Patent ID: 6399962
Filing Date: 2002-06-04
Classification: H01L

Abstract:
An X-ray image sensor, comprising:a substrate; a gate electrode on the substrate; a first insulation film on the substrate that covers the gate electrode; an amorphous silicon film formed on the first insulation film over the gate electrode; a doped amorphous silicon film defining a channel region for the amorphous silicon film on the amorphous silicon film; source and drain electrodes on the doped amorphous silicon film that are spaced apart from each other; a ground line on the first insulation film and that is spaced apart from the source and gate electrodes; a second insulation film covering the ground line, the source and drain electrodes, amorphous silicon film, the channel region, and the first insulation film, the second insulation film including a first contact hole that exposes a portion of the ground line and a second contact hole that exposes a portion of the source electrode; a first capacitor electrode on the second insulation film, the first capacitor electrode having an electrical connection with the ground line through the first contact hole; 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; a dielectric layer covering the second insulation film, the first capacitor electrode, and the electron transport electrode, the dielectric layer having a third contact hole that exposes a portion of the electron transport electrode; and a second capacitor electrode on the dielectric layer, the second capacitor electrode having an electrical connection with the electron transport electrode through the third contact hole.