In this work we have investigated the results obtained using fault isolation techniques such as EMMI, OBIRCH and OBIC on a Wide band gap power device and in particular a 4H-SiC. We used YLF laser and Green Laser and showed the differences in the resulting hot spots. In the selected point, FIB cross sectioning and EDS analysis was performed. Once that the defect was shown, the differences the fault isolation results were discussed.

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