Patent ID: 9564461
Date: 2017-02-07
CPC Classifications: G01T,H01L

Claim:
1. A radiation image-pickup device comprising: a drive substrate including a transistor used to read, from each of a plurality of pixels, signal charge based on radiation; a charge collection electrode provided on the drive substrate, for each of the pixels; a conversion layer formed on the charge collection electrode, and configured to generate the signal charge by absorbing radiation; a counter electrode provided on the conversion layer; and a first conductive film disposed between the drive substrate and the charge collection electrode, disposed to face at least a part of the charge collection electrode, and included in a first capacitive element configured to retain the signal charge, wherein the transistor includes a semiconductor layer configured using poly-silicon, a first gate electrode and a second gate electrode disposed to face each other, with the semiconductor layer interposed therebetween, a first gate insulating film and a second gate insulating film, the first gate insulating film being formed between the semiconductor layer and the first gate electrode, and the second gate insulating film being formed between the semiconductor layer and the second gate electrode, and a source electrode and a drain electrode electrically connected to the semiconductor layer, and another capacitive element configured to retain the signal charge is formed in a same layer as the transistor, the other capacitive element including a second capacitive element including a second conductive film, the semiconductor layer, and the first gate insulating film, the second conductive film being formed in a same layer as the first gate electrode, and a third capacitive element including a third conductive film, the semiconductor layer, and the second gate insulating film, the third conductive film being formed in a same layer as the second gate electrode.