Patent ID: 7413944
Filing Date: 2008-08-19
Classification: H01L

Abstract:
1. A method of manufacturing a CMOS image sensor, comprising steps of: forming an element isolation in a field region of a semiconductor substrate where a photodiode region, first and second conductivity type transistor regions, the field region, and a dummy moat region are defined; forming a photodiode in the photodiode region of the semiconductor substrate; forming a first conductivity type well region and a second conductivity type well region by implanting first and second conductivity type impurity ions in the first and second conductivity type transistor regions of the semiconductor substrate, respectively; forming a first gate electrode on the first conductivity type well region with a first gate insulating film interposed and a second gate electrode on the second conductivity type well region with a second gate insulating film interposed; forming a lightly doped first conductivity type impurity region in the second conductivity type well region at both sides of the first gate electrode and a lightly doped second conductivity type impurity region in the first conductivity type well region at both sides of the second gate electrode; forming a heavily doped second conductivity type first impurity region in the first conductivity type well region at both sides of the second gate electrode; and forming a heavily doped first conductivity type second impurity region in the second conductivity type well region at both sides of the first gate electrode and a heavily doped first conductivity type third impurity region in the dummy moat region simultaneously.