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    題名: Fabrication of Wireless Micro Pressure Sensor Using the CMOS Process
    作者: Dai, Ching-Liang;Lu, Po-Wei;Wu, Chyan-Chyi;Chang, Chienliu
    貢獻者: 淡江大學機械與機電工程學系
    關鍵詞: wireless micro pressure sensor;CMOS-MEMS;oscillators
    日期: 2009-04
    上傳時間: 2011-10-20 21:38:53 (UTC+8)
    出版者: Basel: MDPI AG
    摘要: In this study, we fabricated a wireless micro FET (field effect transistor) pressure sensor based on the commercial CMOS (complementary metal oxide semiconductor) process and a post-process. The wireless micro pressure sensor is composed of a FET pressure sensor, an oscillator, an amplifier and an antenna. The oscillator is adopted to generate an ac signal, and the amplifier is used to amplify the sensing signal of the pressure sensor. The antenna is utilized to transmit the output voltage of the pressure sensor to a receiver. The pressure sensor is constructed by 16 sensing cells in parallel. Each sensing cell contains an MOS (metal oxide semiconductor) and a suspended membrane, which the gate of the MOS is the suspended membrane. The postprocess employs etchants to etch the sacrificial layers in the pressure sensor for releasing the suspended membranes, and a LPCVD (low pressure chemical vapor deposition) parylene is adopted to seal the etch holes in the pressure. Experimental results show that the pressure sensor has a sensitivity of 0.08 mV/kPa in the pressure range of 0–500 kPa and a wireless transmission distance of 10 cm.
    關聯: Sensors 9(11), pp.8748-8760
    DOI: 10.3390/s91108748
    顯示於類別:[機械與機電工程學系暨研究所] 期刊論文

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