Patent ID: 7462520
Filing Date: 2008-12-09
Classification: H01L

Abstract:
1. A method of fabricating an image sensor, the method comprising: forming a first gate insulation layer in a first region of a semiconductor substrate and a first gate electrode layer, to cover the first gate insulation layer, the first region comprising a pixel region and a high voltage region; forming a second gate insulation layer within a nitrogen enhanced atmosphere and a second gate electrode layer in a second region of the semiconductor substrate; patterning the first gate electrode layer and the first gate insulation layer of the first region to form a first gate pattern that comprises a pixel region gate pattern in the pixel region and a high voltage region gate pattern in the high voltage region; patterning the second gate electrode layer and the second gate insulation layer of the second region to form a second gate pattern; and forming a photoelectric converting region in the pixel region at a first side of the pixel region gate pattern, wherein forming the second gate insulation layer comprises exposing a low voltage region that corresponds to the second region to the nitrogen enhanced atmosphere without exposing the first gate insulation layer in the high voltage region and the pixel region that correspond to the first region to the nitrogen enhanced atmosphere.