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    题名: A nanowire WO3 humidity sensor integrated with micro-heater and inverting amplifier circuit on chip manufactured using CMOS-MEMS technique
    作者: Wu, C.C.
    贡献者: 淡江大學機械與機電工程學系
    关键词: Humidity sensor;CMOS;Micro-heater;Inverting amplifier circuit
    日期: 2007-04
    上传时间: 2011-10-20 21:35:20 (UTC+8)
    摘要: The fabrication of a nanowire WO3 humidity sensor integrated with an inverting amplifier circuit and a micro-heater on a chip using the commercial 0.35 μm complementary metal oxide semiconductor (CMOS) process and a post-process have been implemented. The humidity sensor is composed of a sensing resistor and a humidity sensing film. Tungsten trioxide prepared by a sol–gel method is adopted as the humidity sensing film. The fabrication of the humidity sensor requires a post-process to etch the sacrificial layers and to expose the sensing resistor, and then the humidity sensing film is coated over the sensing resistor. The humidity sensor, which is a resistive type, changes the resistance when the sensing film adsorbs or desorbs water vapor. An inverting amplifier circuit is utilized to convert the resistance of the humidity sensor into the voltage output. The micro-heater is utilized to provide a super-ambient working temperature to the humidity sensor, which can avoid the humidity sensor to generate the signal drift. Experimental results show that the sensitivity of the humidity sensor is about 4.5 mV/% RH at 60 °C.
    關聯: Sensors and Actuators B123, pp.896-901
    DOI: 10.1016/j.snb.2006.10.055
    显示于类别:[機械與機電工程學系暨研究所] 期刊論文

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