Patent ID: 8741702
Filing Date: 2014-06-03
Classification: H01L

Abstract:
1. A semiconductor device comprising: a gate electrode layer; a gate insulating layer over the gate electrode layer; a first oxide semiconductor film over the gate insulating layer, the first oxide semiconductor film comprising oxygen and a metal; and a source electrode layer and a drain electrode layer over the first oxide semiconductor film, each of the source electrode layer and the drain electrode layer including an inner edge opposed to each other, wherein the first oxide semiconductor film comprises a first region overlapping with the inner edge of the source electrode layer, a second region overlapping with the inner edge of the drain electrode layer, and a third region between the first region and the second region, wherein a thickness of the third region is thinner than those of the first region and the second region, wherein the third region comprises a slanted surface adjacent to one of the inner edges of the source electrode layer and the drain electrode layer, and wherein a taper angle of the slanted surface is smaller than one of taper angles of the inner edges of the source electrode layer and the drain electrode layer.