Design aspects of MOS-controlled thyristor elements: technology,simulation, and experimental results |
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Authors: | Bauer F Halder E Hofmann K Haddon H Roggwiller P Stockmeier T Burgler J Fichtner W Muller S Westermann M Moret J-M Vuilleumier R |
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Affiliation: | ABB Corp. Res. Center, Baden; |
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Abstract: | 2.5-kV thyristor devices have been fabricated with integrated MOS controlled n+-emitter shorts and a bipolar turn-on gate using a p-channel DMOS technology. Square-cell geometries with pitch variations ranging from 15 to 30 μm were implemented in one- and two-dimensional arrays with up to 20000 units. The impact of the cell pitch on the turn-off performance and the on-state voltage was studied for arrays with constant cathode area as well as for single-cell structures. By realizing MOS components with submicrometer channel lengths, scaled single cells are shown to turn off with current densities of several kiloamperes per square centimeter at a gate bias of 5 V. In the case of multi-cell ensembles, turn-off performance is limited due to inhomogeneous current distribution. Critical process parameters as well as the device behavior were optimized through multidimensional numerical simulation |
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