Patent ID: 9190441
Filing Date: 2015-11-17
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor image sensor device, comprising: forming a first opening and a second opening in a semiconductor substrate; forming a first doped region and a second doped region in the substrate using one of: a solid phase doping process and a gas phase doping process, wherein the first doped region is formed to surround the first opening in a conformal manner and wherein the second doped region is formed to surround the second opening in a conformal manner; filling the first opening with a dielectric material; and forming a first radiation-sensing region and a second radiation-sensing region in the substrate, wherein the first and second radiation-sensing regions are formed on opposite sides of either the first opening or the second opening, wherein the first radiation-sensing region includes a third doped region extending continuously within the semiconductor substrate from the first doped region to the second doped region, wherein the first doped region includes an edge that faces an edge of the third doped region in the semiconductor substrate, wherein a first portion of the edge of the first doped region physically contacts a first portion of the edge of the third doped region and wherein a second portion of the edge of the first doped region is separated from a second portion of the edge of the third doped region by a portion of the semiconductor substrate.