Patent ID: 7645629
Filing Date: 2010-01-12
Classification: H01L

Abstract:
1. A method comprising: preparing a semiconductor substrate in which a device isolation region and a pixel region are defined and over which a polyline is formed; forming a first type photodiode; forming a second type photodiode at an upper portion of the first type photodiode; depositing a nitride layer over the semiconductor substrate; patterning the nitride layer to form a first nitride layer over a sidewall of the polyline and a second nitride layer overlapping the pixel region and the device isolation region by a predetermined length from a boundary between the pixel region and the device isolation region; depositing a silicide barrier layer over the semiconductor substrate; patterning the deposited silicide barrier layer to form silicide barrier layer patterns in the pixel region; performing a silicide process on the semiconductor substrate; and removing the silicide barrier layer patterns from a periphery region and the device isolation region.