Preparation of Water-Based No-Clean Flux for High Temperature Lead-Free Solder

Abstract:

A series of water-based no-clean fluxes composed of an anion/nonion binary surfactant were investigated. The wetting behavior of Sn0.7Cu and Sn3.0Ag0.5Cu on copper with different content of binary surfactant, and the performance of the flux were tested according to the Chinese industry standard of SJ/T 11273-2002 (No-clean liquid Flux). The results showed that the wettability of binary complex was better than that of single surfactant. Two promising fluxes for Sn0.7Cu and Sn3.0Ag0.5Cu solder were selected, respectively. The fluxes showed excellent performance such as halogen-free, less corrosivity, low content of volatile organic compound (less than 5%), high spread rate (over 80%), and high surface insulation resistance (beyond 10⁸Ω). The prepared fluxes meet the requirement of lead-free solder.

• Periodical: Advanced Materials Research (Volumes 314-316)
• Pages: 1112-1116
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.314-316.1112
• Online since: August 2011
• Authors: Zhi Feng Hao, Qing Qing Wu, Ming Sun, Jian Yu, Yi Peng Guo, Yao Rao
• Keywords: Complex Surfactant, Lead-Free Solder, Water-Based No-Clean Flux

References

[1] Z.Huang L.P. Zhang X.Q. Chen:Semiconductor Technology,Vol.31(2006),P.815,in chinese.

[2] G.Wable,Q.Chu,P.Damodaran:IEEE Transactions on electronics Packaging Manufacturing, Vol(29).2006 P.202.

[3] D.X.Xu,Y.Y. Lei Z.X. Xia: Electronic Components&Materials,Vol.24(2005),P.26, in chinese.

[4] G. Gao, J.D. Baker, K.M. Adams U.S. Patent 5,4431,660. (1995)

[5] D.X.Xu,D.B. Wang.F.Han:Electronic Components and Materials, Vol.29(2010),P.33, in chinese.