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Fabrication of Capacitive-Type Humidity Sensor with Poly(p-phenylene ether sulfone)  

Cho, Jae-Ick (Korea Institute of Ceramic Eng. & Tech.)
Choi, Kyoon (Korea Institute of Ceramic Eng. & Tech.)
Kim, Chang-Jung (Korea Institute of Ceramic Eng. & Tech.)
Kim, Byung-Ik (Korea Institute of Ceramic Eng. & Tech.)
Park, Sueng-Hyun (GBM Inc., Ltd.)
Bang, Gi-Suk (GBM Inc., Ltd.)
Publication Information
Polymer(Korea) / v.30, no.3, 2006 , pp. 207-209 More about this Journal
Abstract
We fabricated a capacitive-type humidity sensor using poly (p-phenylene ether sulfone: PES) as a humidity sensitive layer. The PES was dissolved in m-cresol $(CH_3C_6H_4OH)$ and spin-coated on ITO-coated glass substrate. Gold was deposited by sputtering as a water-permeable upper electrode. The capacitance of the sensor was inversely proportional to sensing film thicknesses and showed an excellent linearity of less than 1% in the humidity range of 20 to 90%. The sensor haying a $1.4{\mu}m$ sensing layer showed a hysteresis of 1.3% and a good sensitivity of 1.14 at 20 kHz.
Keywords
humidity sensor; sulfone; capacitive-type; p-phenylene ether sulfone;
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