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The effect of variations in temperature cycling profile and mechanical properties of solder on thermo-mechanical reliability of a lead-free BGA package
Jönköping University, Jönköping, Sweden.
Saab AB (publ.)/Avionics Systems, Jönköping, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut.
RISE, SP – Sveriges Tekniska Forskningsinstitut.ORCID iD: 0000-0002-6730-0214
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2015 (English)In: Proceedings of the 16th International Conference IEEE EuroSimE 2015, 2015, 165-169 p.Conference paper, Published paper (Refereed)
Abstract [en]

The paper investigates the effect of variations both in temperature cycling profile and in SAC305 solder Young's modulus in the PBGA256 package on the thermo-mechanical reliability. FE simulations quantify the effect of cycle reduction and counting techniques by introducing different temperature profiles having identical dwell- and period time characteristics. A difference of 30% in predicted accumulated creep strain energy density per cycle has been determined for the studied profiles. Under the provided modelling assumptions and simplifications, the maximum variation of the thermal fatigue life of SAC305 solder joints is within 30% as the result of experimentally determined Young's modulus variation in as-delivered packages.

Place, publisher, year, edition, pages
2015. 165-169 p.
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Natural Sciences
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URN: urn:nbn:se:ri:diva-632DOI: 10.1109/EuroSimE.2015.7103102ISBN: 978-1-4799-9949-1 (print)OAI: oai:DiVA.org:ri-632DiVA: diva2:944516
Conference
16th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE), 19-22 April 2015.Budapest, Hungary
Available from: 2016-06-29 Created: 2016-06-29 Last updated: 2017-05-08Bibliographically approved

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