Patent ID: 7387926
Filing Date: 2008-06-17
Classification: H01L

Abstract:
1. A method for manufacturing a CMOS image sensor, comprising: preparing a semiconductor substrate having a photodiode region and a logic region; forming a first gate electrode on the photodiode region and a second gate electrode on the logic region, such that a gate oxide film is interposed between the semiconductor layer and the first and second gate electrodes; forming sidewall insulating films at both sides of the first and second gate electrodes; forming a salicide-preventing film over an overall surface of the semiconductor substrate including the first and second gate electrodes and the sidewall insulating films; removing a portion of the salicide-preventing film so as to cover the photodiode region and to expose the logic region and a portion of the sidewall insulating film of the first gate electrode; and removing a portion of the sidewall insulating films exposed by removing the salicide-preventing film, thereby exposing an upper side surface of the first and second gate electrodes.