Image TFT array of a direct X-ray image sensor and method of fabricating the same

A method of fabricating an image TFT array of a direct X-ray image sensor, comprising:

• providing a substrate having a capacitor region and a transistor region;
• forming a first transparent conductive layer attached on the substrate in the capacitor region;
• forming a gate electrode in the transistor region and a common line in the capacitor region and on the first transparent conductive layer;
• forming an insulation layer in the capacitor region and the transistor region;
• forming a semiconducting island on the insulation layer in the transistor region;
• forming a source electrode and a drain electrode on the semiconducting island to form a thin film transistor (TFT) structure;
• forming a passivation layer in the transistor region and defining the passivation layer to expose a part of a surface of the source electrode;
• and
• forming a second transparent conductive layer overlapping the first transparent conductive layer in the capacitor region, wherein the second transparent conductive layer of the capacitor region is electrically connected to the source electrode, and simultaneously forming a third transparent conductive layer overlapping a channel region between the source electrode and the drain electrode.