Patent ID: 9634054
Date: 2017-04-25
CPC Classifications: H01L,H04N

Claim:
1. An image sensor, comprising: a semiconductor substrate, including: a plurality of photoelectric conversion elements, which includes at least a first photoelectric conversion element and a second photoelectric conversion element; a charge-voltage conversion element, wherein the charge-voltage conversion element is shared by the first photoelectric conversion element and second photoelectric conversion element; a first transfer transistor connected between the first photoelectric conversion element and the charge-voltage conversion element; a second transfer transistor connected between the second photoelectric conversion element and the charge-voltage conversion element; a first charge accumulation element, wherein at least a portion of the first charge accumulation element overlaps a charge accumulation region of the first photoelectric conversion element; and a second charge accumulation element, wherein at least a portion of the second charge accumulation element overlaps a charge accumulation region of the second photoelectric conversion element, wherein each of the plurality of photoelectric conversion elements is configured to receive light entered from a first surface of the semiconductor substrate, and wherein the first and second charge accumulation elements are disposed on a second surface of the semiconductor substrate, the second surface is opposed to the first surface.