Patent ID: 9548328
Date: 2017-01-17
CPC Classifications: H01L

Claim:
1. A solid-state image sensor comprising: a substrate having a light-receiving surface; a charge accumulation portion that forms part of a photoelectric conversion element; a charge holding portion and a charge detection unit which are arranged at positions deeper than the charge accumulation portion from the light-receiving surface; a first transfer portion configured to transfer charges generated by the photoelectric conversion element to the charge holding portion along a depth direction of the substrate; and a second transfer portion configured to transfer the charges held by the charge holding portion to the charge detection unit, wherein in a planar view of the light-receiving surface, the charge detection unit is arranged at positions overlapping the charge holding portion, and in the depth direction of the substrate, the charge accumulation portion is arranged at a region shallower than a first depth from the light-receiving surface, either of the charge holding portion and the charge detection unit is arranged at a region deeper than a second depth from the light-receiving surface, and the other of the charge holding portion and the charge detection unit is arranged at the region between the first depth and the second depth.