Microstructure coarsening during static annealing of 60Sn40Pb solder joints: I stereology

被引：0
|
作者：
Kang Jung
Hans Conrad
机构：
[1] North Carolina State University,Materials Science and Engineering Department
来源：
Journal of Electronic Materials | 2001年 / 30卷
关键词：
Solder joints; phase size distribution; positive skew; log-normal function; time invariant; shape factor;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The phase size distributions (PSDs) of the Sn, Pb, and the combined Pb and Sn phases, and the shape factor δ were determined for as-reflowed 60Sn40Pb solder joints and following their annealing at 50°C to 150°C. The PSDs in all cases had a positive skew which was approximated by a log-normal function. The PSDs were time invariant and were in accord with the Bitti and Nunzio model for phase coarsening. The shape factor, δ, decreased with the mean of the combined Pb and Sn phase size, and with temperature. Whether or not δ affects the PSDs is not clear.
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页码：1294 / 1302
页数：8
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