Humidity Sensors with Shielding Electrode Under Interdigitated Electrode
AbstractRecently, humidity sensors have been investigated extensively due to their broad applications in chip fabrication, health care, agriculture, amongst others. We propose a capacitive humidity sensor with a shielding electrode under the interdigitated electrode (SIDE) based on polyimide (PI). Thanks to the shielding electrode, this humidity sensor combines the high sensitivity of parallel plate capacitive sensors and the fast response of interdigitated electrode capacitive sensors. We use COMSOL Multiphysics to design and optimize the SIDE structure. The experimental data show very good agreement with the simulation. The sensitivity of the SIDE sensor is 0.0063% ± 0.0002% RH. Its response/recovery time is 20 s/22 s. The maximum capacitance drift under different relative humidity is 1.28% RH. View Full-Text
A printed edition of this Special Issue is available here.
Share & Cite This Article
Liu, H.; Wang, Q.; Sheng, W.; Wang, X.; Zhang, K.; Du, L.; Zhou, J. Humidity Sensors with Shielding Electrode Under Interdigitated Electrode. Sensors 2019, 19, 659.
Liu H, Wang Q, Sheng W, Wang X, Zhang K, Du L, Zhou J. Humidity Sensors with Shielding Electrode Under Interdigitated Electrode. Sensors. 2019; 19(3):659.Chicago/Turabian Style
Liu, Hong; Wang, Qi; Sheng, Wenjie; Wang, Xubo; Zhang, Kaidi; Du, Lin; Zhou, Jia. 2019. "Humidity Sensors with Shielding Electrode Under Interdigitated Electrode." Sensors 19, no. 3: 659.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.