BSIM-IMG: A Compact Model for Ultrathin-Body SOI MOSFETs With Back-Gate Control

Sourabh Khandelwal, Yogesh Singh Chauhan, Darsen D. Lu, Sriramkumar Venugopalan, Muhammed Ahosan Ul Karim, Angada B. Sachid, Bich-Yen Nguyen, O. Rozeau, Olivier Faynot, Ali M. Niknejad,

IEEE Transactions on Electron Devices · 2012 · 105 citations · 23 references

Concepts

Abstract

In this paper, we present an accurate and computationally efficient model for circuit simulation of ultrathin-body silicon-on-insulator MOSFETs with strong back-gate control. This work advances previous works in terms of numerical accuracy, computational efficiency, and behavior of the higher order derivatives of the drain current. We propose a consistent analytical solution for the calculation of front- and back-gate surface potentials and inversion charge. The accuracy of our surface potential calculation is on the order of nanovolts. The drain current model includes velocity saturation, channel-length modulation, mobility degradation, quantum confinement effect, drain-induced barrier lowering, and self-heating effect. The model has correct behavior for derivatives of the drain current and shows an excellent agreement with experimental data for long- and short-channel devices with 8-nm-thin silicon body and 10-nm-thin BOX.

References

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