The main causes of tin cracks in solder joints are technological problems during processing and physical collision problems. If the temperature curve is set unreasonably during the welding process, such as sudden temperature rise or too fast or too slow temperature drop, the temperature difference will The problem leads to cracking of solder joints.
In addition, problems such as vibration or collision of the conveyor belt during processing will also cause solder joints to crack, because the solder joints will be relatively fragile when the welding is not completely solidified. If the vibration is too large or there is a collision during transmission, it will be easy lead to solder joint cracking. In addition, BQC believes that if the solder paste is contaminated by lead or other metals during processing, it will also lead to solder joint cracking.
