Patent ID: 7675100

Claim:
A CMOS image sensor comprising: a second conductive type semiconductor substrate having an active region and a device isolation region defined therein, wherein the active region has a photodiode region and a transistor region defined therein; a device isolating film in the semiconductor substrate of the device isolation region; a lightly doped first conductive type impurity region in the semiconductor substrate of the photodiode region, the lightly doped first conductive type impurity region being spaced a distance from the device isolation film; a medium concentration second conductive type impurity region at a surface of the lightly doped first conductive type impurity region; and a heavily doped second conductive type impurity region adjacent to the device isolation film in the photodiode region of the substrate, the heavily doped second conductive type impurity region having a width the same as a depth of the medium concentration second conductive type impurity region.