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CMOS image sensors and related devices and fabrication methods

  • US 8,154,062 B2
  • Filed: 10/16/2009
  • Issued: 04/10/2012
  • Est. Priority Date: 12/17/2008
  • Status: Active Grant
First Claim
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1. An image sensor device, comprising:

  • a substrate including a light sensing region therein;

    a reflective structure on a first surface of the substrate over the light sensing region;

    an interconnection structure having a lower reflectivity than the reflective structure on the first surface of the substrate adjacent to the reflective structure; and

    a microlens and a color filter on a second surface of the substrate opposite the first surface,wherein the reflective structure is configured to reflect portions of the incident light that pass through the light sensing region back toward the light sensing region.

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