CPC H01L 27/14614 (2013.01) [H01L 27/14638 (2013.01); H01L 27/1464 (2013.01); H01L 27/14645 (2013.01); H01L 27/14647 (2013.01); H01L 31/1013 (2013.01); H04N 9/646 (2013.01); H04N 23/75 (2023.01); H04N 23/88 (2023.01); H04N 25/11 (2023.01); H04N 25/70 (2023.01); H04N 25/71 (2023.01); H04N 25/711 (2023.01); H04N 25/75 (2023.01); H10K 39/32 (2023.02)] | 12 Claims |
1. A light detecting device, comprising:
a first photoelectric conversion unit disposed above a substrate, the substrate comprising a first surface and a second surface opposite to the first surface, the first surface being disposed between the first photoelectric conversion unit and the second surface, and the first photoelectric conversion unit comprising:
a first electrode;
a second electrode disposed between the first electrode and the substrate; and
a photoelectric conversion layer disposed between the first electrode and the second electrode;
a second photoelectric conversion unit disposed in the substrate, the second photoelectric conversion unit overlapping the first photoelectric conversion unit in a plan view;
a gate electrode, at least a portion of the gate electrode being disposed in the substrate and overlapping the second photoelectric conversion unit in the plan view;
a wiring layer disposed between the first surface of the substrate and the second electrode; and
a first floating diffusion region disposed in the substrate, the first floating diffusion region being disposed at a side of the second surface,
wherein at least a portion of the second photoelectric conversion unit is disposed between the first surface and the gate electrode, and
wherein the first floating diffusion region is configured to receive a charge generated in the photoelectric conversion layer through at least the second electrode and the wiring layer.
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