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Metallic overcoating as a light attenuating layer for optical sensors

  • US 6,207,110 B1
  • Filed: 08/21/1998
  • Issued: 03/27/2001
  • Est. Priority Date: 08/21/1998
  • Status: Expired due to Term
First Claim
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1. A sensor comprising:

  • a substrate substantially transmissive to light having a first side and a second side;

    a sensing membrane layered onto the second side of said substrate; and

    a liquid permeable, substantially nontransmissive to light metallic coating comprising gold and palladium directly layered on said sensing membrane.

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