The behavior of Sn whisker growth on Sn-0.7Cu-0.05Ni solder joint during thermal cycling

IF 2.8 4区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Materials Science: Materials in Electronics Pub Date : 2024-11-12 DOI:10.1007/s10854-024-13805-9
Aimi Noorliyana Hashim, Mohd Arif Anuar Mohd Salleh, Muhammad Mahyiddin Ramli, Mohd Mustafa Al Bakri Abdullah, Andrei Victor Sandu, Petrica Vizureanu
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Abstract

The present study investigates the behavior of Sn whisker growth on Sn-0.7Cu-0.05Ni solder joints during thermal cycling conducted for 1500 cycles at temperature of − 40 (+ 0/− 10) °C and + 85 (+ 10/− 0) °C through industry standard practices JESD22-A121A established by the Joint Electron Device Engineering Council (JEDEC). Results determine that the growth rate of Sn whisker on the Sn-0.7Cu-0.05Ni solder joint was slower than the Sn-0.7Cu solder joint and consequently show that the 0.05% addition of Ni is able to suppress the growth of Sn whisker during thermal cycling. Furthermore, the stabilization of hexagonal η-Cu6Sn5 of (Cu,Ni)6Sn5 IMC interfacial layer in Sn-0.7Cu-0.05Ni solder joints significantly contributes to a lower coefficient of thermal expansion (CTE) compared to Cu6Sn5 IMC interfacial layer, thereby reducing thermal mismatch stress for Sn whisker growth on the Sn0.7Cu0.05Ni solder joint. The implications of this study are substantial for effective approach to mitigate Sn whiskers growth through consistent inspection protocols and adherence to industry standard practices.

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热循环期间锡-0.7 铜-0.05 镍焊点上锡晶须的生长行为
本研究通过电子器件工程联合委员会(JEDEC)制定的行业标准 JESD22-A121A,对锡-0.7铜-0.05镍焊点在-40(+ 0/- 10)℃和+85(+ 10/- 0)℃温度下进行 1500 次热循环时的锡晶须生长行为进行了调查。结果表明,锡-0.7 铜-0.05 镍焊点上锡须的生长速度比锡-0.7 铜焊点慢,因此表明添加 0.05% 的镍能够抑制热循环过程中锡须的生长。此外,与 Cu6Sn5 IMC 界面层相比,Sn-0.7Cu-0.05Ni 焊点中 (Cu,Ni)6Sn5 IMC 界面层的六角形 η-Cu6Sn5 稳定化显著降低了热膨胀系数 (CTE),从而减少了 Sn0.7Cu0.05Ni 焊点上锡须生长的热失配应力。这项研究对通过一致的检测协议和遵守行业标准实践来减少锡须生长的有效方法具有重大意义。
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来源期刊
Journal of Materials Science: Materials in Electronics
Journal of Materials Science: Materials in Electronics 工程技术-材料科学:综合
CiteScore
5.00
自引率
7.10%
发文量
1931
审稿时长
2 months
期刊介绍: The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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