Patent ID: 7772076

Claim:
A method of manufacturing a semiconductor device, comprising: forming a dummy gate wiring layer having a side surface and an upper surface on a first area of one major surface of a substrate, the major surface of the substrate including the first area and a second area; after forming the dummy gate wiring layer, forming a semiconductor film on the second area of the major surface of said substrate by using epitaxial growth; forming, on said semiconductor film, a gate sidewall which is made of an insulator and covers the side surface of said dummy gate wiring layer; after forming said gate sidewall, forming an interlayer insulating film above the major surface of said substrate, the interlayer insulating film surrounding the dummy gate wiring layer, the semiconductor film and the gate sidewall; flattening said interlayer insulating film so as to expose the upper surface of said dummy gate wiring layer; removing said dummy gate wiring layer after exposing the upper surface of said dummy gate wiring layer to form a first groove in the interlayer insulating film; forming a gate insulating film on a bottom surface and a sidewall of the first groove to form a second groove in the first groove; and forming a gate wiring layer in the second groove.