An Improved Impact Ionization Model for SOI Circuit Simulation

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The impact ionization (II) model accuracy issue in industry standard SOI MOSFET is discussed in the paper. Based on Medici 2D simulation study, an improved impact ionization model is proposed which can capture the voltage and geometry dependence for impact ionization current contributed by the parasitic BJT collector current. The model is implemented into the BSIMSOI infrastructure in HSPICE. A reasonably good fit of the model to the 2D simulation results is obtained. The improved model facilitates the BSIMSOI application into deep subthreshold to accumulation regions where accurate II model is a prerequisite for novel memory circuit simulation.

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Journal: TechConnect Briefs
Volume: 3, Nanotechnology 2008: Microsystems, Photonics, Sensors, Fluidics, Modeling, and Simulation – Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 3
Published: June 1, 2008
Pages: 841 - 844
Industry sector: Sensors, MEMS, Electronics
Topics: Compact Modeling
ISBN: 978-1-4200-8505-1