Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-05-05
2010-12-28
Ko, Tony (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C257S440000, C359S486010
Reexamination Certificate
active
07858921
ABSTRACT:
Imager pixel arrays and methods for forming imager pixel arrays. An image sensor pixel includes a photosensor and a waveguide grating resonance filter formed over the photosensor. The waveguide grating resonance filter is configured to pass light to the photosensor in a wavelength band and to block light outside of the wavelength band. The waveguide grating resonance filter includes a grating material having a first refractive index and arranged in a grating pattern with a grating pitch, and has an effective refractive index that is a function of the first refractive index. A combination of the grating pitch and the effective refractive index is selected to correspond to the wavelength band.
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Shi Zhong
Stanton William A.
Wang Fei
Aptina Imaging Corporation
Ko Tony
RatnerPrestia
LandOfFree
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