Patent ID: 7635866

Claim:
A semiconductor device comprising: a substrate having an insulating surface; a heat absorbing layer formed over the substrate; an insulating film formed over the heat absorbing layer; and an active layer formed over the insulating film, having a first channel forming region and a second channel forming region, wherein a channel length direction of the first channel forming region is different from a channel length direction of the second channel forming region, wherein the channel length direction of the first channel forming region is arranged in parallel with a first side of the heat absorbing layer, wherein the first side is proximate to the first channel forming region, wherein the channel length direction of the second channel forming region is arranged in parallel with a second side of the heat absorbing layer, wherein the second side is proximate to the second channel forming region, and wherein a thermal conductivity of the heat absorbing layer is larger than those of the substrate and the insulating film.