Patent ID: 7601581

Claim:
A manufacturing method of a semiconductor device for forming a first MISFET over a first region of a semiconductor substrate and a second MISFET over a second region of the semiconductor substrate, which comprises the steps of: (a) forming a first insulating film over the semiconductor substrate including the first region and the second region; (b) forming a first conductor film over the first insulating film; (c) removing the first conductor film and the first insulating film formed over the second region; (d) after the step (c), forming a second insulating film over the semiconductor substrate including the second region and the first conductor film including the first region; (e) forming a second conductor film over the second insulating film; (f) patterning the second conductor film and the second insulating film to form a second gate electrode of the second MISFET in the second region; and (g) after the step (f), patterning the first conductor film and the first insulating film formed in the first region to form a first gate electrode of the first MISFET in the first region.