Patent ID: 9647136
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A Thin Film Transistor (TFT) comprising: a substrate; a semiconductor layer disposed on the substrate; a first source electrode and a first drain electrode spaced apart from each other on the semiconductor layer; a channel area disposed in the semiconductor layer between the first source electrode and the first drain electrode; an etching prevention layer disposed on the channel area, the first source electrode, and the first drain electrode, wherein the etching prevention layer contacts a portion of a top surface of the first source electrode and a portion of a top surface of the first drain electrode; a second source electrode in contact with the first source electrode, and a second drain electrode in contact with the first drain electrode; a protection film disposed on the second source electrode and the second drain electrode and having a contact hole formed in the protection film exposing the second drain electrode; and a pixel electrode disposed on the protection film and electrically connected to the second drain electrode through the contact hole, wherein the etching prevention layer overlaps the contact hole.