Patent ID: 9704909
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. An image sensor comprising: a plurality of photoelectric conversion elements each including a charge accumulation region of a first conductivity type arranged in a semiconductor substrate; and an element isolation region arranged at least between the charge accumulation regions adjacent to each other, wherein the element isolation region includes an insulator isolation portion arranged on an inner side of a trench on a surface of the semiconductor substrate, and includes a semiconductor region of a second conductivity type opposite to the first conductivity type, and the semiconductor region is arranged along a side surface of the insulator isolation portion, wherein a gettering region is arranged between the semiconductor region and the insulator isolation portion, and the gettering region is arranged along at least a part of the side surface of the insulator isolation portion between the charge accumulation region and the side surface of the insulator isolation portion, and wherein the gettering region contains at least one of carbon or germanium.