Patent ID: 8803149
Filing Date: 2014-08-12
Classification: H01L

Abstract:
1. A semiconductor device comprising: an oxide semiconductor layer including a first region and a second region, the first region including a channel region; a hydrogen barrier layer selectively over the second region of the oxide semiconductor layer so as to expose at least a part of the first region of the oxide semiconductor layer; a gate insulating layer adjacent to the oxide semiconductor layer; a gate electrode adjacent to the oxide semiconductor layer with the gate insulating layer interposed therebetween; and a conductive layer in contact with the second region of the oxide semiconductor layer, wherein the hydrogen barrier layer overlaps with the gate insulating layer over the second region of the oxide semiconductor layer, wherein the first region includes hydrogen at a lower concentration than the second region, wherein the first region includes oxygen at a higher concentration than the second region, and wherein the second region of the oxide semiconductor layer is interposed between the hydrogen barrier layer and the conductive layer, and wherein the hydrogen barrier layer comprises dielectric material.