The research of relationship between the void of DBC and the temperature distribution

DBC (Direct bonding Copper) is the most common substrate of IGBT power module in recent years. The existence of voids between the copper and the ceramic is the main process defect. The temperature distribution is multiple because of the differences in the ratio and location of the voids. In this paper, the integration of the test and numerical simulation is used to research the temperature distribution of DBC with different ratios of voids and loads. The results show that the location of the voids between the copper and the ceramic influence the temperature distribution of DBC clearly.