2023-02-09 18:40:11
In SMT processing, solder paste is an important raw material in production. The selection of solder paste is very important, which is directly related to the quality of final products. So, what are the requirements for solder paste in SMT processing?
1. Long storage life is required. The solder paste can be stored for 3 to 6 months at 0 ~ 10 ℃, and there should be no chemical change during storage, and the phenomenon of separation of solder powder and flux should not occur, and the viscosity and adhesion of solder paste need to remain unchanged.
2. Good wetting performance is required. In SMT processing, the active agent and wetting agent components in the flux should be selected correctly, so as to better meet the wetting performance requirements.
3. Long working life is required. Solder paste has been used for a long time in SMT processing, so the solder paste should be able to be placed at room temperature for 12 to 24 hours and the performance should remain unchanged, and the shape and size should also remain unchanged.
4. Good welding strength is required. After the welding is completed, it can be ensured that the components will not fall off due to vibration and other factors.
5. The residue after solder paste soldering needs to have good stability, non corrosive, have high insulation resistance, and be easy to clean.
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