Electrochemical test device
First Claim
1. An electrochemical test device for determining the presence or concentration of an analyte in an aqueous fluid sample, said electrochemical test device comprising:
- (a) a single substrate, the single substrate comprising a non-conductive coating affixed to one side of a flexible material;
(b) a working electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said working electrode having a first electrode area, a first lead and a first contact pad;
(c) a counter electrode comprising an amorphous semiconductor material affixed to the non-conductive-coating, said counter electrode having a second electrode are, a second lead and a second contact pad; and
(d) a reagent capable of reacting with the analyte to produce a measurable change in potential which can be correlated to the presence or concentration of the analyte in the fluid sample, said reagent overlaying at least a portion of the first electrode area of the working electrode.
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Accused Products
Abstract
An electrochemical test device is provided for determining the presence or concentration of an analyte in an aqueous fluid sample. The electrochemical test device includes a working electrode and a counter electrode made of an amorphous semiconductor material. The working electrode is overlaid with a reagent capable of reacting with an analyte to produce a measurable change in potential which can be correlated to the concentration of the analyte in the fluid sample. The test device optionally contains a reference electrode made of an amorphous semiconductor material having a reference material on the reference electrode. The test device electrodes can be constructed on a flexible film substrate, such as a polymeric film or a metal foil coated with a non-conductive coating.
236 Citations
46 Claims
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1. An electrochemical test device for determining the presence or concentration of an analyte in an aqueous fluid sample, said electrochemical test device comprising:
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(a) a single substrate, the single substrate comprising a non-conductive coating affixed to one side of a flexible material;
(b) a working electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said working electrode having a first electrode area, a first lead and a first contact pad;
(c) a counter electrode comprising an amorphous semiconductor material affixed to the non-conductive-coating, said counter electrode having a second electrode are, a second lead and a second contact pad; and
(d) a reagent capable of reacting with the analyte to produce a measurable change in potential which can be correlated to the presence or concentration of the analyte in the fluid sample, said reagent overlaying at least a portion of the first electrode area of the working electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A device comprising:
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a single substrate, the single substrate being of sufficient flexibility to undergo roll-type processing, the single substrate comprising a flexible metallic material;
a non-conductive, surface morphology-improving coating affixed to a surface of the single substrate, said coating comprising an epoxy coating; and
an amorphous semiconductor material layer affixed to the non-conductive coating. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A device comprising:
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a single substrate, the single substrate being of sufficient flexibility to undergo roll-type processing, the single substrate comprising an annealed, preshrunk polymeric material;
a surface morphology-improving coating affixed to a surface of the single substrate, wherein the coating is a non-conductive coating, and an amorphous semiconductor material affixed to the coating. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. An electrochemical test device for determining the presence or concentration of an analyte in an aqueous fluid sample, said electrochemical test device comprising:
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a substrate, the substrate consisting of a single layer of flexible material, the flexible material having sufficient flexibility to undergo roll-type processing;
a non-conductive coating affixed to one side of the substrate;
a working electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said working electrode having a first electrode area, a first lead and a first contact pad;
a counter electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said counter electrode having a second electrode area, a second lead and a second contact pad; and
a reagent capable of reacting with the analytic to produce a measurable change in potential which can be correlated to the presence or concentration of the analyte in the fluid sample, said reagent overlaying at least a portion of the first electrode area of the working electrode. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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40. An electrochemical test device for determining the presence or concentration of an analyte in an aqueous fluid sample, said electrochemical test device comprising:
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a single substrate, the single substrate comprising a layer of flexible material, the flexible material having sufficient flexibility to undergo roll-type processing;
a non-conductive coating affixed to a side of the single substrate, the non-conductive coating having sufficient thickness to fill surface valleys of the single substrate thereby providing improved surface flatness relative to the substrate;
a working electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said working electrode having a first electrode area, a first lead and a first contact pad;
a counter electrode comprising an amorphous semiconductor material affixed to the non-conductive coating, said counter electrode having a second electrode area, a second lead and a second contact pad; and
a reagent capable of reacting with the analyte to produce a measurable change in potential which can be correlated to the presence or concentration of the analyte in the fluid sample, said reagent overlaying at least a portion of the first electrode area of the working electrode. - View Dependent Claims (41, 42, 43, 44, 45, 46)
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Specification