Patent ID: 7504698

Claim:
A semiconductor device comprising: a semiconductor substrate having an N-channel transistor forming region and a P-channel transistor forming region; a first gate electrode provided on the N-channel transistor forming region of the semiconductor substrate; and a second gate electrode provided on the P-channel transistor forming region of the semiconductor substrate, wherein the first gate electrode includes an N-type silicon layer containing N-type impurity, a first silicide layer formed on the N-type silicon layer, a first silicon film formed on the first silicide layer, a first metal nitride layer formed on the first silicon film, and a first metal layer formed on the first metal nitride layer, and the second gate electrode includes a P-type silicon layer containing P-type impurity, a second silicide layer formed on the P-type silicon layer and having a plurality of silicide grains which are discontinuously disposed in a direction substantially parallel with the surface of the semiconductor substrate, a second silicon film continuously formed on the surface of the P-type silicon layer exposed on the discontinuous part of the second silicide layer and on the surface of the second silicide layer, a second metal nitride layer formed on the second silicon film, and a second metal layer formed on the second metal nitride layer.