gate to form a trench; and (d) forming a gate insulating film and gate electrode material film in the trench to form a gate electrode and gate insulating film in the trench; wherein the step (a) comprises the steps of: forming a film for forming the dummy gate, anti-reflection film and a resist film on the semiconductor substrate; patterning the resist film; forming the dummy gate by etching the film for forming the dummy gate with the obtained resist film as a mask; removing the resist film; oxidizing the anti-reflection film to convert it into the anti-silicidation film; forming the sidewall spacer at the side wall of the obtained dummy gate before or after the conversion; and forming the source/drain region on the semiconductor substrate.