Patent ID: 8148185

Claim:
A method for fabricating an active device array substrate, comprising: providing a substrate having a display area and a sensing area; forming a first patterned conductor layer on the display area of the substrate; forming a gate insulator on the substrate to cover the first patterned conductor layer; forming a patterned semiconductor layer on the gate insulator, wherein the patterned semiconductor layer is disposed above the first patterned conductor layer; forming a second patterned conductor layer and a patterned photosensitive dielectric layer on the patterned semiconductor layer, wherein the second patterned conductor layer comprises a source electrode, a drain electrode and a lower electrode, the source electrode and the drain electrode are disposed in the display area and cover a part of the patterned semiconductor layer, the lower electrode is disposed in the sensing area, the patterned photosensitive dielectric layer covers the second patterned conductor layer, and the patterned photosensitive dielectric layer comprises an interface protection layer disposed on the source electrode and the drain electrode and a photo-sensing layer disposed on the lower electrode; forming a passivation layer on the substrate, wherein the passivation layer has a first contact window to expose one of the source electrode and the drain electrode and a second contact window to expose the photo-sensing layer; and forming a third patterned conductor layer on the passivation layer, wherein the third patterned conductor layer comprises a pixel electrode and an upper electrode, the pixel electrode is electrically connected to one of the source electrode and the drain electrode through the first contact window, and the upper electrode covers the photo-sensing layer through the second contact window.