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Proceedings Paper

High-frequency noise in FDSOI MOSFETs: a Monte Carlo investigation
Author(s): Raul Rengel; Javier Mateos; Daniel Pardo; Tomas Gonzalez; Maria Jesus Martin; Gilles Dambrine; Francois Danneville; Jean-Pierre Raskin
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Paper Abstract

Due to the enormous industrial interest of the SOI MOSFET technology, a proper understanding of the physics underlying the behavior of these devices is necessary in order to optimize their high frequency performance. In this work, we study the static, dynamic and noise characteristics of FDSOI MOSFET’s by means of numerical simulations validated by comparison with experimental data. For this purpose, we use a 2D Ensemble Monte Carlo simulator, taking into account, in an appropriate manner, the physical topology of a fabricated 0.25 μm gate-length FDSOI transistor. Important effects appearing in real transistors, such as surface charges, contact resistances, impact ionization phenomena and extrinsic parasitics are included in the simulation. This allows to accurately reproduce the experimental behavior of static and dynamic parameters (output and transference characteristics, gm/ID ratio, capacitances, etc.). Moreover, results are explained by means of internal quantities such as concentration, velocity or energy of carriers. The results of the Monte Carlo simulations for the typical four noise parameters (NFmin, Gass, Rn, \Gamma opt) of the 0.25 μm FDSOI MOSFET also show an exceptional agreement with experimental data. Once the reliability of the simulator has been confirmed, a full study of the noise characteristics of the device (noise sources, drain spectral densities, α, β and C parameters, etc.) is performed. Taking advantage of the possibilities of the Monte Carlo method as a pseudo-experimental approach, the influence on these noise characteristics of the variation of some geometry parameters (i.e., downscaling the gate length, thickness of the active layer or inclusion of HALO regions) is evaluated an interpreted in terms of microscopic transport processes.

Paper Details

Date Published: 12 May 2003
PDF: 8 pages
Proc. SPIE 5113, Noise in Devices and Circuits, (12 May 2003); doi: 10.1117/12.490176
Show Author Affiliations
Raul Rengel, Univ. de Salamanca (Spain)
Javier Mateos, Univ. de Salamanca (Spain)
Daniel Pardo, Univ. de Salamanca (Spain)
Tomas Gonzalez, Univ. de Salamanca (Spain)
Maria Jesus Martin, Univ. de Salamanca (Spain)
Gilles Dambrine, Institut d'Electronique, de Microelectronique et de Nanotechnologie (France)
Francois Danneville, Institut d'Electronique, de Microelectronique et de Nanotechnologie (France)
Jean-Pierre Raskin, Univ. Catholique de Louvain (Belgium)


Published in SPIE Proceedings Vol. 5113:
Noise in Devices and Circuits
M. Jamal Deen; Zeynep Celik-Butler; Michael E. Levinshtein, Editor(s)

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