Back to Search
Start Over
Properties of Cu/SAC0307 mixed solder balls/Cu joints with different Zn-particles content at low-temperature under ultrasonic assisted.
- Source :
- Soldering & Surface Mount Technology; 2023, Vol. 35 Issue 3, p143-154, 12p
- Publication Year :
- 2023
-
Abstract
- 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 Cu<subscript>6</subscript>Sn<subscript>5</subscript> to wavy-shaped Cu<subscript>5</subscript>Zn<subscript>8</subscript>. 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09540911
- Volume :
- 35
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Soldering & Surface Mount Technology
- Publication Type :
- Academic Journal
- Accession number :
- 163211944
- Full Text :
- https://doi.org/10.1108/SSMT-07-2022-0046