What causes the viscosity of lead-free solder paste to be insufficient?

PCBWhen using lead-free solder paste for plate soldering, the problem of poor viscosity of the solder paste may occasionally be encountered. What causes the viscosity of lead-free solder paste to be not good enough? Let's have a brief discussion with the solder paste manufacturer:

The viscosity of lead-free solder paste is not good enough. Most of them usually have it3One situation:

1The degree of wetting of the solder paste

If lead-free solder paste is too dry, its viscosity will also decrease, just like staple food rice. When rice is moist, it has viscosity, but whenever it dries, its viscosity disappears. If the solder paste is too thin, that is, it contains too much moisture, its viscosity will also decrease accordingly.

2The temperature at which solder paste passes through the furnace

After the lead-free solder paste is applied to the panel, it needs to be passed through the furnace to achieve a fixing effect. Moreover, during the entire process of passing through the furnace, if the furnace temperature is too high, it may also cause the solder paste to dry out and reduce its viscosity.

3The quality issue of the solder paste itself

If both of the above situations are ruled out, then it is necessary to consider whether it could be due to the raw materials of the solder paste. If the quality of the viscosity agent in the solder paste is poor, it may indeed lead to a difference in the viscosity of the solder paste.

The above is aboutLead-free solder pasteSome issues regarding viscosity finishing might not be fully covered. We welcome everyone to discuss them together. For more knowledge about lead-free solder paste, please continue to follow the online message of JJY Solder Paste Manufacturer or interact together.