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Interface reaction and intermetallic compound growth behavior of Sn-Ag-Cu lead-free solder joints on different substrates in electronic packaging

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Abstract

During soldering and service, intermetallic compounds (IMCs) have an important impact on the performance and reliability of electronic products. A thin and continuous intermetallic layer facilitates the formation of reliable solder joints and improves the creep and fatigue resistance of solder joints. However, if the IMCs overgrow, the coarse IMC becomes brittle and tends to crack under stress, leading to a decrease in solder joint reliability. Based on the latest developments in the field of lead-free solders at home and abroad, this paper comprehensively reviews the interfacial reaction between SnAgCu Pb-free solders and different substrates and the growth behavior of IMCs and clarifies the growth mechanism of interfacial IMCs. The effects of the modification measures of lead-free solder on the IMCs and reliability of SnAgCu/substrate interface are analyzed, which provide a theoretical basis for the development and application of new lead-free solder.

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Figure 1

Adapted from Ref. [18] with permission from Elsevier

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Acknowledgements

This study was funded by the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18-2149), the Natural Science Foundation of China (51475220), State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology (AWJ-19Z04), the Qing Lan Project, the China Postdoctoral Science Foundation funded project (2016M591464), Six talent peaks project in Jiangsu Province (XCL-022).

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  1. School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China

    Ming-yue Xiong & Liang Zhang

  2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China

    Liang Zhang

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  1. Ming-yue Xiong
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  2. Liang Zhang
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Correspondence to Liang Zhang.

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Xiong, My., Zhang, L. Interface reaction and intermetallic compound growth behavior of Sn-Ag-Cu lead-free solder joints on different substrates in electronic packaging. J Mater Sci 54, 1741–1768 (2019). https://doi.org/10.1007/s10853-018-2907-y

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  • DOI: https://doi.org/10.1007/s10853-018-2907-y

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