Why is it necessary to warm up the solder paste before surface mount soldering?

With the development of society, solder paste, as an auxiliary soldering material, has become an indispensable part of many industries. Therefore, it is becoming increasingly popular in society. So, do you know why it is necessary to warm up before general surface mount soldering? Have you ever learned about this? The solder paste manufacturer will explain it to you below:

Solder pasteOne necessary step before use is to warm up. The so-called warming up is also called thawing, which is natural thawing rather than artificial heating for thawing. This point needs to be particularly noted. The warming of solder paste can make the flux and solder powder evenly distributed, thereby fully exerting the various characteristics of the solder paste. The method to warm up the solder paste is to take it out of the refrigerator and place it at the standard room temperature22-28℃The interior is warmed up and thawed in accordance with the standard500gThe solder paste in the container should be warmed up at least2For more than one hour, until the temperature of the solder paste is the same as the ambient temperature. Do not open the sealed can lid if the warming time is insufficient. If it is forced to be opened, the water vapor in the air will condense due to the temperature difference and enter the solder paste, which will cause the performance of the solder paste to deteriorate, the soldering to be poor, and the longer it is opened, the faster the solder paste will dry.

The characteristic atomic substances in general solder paste are all at low temperatures, with extremely low activity, and they will also react with water vapor to form water-based attachments. If used directly at this time, it will not only affect the process progress but also waste the product. Therefore, the solder paste needs to be warmed up and placed directly at room temperature3-4Let it thaw naturally for about an hour. Note that heating should not be used to shorten the warming time, nor should the bottle cap be opened before the warming is completed. After the warming is completed, stir the solder paste thoroughly and then put it into use.

That's all for today's introduction. You can take a look. I hope it will be helpful. If you still have any questions, feel free to consult me at any time!