Patent ID: 9054004
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A backside illuminated image sensor including an array of pixels, comprising: a first pixel disposed in a front side of a substrate and configured to generate charged carriers in response to light incident upon a backside of the substrate; a second pixel disposed in the front side of the substrate and configured to generate charged carriers in response to light incident upon the backside of the substrate; and an anti-reflective layer on the backside of the substrate; and a first isolation structure disposed to separate the second pixel from the first pixel, the first isolation structure extending from the backside of the substrate toward the front side of the substrate, wherein the first isolation structure includes a first sidewall substantially vertically to the front side of the substrate, wherein the first isolation structure separates a region of the anti-reflective layer corresponding to the first pixel and another region of the anti-reflective layer corresponding to the second pixel.