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Published in: Journal of Computational Electronics 1/2018

11-10-2017

3D analytical modeling of surface potential, threshold voltage, and subthreshold swing in dual-material-gate (DMG) SOI FinFETs

Authors: Rajesh Saha, Srimanta Baishya, Brinda Bhowmick

Published in: Journal of Computational Electronics | Issue 1/2018

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Abstract

Here, we develop a 3D analytical model for potential in a lightly doped dual-material-gate FinFET in the subthreshold region. The model is based on the perimeter-weighted sum of a dual-material double-gate (DMDG) asymmetric MOSFET and a DMDG symmetric MOSFET. The potential model is used to determine the minimum surface potential needed to obtain the threshold voltage \((V_{\mathrm{T}})\) and subthreshold swing (SS) by considering the source barrier changes in the leakiest channel path. The proposed model is capable of reducing the drain-induced barrier lowering (DIBL) as well as the hot carrier effects offered by this device. The impact of control gate ratio and work function difference between the two metal gates on \(V_{\mathrm{T}}\) and SS are also correctly established by the model. All model derivations are validated by comparing the results with technology computer-aided design (TCAD) simulation data.

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Metadata
Title
3D analytical modeling of surface potential, threshold voltage, and subthreshold swing in dual-material-gate (DMG) SOI FinFETs
Authors
Rajesh Saha
Srimanta Baishya
Brinda Bhowmick
Publication date
11-10-2017
Publisher
Springer US
Published in
Journal of Computational Electronics / Issue 1/2018
Print ISSN: 1569-8025
Electronic ISSN: 1572-8137
DOI
https://doi.org/10.1007/s10825-017-1072-x

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