Patent ID: 8004044

Claim:
A semiconductor device comprising: a first transistor of a first conductivity type provided on a first active region of a semiconductor region; and a second transistor of a second conductivity type provided on a second active region of the semiconductor region, wherein the second active region is separated from the first active region by a device isolation region, wherein the first transistor includes a first gate insulating film formed on the first active region and containing a high-k material and a first metal, and a first gate electrode including a lower conductive film formed on the first gate insulating film, a first conductive film formed on the lower conductive film, and a first silicon film formed on the first conductive film, the second transistor includes a second gate insulating film formed on the second active region and containing the high-k material and a second metal, and a second gate electrode including a second conductive film formed on the second gate insulating film and made of the same material as the first conductive film, and a second silicon film formed on the second conductive film.