Patent ID: 6498374
Filing Date: 2002-12-24
Classification: H01L

Abstract:
A semiconductor device, comprising:a semiconductor substrate; a gate insulating film on said semiconductor substrate, the gate insulating film containing nitrogen; a gate electrode on said gate insulating film; and an oxide film on a surface of said gate electrode and said semiconductor substrate, wherein said gate insulating film has a first portion under a center portion of said gate electrode and a second portion under an edge of said gate electrode, said second portion being thicker than said first portion, a first surface and a second surface of said first portion defining first and second parallel lines that intersect said second portion, said first parallel line being between said first portion and said substrate, said second parallel line being between said first portion and said gate electrode, a thickness of said second portion between said first parallel line and said substrate being one third or less than a thickness of said second portion between said second parallel line and said gate electrode, wherein said gate insulating film is an oxide film containing nitrogen at a concentration ranging from about 2 to 10%.