Patent ID: 7413968

Claim:
A method of manufacturing a semiconductor device comprising: a first step for forming a silicon film on a first region and a second region, respectively of a semiconductor substrate; a second step for selectively ion-implanting P-type impurities into the silicon film in the first region; a third step for carrying out a first annealing, thereby activating the P-type impurities implanted in the silicon film; a fourth step for selectively ion-implanting N-type impurities into the silicon film in the second region, after the third step; a fifth step for forming a silicide film on the silicon film according to a CVD method, after the fourth step; a sixth step for carrying out a second annealing, thereby discharging gas contained in the silicide film and activating the N-type impurities, after the fifth step; a seventh step for forming a barrier metal film and a metal film in this order on the silicide film; and an eighth step for patterning the metal film, the barrier metal film, the silicide film and the silicon film, thereby forming a P-type polymetal gate electrode in the first region and an N-type polymetal gate electrode in the second region.