Biosensors comprising heat sealable spacer materials
First Claim
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1. A biosensor for measuring analyte in a fluid, said biosensor comprising:
- a substrate layer, said substrate layer comprising;
at least one electrode;
at least one cathode;
at least one anode;
at least one spacer material, wherein said spacer material comprises a heat sealable organic layer that covers at least a portion of the anode and defines at least one edge of said anode, wherein said spacer material has at least one hole punched through it, said hole defining at least one sample cavity or well;
a reaction reagent system located in said at least cavity or well, said reaction reagent system comprising an electron mediator and an oxidation-reduction enzyme specific for said analyte; and
a cover disposed over the sample cavity or well to form at least one capillary gap into which blood could be drawn.
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Abstract
Disclosed herein is a biosensor for measuring analyte in a fluid that comprises a substrate layer having disposed thereon at least one each of an electrode, cathode, anode, and a novel spacer material. The spacer material according to the present disclosure comprises a heat sealable organic layer that covers at least a portion of the anode and defines at least one edge of the anode, wherein the spacer material has at least one hole punched through it and defines a cavity or well for accepting chemistry. Also disclosed is a method of making such biosensors.
118 Citations
46 Claims
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1. A biosensor for measuring analyte in a fluid, said biosensor comprising:
- a substrate layer, said substrate layer comprising;
at least one electrode;
at least one cathode;
at least one anode;
at least one spacer material, wherein said spacer material comprises a heat sealable organic layer that covers at least a portion of the anode and defines at least one edge of said anode, wherein said spacer material has at least one hole punched through it, said hole defining at least one sample cavity or well;
a reaction reagent system located in said at least cavity or well, said reaction reagent system comprising an electron mediator and an oxidation-reduction enzyme specific for said analyte; and
a cover disposed over the sample cavity or well to form at least one capillary gap into which blood could be drawn. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- a substrate layer, said substrate layer comprising;
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26. A method of making a biosensor for measuring an analyte, said method comprising:
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applying an electroactive material onto a substrate to form a coated substrate;
forming patterns into said coated substrate layer by ablating the electroactive material with a laser, wherein said patterns form an electrode array comprising at least one electrode, cathode, and anode;
applying an organic film on said substrate such that it covers at least a portion of said patterns, wherein at least one hole has been punched into said organic film prior to depositing it onto said substrate, said hole forming at least one well when deposited onto said substrate, wherein said organic film comprises a heat sealable layer that covers at least a portion of the anode and defines at least one edge of said anode;
laminating said organic film onto said substrate by applying heat and pressure to said organic film; and
depositing within said at least one well a reaction reagent system comprising an electron mediator and an oxidation-reduction enzyme specific for said analyte; and
optionally applying a cover to form a capillary for sample application. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A biosensor for measuring glucose levels in blood, said biosensor comprising:
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a substrate layer, said substrate layer comprising;
at least one electrode;
at least one cathode;
at least one anode;
at least one spacer material that comprises a polyethylene terephthalate (PET) with a polyolefin layer disposed thereon, wherein said spacer material activates at or above 85°
C., and defines two of four edges of said anode, the two remaining edges of the anode being defined by lines ablated into said substrate layer by a laser,wherein said spacer material has at least one hole punched through it, said hole defining a sample cavity or well;
a reaction reagent system located in said cavity or well, said reaction reagent system comprising an electron mediator chosen from a ferricyamide material, ferrocene carboxylic acid or a ruthenium containing material, and an oxidation-reduction enzyme chosen from glucose oxidase, PQQ-dependent glucose dehydrogenase and NAD-dependent glucose dehydrogenase; and
a cover disposed over the sample cavity or well to form at least one capillary gap into which blood could be drawn. - View Dependent Claims (45, 46)
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Specification