Patent ID: 7790487

Claim:
A method of fabricating a photo sensor on an amorphous silicon TFT panel, comprising: providing a substrate comprising a TFT region and a sensor region; forming a first patterned conductive layer on the substrate, the first patterned conductive layer comprising a gate electrode of a TFT disposed in the TFT region; forming a gate insulating layer on the substrate and the gate electrode; forming a patterned amorphous silicon layer on the gate insulating layer corresponding to the gate electrode; forming a second patterned conductive layer on the substrate, wherein the second patterned conductive layer comprises a source electrode, a drain electrode and a bottom electrode of a photo sensor, the source electrode and the drain electrode are disposed above the gate electrode, and the bottom electrode is disposed in the sensor region; forming a patterned silicon-rich dielectric layer on the substrate, the patterned silicon-rich dielectric layer comprising being disposed in the sensor region and electrically connected to the bottom electrode, and the patterned silicon-rich dielectric layer at least partially exposing the drain electrode; and forming a patterned transparent conductive layer on the substrate, the patterned transparent conductive layer at least comprising a top electrode disposed in the sensor region.