Sharpening refers to the sharp corner bulge of solder on the solder joint of copper foil circuit terminal of circuit board, with obvious tip. This situation is called solder point sharpening.
What are the factors causing solder joint sharpening?
1. During manual welding, the soldering iron head on the operator's hand may be removed prematurely when the solder is not completely melted and fixed.
2. It is caused by too low temperature during welding. However, most of the reasons are that the flame iron head is removed too late, the welding time is too long, and the flux is vaporized, that is to say, the sharpening is related to temperature and operation.
What are the effects of solder joint sharpening on the circuit board?
In addition to the poor appearance of the solder joints on the circuit board, when the solder joint tip exceeds the allowable length, the insulation distance between the solder joints is reduced, which is easy to cause bridging. It will cause ignition in high-frequency and high-voltage circuits, so we should pay special attention to it.
Solution: the welding time should not be too long. In case of sharpening, just add flux for re welding. In automatic welding, pay attention to the angle of printed circuit board from solder liquid level.
Various problems in welding may affect the processing quality of PCBA, and electronic processing plants need to pay special attention. BQC electronics is a company specializing in providing electronic manufacturing services such as PCBA OEM, SMT patch processing, dip plug-in welding and so on.
