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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/109576

    Title: Fabrication and Characterization of a Micro Methanol Sensor Using the CMOS-MEMS Technique
    Authors: Fong, Chien-Fu;Dai, Ching-Liang;Wu, Chyan-Chyi
    Keywords: methanol sensor;tin dioxide;cadmium sulfide;heater
    Date: 2015-10-23
    Issue Date: 2017-02-24 02:11:23 (UTC+8)
    Publisher: M D P I AG
    Abstract: A methanol microsensor integrated with a micro heater manufactured using the complementary metal oxide semiconductor (CMOS)-microelectromechanical system (MEMS) technique was presented. The sensor has a capability of detecting low concentration methanol gas. Structure of the sensor is composed of interdigitated electrodes, a sensitive film and a heater. The heater located under the interdigitated electrodes is utilized to provide a working temperature to the sensitive film. The sensitive film prepared by the sol-gel method is tin dioxide doped cadmium sulfide, which is deposited on the interdigitated electrodes. To obtain the suspended structure and deposit the sensitive film, the sensor needs a post-CMOS process to etch the sacrificial silicon dioxide layer and silicon substrate. The methanol senor is a resistive type. A readout circuit converts the resistance variation of the sensor into the output voltage. The experimental results show that the methanol sensor has a sensitivity of 0.18 V/ppm.
    Relation: Sensors 15(10), pp.27047-27059
    DOI: 10.3390/s151027047
    Appears in Collections:[Graduate Institute & Department of Mechanical and Electro-Mechanical Engineering] Journal Article

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