Patent ID: 9202925
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first insulating layer comprising aluminum oxide; an oxide semiconductor layer over the first insulating layer; a source electrode and a drain electrode that are electrically connected to the oxide semiconductor layer; a gate insulating layer that is over the source electrode and the drain electrode and overlaps with the oxide semiconductor layer; a gate electrode that overlaps with the oxide semiconductor layer with the gate insulating layer provided therebetween; and a second insulating layer comprising aluminum oxide that covers the source electrode, the drain electrode, and the gate electrode, wherein the first insulating layer and the second insulating layer each include an oxygen-excess region, and wherein the first insulating layer and the second insulating layer are in contact with each other in a region where the source electrode, the drain electrode, and the gate electrode are not provided.