Patent ID: 7517781

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: sequentially forming a first insulation film and a dummy gate electrode on a semiconductor substrate: forming a lightly doped junction region by using the dummy gate electrode as a mask; forming a first spacer on a side wall of the dummy gate electrode; forming a heavily doped junction region; forming a second insulation film on the semiconductor substrate where the heavily doped junction region is formed, and removing the dummy gate electrode to form a cavity exposing at least a portion of the first insulation layer; forming a second spacer on a side wall of the cavity by etching the exposed portion of the first insulation film and at least a portion of the semiconductor substrate beneath the exposed portion of the first insulation film; sequentially forming a gate insulation film and a gate conductor on the second spacer, and then removing the second insulation film and at least a portion of the gate insulation film; and forming a salicide film on a top of the gate conductor and in the lightly doped junction region.