کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1609476 | 1516256 | 2015 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Quasi-transient liquid-phase bonding by eutectic reaction of Sn-plated Zn on Cu substrate for high-temperature die attachment Quasi-transient liquid-phase bonding by eutectic reaction of Sn-plated Zn on Cu substrate for high-temperature die attachment](/preview/png/1609476.png)
• We demonstrate a novel Pb-free die-attachment structure using Sn-plated Zn solder.
• The bonded microstructure can be controlled by the process time.
• The current bonding structure shows high bonding strength above 30 MP.
• The fracture of current bonding system occurred in the β-Sn matrix soldered layer.
• The β-Sn phase in the fracture layer can be expected to reduce the brittleness of Zn.
A novel die-attachment method is demonstrated through quasi-transient liquid-phase bonding using Sn-plated Zn sheets. The bonding temperature can be decreased to 250 °C, which is ∼100 °C lower than that for typical Zn–Sn high-temperature solders. The bonded interface consists of primary α-Zn and Sn–Zn eutectic phases, and the microstructure can be controlled according to the diffusion velocities of metals. The high die-shear strength exceeding 30 MPa from the controlled microstructure is superior to typical Pb–5Sn solders strength around 20 MPa.
Journal: Journal of Alloys and Compounds - Volume 637, 15 July 2015, Pages 143–148