Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Novel test concept for experimental lifetime prediction of miniaturized lead-free solder contacts

: Roellig, M.; Dudek, R.; Wiese, S.; Wunderle, B.; Wolter, K.-J.; Michel, B.


Institute of Electrical and Electronics Engineers -IEEE-:
28th International Spring Seminar on Electronics Technology 2005 : May 19 - 22, 2005, Wiener Neustadt, Austria
New York, NY: IEEE, 2005
ISBN: 0-7803-9324-4
International Spring Seminar on Electronics Technology (ISSE) <28, 2005, Wiener Neustadt>
Conference Paper
Fraunhofer IZM ()

The paper presents the method of generating lifetime-prediction-laws on special prepared specimen. The combination of thin- and thick-film technology allows building up test probes very similar to electronic packages including the measurement issues. Influences of pad surface metallurgy, microstructure of solder and ineutectic solder alloys will be regarded. The investigation objects provide monitoring of electrical and mechanical damage process of SnAgCu-solder bump. Different thermo-mechanical loads will be applied in ranges of 0°C to +80°C, -20°C to +90°C, -40°C to + 125°C and -50°C to + 150°C. The results of these tests and will give universal lifetime-prediction laws for SnAgCu base solder joints. Main goals are to find coefficients for lifetime prediction models of lead-free SAC-solder. One issue points on the Coffin-Mason relation, which can be used in common FEM-tool. The other problem employs the empirical model of Norris-Landzberg relation.