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Use method and precautions of solder paste

Views : 125
Update time : 2022-08-12 17:19:19
For many newly established SMT beginners or production line managers, the straight through rate of SMT production line is the top priority, 60%-70% of the defective rate is generated in the welding process. Most of the reasons are related to the improper use and storage of solder paste, how to store and use, and what problems should be paid attention to in the process of use. Analyze the problems and hope to help electronic foundry or SMT chip processing department to better understand the use of solder paste.
1. How to store the tin paste
The paste should be sealed and stored in the refrigerator at 2-10 degrees Celsius. Xinfu Jinxi paste is generally valid for 3-6 months. Use the queuing mechanism, using the first in first out principle.
How to use solder paste
1. The regeneration
After the solder paste is removed from the refrigerator, condensation will occur immediately on the surface of the solder paste bottle due to the low storage temperature, and the water vapor in the air will also condense. Do not open the cap immediately after taking it out of the tin can. The paste must be placed at room temperature for 2-4 hours to return the temperature to the natural ambient temperature (25±3C). It is strictly prohibited to use external heating device to reheat the solder paste quickly.
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