Patent ID: 7141477
Filing Date: 2006-11-28
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device, comprising: a first step implanting, into a channel formation region of a semiconductor substrate, first dopant ions of a first conductivity type which are indium ions to form a dopant implantation layer in the channel formation region; a second step of implanting second dopant ions into the semiconductor substrate to form a first amorphous layer; after the first and second steps, a third step of performing a first thermal treatment to diffuse the first dopant ions from the dopant implantation layer, thereby forming a first diffused layer of the first conductivity type in the channel formation region; and after the third step, a fourth step of selectively forming a gate insulating film on the semiconductor substrate and a gate electrode on the gate insulating film, wherein the first amorphous layer expands from the substrate surface to a region of the substrate deeper than the dopant implantation layer.