Patent ID: 6977417
Filing Date: 2005-12-20
Classification: H01L,H04M,H04W

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a gate electrode formed over said semiconductor substrate while placing a gate insulating film in between; a pair of impurity-diffused layers formed in the surficial portion of said semiconductor substrate on both sides of said gate electrode; each of said impurity-diffused layers comprising: a shallow first region partially overlapping the bottom portion of said gate electrode; a second region being deeper than said first region and overlapping said first region; and a third region having introduced therein a diffusion-suppressive substance for suppressing diffusion of an impurity contained in said first region so as to have concentration peaks at least at a first position in the vicinity of the interface between a constitutional member composed of said gate electrode and said gate insulating film and said semiconductor substrate and at a second position deeper than said first region.