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An Improved Methodology for the CAD Optimization of Multiple Floating Field-Limiting Ring Terminations

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5 Author(s)
El Baradai, N. ; Dipt. di Elettron., Politec. di Torino, Torino, Italy ; Sanfilippo, C. ; Carta, R. ; Cappelluti, F.
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We derive an efficient and accurate computer-aided-design-based design methodology for the optimization of floating field-limiting ring terminations. The proposed approach is based on an iterative optimization of the ring-to-ring spacings starting from the outermost ring and proceeding back toward the main junction. Physics-based simulations show that each optimization step does not impair the previous one, thus allowing to easily identify the minimum number of rings needed to achieve the desired termination efficiency yet minimizing the number of simulation steps. The accuracy of the method is thoroughly discussed on the basis of comparisons against either literature results or experimental data.

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Electron Devices, IEEE Transactions on  (Volume:58 ,  Issue: 1 )