What are the specific requirements when choosing flux paste?

Tin powder andFlux pasteIt is two important components of solder paste, and flux issmtIndispensable in surface mount technology (SMT) processing. The right flux can not only remove oxides and prevent the metal surface from re-oxidizing, but also improve solderability and promote energy transfer to the welding area. Now, let's have JJY Solder Paste Manufacturer sort out for you what specific requirements there are when choosing solder paste?

SMTThe specific requirements for solder paste in surface mount technology are as follows:

1Due to its special composition, rosin is280℃It will be heated and decomposed, so the solder paste is required to have good thermal stability, and the general thermal stability temperature should not be lower than100℃.

2The density of solder paste should meet the requirements. Generally speaking, it is required to be less than the density of liquid solder so that the solder paste can be better spread evenly on the solder, effectively isolate air oxides, and better exert its soldering effect, thereby improvingPCBAProduct quality.

3The active temperature range of the solder paste should be appropriate. Control it to start acting before the solder melts, so that the surface tension of the solder can be better reduced during the actual welding.

Shenzhen JJY Industrial Technology Co., Ltd. is located in Longhua, Shenzhen. Its main production and operation include:LEDType solder paste, leaded solder paste, lead-free solder paste. If you have any needs, please feel free to contact us.