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Simulation of DC Characteristics of Nano-Scale Hydrogen-Terminated Diamond MISFETs

Published online by Cambridge University Press:  28 August 2013

Xi Zhou ,
Frances Williams  and
Sacharia Albin
Xi Zhou
Affiliation:
Department of Engineering, Norfolk State University Norfolk, VA 23504, U.S.A.
Frances Williams
Affiliation:
Department of Engineering, Norfolk State University Norfolk, VA 23504, U.S.A.
Sacharia Albin
Affiliation:
Department of Engineering, Norfolk State University Norfolk, VA 23504, U.S.A.
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Abstract

An improved 2D device model is generated to simulate the DC properties of hydrogen- terminated diamond MISFETs by taking into account the effect of electric field on hole mobility. At high lateral field, the mobility degrades due to velocity saturation and at high transverse field, the mobility decreases because of strong surface phonon scattering. As either field increases to a certain level (∼ 1MV/cm), the mobility becomes independent of doping concentration and the maximum transverse field appears at the boundary between surface acceptor region and bulk. The threshold voltage is found to be a strong function of gate length and can change from negative to positive, which will change the operation mode of the device. In addition, the simulation also shows that the transconductance reaches a maximum value at 80nm gate length but decreases after further shrinkage, which might be also related to the velocity saturation effect induced by large lateral field.

Keywords

diamondsimulationelectrical properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1551: Symposium R – Nanostructured Semiconductors and Nanotechnology , 2013 , pp. 123 - 128
Copyright
Copyright © Materials Research Society 2013 

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