PD-SOI MOSFET Performance Optimization for High Temperatures up to 400 °C Using Reverse Body Biasing

Conference: ANALOG 2013 - Entwicklung von Analogschaltungen mit CAE-Methoden - Vorträge der 13. ITG/GMM-Fachtagung
03/04/2013 - 03/06/2013 at Aachen, Deutschland

Proceedings: ANALOG 2013 - Entwicklung von Analogschaltungen mit CAE-Methoden

Pages: 5Language: englishTyp: PDF

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Schmidt, A.; Kappert, H.; Kokozinski, (Fraunhofer Institute for Microelectronic Circuits and Systems, Finkenstraße 61, 47057 Duisburg, Germany)

SOI (Silicon-on-Insulator) MOSFET device performance, i.e. intrinsic gain and bandwidth, in a wide temperature range up to 400 °C has so far been strongly affected by device leakage currents. Also the moderate inversion region as a desired point of operation has been unusable as leakage currents dominate drain currents at high temperatures. In this paper we present a reverse body-biasing (RBB) approach to reduce leakage currents and simultaneously improve the transistor’s performance up to 400 °C. Thereby operation in the lower moderate inversion region of the SOI transistor device is feasible. The method presented here allows beneficial FD (fully depleted) device characteristics in a 1.0 µm PD (partially depleted) SOI CMOS process. Split-Source NSOI and NHGATE devices with an H-shaped gate have been investigated. Results report a leakage current reduction of 97 % and a 670 % improvement of the gm/Id factor in the moderate inversion region the NHGATE device by applying the presented technique.