Length Distribution Analysis for Tin Whisker Growth

Yuki Fukuda; Michael Osterman; Michael Pecht

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Length Distribution Analysis for Tin Whisker Growth

机译：锡晶须生长的长度分布分析

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The global movement to lead-free electronics has led semiconductor device assemblers to switch terminals and finishes from lead-based to pure tin or high tin lead-free alloys. This transition has resulted in a reliability concern associated with the formation of conductive tin whiskers, which can grow from a device terminal or lead and cause current leakage or short circuits. This paper presents the results of an experimental study on tin whisker growth. Test specimens consisted of matte and bright tin finishes on copper, Alloy-42, and brass substrate materials. The heat treatments included annealing and two types of simulated reflow. Maximum whisker length and whisker density were measured on 24 different types of tin-plated specimens, after three, eight, and 16 months of room ambient storage after various heat treatments

机译：全球向无铅电子的运动已促使半导体器件组装商将端子和表面处理从铅基合金转变为纯锡或高锡无铅合金。这种过渡导致了与导电锡晶须形成相关的可靠性问题，该导电锡晶须可能会从设备端子或引线中生长出来，并导致电流泄漏或短路。本文介绍了锡晶须生长的实验研究结果。测试样本包括铜，合金42和黄铜基材上的哑光和光亮锡涂层。热处理包括退火和两种类型的模拟回流。在经过各种热处理后，在室温下存放三个，八个和十六个月后，对24种不同类型的镀锡样品测量了最大晶须长度和晶须密度

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《IEEE transactions on electronics packaging manufacturing》 |2007年第2007期|p.36-40|共5页
作者
Yuki Fukuda; Michael Osterman; Michael Pecht;
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正文语种 eng
中图分类电真空器件制造工艺;
关键词
heat treatment; tin; whiskers (crystal); Sn; brass substrate materials; length distribution analysis; tin finishes; tin whisker growth; Annealing; density; length; matte Sn; reflow; tin whiskers;

机译：热处理;锡;晶须（晶体）;锡;黄铜基底材料;长度分布分析;锡精加工;锡晶须生长;退火;密度;长度;无光泽锡;回流焊;锡晶须;

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1. The probabilistic distribution of metal whisker lengths [J] . D. Niraula, V. G. Karpov Journal of Applied Physics . 2015,第20期

机译：金属晶须长度的概率分布
2. The influence of non-uniform copper oxide layer on tin whisker growth and tin whisker growth behavior in SnAg microbumps with small diameter [J] . Li Yuancheng, Sun Menglong, Ren Siru, Materials Letters . 2020,第Jana1期

机译：氧化铜层不均匀对小直径SnAg微凸点锡晶须生长和锡晶须生长行为的影响
3. Growth estimations of the Argentinean wedge clam Donax hanleyanus: A comparison between length-frequency distribution and size-increment analysis [J] . Marko Herrmann, Mauro L. Lepore, Juergen Laudien, Journal of Experimental Marine Biology and Ecology . 2009,第1a2期

机译：阿根廷楔形蛤Donax hanleyanus的生长估计：长度-频率分布和大小增量分析之间的比较
4. Study of tin whisker growth accelerated by rare earth phase and the mechanism of tin whisker growth [C] . Hao Hu, He Hongwen, Lu Yuan 2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices amp; Workshop on Piezoresponse Force Microscopy . 2014

机译：稀土相促进锡晶须生长及其机理的研究
5. Tin Whisker Growth and Mitigation with a Nanocrysytalline Nickel Coating. [D] . Janiuk, Szymon. 2015

机译：纳米晶镍镀层的锡晶须生长和缓解。
6. Long intrinsic horizontal axons radiating through and beyond rat barrel cortex have spatial distributions similar to horizontal spreads of activity evoked by whisker stimulation [O] . B.A. Johnson, R.D. Frostig -1

机译：辐射穿过大鼠桶皮层并超出其范围的长的固有水平轴突的空间分布类似于晶须刺激引起的活动水平扩散
7. Figure 6: Distribution of SNPs between chromosomes. (A) The average amount of SNPs per 1 MB per chromosome, distinguishing the varieties. The incut shows the dendrogram reflecting the total number of SNPs differentiating varieties. The colors show between which varieties the differences were considered (green is for S29↔YP, orange is for CS↔YP, blue is for S29↔CS). (B) The distribution of SNPs along the averaged chromosome. The boxes extend from the Q1 to Q3 quartile values of the data, with an orange line at the median (Q2). The whiskers extend from the edges of the box to show the range of the data. The position of the whiskers is set by 1.5 × IQR (IQR = Q3 − Q1) from the edges of the box. [O] . -1

机译：图6：染色体之间的SNP分布。（a）每条染色体每染色体每1mb的平均量，区分品种。 Imut显示了反映SNPS差异变化的总数的树枝图。颜色在哪些品种之间进行了考虑的差异（绿色是S29↔YP，橙色用于CS↔YP，蓝色为S29↔CS）。（b）沿着平均染色体的SNP分布。框从Q1到Q3四分位数的数据值，在中位数（Q2）处具有橙色线。晶须从框的边缘延伸以显示数据的范围。晶须的位置由从盒子的边缘设置为1.5×IQR（IQR = Q3-Q1）。

Length Distribution Analysis for Tin Whisker Growth

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