P1.5.3 Gas Sensing Characteristics of Low-powered Dual MOSFET Hydrogen Sensors

Bum-Joon Kim, Jin-Ho Yoon & Jung-Sik Kim
A low-powered hydrogen sensitive dual-MOSFET device was designed, fabricated and characterized for self compensation to electric signal degradation. Differential outputs in both sensitive and reference FETs were stable for changes in the outer environments due to the same dependence of the electrical characteristics. The proposed sensor design showed low power consumption (45.5 mW at 150°C) by achieving complete heat isolation. Stable responses to H2 gas were observed over a range of temperatures and the optimal...