Patent ID: 9627434
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A color imaging device comprising: an optical sensor having a plurality of pixels, each pixel of the plurality of pixels comprising a plurality of sub-pixels, wherein each sub-pixel of the plurality of sub-pixels are adapted to sense light; and a metal film on the optical sensor, the metal film having a group of nano-holes arranged over at least one sub-pixel according to a first periodic lattice formation configured to pass light having a preselected first range of wavelengths, the first periodic lattice configuration having the nano-holes spaced at a first period, each nano-hole of the group of nano-holes having a first diameter, wherein another group of nano-holes arranged over an adjoining sub-pixel according to a second periodic lattice formation configured to pass light having a second range of wavelengths different from the first range of wavelengths, the second periodic lattice configuration having the another group of nano-holes spaced at a second period, each nano-hole of the another group of nano-holes having a second diameter.