Patent ID: 7605442

Claim:
A semiconductor device comprising: a semiconductor substrate; a plurality of transistors provided in the semiconductor substrate, the plurality of transistors comprising a first conductivity type transistors and a second conductivity type transistors; and an isolation region for isolating the plurality of transistors to one another, the isolation region being comprised of a first insulation film formed on an inner wall of a trench formed in the semiconductor substrate, and a second insulation film filled on the first insulation film, wherein a first distance between an end face of the first insulation film, provided at a side of each of the first conductivity type transistors in the isolation region adjacent to each of the first conductivity type transistors, and a semiconductor substrate surface, is different from a second distance between the end face of the first insulation film, provided at a side of each of the second conductivity type transistors in the isolation region adjacent to the each of the second conductivity type transistors, and the semiconductor substrate surface.