Knee Pain

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Analyzing the dynamics of current filaments is essential for a correct understanding of SOA limitations. Current filaments can occur during the reverse-recovery period of p+-n--n+ diodes. In this work, we apply the results from an analysis of the plasma-front dynamics for the one-dimensional case to conditions under which current filaments appear in the depletion layers due to dynamic avalanche. We show that the anode-side plasma front velocity is higher in the vicinity of the filament than far away from the filament center, favoring the evolution of a lateral traveling anode-side filament. Furthermore, we find that the cathode-side plasma front changes its vertical propagation direction when a dynamic avalanche in the cathode-side depletion layer causes current crowding. As a result, the cathode-side depletion layer in the vicinity of the filament decreases, favoring the formation of a standing cathode-side filament that may cause final destruction of the device. The analytical results are in good agreement with numerical simulations and results of previously published work.




Dinger, S. W. (2006). Knee Pain. In Decision Making in Pain Management (pp. 220–221). Elsevier Inc.

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