Analyte test sensor and method of manufacturing the same
First Claim
1. A method of making a plurality of calibration-adjusted sensors, the method comprising:
- applying a known voltage to an electrode pair of a first sensor to produce a working current through the electrode pair of the first sensor;
measuring the working current of the first sensor in the presence of a control sample;
assigning a calibration code to the measured working current of the first sensor; and
modifying the resistance of an electrode pair of a second sensor;
measuring a working current of the second sensor in the presence of a control sample to confirm that when the known voltage is applied to the electrode pair of the second sensor, the second sensor will have a working current that is the same as the working current of the first sensor.
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Accused Products
Abstract
An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample includes a non-conductive substrate, a reference electrode deposited on the substrate, a working electrode deposited on the substrate and a compensation electrode deposited on the substrate. The compensation electrode is provided with a resistive ladder and is designed to correct for test result inaccuracies which are the result of variances in the manufacturing of the test sensor. Specifically, in one embodiment, the compensation electrode corrects for test result inaccuracies in an analog manner by shunting a portion of the working current away from working electrode. In another embodiment, the compensation electrode corrects for test result inaccuracies in a digital manner by providing a calibration code which is proportional its resistance value. A batch of analyte test sensors are preferably manufactured in the following manner. An initial batch of the test sensors is constructed. Then, a limited sampling of the sensors is tested for accuracy using a control sample. Based on the test results, the resistance value of the compensation electrode for each remaining sensor in the batch is adjusted accordingly.
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Citations
18 Claims
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1. A method of making a plurality of calibration-adjusted sensors, the method comprising:
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applying a known voltage to an electrode pair of a first sensor to produce a working current through the electrode pair of the first sensor; measuring the working current of the first sensor in the presence of a control sample; assigning a calibration code to the measured working current of the first sensor; and modifying the resistance of an electrode pair of a second sensor; measuring a working current of the second sensor in the presence of a control sample to confirm that when the known voltage is applied to the electrode pair of the second sensor, the second sensor will have a working current that is the same as the working current of the first sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making a plurality of calibration-adjusted sensors, the method comprising:
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determining a target calibration parameter value for a first sensor; applying a known voltage to an electrode pair of the first sensor from a first batch of sensors to produce a working current through the electrode pair of the first sensor; measuring the working current of the first sensor in the presence of a control sample; modifying the resistance of an electrode pair of a second sensor from the first batch of sensors; measuring a working current of the second sensor in the presence of a control sample to confirm that when the known voltage is applied to the electrode pair of the second sensor, the second sensor will have a working current that corresponds to the target calibration parameter value. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification