METHOD AND SYSTEM FOR ASSEMBLING A MICROFLUIDIC SENSOR
First Claim
Patent Images
1. A microfluidic sensor, comprising:
- a cover layer;
an electrode layer comprising a substrate and at least one electrode deposited on the substrate and having a thickness less than 10 micrometers (μ
m); and
a spacer layer between the cover layer and electrode layer, having at least one channel formed therein and configured to receive a fluid.
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Abstract
A microfluidic sensor (10), such as an electrochemical blood test strip, with more accurate measurement comprises a plurality of channels (24) through which a fluid to be tested flows via a capillary action. One or more electrodes (30) are located under the channels (24). As the fluid flows over the electrodes (30) in the channels (24), the impedance between the electrodes (30) may be measured to determine fluid properties. In order to increase the accuracy of the measurements, the electrode deposition may be configured to be less than 10 μm in thickness via a printing process with high process consistency, thereby reducing the disruption of the electrode deposition on the fluid flow.
11 Citations
20 Claims
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1. A microfluidic sensor, comprising:
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a cover layer; an electrode layer comprising a substrate and at least one electrode deposited on the substrate and having a thickness less than 10 micrometers (μ
m); anda spacer layer between the cover layer and electrode layer, having at least one channel formed therein and configured to receive a fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for assembling and using a microfluidic sensor, comprising:
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depositing a conductive material on a substrate to form at least one electrode having a thickness less than 10 micrometers (μ
m);attaching a first surface of a spacer layer having at least one channel defined therein to the substrate having the at least one electrode with the at least one channel in the spacer layer passing over the at least one electrode on the substrate layer; and attaching a cover layer to a second surface of the spacer layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification