Two dimensional numerical modeling of short channel Si-SiO2 MOSFET

Madheswaran Muthusamy; Ananthi Govindasamy D.V.M.; Rajamani Vayanaperumal

doi:10.1117/12.618351

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12 September 2005 Two dimensional numerical modeling of short channel S_i-S_iO₂ MOSFET

Madheswaran Muthusamy, Ananthi Govindasamy D.V.M., Rajamani Vayanaperumal

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Proceedings Volume 5925, Nanophotonic Materials and Systems II; 59250Z (2005) https://doi.org/10.1117/12.618351
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The paper deals with 2D numerical modeling of Si-SiO₂ MOSFET for considering the field dependent mobility of the carriers in the surface channel. The fundamental device equations have been numerically solved to obtain various characteristics and parameters. The surface potential and electric field profile in the channel have been numerically estimated to have indepth analysis. The model enables one to estimate various parameters which determine the potential use of this device for various applications. The noise analysis of the device has been carried out to study the performance of the device. The exact solution of the 2D Poisson's equation for the S_i-S_iO₂ MOSFET's is derived by using Liebmann's iteration method. Based on the derived 2D potential distribution, the surface potential distribution in the S_i film is numerically obtained and their accuracy is verified by 2D analytical analysis. The calculated minimum surface potential and its location are used to analyze the drain-induced barrier-lowering effect and further to develop numerical threshold - voltage model. It is shown that excellent agreements are obtained for wide ranges of device structure parameters and applied biases.

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Madheswaran Muthusamy, Ananthi Govindasamy D.V.M., and Rajamani Vayanaperumal "Two dimensional numerical modeling of short channel S_i-S_iO₂ MOSFET", Proc. SPIE 5925, Nanophotonic Materials and Systems II, 59250Z (12 September 2005); https://doi.org/10.1117/12.618351

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