Patent ID: 7701018

Claim:
A semiconductor device comprising a first semiconductor region and a second semiconductor region, (a) wherein a plurality of field effect transistors are comprised of the first semiconductor region comprising a plurality of semiconductor layers protruding upward from a substrate and aligned such that the channel current direction is mutually parallel, a gate electrode(s) formed via insulating films such that the gate electrode(s) strides over the semiconductor layers and source/drain regions provided in the semiconductor layers on both sides of the gate electrode(s), whereby a channel region is formed in at least both side surfaces of the semiconductor layers, (b) wherein the second semiconductor region comprises semiconductor layers protruding upward from the substrate and placed, opposing the first semiconductor region at both ends in the direction perpendicular to a channel current direction and between the semiconductor layers in the first semiconductor region, and the side surfaces of the semiconductor layers facing the first semiconductor region are parallel to the channel current direction.