Patent ID: 7701000

Claim:
A semiconductor device, comprising: a semiconductor substrate comprising a drain suicide and a drain region; a first epitaxial layer disposed on the semiconductor substrate and the drain region, the first epitaxial layer defining a trench; a first gate insulation layer disposed on the drain silicide; a gate oxide layer disposed on lateral sides of the trench; a gate electrode disposed in the trench; a second epitaxial layer disposed on the first epitaxial layer, the second epitaxial layer comprising a source region; a second gate insulation layer disposed on the gate electrode and the gate oxide layer; a source silicide disposed on the second gate insulation layer; an interlayer insulation layer disposed on the second epitaxial layer and the source silicide; a source contact hole exposing a portion of the source silicide; a gate contact hole exposing a portion of the gate electrode; and a drain contact hole exposing a portion of the drain silicide.