Patent ID: 6724049
Filing Date: 2004-04-20
Classification: H01L

Abstract:
A semiconductor device comprising:an element-forming layer formed on a buried insulating film of a semiconductor substrate; a gate insulating film formed on the element-forming layer; a gate electrode formed on the gate insulating film; a source region and a drain region formed in the element-forming layer, corresponding to two sides of the gate electrode, respectively, and lying at a level higher than a surface of the element-forming layer; and an insulating film distinct from the buried insulating film and formed on a first part of the buried insulating film, which lies below the source and drain regions, said insulating film contacting bottom surfaces of the source and drain regions, wherein the element-forming layer has a first part and a second part, the first part of the element-forming layer corresponds to the source and drain regions, the second part of the element-forming layer is located below the gate electrode and is thicker than the first part, and the source and drain regions have bottom surfaces that contact the insulating film.