Switching ruggedness and surge‐current capability of diodes using the self‐adjusting p emitter efficiency diode concept

Autor: Hans-Joachim Schulze, Franz-Josef Niedernostheide, Roman Baburske, Hans Peter Felsl, Josef Lutz, Manfred Pfaffenlehner, Thomas Basler, Frank Pfirsch
Rok vydání: 2014
Předmět:
Zdroj: IET Circuits, Devices & Systems. 8:205-212
ISSN: 1751-8598
1751-858X
Popis: The surge-current ruggedness of free-wheeling diodes can be improved by implementing the self-adjusting p emitter efficiency diode concept (SPEED). Simulations indicate that the switching ruggedness is reduced because of the occurrence of cathode-side filaments during reverse-recovery. Experiments confirm the weak switching performance of such a diode in comparison to a conventional diode. By implementing the controlled injection of backside holes concept cathode-side filaments can be suppressed. However, this measure is not sufficient to regain the switching ruggedness of a conventional diode. It is also necessary to fully embed the p + -areas of the SPEED anode in the low-doped p-type area to avoid high electrical field strengths at the p + p-junction and pinning of anode-side filaments. However, anode-side adjustments for improving the switching ruggedness can reduce the benefit of the SPEED concept regarding the surge-current capability.
Databáze: OpenAIRE
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