Biosensor, biosensor chip and biosensor device
First Claim
1. A method for assaying a concentration of a substance in an assayed fluid based on a current flowing between a working electrode and a counter electrode that are disposed on a proximal end of a biosensor that is configured to be connected to a measurement circuit, the biosensor having first and second conductive lines connected to the working electrode and extending to a distal end of the biosensor and third and fourth conductive lines connected to the 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 counter electrode using voltages detected by the second conductive line and the fourth conductive line, at least a portion of the second conductive line being disposed outside at least a portion of the first conductive line relative to a centerline that extends between the proximal end and the distal end of the biosensor and at least a portion of the fourth conductive line being disposed outside at least a portion of the third conductive line relative to the centerline; and
detecting a current between the working electrode and the counter electrode using the first conductive line or the third conductive line.
1 Assignment
0 Petitions
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
25 Claims
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1. A method for assaying a concentration of a substance in an assayed fluid based on a current flowing between a working electrode and a counter electrode that are disposed on a proximal end of a biosensor that is configured to be connected to a measurement circuit, the biosensor having first and second conductive lines connected to the working electrode and extending to a distal end of the biosensor and third and fourth conductive lines connected to the 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 counter electrode using voltages detected by the second conductive line and the fourth conductive line, at least a portion of the second conductive line being disposed outside at least a portion of the first conductive line relative to a centerline that extends between the proximal end and the distal end of the biosensor and at least a portion of the fourth conductive line being disposed outside at least a portion of the third conductive line relative to the centerline; and detecting a current between the working electrode and the counter electrode using the first conductive line or the third conductive line. - View Dependent Claims (2, 3, 4, 5, 6)
- the method comprising the steps of;
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7. A device configured to be connected to a biosensor that has a working electrode and a counter electrode that are disposed on a proximal end, first and second conductive lines connected to the working electrode and extending to a distal end of the biosensor and third and fourth conductive lines connected to the counter electrode and extending to the distal end of the biosensor;
- the device comprising;
a measurement circuit for controlling a voltage between the working electrode and the counter electrode using voltages detected by the second conductive line and the fourth conductive line, at least a portion of the second conductive line being disposed outside at least a portion of the first conductive line relative to a centerline that extends between the proximal end and the distal end of the biosensor and at least a portion of the fourth conductive line being disposed outside at least a portion of the third conductive line relative to the centerline. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
- the device comprising;
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17. A device configured to be connected to a biosensor that has a working electrode and a counter electrode that are disposed on a proximal end and four terminals that are disposed on a distal end, wherein two of the four terminals are connected to the working electrode and two of the four terminals are connected to the counter electrode, the device comprising:
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a first terminal, a second terminal, a third terminal, and a fourth terminal that are configured to be respectively connected to the four terminals of the biosensor; and a measurement circuit for controlling a voltage between the working electrode and the counter electrode using voltages detected by the second terminal and the fourth terminal and detecting a current between the working electrode and the counter electrode based on a current flowing through the first terminal or the third terminal, wherein the second terminal and the fourth terminal are each disposed near an outside edge of the biosensor relative to a centerline extending between the proximal end and the distal end of the biosensor when the biosensor is connected. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification