Sensors for measuring analyte concentrations and methods of making same

  • US 5,707,502 A
  • Filed: 07/12/1996
  • Issued: 01/13/1998
  • Est. Priority Date: 07/12/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A sensor for measuring a concentration of an analyte in a solution, comprising:

  • a substrate layer formed from an electrically insulating material;

    an electrode layer formed from an electrically conductive material, the electrode layer being supported by the substrate layer;

    an immobilized enzyme layer including an enzyme immobilized in a support material, the immobilized enzyme layer being supported by the electrode, the immobilized enzyme layer electrode layer having a hydrophobicity; and

    a hydrophobic layer supported by the immobilized enzyme layer and the substrate layer, the hydrophobic layer having a hydrophobicity greater than the hydrophobicity of the immobilized enzyme layer, the hydrophobic layer having a water droplet advancing angle of from about 60°

    to about 100°

    .

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