Patent ID: 6881633

Claim:
A method of manufacturing a semiconductor device, comprising: forming a gate electrode on a semiconductor substrate with a gate insulating film interposed therebetween; forming shallow source/drain diffusion layer in those regions of said semiconductor substrate which are positioned on both sides of said gate electrode by means of ion implantation performed with said gate electrode used as a mask; forming a first side-wall insulating film on said semiconductor substrate after formation of said shallow source/drain diffusion layers; forming a second side-wall insulating film on said first side-wall insulating film; etching back a laminate structure including said first side-wall insulating film and said second side-wall insulating film; removing said second side-wall insulating film remaining on the side-wall portion of said gate electrode so as to form an L-shaped/reversed L-shaped side-wall structure consisting of said first side-wall insulating film covering said gate electrode side-wall portion and a part of the upper surface of said semiconductor substrate in the vicinity of said gate electrode; forming a semiconductor layer thicker than said first side-wall insulating film on said semiconductor substrate by means of a selective epitaxial growth method so as to form an extending portion of said semiconductor layer on said first side-wall insulating film covering a part of the upper surface of said semiconductor substrate; and forming deep source/drain diffusion layers in those portions of said semiconductor substrate which are positioned on both sides of said gate electrode by means of ion implantation performed with said gate electrode equipped with the side-wall structure used as a mask.