Patent ID: 8692250

Claim:
A method for fabricating a thin film transistor (TFT) array substrate, comprising: providing a substrate having a pixel region and a photosensitive region formed thereon; forming a first patterned conductive layer on the substrate, wherein the first patterned conductive layer comprises a gate electrode disposed in the pixel region and a first electrode disposed in the photosensitive region, and a photosensitive dielectric layer is formed on the first electrode, the photosensitive dielectric layer is a silicon rich dielectric layer comprising a silicon rich oxide layer, a silicon rich nitride layer, or a silicon rich carbide layer, the silicon rich oxide is represented with a molecular formula of SiOx, the silicon rich nitride is represented with a molecular formula of SiNy, and the silicon rich carbide is represented with a molecular formula of SiCz, wherein 0.01≦y≦1.33 and 0.01≦z≦1; forming a gate insulation layer on the substrate for covering the gate electrode, the photosensitive dielectric layer and the first electrode; forming a patterned semiconductor layer on the gate insulation layer above the gate electrode; forming a source electrode and a drain electrode on the patterned semiconductor layer at two sides of the gate electrode, respectively, wherein the gate electrode, the source electrode, and the drain electrode constitute a TFT; and forming a second electrode on the photosensitive dielectric layer, wherein the first electrode, the photosensitive dielectric layer and the second electrode constitute a photosensor.