Patent ID: 9023685
Filing Date: 2015-05-05
Classification: G02F,H01L

Abstract:
1. A fabrication method for a semiconductor device, for fabricating a semiconductor device including a semiconductor layer, a plurality of electrode portions each overlapping the semiconductor layer, and an insulating film placed between the plurality of electrode portions to lie on the semiconductor layer, the method comprising: a first step of forming an island-shaped oxide semiconductor layer part of which is covered with the insulating film; a second step of forming a conductive material layer to cover the oxide semiconductor layer and the insulating film; a third step of forming the plurality of electrode portions from the conductive material layer by photolithography and plasma dry etching, to expose part of the oxide semiconductor layer from the plurality of electrode portions and the insulating film; and a fourth step of removing the part of the oxide semiconductor layer exposed from the plurality of electrode portions and the insulating film to form the semiconductor layer.