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Here you can find knowledge about Tin-Bismuth Alloy, including but not limited to usage methods, installation techniques, troubleshooting and more. Focused on SMT soldering processes. If you can't find what you need, please contact us anytime.
Solder paste is accelerating its replacement of traditional leaded/lead-free systems in low-temperature soldering scenarios. Among them, Sn-Bi solder paste has become the preferred choice for flexible circuits, temperature-sensitive devices, and mixed assembly of dissimilar materials due to its 138°C eutectic point. However, its inherent brittleness and insufficient thermal fatigue resistance lead to frequent solder joint cracking, especially under the combined stress of temperature cycling and mechanical vibration, where its reliability shortcomings become prominent. Engineers need to simultaneously evaluate the device package type, PCB copper thickness distribution, and matching degree of reflow profile slope during selection.
Published: 2020-12-08Based on measured production line data, this paper compares the differences among SAC305 solder paste, SAC0307 solder paste, and low-temperature tin-bismuth solder paste in terms of printability, reflow performance, and solder joint reliability. It highlights the wetting advantages of SAC solder paste in the high-temperature zone and the irreplaceability of tin-bismuth solder paste in soldering temperature-sensitive components, providing reproducible criteria for process selection.
Published: 2010-01-22Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.