Patent ID: 6482714
Filing Date: 2002-11-19
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:forming a high impurity concentration layer of a first conductivity type in at least a part of a semiconductor substrate of the first conductivity type; forming an epitaxial Si layer of the first conductivity type in contact with said high impurity concentration layer by an epitaxial growth method on a main surface of the semiconductor substrate; selectively removing the epitaxial Si layer and the semiconductor substrate to form a trench, followed by burying an insulating film for element isolation in said trench; and forming a source region and a drain region in a region where the insulating film for element isolation is not formed, the epitaxial Si layer being interposed between the source region and the drain region, wherein at least a part of undersurfaces of the source region and the drain region is formed at a position lower than an interface between an undersurface of said epitaxial Si layer and a surface of said high impurity concentration layer.