Patent ID: 7884407
Filing Date: 2011-02-08
Classification: H01L

Abstract:
1. A semiconductor device having a first region including a silicide layer and a second region without a silicide layer being formed, wherein said second region includes a second field effect transistor and is covered by a lower layer insulating film of a plurality of insulating films, and a sidewall composed of an upper layer insulating film of said plurality of insulating films is formed exclusively at a side of a gate electrode of said second field effect transistor, and wherein a sidewall which does not include silicon nitride is formed exclusively at a side of a gate electrode of a first field effect transistor formed in said first region, and said silicide layer is formed at a source/drain region or in a source/drain region and a gate electrode of said first field effect transistor, wherein said plurality of insulating films include a first insulating film, a second insulating film, and a third insulating film; the lower layer insulating film covering said second region is comprised of said first and second insulating films; and said upper layer is comprised of said third insulating film, wherein said first and third insulating films are silicon oxide films and said second insulating film is formed by a silicon nitride film.