Substrate-to-base solder joint reliability in high power IGBT modules |
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Authors: | E. Herr T. Frey R. Schlegel A. Stuck R. Zehringer |
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Abstract: | Acoustic microscope imaging proved to be an excellent tool to detect and quantify solder fatigue of the substrate to base interface of high power IGBT modules. This technique was used to establish the dependence of the thermal cycling capability on the temperature swing of the module base for a A1N/Cu system. Results from temperature cycling tests were combined with results from power cycling tests to predict the solder joint reliability over a wide range of temperature excursions. |
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