Patent ID: 6774441
Filing Date: 2004-08-10
Classification: H01L

Abstract:
A semiconductor device, comprising:a semiconductor substrate having a main surface; a gate electrode provided on a main surface of said semiconductor substrate with an insulating film interposed; a first sidewall insulating film having two layers: a first layer of silicon oxide on a side surface of said gate electrode and having a lower portion extending on the main surface of said semiconductor substrate; and a second layer of silicon nitride on said silicon oxide film and having a lower surface over the lower portion of the first layer of silicon oxide; a second sidewall insulating film provided to cover a surface of said first sidewall insulating film and having a lower part extending under the lower surface of the second layer of silicon nitride to fill in a removed portion of said silicon oxide film; source and drain regions provided at positions on a main surface of said semiconductor substrate where said gate electrode is arranged in between; and a metal silicide layer arranged above said source and drain regions and at a position farther than said second sidewall insulating film from said gate electrode.