Non-uniform Temperature Distribution Implications on Thermal Analysis Accuracy of Si IGBTs and SiC MOSFETs

Being the power loss and temperature distribution in power-electronics semiconductor dies influenced by one another, this paper demonstrates that neglecting such an effect can result in significant errors in electro-thermal simulations and mistaken calculation of junction temperatures. Two case studies on different semiconductor technologies, namely Silicon Insulated-Gate Bipolar Transistors (IGBTs) and Silicon Carbide Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs), are presented to corroborate the paper findings. Resultant temperature distributions are obtained by a proposed flowchart, which accepts the corresponding power dissipation input from MATLAB environment and employs a finite element based analysis implemented in COMSOL Multiphysics environment.