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Method and apparatus for using flex circuit technology to create a reference electrode channel

  • US 7,586,173 B2
  • Filed: 02/22/2007
  • Issued: 09/08/2009
  • Est. Priority Date: 02/27/2006
  • Status: Active Grant
First Claim
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1. A sensor, comprising:

  • a substrate;

    a reference electrode formed on a first portion of the substrate, the reference electrode being made of a first conductive material;

    a first mask located over the substrate, the first mask having an opening that exposes the reference electrode and a second portion of the substrate;

    a second conductive material located in the opening in the first mask, the second conductive material being in direct contact with the reference electrode; and

    a second mask located over the second conductive material, the second mask having an opening over the second portion of the substrate, the opening exposing a portion of the second conductive material, which forms a working surface to receive a fluid of interest.

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