What causes poor adhesion of lead-free solder paste? JJY, a solder paste manufacturer, provides you with the answer

Many people in the electronics factory are respondingLead-free solder pasteWhen soldering, the viscosity is not very good. What causes this? Generally speaking, there are three changes during the printing process: viscosity increases, viscosity decreases, and viscosity first decreases then increases and remains stable. Now, the solder paste manufacturer's editor can answer this situation for everyone:

Lead-free solder paste has poor adhesion, and generally has the following3One reason:

1The temperature at which solder paste passes through the furnace

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

2The degree of wetting of the solder paste

If lead-free solder paste is too dry, its stickiness will also decrease. Just like the rice we often eat, when the rice is moist, it has stickiness, but when it dries, its stickiness disappears. If the solder paste is too thin, that is, it contains too much moisture, its viscosity will also decrease accordingly.

3The quality issue of the solder paste itself

Having ruled out both of the above reasons, we should then consider whether it is a problem with the raw materials of the solder paste. If the quality of the adhesive in the solder paste is poor, it will inevitably lead to poor adhesion of the solder paste.

As mentioned above, these are all possible problems of poor adhesion that may occur during the welding process. Through the above explanations, everyone should be able to identify the causes and solutions when such situations occur during welding at work. Therefore, here I would like to tell everyone that first of all, it is necessary to clearly know whether your product is an ordinary electronic component or a dense electronic component. If it's ordinary, then choose some commonly used ones3Powder and solder paste will do, such as6337Solder paste If it is dense, then solder paste with stronger activity should be selected. The activity of solder paste is determined by its particle size; the larger the particle size, the stronger the activity.

If you need to purchase solder paste, you can consult the customer service staff. They will recommend high-quality, reasonably priced and cost-effective solder paste products for you. Good quality and excellent service are our advantages! Welcome new and old customers to call for consultation and purchase!