Patent ID: 7635625
Filing Date: 2009-12-22
Classification: H01L

Abstract:
1. A method for manufacturing an image sensor, comprising: forming a polysilicon layer on a semiconductor substrate having an active region; forming a sacrificial layer on the polysilicon layer; forming a photoresist pattern on the sacrificial layer exposing a portion of the sacrificial layer on the active region; implanting conductive impurities into the polysilicon layer using the photoresist pattern as an ion implantation mask; removing the photoresist pattern; and removing the sacrificial layer from the polysilicon layer, thereby removing photoresist residues remaining on the sacrificial layer, wherein removing the photoresist pattern comprises using a Sulfuric-Peroxide-Mixture (SPM) solution, which is a mixed solution of sulfuric acid and oxygenated water, or using a mixed solution of a Standard Clean 1 (SCI) solution and hydrogen fluoride diluted by a mixed solution of sulfuric acid and water.