Patent ID: 8592933

Claim:
A photoelectric conversion device comprising: a circuit unit formed on a substrate; a lower electrode layer disposed on the circuit unit, a compound semiconductor thin film of chalcopyrite structure disposed on the lower electrode layer; a buffer layer disposed on the compound semiconductor thin film; and a transparent electrode layer disposed on the buffer layer, wherein the lower electrode layer, the compound semiconductor thin film, the buffer layer, and the transparent electrode layer are laminated one after another on the circuit unit, and when a reverse bias voltage is applied between the transparent electrode layer and the lower electrode layer, multiplication of electric charge generated by photoelectric conversion is generated by impact ionization within the compound semiconductor thin film of the chalcopyrite structure, wherein the circuit unit includes a transistor by which the lower electrode layer is connected to a gate, an anode of a photo diode composed of the lower electrode layer, the compound semiconductor thin film, and the transparent electrode layer for every pixel is connected to a gate electrode of the transistor, and the transparent electrode layer being a cathode electrode of the photo diode is formed on the whole surface of a plurality of the pixels in one piece and is electrically common.