Patent ID: 9209307
Filing Date: 2015-12-08
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first gate electrode layer; a first gate insulating layer over and in contact with the first gate electrode layer; an oxide semiconductor layer overlapping with the first gate electrode layer with the first gate insulating layer interposed therebetween; a source electrode layer and a drain electrode layer electrically connected to the oxide semiconductor layer; a second gate insulating layer over the source electrode layer and the drain electrode layer; a second gate electrode layer overlapping with the oxide semiconductor layer with the second gate insulating layer interposed therebetween; and a protective insulating layer covering the source electrode layer, the drain electrode layer, and the second gate electrode layer, wherein the first gate insulating layer and the protective insulating layer each include an aluminum oxide film, and wherein the first gate insulating layer and the protective insulating layer are in contact with each other in a region where the source electrode layer, the drain electrode layer, and the second gate electrode layer do not exist.