Photodetection device and electronic apparatus

An electronic apparatus comprising:

• a photodetection device;
• an optical lens that forms an image of image light from a subject on an imaging surface of the photodetection device;
• and
• a signal processing circuit that performs signal processing on a signal output from the photodetection device, wherein
• the photodetection device includes:
• a semiconductor layer having a first surface and a second surface located opposite to each other in a thickness direction;
• a photoelectric conversion region provided in the semiconductor layer, the photoelectric conversion region being partitioned by an isolation region extending in the thickness direction of the semiconductor layer;
• and
• a transfer transistor that transfers signal charge obtained as a result of photoelectric conversion in a photoelectric conversion unit to a charge holding unit,
• the photoelectric conversion region includes a main body provided with the photoelectric conversion unit and the charge holding unit, and a protrusion protruding from the main body toward the isolation region in plan view, and
• the transfer transistor includes a gate electrode provided over the main body and the protrusion of the photoelectric conversion region.