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Pixel isolation elements, devices and associated methods

DC
  • US 9,905,599 B2
  • Filed: 06/23/2015
  • Issued: 02/27/2018
  • Est. Priority Date: 03/22/2012
  • Status: Active Grant
First Claim
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1. A light trapping device, comprising:

  • at least one light sensitive pixel having a light incident surface, a backside surface opposite the light incident surface, and a peripheral sidewall extending at least partially around the pixel periphery;

    a backside light trapping material at least partially covering the backside surface;

    a peripheral light trapping material substantially covering the peripheral sidewall, wherein said peripheral light trapping material is doped with a dopant to create a surface field; and

    a reflective layer coupled to the light incident side and having an aperture to allow entry of light into the pixel;

    wherein the reflective layer is operable to reflect at least a portion of light impinging thereupon from inside the pixel back into the pixel back into the pixel.

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