Patent ID: 6323054
Filing Date: 2001-11-27
Classification: H01L

Abstract:
A method of forming a lateral photodiode element for an image sensor cell, in a semiconductor substrate, comprising the steps of:forming an insulator shape in a first region of said semiconductor substrate, with said insulator shape directly overlying a second region of said semiconductor substrate;forming a P well region, in a third region of said semiconductor substrate, with said third region of said semiconductor substrate a region not occupied with said insulator shape, and with said P well region butting said second region of said semiconductor substrate;forming a photoresist shape on a top surface of said semiconductor substrate with an opening in said photoresist shape exposing a portion of a top surface of said insulator shape; andperforming an ion implantation procedure through a portion of said insulator shape exposed in said opening in said photoresist shape, forming an N well region in a first portion of said second region of said semiconductor substrate, while second portions of said second region of said semiconductor substrate, directly underlying portions of said insulator shape not exposed in said opening in said photoresist shape, are protected from said ion implantation procedure, remain as intrinsic spaces resulting in said photodiode element.