Patent ID: 8742508

Claim:
A three dimensional FET device structure comprising: a plurality of three dimensional FET devices each comprising an insulating base, a three dimensional fin oriented perpendicularly to the insulating base, a gate comprising a gate dielectric wrapped around the three dimensional fin and a gate conductor wrapped around the gate dielectric and extending perpendicularly to the three dimensional fin, the three dimensional fin having a device width being defined as the circumference of the three dimensional fin in contact with the gate dielectric; at least a first of the three dimensional FET devices having a first device width and the fin of the first of the three dimensional FET devices having a flat surface in contact with the insulating base; and at least a second of the three dimensional FET devices having a second device width such that the first device width being different than the second device width and the fin of the second of the three dimensional FET devices having a flat surface in contact with the insulating base; wherein the fin of at least one of the first and second three dimensional FET devices having a rounded surface opposite the flat surface in contact with the insulating base; and wherein the fin of the first of the three dimensional FET devices having a rectangular cross section and the fin of the second of the three dimensional FET devices having a semicircular cross section.