A Low Temperature Halogen-free, Low Content Of Solid Lead-free Solder In Flux

The green initiative, sustainable development is the social development strategy. With the development of human society, the environmental protection consciousness constantly strengthened, the human beings pay more attention on the healthy development of the environment.The damage of Pb gives birth to the lead-free solders.As electronic components become smaller and smaller, they can’t take the temperature of the marketization of the lead-free solder products having been set. How to reduce the electronics industry production cost, use the cheap components, the key is to develop low temperature lead-free solders and flux which is suitable with it.This essay, taking Sn-57Bi for solders, this paper studies what need to consider when you choose the every composition of flux, and the writer share her experience.Through orthogonal experiments and curve analysis softwares, gradually determine the final flux composition.In this paper the development of flux makes the help of welding appearance light, spreading rate is high, the content of solid low, non-halogen. All the indexes accord with national electronic industry standard.