A solder paste manufacturer briefly discusses how to test if a solder paste is good to use?

At present, in ChinaSolder pasteThe number of brands is constantly increasing, but the quality of products varies greatly. Since some companies have fixed suppliers, but for some new companies, this is for some old onesSMTLEDThe influence of the company is not significant. These new companies can only choose solder paste based on the reputation of some old companies. However, for different processes and different products, there are also some differences in the solder paste they use,Let's have a chat with the solder paste manufacturer below:

At this point, I believe many people will have a lot of feelings. I once encountered a company like this. In the few months since its establishment, it has changed many types of solder paste and various problems have emerged. At first, it was mistakenly thought that the supplier's solder paste was a product issue. But after a series of solder paste changes, it was found that different process technologies use different solder pastes.

We all know whether there is a suitable product for this solder paste. The most effective way is to test it. Only by passing can we see what kind of solder paste is more suitable. At the same time, we can also find out if there are any problems in our own technical application during the testing process. In this way, we can test this solder paste from multiple aspects when using it.

First, after printing, conduct an actual test. If the solder paste printing suddenly shows five defects: bridging, skin layer formation, insufficient adhesion, collapse, and blurring, apart from the inherent operational issues, all of these can be detected in terms of the solder paste itself:

1Bridging, collapse, blurring, the proportion of metal components in the solder paste is uneven; Insufficient viscosity and large tin powder particles.

2If the flux in the solder paste is too active and there is lead in the solder paste, the possibility of lead content is high.

3Insufficient adhesion is likely due to the fact that the solvent in the solder paste is prone to dissipation, the proportion of metals in the solder paste is relatively high, and the particle size may also be inconsistent.

Second, after welding, check the appearance and find no functional defects. The malfunction is mainly due to process or operational issues. Generally speaking, due to the sudden deterioration of solder paste, the appearance mainly depends on whether there are residues after soldering. Are there any tin beads on the surface? Will it corrode the board surface?

The solder paste of Shenzhen JJY brand has gone through many years12A solder paste and wire manufacturer specializing in the annual research and development of solder paste, solder wire, solder wire, lead-free solder paste, leaded solder paste, solder rods, leaded solder paste, etc.