Patent ID: 9612498
Date: 2017-04-04
CPC Classifications: G02F,H01L

Claim:
1. A semiconductor device comprising: a substrate; a first electrode on the substrate; a first insulation film on the first electrode and the substrate so as to cover the first electrode; a semiconductor film made of an oxide semiconductor and including a channel and a first edge portion, the semiconductor film being located on the first insulation film and overlapping the first electrode so that the first edge portion projects outwardly from the first electrode; an etching stopper film including an insulation film on the semiconductor film and the first insulation film, the etching stopper film covering the channel, the etching stopper film including a hole exposing a surface of a portion of the semiconductor film adjacent to the channel and the first edge portion; and a second electrode disposed on the semiconductor film to cover the surface of the portion of the semiconductor film exposed through the hole and in contact with and between both a terminating end of the first edge portion and an edge of the etch stopper film that defines a periphery of the hole opposite the terminating end of the first edge portion, wherein the first edge portion is in contact with and electrically connected to the second electrode and not in contact with the etching stopper film, an entire surface of the portion of the semiconductor film exposed through the hole is covered by the second electrode, and the first electrode is a gate electrode, and the second electrode is a metal drain electrode.