CPC H01L 27/1463 (2013.01) [H01L 27/1462 (2013.01); H01L 27/14607 (2013.01); H01L 27/14625 (2013.01); H01L 27/14627 (2013.01); H01L 27/14629 (2013.01); H01L 27/14645 (2013.01); H01L 27/14685 (2013.01); H01L 27/14689 (2013.01)] | 18 Claims |
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 disposed into at least a portion of the pixel and extending at least substantially around the pixel periphery;
a backside light trapping material at least partially covering the backside surface; and
a peripheral light trapping material substantially covering the peripheral sidewall;
wherein light contacting the backside light trapping material or the peripheral light trapping material is reflected back toward the pixel;
wherein at least one of the backside light trapping material or the peripheral light trapping material includes a high refractive index material sandwiched between two low refractive index materials.
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