Browsing by Author "Chen, Jin-Li"

Now showing 1 - 1 of 1

Development of FET-Type Reference Electrodes for pH-ISFET Applications
(2010)
Chang, Kow-Ming
;
Chang, Chih-Tien
;
Chao, Kuo-Yi
;
Chen, Jin-Li
;
電子工程學系及電子研究所
A reference field effect transistor (FET) fabrication method by using a perfluorosulfonated proton exchange membrane associated with ion-insensitive polymers is proposed. The single-layer film of the perfluorosulfonated polymer/photoresist composite among the eight films tested demonstrated the best performance of 5.8 mV/pH and 11.27 mV/pNa sensitivities. Meanwhile, the drift performances were 3.5 mV/h and less than 1 mV/h for the first and second 4 h tests. A high sensitivity of 52.1 mV/pH and a low interference of 4.61 mV/pNa were obtained in the range of pH 1-13 through the differential arrangement with ZrO(2) gate ion-sensitive field-effect transistors (ISFETs). Meanwhile, the transconductance match of the proposed reference FET/ISFET pair would simplify the differential readout circuits.