Patent ID: 7064400
Filing Date: 2006-06-20
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, said gate insulating film being a first insulating film having a higher dielectric constant than that of a silicon dioxide film, and having a laminated structure of a first layer comprising a compound of metal and oxygen, and a second layer comprising a compound of metal, oxygen and silicon, said first layer being arranged between said gate electrode and said second layer, and the end portions in the gate length direction of said first layer being positioned inwardly from the end portions of said gate electrode, the end portions in the gate length direction of said second layer being positioned inwardly from said end portions of said gate electrode and inwardly from said end portions of said first layer, and said end portions of said first layer and said end portions of said second layer being positioned in a region in which said gate electrode overlaps with said source and drain regions in a plan configuration.