Patent ID: 7235849

Claim:
A semiconductor device comprising: a semiconductor substrate having a first device region and a second device region; a first transistor including a first gate electrode formed in the first device region with a first gate insulation film formed therebetween; a second transistor forming a pair with the first transistor and including a second gate electrode formed in the second device region with a second gate insulation film formed therebetween; a first metal layer formed over the first gate electrode with an insulation film formed therebetween, formed of a metal material having the property of occluding hydrogen and having a peripheral part positioned outer of a region where the first gate electrode and the first device region overlap each other; and a second metal layer formed over the second gate electrode with the insulation film formed therebetween, formed of a metal material having the property of occluding hydrogen and having a peripheral part positioned outer of a region where the second gate electrode and the second device region overlap each other, hydrogen termination of interfaces between the semiconductor substrate and the first and second gate insulation films by hydrogen annealing being suppressed, and the first metal layer and the second metal layer being electrically connected to each other.