What types of solder paste and flux are there in smt patch assembly?

insmtIn surface mount technology (SMT) processing, the flux in solder paste is indispensable. An appropriate flux can not only remove oxides and prevent the metal surface from re-oxidizing, but also improve solderability and promote energy transfer to the soldering area. Choosing high-quality fluxes is the secret to JJY building a reliable brand. Below, JJY solder Paste Manufacturer introduces three common fluxes to you:

1Rosin type flux

Rosin flux is the most common flux. Its soldering flux performance is relatively weak, and its corrosiveness is small. The residue is basically non-corrosive and remains on the substrate to form a protective film. However, sometimes it is sticky and hygroscopic, and is generally not cleaned.

2Water-soluble flux

Water-soluble flux, as the name suggests, has a high solubility in water, strong activity and good soldering performance. The residue after soldering can be washed away with water. Water-soluble flux has strong deoxidation ability, excellent soldering performance, stable storage and is non-toxic. The residue after welding is easily soluble in water and causes no pollution to the environment. After cleaningpcbIt meets the cleanliness requirements, is non-corrosive and does not reduce the electrical insulation performance.

3No-cleaning flux;

No-cleaning flux refers to the flux that contains only trace amounts of harmless flux residues after welding and does not require cleaning after welding. It is not only non-toxic, odorless and produces little smoke, but also does not pollute the environment and has good weldability. Due to the minimal residue after welding, it is guaranteedpcbThe panel is dry and non-sticky, and can also be tested online. Moreover, the storage period of no-clean flux can be up to one year at most.

Shenzhen JJY Industrial Technology Co., Ltd. is located in Longhua, Shenzhen. It mainly produces and operates lead-free solder paste, lead-free high-temperature solder paste, lead-free medium-temperature solder paste, lead-free low-temperature solder paste, etc. If you have any needs, please feel free to contact us.