Influence of copper nanowires on properties and microstructure of low-Ag Sn-1Ag-0.5Cu solders

Li, Zhi-Hao; Zhang, Liang; Gao, Lili; Long, Weimin; Zhong, Shengwen; Zhang, Lei

doi:10.1007/s10854-022-07941-3

Cited by 9 publications

(1 citation statement)

References 24 publications

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“…However, as the Ag content decreases, low-Ag SAC solders exhibit problems such as an increased melting range (217°C-221°C), decreased solderability and reduced mechanical properties (Gumaan, 2020;Sona and Prabhu, 2015;Yan et al, 2016;Shnawah et al, 2012). Many studies have been performed to solve these problems (El-Daly et al, 2014;El-Daly et al, 2015;Chen et al, 2015;Lei et al, 2016). However, these studies had little effect in improving the solder performance, solderability and the melting temperature (Jing et al, 2017;Ma et al, 2017; The current issue and full text archive of this journal is available on Emerald Insight at: https://www.emerald.com/insight/0954-0911.htm Zhao et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Properties of Cu/SAC0307 mixed solder balls/Cu joints with different Zn-particles content at low-temperature under ultrasonic assisted

Gan

Chen

Jiang

et al. 2022

SSMT

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Purpose This study aims to research properties of Cu/SAC0307 mixed solder balls/Cu joints with different Zn-particles content at low-temperature under ultrasonic assisted. Design/methodology/approach A new method that 1µm Zn particles and Sn-0.3Ag-0.7 (SAC0307) with a particle size of 25–38 µm were mixed to fill the joint and successfully achieved micro-joining of Cu/Cu under ultrasonic-assisted at low temperature. Findings The results showed that with a continuous increase in the Zn-particle content, the interfacial intermetallic compounds (IMCs) of the upper and lower interfaces of joints gradually changed from scallop-shaped Cu6Sn5 to wavy-shaped Cu5Zn8. Moreover, the IMC thickness of the upper/lower interface of joints first decreased and then increased with increasing Zn-particle content. The shear strengths of joints increased with Zn-particle content, the shear strength of joints went to a maximum of 29.76 MPa when the Zn-particle content was 40%, an increase of 62.6% compared to joints without Zn particles. However, as the Zn-particle content continued to increase, the shear strengths of the joints decreased. Additionally, when the Zn content increased to 50%, because the oxidation degree of Zn particles increased, the joints were mainly broken among Zn particles. Originality/value A new method that 1µm Zn particles and Sn-0.3Ag-0.7 (SAC0307) with a particle size of 25–38 µm were mixed to fill the Cu/Cu joint at 180°C.

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