Patent ID: 7442994

Claim:
A method for manufacturing a CMOS image sensor comprising: preparing a transparent substrate including an active area, having a photodiode region and a transistor region, and a field area for isolation of the active area; forming a black matrix layer on the transparent substrate excluding the photodiode region; forming a color filter layer on the transparent substrate corresponding to the photodiode region; forming an insulating layer on the transparent substrate including the black matrix layer and the color filter layer; forming a p-type semiconductor layer on the transparent substrate of the active area including the color filter layer and the black matrix layer; forming a gate insulating layer and a plurality of gate electrodes on the p-type semiconductor layer of the transistor region; forming a photodiode including a n-type impurity region and a p-type impurity region in the p-type semiconductor layer of the photodiode region; and forming a source region and a drain region by implanting n-type impurity ions into the p-type semiconductor layer between each of the plurality of gate electrodes, wherein forming the p-type semiconductor layer includes: depositing a polysilicon layer doped with p-type impurity ions or an amorphous silicon layer doped with p-type impurity ions on the surface of the transparent substrate including the black matrix layer and the color filter layer; and selectively removing the polysilicon layer doped with p-type impurity ions or the amorphous silicon layer doped with p-type impurity ions from the field area.