Patent ID: 6057586
Filing Date: 2000-05-02
Classification: H01L

Abstract:
An apparatus comprising:a) a substrate having a plurality of photodiodes, each of the plurality of photodiodes having a light receiving area formed in the substrate;b) a first color filter array, CFA, material sensitive to light having a wavelength of a first color disposed above the light receiving area of a first photodiode, the first photodiode and the first CFA material collectively having a first responsivity, and a second CFA material sensitive to light having a wavelength of a second color disposed above the light receiving area of a second photodiode, the second photodiode and the second CFA material having a second responsivity greater than the first responsivity; andc) a light shield disposed above the substrate, the light shield forming an aperture over the light receiving area of the second photodiode, the aperture having an area substantially equal to the light receiving area adjusted by a reduction factor, said reduction factor being a result of an arithmetic operation between the first responsivity and the second responsivity such that, for a given size of light receiving area, the light receiving area of the first photodiode may be exposed to a greater amount of incident illumination than the light receiving area of the second photodiode.