Patent ID: 9728648
Date: 2017-08-08
CPC Classifications: H01L

Claim:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming an oxide insulating film; forming an oxide semiconductor film over the oxide insulating film; forming a gate insulating film over the oxide semiconductor film; forming a gate electrode layer overlapping with the oxide semiconductor film, over the gate insulating film; forming an insulating film including an aluminum oxide film to cover a top surface and a side surface of the gate electrode layer; forming an interlayer insulating layer over the oxide semiconductor film, the gate insulating film, the gate electrode layer, and the insulating film including the aluminum oxide film; forming an opening in the interlayer insulating layer to expose a part of the oxide semiconductor film and a part of a top surface and a part of a side surface of the insulating film including the aluminum oxide film; and forming a wiring layer in contact with the part of the oxide semiconductor film and the part of the top surface and the part of the side surface of the insulating film including the aluminum oxide film in the opening, wherein the interlayer insulating layer is in contact with the oxide semiconductor film, and wherein the wiring layer overlaps with the gate electrode layer with the insulating film including the aluminum oxide film and the interlayer insulating layer interposed therebetween.