Abstract
In this paper, we have analyzed the effect of chiral vector, temperature, metal work function, channel length and High-K dielectric on threshold voltage of CNTFET devices. We have also compared the effect of oxide thickness on gate capacitance and justified the advantage a CNTFET provides over MOSFET in nanometer regime. Simulation on HSPICE tool shows that high threshold voltage can be achieved at low chiral vector pair in CNTFET. It is also observed that the temperature has a negligible effect on threshold voltage of CNTFET. After that we have simulated and observed the effect of channel length variation on threshold voltage of CNTFET as well as MOSFET devices and given a theoretical analysis on it. We found an unusual, yet, favorable characteristics that the threshold voltage increases with decreasing channel length in CNTFET devices in deep nanometer regime.
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