Patent ID: 8729546
Filing Date: 2014-05-20
Classification: H01L

Abstract:
1. A semiconductor device comprising: a gate electrode layer over a substrate; a gate insulating layer over the gate electrode layer; an oxide semiconductor layer over the gate electrode layer with the gate insulating layer therebetween, the oxide semiconductor layer comprising indium; a source electrode layer over the oxide semiconductor layer; and a drain electrode layer over the oxide semiconductor layer, wherein an upper surface of the oxide semiconductor layer between the source electrode layer and the drain electrode layer is etched so that a portion of the oxide semiconductor layer is thinner than portions of the oxide semiconductor layer below the source electrode layer and the drain electrode layer, and wherein first portions of the oxide semiconductor layer extend beyond outer side edges of the source electrode layer and the drain electrode layer, and wherein the first portions of the oxide semiconductor layer are thinner than second portions of the oxide semiconductor layer, the second portions being below the source electrode layer and the drain electrode layer.