Patent ID: 7067889

Claim:
A semiconductor integrated circuit device comprising: a first MISFET on a first region of a main surface of a semiconductor substrate; and a second MISFET on a second region of the main surface of the semiconductor substrate, wherein the first MISFET has a first sidewall spacer formed over the sidewall of a first gate electrode, of the first MISFET, wherein the first MISFET has a silicon nitride film formed between the first sidewall spacer and the first gate electrode, wherein a gate insulation film of the first MISFET comprises a first insulation film having a relative dielectric constant higher than that of silicon nitride, wherein a gate insulation film of the second MISFET comprises a second insulation film including silicon oxide, and wherein a film thickness, converted to that of a silicon oxide film, of the first insulation film is thinner than a film thickness, converted to that of a silicon oxide film, of the second insulation film.