Patent ID: 8552507

Claim:
A semiconductor device comprising: a p-channel-type field-effect transistor in a first region of a semiconductor substrate; and an n-channel-type field-effect transistor in a second region of the semiconductor substrate, wherein the p-channel-type field-effect transistor includes a first gate electrode formed on the semiconductor substrate so as to interpose a first gate insulating film formed thereon, the first gate insulating film includes a first insulating film and a first high-dielectric film sequentially formed on the semiconductor substrate, the first high-dielectric film is formed of an insulating film mainly made of hafnium and oxygen with containing aluminum, titanium, or tantalum, the n-channel-type field-effect transistor includes a second gate electrode formed on the semiconductor substrate so as to interpose a second gate insulating film formed thereon, the second gate insulating film includes the first insulating film and a second high-dielectric film sequentially formed on the semiconductor substrate, and the second high-dielectric film is formed of an insulating film mainly made of hafnium, silicon, and oxygen with containing an element of any of group Ia, group IIa, and group IIIa.