Patent ID: 7695992
Filing Date: 2010-04-13
Classification: H01L

Abstract:
1. A method for manufacturing an image sensor comprising: forming an inter-metal dielectric layer having a plurality of metal lines over a semiconductor substrate having a plurality of photodiodes; forming a passivation oxide layer over the inter-metal dielectric layer; forming a first photoresist pattern over a portion of the passivation oxide layer corresponding to the plurality of metal lines; forming an inclined portion of the passivation oxide layer by a wet etching process using the first photoresist pattern; forming a dark shield layer over a portion of the passivation oxide layer corresponding to the portion of the inter-metal dielectric layer having the plurality of metal lines and using the inclined portion of the passivation oxide layer as an alignment key; and then forming a nitride layer over the semiconductor substrate including the dark shield layer.