Various Soldering Defects In SMT PCB Production | SunzonTech

Good soldering is the prerequisite to ensure stable and long-lasting operation of the circuit. Common soldering defects are listed below. How many kinds you have meet?

1. Solder Ball - Soldering Defect | SunzonTech

2. Disturbed soldering: Solder moves as the solder joint cools, causing fogging, crystallization, roughness on the soldering surface. - Soldering Defect | SunzonTech

3 Monument - Soldering Defect | SunzonTech

4. Cold junction: the soldering tin starts to cool without fully melting, and the welding surface is uneven - Soldering Defect | SunzonTech

5. Bridging - Soldering Defect | SunzonTech

6. Overheating: due to the overheating of solder, the solder slips along the weld, and the remaining solder is not enough to weld the pins firmly - Soldering Defect | SunzonTech

7. Coplanar - Soldering Defect | SunzonTech

8. Insufficient flux: insufficient wetting between solder and pad - Soldering Defect | SunzonTech

9. Pinhole, blowhole, crack - Soldering Defect | SunzonTech

10. Too much or too less solder: too little solder reduces the welding strength; If there is too much, it is easy to make the solder bottom not well wetted - Soldering Defect | SunzonTech

11. Deviation - Soldering Defect | SunzonTech

12. Pin is not trimmed: it is easy to cause short circuit between welding wires - Soldering Defect | SunzonTech

13. Solder pad falling off: easy to cause short circuit - Soldering Defect | SunzonTech

14. Solder scattered everywhere: it is easy to cause circuit short circuit, and it needs to be cleaned to remove these scattered solder - Soldering Defect | SunzonTech

Don't worry about the following problems. It still needs to take some time to solve them. As long as you are patient, most of the above soldering defects can be repaired. If the soldering tin is not obedient, you can:

Stop heating and calm down the pad and your mood at the same time;

Clean and tin your soldering head;

Clean the flux near the pad;

Take the soldering iron again to heat the pads and pins;

After several attempts, the previous soldering defect problems can be solved.