Patent ID: 8294186

Claim:
A semiconductor device including a MISFET, comprising: a gate electrode of the MISFET formed over a semiconductor substrate; first insulating films each having a first region and a second region, the first regions being formed over both sides of the gate electrode and the second regions being formed over the semiconductor substrate; and second insulating films formed over both sides of the gate electrode and the first regions, and formed over the semiconductor substrate and the second region, wherein the first regions have first portions which extend in a first direction at least to a top of the gate electrode and second portions extending in said first direction near a bottom of the gate electrode, wherein a thickness of the first portions in a second direction orthogonal to said first direction is smaller than a thickness of the second portions in the second direction and is smaller than a thickness of the second regions in the first directions, and wherein a height of the second insulating films from the semiconductor substrate is less than a height of the first regions from the semiconductor substrate.