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Buffer structures and edge termination have a decisive influence on the static and dynamic characteristics of free-wheeling diodes. In this paper the influence of buffer structures at the cathode side, the influence of the design of the edge termination and of a resistive zone at the anode side are analysed with respect to the ruggedness of free-wheeling diodes. Therefore, we investigated the device...
The influence of small doping inhomogeneities on the behavior of current filaments appearing in p + –n − –n + diodes during the reverse-recovery period under extreme turn-off conditions is investigated. It is shown that depending on the strength and the distance between the inhomogeneities, different types of filament dynamics may appear, resulting in irregular or regular hopping...
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