Patent ID: 7095086

Claim:
A method of manufacturing a semiconductor device comprising; forming an ion implant buffer film an a semiconductor substrate; doping impurities to form an LDD region on the semiconductor substrate; removing the ion implant buffer film; growing a silicon layer by selective epitaxy; doping ion impurities on the silicon layer to form a heavily doped layer; forming a nitride film having a cutout wider than a gate forming region on the heavily doped layer; etching the heavily doped layer using the nitride film as an etch mask to form source/drain regions; forming a silicide preventing film on an upper surface of the LDD region and on sides of the source/drain regions; forming lateral spacers within the cutout on lateral sides of the nitride film and on the silicide preventing film; etching the silicide preventing film and the LDD region using the lateral spacers as an etch mask to expose a surface of the substrate; forming a gate oxide layer on the exposed surface of the substrate; forming a gate on the gate oxide layer; removing the lateral spacers and the nitride film; and forming silicide layers on the gate and the source/drain regions.