Patent ID: 6660555
Filing Date: 2003-12-09
Classification: H01L

Abstract:
A method for fabricating an X-ray image sensor, comprising:forming a gate electrode on a substrate; forming a first insulation film over the substrate and the gate electrode; forming an amorphous silicon film on the first insulation film and over the gate electrode; forming a doped amorphous silicon film on the amorphous silicon film; forming source and drain electrodes on the doped amorphous silicon film such that the source and drain electrodes are spaced apart from each other; forming a channel region on the amorphous silicon layer by eliminating the doped amorphous silicon film between the source and drain electrodes; forming a ground line on the first insulation film such that the ground line is spaced from the source and gate electrodes; forming a second insulation film over the ground line, the channel region, the source and drain electrodes, and the first insulation film; forming first and second contact holes through the second insulation film such that a portion of the ground line is exposed by the first contact hole and a portion of the source electrode is exposed by the second contact hole; forming a first capacitor electrode on the second insulation film such that the first capacitor electrode is electrically connected to the ground line through the first contact hole; forming an electron transport electrode on the second insulation film, the electron transport electrode having an electrical connection with the source electrode through the second contact hole; forming a dielectric layer over the second insulation film, the first capacitor electrode and the electron transport electrode; forming a third contact hole through the dielectric layer; forming a second capacitor electrode on the dielectric layer such that the second capacitor electrode has an electrical connection with the electron transport electrode through the third contact hole; forming a light-sensitive material on the pixel electrode; and forming an X-ray transparent conductive electrode on the light-sensitive material.