Causes of defective solder paste on circuit boards
Data:
2023-12-08
When the circuit board is producing patches, there will be solder paste that cannot be applied well. Generally, the poor solder paste application is related to the cleanliness of the PCB bare board surface. If there is no dirt, there will basically be no soldering defects; secondly, The solder paste itself has poor flux, temperature, etc. So what are the specific aspects of common soldering defects in circuit board production and processing? How to solve this problem after it occurs?
①There are particle impurities in the coating on the board surface, or there are polishing particles left on the circuit surface during the manufacturing process of the substrate.
②There are grease, impurities and other impurities on the board surface, or there may be silicone oil residue.
③The pad surface is oxidized and the copper surface is darkened seriously.
④Sufficient temperature or time was not ensured during the soldering process, or flux was not used correctly.
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