Patent ID: 6703282
Filing Date: 2004-03-09
Classification: H01L

Abstract:
A method of forming a metal oxide semiconductor field effect transistor (MOSFET), device on a semiconductor substrate, comprising the steps offorming a gate insulator layer on said semiconductor substrate; forming an insulator capped gate structure on said gate insulator layer wherein said insulator gate capped gate structure is comprised of an overlying silicon oxynitride layer on a silicon nitride layer, and wherein the silicon oxynitride layer is obtained via an anneal procedure performed in an oxygen ambient after formation of the silicon nitride layer; forming a lightly doped source/drain region in an area of said semiconductor substrate not covered by said insulator capped gate structure; forming a composite insulator spacer on the sides of said insulator capped gate structure; and forming a heavily doped source/drain region ion an area of said semiconductor substrate not covered by said insulator capped gate structure, or by said composite insulator spacer.