Patent ID: 8076192

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 first region and the second region; (b) forming a first metal film over the first insulating film; (c) removing the first metal film and the first insulating film formed over the second region; (d) after the step (c), forming a second insulating film over the second region and the first metal film over the first region; (e) forming a second metal film over the second insulating film, wherein a second material composing the second metal film is different from a first material composing the first metal film; (f) patterning the second metal film and the second insulating film formed over the second region to form a second gate electrode and a second gate insulating film of the second MISFET; and (g) after the step (f), patterning the first metal film and the first insulating film formed over the first region to form a first gate electrode and a first gate insulating film of the first MISFET.