Electrochemical sensor
First Claim
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1. An electrochemical sensor device comprising:
- a sensor chip having an integrated electrochemical sensor element; and
a substrate having a first surface on which the sensor chip is mounted and a second surface;
a reference electrode structure including a reference electrode and a gel-based electrolyte adjacent thereto, the reference electrode structure configured and arranged with the integrated electrochemical sensor element for sensing pH, the reference electrode structure connected to the sensor chip via an electrical connection on the first surface of the substrate;
a liquid access opening through the substrate from the first surface of the substrate to the second surface of the substrate and configured and arranged to expose the integrated electrochemical sensor element; and
a diffusion barrier layer covering the gel-based electrolyte and configured and arranged to mitigate out-diffusion of electrolytes from the gel-based electrolyte.
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Abstract
An electrochemical sensor device including a sensor chip having an integrated electrochemical sensor element; and a substrate having a first surface on which the sensor chip is mounted, the substrate comprising a reference electrode structure for the integrated electrochemical sensor element, the reference electrode structure connected to the sensor chip via an electrical connection on the first surface of the substrate.
18 Citations
15 Claims
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1. An electrochemical sensor device comprising:
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a sensor chip having an integrated electrochemical sensor element; and a substrate having a first surface on which the sensor chip is mounted and a second surface; a reference electrode structure including a reference electrode and a gel-based electrolyte adjacent thereto, the reference electrode structure configured and arranged with the integrated electrochemical sensor element for sensing pH, the reference electrode structure connected to the sensor chip via an electrical connection on the first surface of the substrate; a liquid access opening through the substrate from the first surface of the substrate to the second surface of the substrate and configured and arranged to expose the integrated electrochemical sensor element; and a diffusion barrier layer covering the gel-based electrolyte and configured and arranged to mitigate out-diffusion of electrolytes from the gel-based electrolyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of manufacturing an electrochemical sensor device, the method comprising:
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providing a substrate having a first surface and a second opposing surface; applying electrical connections to the first surface of the substrate; forming a reference electrode structure in the substrate; connecting a sensor chip having an integrated electrochemical sensor element to the first surface, electrically connecting the sensor element to the reference electrode structure via the electrical connection; providing a liquid access opening through the substrate and from the first surface of the substrate to the second surface of the substrate and configured and arranged to expose the integrated electrochemical sensor element; applying a reference electrode layer over the electrical connection; applying a gel-based electrolyte layer over the reference electrode layer; and covering the gel-based electrolyte layer with a diffusion barrier layer. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification