What is Cold Solder Joint and How to Avoid It
Identifying distributed cold solder joints involves visually inspecting the entire circuit board. These joints may exhibit a dull and grainy appearance, characterized by weakened
What does a cold-joint interface look like
Home / What does a cold-joint interface look like
Note: Lead-free solders (SAC305) are naturally duller, so graininess alone is not always a defect, but a "dry" look is. Technically, a cold solder joint occurs when the solder does not melt completely or the surface being soldered has not reached the liquidus temperature of the alloy. While these joints may look acceptable at first glance, they can become problematic over time, especially when exposed to vibration, thermal. A cold solder joint happens when there is improper bonding between a solder and a solder-surface interface because of either incomplete melting or lack of fusion of the solder.
