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Photonic crystal-based filter for use in an image sensor

  • US 7,683,311 B2
  • Filed: 03/26/2007
  • Issued: 03/23/2010
  • Est. Priority Date: 06/01/2004
  • Status: Active Grant
First Claim
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1. An image sensor comprising:

  • an array of pixel cells, each pixel cell comprising;

    a photo-conversion device;

    a micro-lens; and

    a substantially flat color filter comprising;

    a photonic crystal structure, formed of spaced structures of a first material having a first refractive index, and a second material between the spaced structures having a second refractive index, over the photo-conversion device and beneath the micro-lens, the photonic crystal structure being configured to permit light of predetermined wavelengths to reach the photo-conversion device.

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