Many customers have receivedSolder pasteWhen it comes to this, the solder paste manufacturer will remind everyone that after receiving the solder paste, it needs to be stored in the refrigerator. Before use, it should be taken out in advance, and before processing, it should be cooled and stirred evenly. So, why is the solder paste hereSMTIs it necessary to warm up and stir before surface mount technology (SMT) processing? Next, JJY solder Paste Manufacturer will analyze it for everyone:

SMTThe solder paste used is mainly stored in the freezer for cold storage. The main purpose is to slow down the reaction speed between the flux and the solder powder. Why does solder paste need to be warmed up and stirred? Before soldering solder paste, it needs to be taken out of the refrigerator in advance to warm up. It is generally recommended that everyone automatically warm up at room temperature and not use other heating methods to defrost. When unwarmed solder paste is in use, it is prone to condensing water vapor in the air and adhering to the solder paste. During the reflow soldering process, the moisture will rapidly vaporize due to heat, resulting in solder explosion and eventually forming solder beads. The purpose of warming up solder paste is to fully restore its original viscosity and activity.

As for why solder paste needs to be stirred? Solder paste contains flux and various metal components. Since the density of each substance is different, during storage, the metal components with higher density may sink. The purpose of stirring the solder paste is to evenly mix the tin powder and flux and other substances inside, thereby increasing fluidity and plasticity to ensure the uniformity and consistency of the solder paste. The methods of solder paste stirring are divided into manual stirring and machine stirring. Generally, it is recommended to stir it clockwise by hand2to4Minutes, and the machine stirs1to2The stirring time of the solder paste should not be too long. If it is too long, it may cause the solder paste to be higher than the operating temperature, resulting in a low viscosity during printing and possibly affecting the tinning performance.

The above is the analysis provided by JJY Solder Paste Manufacturer for everyoneSMTWhy does solder paste need to be warmed up and stirred before surface mount technology (SMT) processing? Only after warming up and stirring evenly can the performance stability and consistency of the solder paste be ensured, and the soldering effect will be more reliable. Solder paste isSMTOne of the most important auxiliary materials in a patch is also an influential oneSMTAn important factor in the welding quality of surface mount technology (SMT) processing. If you want to know more about solder paste, welcome to continue to follow JJY or call for consultation and information!