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Disposable sub-microliter volume sensor and method of making

  • US 6,258,229 B1
  • Filed: 06/02/1999
  • Issued: 07/10/2001
  • Est. Priority Date: 06/02/1999
  • Status: Expired due to Term
First Claim
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1. A disposable electrode strip for testing a fluid sample comprising:

  • a laminated strip having a first strip end, a second strip end and a vent opening spaced from said first strip end, said laminated strip comprising a base layer having a conductive layer disposed thereon, said conductive layer having a scribe line delineated thereon and forming three electrode paths, a channel forming layer carried on said base layer, and a cover;

    an enclosed channel between said first strip end and said vent opening, said enclosed channel sized to hold a volume of said fluid sample less than one microliter;

    a reagent matrix containing at least an enzyme;

    a stabilizer, wherein said stabilizer is a polyalkylene glycol; and

    a redox mediator disposed on said base layer in said enclosed channel;

    conductive contacts at said second strip end and insulated from said enclosed channel.

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