Biosensor, biosensor chip and biosensor device
First Claim
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1. A biosensor, comprising:
- an electrode set disposed on a proximal end of the biosensor, the electrode set consisting of a working electrode and at least one counter electrode;
a working electrode terminal disposed on a distal end of the biosensor;
a counter electrode terminal disposed on the distal end of the biosensor;
a first reference terminal disposed on the distal end of the biosensor;
a second reference terminal disposed on the distal end of the biosensor;
a first conductive line connecting the working electrode to the working electrode terminal;
a second conductive line connecting the working electrode to the first reference terminal;
a third conductive line connecting the at least one counter electrode to the counter electrode terminal; and
a fourth conductive line connecting the at least one counter electrode to the second reference terminal.
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Accused Products
Abstract
A biosensor includes a working electrode 101, a counter electrode 102 opposing the working electrode 101, a working electrode terminal 103 and a working electrode reference terminal 10 connected to the working electrode 101 by wires, and a counter electrode terminal 104 connected to the counter electrode 102 by a wire. By employing a structure with at least three electrodes, it is possible to assay a target substance without being influenced by the line resistance on the working electrode side.
66 Citations
8 Claims
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1. A biosensor, comprising:
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an electrode set disposed on a proximal end of the biosensor, the electrode set consisting of a working electrode and at least one counter electrode; a working electrode terminal disposed on a distal end of the biosensor; a counter electrode terminal disposed on the distal end of the biosensor; a first reference terminal disposed on the distal end of the biosensor; a second reference terminal disposed on the distal end of the biosensor; a first conductive line connecting the working electrode to the working electrode terminal; a second conductive line connecting the working electrode to the first reference terminal; a third conductive line connecting the at least one counter electrode to the counter electrode terminal; and a fourth conductive line connecting the at least one counter electrode to the second reference terminal. - View Dependent Claims (2, 3)
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4. A biosensor device, comprising:
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a biosensor, comprising; an electrode set disposed on a proximal end of the biosensor, the electrode set consisting of a working electrode and at least one counter electrode; a working electrode terminal disposed on a distal end of the biosensor; a counter electrode terminal disposed on the distal end of the biosensor; a first reference terminal disposed on the distal end of the biosensor; a second reference terminal disposed on the distal end of the biosensor; a first conductive line connecting the working electrode to the working electrode terminal; a second conductive line connecting the working electrode to the first reference terminal; a third conductive line connecting the at least one counter electrode to the counter electrode terminal; a fourth conductive line connecting the at least one counter electrode to the second reference terminal; and a measurement circuit connected to the biosensor for performing an assay on an assayed fluid based on a current flowing through the first conductive line or the third conductive line;
wherein substantially no current flows through the second conductive line and through the fourth conductive line during the assay.
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5. A method for assaying a concentration of a substance in an assayed fluid based on a current flowing through an electrode set disposed on a proximal end of a biosensor that is configured to be connected to a measurement circuit, the electrode set consisting of a working electrode and at least one counter electrode;
- the biosensor having first and second conductive lines connected to the working electrode and extending to a distal end of the biosensor, third and fourth conductive lines connected to the at least one counter electrode and extending to the distal end of the biosensor;
the method comprising the steps of;connecting the biosensor to the measurement circuit; applying a voltage to the biosensor to control a voltage between the working electrode and the at least one counter electrode using voltages detected by the second conductive line and the fourth conductive line; and detecting a current between the working electrode and the at least one counter electrode using the first conductive line or the third conductive line. - View Dependent Claims (6, 7, 8)
- the biosensor having first and second conductive lines connected to the working electrode and extending to a distal end of the biosensor, third and fourth conductive lines connected to the at least one counter electrode and extending to the distal end of the biosensor;
Specification