Assembly Reliability of eWLP, Die- and Die-Size BGA

R. Ghaffarian
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引用次数: 0

Abstract

This paper presents assembly challenges as well as solder joint thermal-cycle reliability of mixed area array packaging and flip-chip die technologies. These were: (1) eWLP-LGA, 196 land patterns, 0.4mm pitch, (2) Cu-FC (CC80), flip-chip die with copper pillar, 1048 bumps, and (3) CVBGA, 360 balls, 0.4mm pitch and with either lead-free or tin-lead solder balls.Twenty-seven (27) PCBs were assembled with a number of variables and rejected assemblies. Acceptable assemblies with and without underfill were subjected to thermal cycling between –40°C and 125°C for solder-joint reliability characterization and failure-mechanism assessments. The 2-parameter Weibull plots delineated cumulative failures and optical X-sectional characterization presented failure mechanisms and locations.
eWLP的装配可靠性,模具和模具尺寸BGA
本文介绍了混合区域阵列封装和倒装芯片技术的组装挑战以及焊点热循环可靠性。这些是:(1)eWLP-LGA, 196个陆地图案,0.4mm间距,(2)Cu-FC (CC80),带铜柱的倒装芯片,1048个凸起,以及(3)CVBGA, 360个球,0.4mm间距,无铅或锡铅焊料球。二十七(27)个pcb装配了一些变量和拒绝装配。在-40°C和125°C之间进行热循环,以进行焊接可靠性表征和失效机制评估。2参数威布尔图描绘了累积失效,光学x -切片表征了失效机制和位置。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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