Patent ID: 9721971
Date: 2017-08-01
CPC Classifications: G02F,G09G,H01L

Claim:
1. A semiconductor device comprising: a substrate comprising a top surface; a gate electrode layer over the substrate, and comprising a top surface and a side surface, the side surface having an inclination with respect to the top surface of the substrate; an oxide semiconductor layer over the substrate with the gate electrode layer interposed therebetween, and comprising a first portion facing the top surface of the gate electrode layer, and a second portion inclined in response to the inclination of the side surface of the gate electrode layer; a gate insulating layer between the gate electrode layer and the oxide semiconductor layer; a source electrode layer and a drain electrode layer over and in electrical contact with the oxide semiconductor layer, wherein the oxide semiconductor layer has crystallinity, and wherein c-axis of crystals of the oxide semiconductor layer are substantially perpendicular to a surface of the oxide semiconductor layer in both the first portion and the second portion.