Patent ID: 9219130
Filing Date: 2015-12-22
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: preparing a semiconductor substrate; forming a gate electrode on the semiconductor substrate via a gate insulating film; forming a laminated film on the semiconductor substrate so as to cover the gate electrode, the laminated film including a first insulating film and a second insulating film disposed on the first insulating film; forming a first side wall insulating film, comprising the laminated film, on a side wall of the gate electrode by etching back the laminated film; epitaxially growing an epitaxial semiconductor layer on a portion of an exposed surface of the semiconductor substrate which is not covered with the gate electrode such that an edge of a bottom surface of the first insulating film of the first side wall insulating film is exposed outside the epitaxial semiconductor layer, said edge of the bottom surface of the second insulating film facing the epitaxial semiconductor layer; forming an oxide film on a surface of the epitaxial semiconductor layer by oxidizing the surface of the epitaxial semiconductor layer; after the forming of the oxide film, removing the second insulating film forming the first side wall insulating film; after the forming of the oxide film, removing the oxide film; after the removing the oxide film, forming a third insulating film on the semiconductor substrate so as to cover the gate electrode and the epitaxial semiconductor layer; and forming the second side wall insulating film formed of the third insulating film on the side wall of the gate electrode via the first insulating film by etching back the third insulating film.