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Precision Dispensed Die Fillets as Nonconformal Surfaces for Printed Interconnects: Characterization, Optimization, and Mechanical Performance Assessment
IEEE Transactions on Components, Packaging and Manufacturing Technology ( IF 2.2 ) Pub Date : 2021-03-17 , DOI: 10.1109/tcpmt.2021.3066455
Ludovico Cestarollo , Mohammed Alhendi , Rajesh Sharma Sivasubramony , Gurvinder Singh Khinda , Darshana L. Weerawarne , Peter Borgesen , Mark D. Poliks , Nancy C. Stoffel , Joe Iannotti

The ability to fabricate smooth transitions between surfaces at different levels is critical for the establishment of robust printed interconnections in flexible hybrid electronics devices. In this article, precision dispensing of die fillets is proved to be a viable technology for that. A dispensing process is characterized and evaluated based, among others, on the principles of statistical design of experiments. The functionality of the fabricated fillets is evaluated through printing of conductive traces over them. Moreover, the performance of the printed conductive lines is assessed through tensile tests. Several solutions are engineered and tested to assure proper electrical behavior of the lines under fatigue cycling. Finally, it is shown that this process can be utilized to replace free-standing wire bonds.

中文翻译:

精密分配的模具圆角作为用于印刷互连的非保形表面:表征,优化和机械性能评估

在不同水平的表面之间制造平滑过渡的能力对于在柔性混合电子设备中建立坚固的印刷互连至关重要。在本文中,对角焊缝进行精确点胶被证明是一种可行的技术。除其他外,基于实验的统计设计原理对分配过程进行表征和评估。通过在圆角上印刷导电迹线可以评估制成的圆角的功能。此外,通过拉伸测试来评估印刷导线的性能。对几种解决方案进行了工程设计和测试,以确保在疲劳循环下线路具有适当的电气性能。最后,表明该方法可用于代替独立式引线键合。
更新日期:2021-04-27
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