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80 SMT007 MAGAZINE I APRIL 2018 Conclusions From our testing we were able to see that the material that has the highest number of favor- able rankings is material F. This material was able to perform well under thermal and flex- ural tests, therefore opening up applications that require these types of characteristics. The material that had the second highest number of favorable rankings was material G with mate- rial H following with third highest. SMT007 Acknowledgements Many thanks to Flex Advanced Engineering Group in supporting this project: Jesus Tan, Fran- coise Sarrazin, Ellen Ray, and Christopher Vu. Editor's Note: This article was originally published in the proceedings of SMTA International 2016. Authors Zohair Mehkri is Manager, Worldwide Assembly Technology, at Flex. David Geiger is Director, Worldwide Assembly and Test Tech, at Flex Anwar Mohammed, PhD, is a senior director at Flex. Murad Kurwa was previously the vice president of the Advance Engineering Group at Flex (no longer with Flex.) Figure 10: Qualitative analysis—optical checking and SEM results. Figure 11: Summary of all test results. Zohair Mehkri David Geiger Anwar Mohammed