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Investigations on power cycling induced fatigue failure of IGBTs with silver sinterea interconnects

 
: Dudek, R.; Doring, R.; Rzepka, S.; Ehrhardt, C.; Hutter, M.; Rudzki, J.; Osterwald, F.; Eisele, R.; Stegmeier, S.; Weidner, K.; Rittner, M.

International Microelectronics and Packaging Society -IMAPS-; Institute of Electrical and Electronics Engineers -IEEE-:
20th European Microelectronics and Packaging Conference & Exhibition, EMPC 2015 : Enabling technologies for a better life and future, Friedrichshafen, Germany, 14-16 September 2015
Piscataway, NJ: IEEE, 2015
ISBN: 978-0-9568086-1-5
ISBN: 978-0-9568086-2-2
pp.198-228
European Microelectronics and Packaging Conference & Exhibition (EMPC) <20, 2015, Friedrichshafen>
English
Conference Paper
Fraunhofer ENAS ()
Fraunhofer IZM ()

Abstract
Because of the need for electronics use at temperatures beyond 150 deg C, new high temperature interconnection technologies emerge, like silver sintering and copper wire bonding. In the project PROPOWER inverter modules with IGBTs and diodes mounted on DBC substrates were investigated as a prototype. Analyses were made to study the effects of the new interconnect technologies on fatigue failure. It is one basic question for the replacement of solders by sinter silver to what extend the failure behaviour depends on the kind of loading, that means passive thermal cycling versus active thermal cycling, and how it relates to solder fatigue failure. These questions were addressed by passive thermal cycling and in particular by different kinds of power cycling. Failure modes different from those observed with traditional interconnection technologies were detected. Finite element (FE-) analyses were made to understand the thermo-mechanical stresses, which cause these failures.

: http://publica.fraunhofer.de/documents/N-422457.html