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US 2010/0140089 A1Published application
FLEXIBLE pH SENSORS AND pH SENSING SYSTEMS USING THE SAME
AssigneeChang Jung Christian University, a Taiwan Corporation
InventorsJung-Chuan Chou, Tai-Ping Sun, Shen-Kan Hsiung, Nien-Hsuan Chou, Sheng-Kai Li
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Abstract
This invention provides an extended gate ion-sensitive field effect transistor as a pH sensor for measuring the pH value of a solution under test. This invention also provides a pH sensing system comprising a separable and flexible pH sensor for measuring the pH value of a solution under test, wherein the transistor of the pH sensor can be prevented from direct contact with the solution.
Claims13
A flexible pH sensor, comprising:
- a flexible plastic substrate;
- an indium tin oxide (ITO) layer formed on the flexible plastic substrate;
- a sensing membrane formed on the ITO layer;
- and
- a sealant configured to encapsulate the flexible plastic substrate, the ITO layer and the sensing membrane, wherein a portion of an upper surface of the sensing membrane is exposed to form a sensing window.
2 more elements
A pH sensing system for measuring pH value of a liquid, comprising
- a flexible pH sensor, comprising:
- a flexible plastic substrate;
- an indium tin oxide (ITO) layer formed on the flexible plastic substrate;
- a sensing membrane formed on the ITO layer;
- and
- a sealant configured to encapsulate the flexible plastic substrate, the ITO layer and the sensing membrane, wherein a portion of an upper surface of the sensing membrane is exposed to form a sensing window;
- a readout circuit configured to read an output signal from the flexible pH sensor;
- and
- a conductor having a first end connected to the flexible pH sensor and a second end connected to the readout circuit.
6 more elements
Dependencies are inferred from the claim text.