Patent ID: 7049665
Filing Date: 2006-05-23
Classification: H01L

Abstract:
1. A semiconductor device having an NMOS and a PMOS, comprising: each gate electrode of said NMOS and PMOS containing a polycrystalline silicon film formed on a gate insulating film and a metallic nitride film formed on said polycrystalline silicon film; said polycrystalline silicon film of said PMOS containing a p-type impurity; said polycrystalline silicon film of said NMOS containing a p-type impurity and an n-type impurity; and said n-type impurity contained in said polycrystalline silicon film of said NMOS being segregated to a side of an interface of said polycrystalline silicon film and said gate insulating film, and said p-type impurity contained in said NMOS being segregated to a side of an interface of said metallic nitride film and said polycrystalline silicon film.