• Proceedings of the KIEE Conference
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• 2003.07c
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• pp.1511-1513
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• 2003

본 논문에서는 polyimide를 감습물질로 한 정전용량형 정밀습도센서를 개발하여 실용화한 결과를 보고한다. 유리기판에 제작된 습도센서는 상대습도 11%RH${\sim}$96%RH 범위에서 다음과 같은 특성을 나타내었다. 감도; 0.5689 pF/%RH, 비선형성; 1.5%RH 미만, 히스테리시스; 약 1.5%RH, 감도특성의 온도 의존성; 0.08pF/$^{\circ}C$, 주파수 특성; 10, 100kHz에서 직선적.

• Journal of the Korean Electrochemical Society
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• v.2 no.1
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• pp.17-22
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• 1999

Since the use of porous silicon for microsensors and microactuators is in the euly stage of study, only several application devices, such as light-emitting diodes and chemical sensors have so far been demonstrated. In this paper we present an overview of the present status of porous silicon sensors and actuators research with special emphasis on the applications of chemical sensors and optical devices. The capacitive type porous silicon humidity sensors had a nonlinear capacitance-humidity characteristic and a good sensitivity at higher humidity above $40\%RH$. The porous silicon $n^+-p-n^+$ device showed a sharp increase in current when exposed to an ethanol vapor. The $p^+-PSi-n^+$ diode fabricated on porous silicon diaphragm exhibited an optical switching characteristic, opening up its utility as an optical sensor or switch. The photoluminescence (PL) spectrum, taken from porous silicon under 365 nm excitation, had a broad emission, peaked at -610 nm. The electroluminescence(EL) from ITO/PSi/In LED had a broader spectrum with a blue shifted peak at around 535nm than that of the PL.