Patent ID: 8872298

Claim:
A unit pixel array of an image sensor, comprising: a semiconductor substrate having a plurality of photodiodes; an interlayer insulation layer on a front-side of the semiconductor substrate; a plurality of micro lenses on a back-side of the semiconductor substrate; a plurality of wavelength adjustment film portions between respective ones of the micro lenses and the back-side of the semiconductor substrate; and a plurality of color filters including a first color filter to output light to a first wavelength adjustment film portion and a second color filter to output light to a second wavelength adjustment film portion, wherein: a first wavelength adjustment film portion changes a wavelength of light from the first color filter such that a majority of light from the first color filter is absorbed by a predetermined amount at a first depth of the semiconductor substrate, and a second wavelength adjustment film portion changes a wavelength of light from the second color filter such that a majority of light from the second color filter is absorbed by the predetermined amount at the first depth of the substrate, wherein the first and second color filters filter light of different colors.