Patent ID: 7119408
Filing Date: 2006-10-10
Classification: H01L

Abstract:
1. A semiconductor device having a first MIS transistor provided in a semiconductor layer, wherein the first MIS transistor comprises: a first gate insulating film provided on the semiconductor layer; a first gate electrode provided on the first gate insulating film; first extension regions containing a first dopant of a first conductivity type and provided in regions of the semiconductor layer located below sides of the first gate electrode, respectively; dopant regions containing a second dopant of the first conductivity type and provided in regions of the semiconductor layer located below the sides of the first gate electrode and deeper than the first extension region, respectively; and nitrogen diffusion layers provided on the first extension regions and in an upper surface portion of the semiconductor layer, respectively, wherein in the nitrogen diffusion layers, their entire bottom surface and their side surface closer to the first gate electrode are surrounded by the first extension region and located within surface boundaries thereof, respectively.