Patent ID: 9165966
Filing Date: 2015-10-20
Classification: H01L

Abstract:
1. A CMOS image sensor, comprising: a semiconductor substrate of a first conductivity type comprising a plurality of pixel regions, each of the plurality of pixel regions comprising a light-receiving region and a logic region around the light-receiving region; a photoelectric conversion layer of a second conductivity type in the light-receiving region of the semiconductor substrate; a first device isolation layer in the semiconductor substrate to define the light-receiving region of each of the pixel regions, wherein the first device isolation layer surrounds the photoelectric conversion layer when viewed from a plan view and is in contact with a sidewall of the photoelectric conversion layer; and a second device isolation layer in the semiconductor substrate to define the logic region, wherein the second device isolation layer comprises a first depth in the semiconductor substrate that is shallower than a second depth of the first device isolation layer in the semiconductor substrate, and wherein, the photoelectric conversion layer extends to a third depth that is deeper than the first depth of the second device isolation layer and shallower than the second depth of the first device isolation layer.