The reasons for insufficient tin in reflow soldering

Reflow soldering with insufficient tin refers to the phenomenon of gaps or omissions in the soldering process due to certain reasons that the solder joints are not completely covered. This phenomenon may cause electronic devices to malfunction and affect their normal operation.

Reasons for insufficient tin in reflow soldering:

1. Welding temperature too high: Excessive welding temperature may cause insufficient melting of tin balls, leading to the occurrence of insufficient tin.

2. Short soldering time: If the soldering time is too short, it can cause the solder balls to not completely melt, resulting in a shortage of tin.

3. Poor quality of solder balls: Poor quality solder balls may result in incomplete coverage of solder joints, leading to insufficient solder.

4. Improper equipment adjustment: If the equipment is not adjusted properly, such as incorrect welding head position or angle, it may lead to insufficient tin.

5. Excessive welding pressure: Excessive welding pressure may cause deformation of the solder ball, thereby affecting the quality and coverage of the solder joint, leading to the occurrence of insufficient tin.

Countermeasures for insufficient tin in reflow soldering:

1. Control welding temperature and time: During the welding process, it is necessary to strictly control the welding temperature and time to avoid the occurrence of insufficient tin due to excessive temperature or time.

2. Choose high-quality tin balls: Using high-quality tin balls can reduce the occurrence of low tin.

3. Check if the equipment adjustment is correct: When using reflow soldering equipment, it is necessary to regularly check if the equipment adjustment is correct, such as the position and angle of the welding head.

4. Control the pressure during the welding process: During the welding process, maintain appropriate pressure to avoid excessive pressure causing deformation of the solder balls.

Using professional welding equipment: Using professional welding equipment can better control the welding temperature and time, thereby reducing the occurrence of insufficient tin.