Patent ID: 7388229

Claim:
A thin film transistor substrate comprising: a substrate; a first conductive layer formed above the substrate, the first conductive layer including a line electrode; an anti-diffusion layer deposited to cover the first conductive layer; a semiconductor layer formed in island shape above the anti-diffusion layer, the semiconductor layer including a channel region, a source region and a drain region; a gate insulating layer deposited to cover the semiconductor layer; a second conductive layer including a gate electrode formed above the channel region with the gate insulating layer interposed therebetween; an interlayer insulating layer deposited to cover the second conductive layer; and a third conductive layer formed above the interlayer insulating layer, in a first contact hole penetrating through the interlayer insulating layer and the gate insulating layer to reach the semiconductor layer, and in a second contact hole penetrating through the interlayer insulating layer, the gate insulating layer, and the anti-diffusion layer to reach the first conductive layer, the third conductive layer including a pixel electrode formed in island shape above the interlayer insulating layer.