Patent ID: 9601631
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising a transistor, the transistor comprising: a gate electrode layer; an oxide semiconductor layer over the gate electrode layer; a gate insulating layer interposed between the gate electrode layer and the oxide semiconductor layer; a first conductive layer over and in contact with the oxide semiconductor layer; a second conductive layer over and in contact with the oxide semiconductor layer; an oxide insulating film over the oxide semiconductor layer, the first conductive layer and the second conductive layer, the oxide insulating film being capable of supplying oxygen; and an aluminum oxide film over the oxide insulating film, the aluminum oxide film having a film density of 3.2 g/cm wherein the first conductive layer and the second conductive layer do not overlap each other, wherein the oxide semiconductor layer comprises indium, gallium and zinc, wherein each of the first conductive layer and the second conductive layer is formed using a first metal having a higher oxidation resistance than molybdenum, and wherein the first metal is ruthenium.