Preventing Common Lead-Free Soldering Defects
Bridging, insufficient wetting, solder balls, tombstoning, voids, and head-in-pillow defects often arise from interacting design, material, printing, placement, and thermal factors.
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Bridging, insufficient wetting, solder balls, tombstoning, voids, and head-in-pillow defects often arise from interacting design, material, printing, placement, and thermal factors.
Learn more →A reflow profile should activate flux, limit thermal shock, create complete wetting, and avoid excessive intermetallic growth. Preheat, soak, time above liquidus, peak temperature, and cooling rate all matter.
Learn more →SAC alloys are widely used, while low-silver, bismuth-containing, tin-copper, and specialty alloys address cost or temperature needs. Selection should consider reliability, melting range, finish compatibility, and rework.
Learn more →Lead-free assembly uses higher process temperatures and different alloy behavior than traditional tin-lead soldering. Materials, component ratings, finishes, fluxes, and process limits must be reviewed as a complete system.
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