Properties of Cu/SAC0307 mixed solder balls/Cu joints with different Zn-particles content at low-temperature under ultrasonic assisted
Properties of Cu/SAC0307 mixed solder balls/Cu joints with different Zn-particles content at low-temperature under ultrasonic assisted
复制标题
DOI：
10.1108/ssmt-07-2022-0046
复制
发表时间：
2022-09
期刊：
影响因子：
--
通讯作者：
Gui-Sheng Gan;Shi-Qi Chen;Liujie Jiang;Cong Liu;Tian Huang;P. Ma;Dayong Cheng;Xin Liu
中科院分区：
文献类型：
--
作者：
Gui-Sheng Gan;Shi-Qi Chen;Liujie Jiang;Cong Liu;Tian Huang;P. Ma;Dayong Cheng;Xin Liu
目的研究不同锌颗粒含量的Cu/SAC0307混合焊料球/Cu接头在超声辅助下的低温性能。设计/方法/方法：采用1µm Zn粒子与粒径为25 ~ 38µm的Sn-0.3Ag-0.7 （SAC0307）混合填充接头，在超声辅助下低温成功实现Cu/Cu的微连接。结果表明：随着zn颗粒含量的不断增加，接头上下界面的金属间化合物（IMCs）逐渐由扇形Cu6Sn5转变为波浪形Cu5Zn8；随着zn颗粒含量的增加，接头上下界面的IMC厚度先减小后增大。随着锌颗粒含量的增加，节理的抗剪强度增大，当锌颗粒含量为40%时，节理的抗剪强度达到最大值29.76 MPa，比未添加锌颗粒时提高了62.6%。然而，随着锌颗粒含量的增加，接头的抗剪强度降低。另外，当锌含量增加到50%时，由于锌颗粒氧化程度的增加，接头主要在锌颗粒之间断裂。采用1µm Zn颗粒与粒径为25 ~ 38µm的Sn-0.3Ag-0.7 （SAC0307）混合，在180℃下填充Cu/Cu接头的新方法。
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.