Patent ID: 7193281
Filing Date: 2007-03-20
Classification: H01L

Abstract:
1. A semiconductor device having a semiconductor substrate and a field effect transistor formed on said semiconductor substrate, said field effect transistor comprising source and drain regions formed in said semiconductor substrate, a gate insulating film formed on said semiconductor substrate, and a gate electrode disposed on said gate insulating film, and said gate insulating film being comprised of an insulating film having a higher dielectric constant than that of a silicon dioxide film, said gate insulating film being an oxynitride of at least one metal selected from the group consisting of titanium, tantalum, hafnium, zirconium, aluminum, lanthanum, and strontium, wherein end portions in a gate length direction of said gate insulating film are positioned inwardly from end portions of said gate electrode, and the end portions in the gate length direction of said gate insulating film are positioned in a region in which said gate electrode overlaps with the source region and the drain region in a plan configuration.