Patent ID: 9735284
Date: 2017-08-15
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: an oxide semiconductor layer; a first conductive layer electrically connected to the oxide semiconductor layer; a second conductive layer electrically connected to the oxide semiconductor layer; an insulating layer over the first conductive layer and the second conductive layer; and a third conductive layer over the insulating layer, wherein the third conductive layer overlaps the oxide semiconductor layer, the first conductive layer and the second conductive layer, wherein the oxide semiconductor layer includes indium, zinc and gallium, wherein the third conductive layer includes a conductive metal oxide, wherein the oxide semiconductor layer includes a first region and a second region below the first region, wherein the second region has a lower crystallinity than the first region, and wherein the first conductive layer and the second conductive layer are in direct contact with the second region.