Patent ID: 7582499

Claim:
A method of manufacturing photo sensor, comprising: providing a substrate having a switching element region and an electronic element region; forming a gate on the switching element region of the substrate; forming a gate dielectric layer, a semiconductor layer, and an electrical property enhancement layer in sequence to cover the gate and the substrate; patterning the electrical property enhancement layer and the semiconductor layer to form a channel region on the gate dielectric layer above the gate; forming a first conductive layer, a plurality of element function layers and a second conductive layer in sequence to cover the gate dielectric layer and the channel region; patterning the second conductive layer and the element function layers wherein the element function layers patterned form a diode stack on the first conductive layer of the electronic element region, and the second conductive layer patterned forms a photoelectrode on the diode stack; patterning the first conductive layer to form a source/drain above the opposite sides of the channel region and expose a part of the electrical property enhancement layer; forming a insulating layer to cover the source/drain, the diode stack and the photoelectrode wherein the material of the insulating layer is a photoresist; patterning the insulating layer to form an opening in the insulating layer and the opening exposes the photoelectrode; forming a third conductive layer to cover the insulating layer and the photoelectrode; and patterning the third conductive layer so that the third conductive layer patterned covers a part of the insulating layer above the source/drain and connects to one side of the photoelectrode near the source/drain along the opening.