Patent ID: 6359323
Filing Date: 2002-03-19
Classification: H01L

Abstract:
A color image sensor for scanning and converting an optical image into electrical signals, comprising:a red photodiode including a P-type semiconductor layer and a first N-type diffusion region located beneath the surface of the P-type semiconductor layer to thereby form a first depletion region positioned beneath the surface of the P-type semiconductor layer; a green photodiode including the P-type semiconductor layer and a second N-type diffusion region located beneath the surface of the P-type semiconductor layer to thereby form a second depletion region positioned beneath the surface of the P-type semiconductor layer, wherein the second depletion region is more adjacent to the surface of the P-type semiconductor layer than the first depletion region; and a blue photodiode including the P-type semiconductor layer and a third N-type diffusion region located beneath the surface of the P-type semiconductor layer to thereby form a third depletion region positioned beneath the surface of the P-type semiconductor layer, wherein the third depletion region is more adjacent to the surface of the P-type semiconductor layer than the second depletion region.