Modelling of metal degradation in power devices under active cycling conditions

Metal degradation has recently received increased attention as a failure mechanism in power devices under active cycling conditions, i.e. under repeated pulsed voltage/current loads. Both electro-thermal and thermo-mechanical simulation are indispensable for understanding this mechanisms. The paper presents experimental and simulation data for a dedicated test structure. A suitable lifetime model has to go beyond a simple Coffin-Manson type model to capture the essential influencing parameters.