Patent ID: 9659967
Date: 2017-05-23
CPC Classifications: H01L

Claim:
1. A thin-film transistor comprising: a substrate comprising a major surface; a gate electrode formed over the substrate; a gate insulating layer formed over the gate electrode and the substrate; an oxide semiconductor layer formed over the gate insulating layer and comprising a source section and a drain section, wherein at least a portion of the oxide semiconductor layer overlaps the gate electrode when viewed in a direction perpendicular to the major surface; a first electrode formed over the substrate and electrically connected to one of the source and drain sections; a second electrode formed over the substrate and electrically connected to the other of the source and drain sections; a first barrier layer disposed between the oxide semiconductor layer and the first electrode and a second barrier layer disposed between the first barrier layer and the first electrode, wherein at least part of the first electrode does not overlap with the oxide semiconductor layer when viewed in the direction perpendicular to the major surface, wherein a first end portion of the first barrier layer and a first end portion of the second barrier layer are aligned with each other, wherein the first end portion of the first barrier layer and the second end portion of the second barrier layer physically and directly contact with the gate insulating layer; and wherein the first barrier layer directly contacts the oxide semiconductor layer.