Patent ID: 9305947
Filing Date: 2016-04-05
CPC Classification: H01L

Claim Text:
1. An image sensor comprising: a substrate defining a plurality of pixel regions, the substrate having a first surface and a second surface opposite the first surface, wherein the second surface of the substrate is configured to receive light incident thereon and wherein the substrate defines a deep trench extending from the second surface of the substrate toward the first surface of the substrate and separating the plurality of pixel regions from each other; in each of the plurality of pixel regions of the substrate, a photoelectric conversion region; a gate electrode on the photoelectric conversion region; a negative fixed charge layer covering the second surface of the substrate and at least a portion of a sidewall of the deep trench; and a shallow device isolation layer on the first surface of the substrate, wherein the shallow device isolation layer defines an active region in each of the pixel regions and wherein the negative fixed charge layer contacts the shallow device isolation layer.