Abstract
Based on the approximate solution of Poisson’s equation in the case of a p-doped silicon body, an improved current-voltage characteristic model of long-channel cylindrical surrounding-gate Si nanowire MOSFET is proposed. The improvement itself considers a realistic description of the carriers’ mobility degradation owing to the radial electric field and a more detailed and accurate analytical solution to the 1D Poisson’s equation than the solutions available in the literature. The model is valid in the wide range of the doping concentration and shows a satisfactory level of agreement with the two-dimensional simulation results and the former models. It can also be applied to different operation regimes such as subthreshold, linear and saturation regimes.
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