Patent ID: 7063998
Filing Date: 2006-06-20
Classification: H01L

Abstract:
1. A method for manufacturing an image sensor having a photo diode, comprising: forming a transfer gate and a reset gate on predetermined portions of a semiconductor substrate with a specific distance therebetween; forming a photoresist pattern for exposing a region at one side of the transfer gate; forming a p-type photo diode region by implanting p-type impurities into the exposed semiconductor substrate with a first ion implantation energy; forming a first n-type photo diode region by implanting first n-type impurities into a portion below the p-type photo diode region, with a second ion implantation energy; forming a second n-type photo diode region by implanting second n-type impurities having greater projection distance and diffusivity than the first n-type impurities into a portion surrounding the first n-type photo diode region, with a third ion implantation energy; and removing the photoresist pattern.