Patent ID: 9209306
Filing Date: 2015-12-08
Classification: G02F,H01L

Abstract:
1. A thin film transistor comprising: an insulating substrate; a gate electrode provided on an upper surface of the insulating substrate; a gate insulating film formed so as to cover the gate electrode; an oxide semiconductor layer provided on the gate insulating film; a channel protective layer provided at least on an upper surface of the oxide semiconductor layer; and a source electrode and a drain electrode provided so as to come into contact with the oxide semiconductor layer, wherein the channel protective layer is formed such that the film density of a portion provided so as to come into contact with the oxide semiconductor layer is higher than the film density of a portion distant from the oxide semiconductor layer, wherein the channel protective layer is formed of a single thin film layer, and wherein in the channel protective layer, the film density of a region provided so as to come into contact with the oxide semiconductor layer is higher than the film density of other regions, and the film density of the channel protective layer continuously and gradually decreases in a film thickness direction of the region provided so as to come into contact with the oxide semiconductor layer.