Previously, a Power Electronics Technology article titled “Inverted Acoustic System Cuts IGBT Failures” (September 2011) examined the use of an acoustic microscope to image heat-blocking defects such ...
IGBT failures are often caused by gap-types defects in or among the materials bonded to create the module. The defects may be voids, delaminations, disbonds, or may involve the tilting of a layer, ...
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