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Electrochemical sensor

  • US 5,900,128 A
  • Filed: 05/30/1997
  • Issued: 05/04/1999
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Term
First Claim
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1. An electrochemical sensor comprising:

  • at least one electrode fabricated from a precious metal disposed on top of a substrate,an electrolyte layer being disposed on top of at least a portion of the electrode, the electrolyte layer being surrounded by a first polymer structure,the first polymer structure further surrounding an electrochemically sensitive region of the substrate,a hydrophobic layer being disposed on top of the electrolyte layer and the first polymer structure and extending laterally beyond the first polymer structure and the electrolyte layer, the hydrophobic layer being surrounded by a second polymer structure and engaged by the second polymer structure at an outer periphery of the hydrophobic layer,a further portion of the electrode extending laterally beyond the electrolyte layer and the first polymer structure and between the substrate and the hydrophobic layer and further between the second polymer structure and the substrate,a protective layer being disposed between the further portion of the electrode and the hydrophobic layer, between the further portion of the electrode and the second polymer structure, and between the further portion of the electrode and the periphery of the hydrophobic layer where the second polymer structure engages the hydrophobic layer.

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