Patent ID: 7413956

Claim:
A method for manufacturing a semiconductor device comprising: forming a field oxidation film on inactive regions of a silicon substrate; forming buffer oxidation films on active regions of the semiconductor substrate, wherein the buffer oxidation films expose the semiconductor substrate where a gate electrode is to be formed; forming an insulating film on the exposed semiconductor substrate and the buffer oxidation films; depositing a gate conductive film on the insulating film; patterning the gate conductive film and the insulating film to form a gate electrode and a gate insulating film, wherein both ends of the gate insulating film and the gate electrode overlap the end of the buffer oxidation films; forming a spacer insulating film for preventing a silicide film from being formed at the sidewalls of the gate electrode; forming source/drain junctions on the silicon substrate adjacent to, but not directly under, the gate electrode; and forming a silicide film at designated portions of the source/drain junctions and on the upper surface of the gate electrode.