J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (2): 156-162.

• Regular Papers • Previous Articles     Next Articles

Wetting Behaviors and Interfacial Reaction between Sn-10Sb-5Cu High Temperature Lead-free Solder and Cu Substrate

Qiulian Zeng1,2), Jianjun Guo1), Xiaolong Gu1), Xinbing Zhao2), Xiaogang Liu1)   

  1. 1) Zhejiang Province Key laboratory of Soldering & Brazing Materials and Technology, Zhejiang Metallurgical Research Institute, Hangzhou 310011, China
    2) Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2008-10-27 Revised:2009-01-15 Online:2010-02-28 Published:2010-02-28
  • Contact: Jianjun Guo
  • Supported by:

    the Science and Technology Program of Zhejiang Province, China (No. 2008F1024)

Abstract:

Sn-10Sb-5Cu lead-free solder was fabricated for high temperature application in electronic package. Wetting behaviors and interfacial reaction between such a high temperature lead-free solder and Cu substrate were investigated and compared with those of 95Pb-Sn solder. The results showed that the wetting properties of Sn-10Sb-5Cu solder are superior to those of 95Pb-Sn solder in maximum wetting force, wetting time and wetting angle in the temperature range of 340{400°C. However, the surface of the Sn-10Sb-5Cu solder sample after wetting balance tests was rougher than that of 95Pb-Sn solder at the temperature lower than 360°C. In static liquid-state interfacial reaction, the types and thickness of the intermetallic compounds (IMCs) of both solders were different from each other. The wetting kinetics in the Sn-10Sb-5Cu/Cu system was more rapid than that in 95Pb-Sn /Cu system, and the higher formation rate of IMCs in the former system was considered as the reason.

Key words: Wetting, Interfacial reaction, High temperature lead-free solder, Sn-10Sb-5Cu solder