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Temperature Sensor Using Thin-Film Transistor

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3 Author(s)
Akihiro Nakashima ; Department of Electronics and Informatics, Ryukoku University, Seta, Japan ; Yuki Sagawa ; Mutsumi Kimura

We propose a temperature sensor using a thin-film transistor (TFT). First, we measure temperature dependence of a transistor characteristic and determine that it is suitable to employ off current. Next, we suggest a cell circuit consisting of one transistor and one capacitor and a driving method composed of initializing, holding, and detecting periods. Finally, we find that it is possible to detect temperature using this sensing scheme, for example, from the room temperature to 70°C. We think that it is promising to integrate this temperature sensor in some applications using TFTs.

Published in:

IEEE Sensors Journal  (Volume:11 ,  Issue: 4 )