Sn-Bi and Sn-In are the most common lead-free low temperature alloys typically used in electronic assemblies. Solution of Bi Bi in Sn plays an important role on crystal structure. The lattice parameters of Sn in Sn-Bi. Low temperature solders based on the Sn-Bi system have caught the attention of the electronics manufacturing industry as they make possible electronics assembly at lower temperatures, bringing technical, economic, and environmental benefits. The alloys in this category are required to reflow between 170 and 200oC soldering temperatures. Lower soldering temperatures result in lower thermal stresses and defects, such as. Solders enables elimination of Wave Soldering process, reduces exposure to thermal excursion, thereby increasing Long Term Reliability Significant reduction in Reflow Cycle time.
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