What are the common defects in SMT solder paste processing?

NowadaysSMTSolder pasteThe welding requirements for processing are relatively high, and the precision requirements are also high. A slight mistake may lead to defects such as poor processing. To provide customers with high-quality electronic processing services, it is necessary to operate strictly in accordance with the processing requirements. Below, Shenzhen JJY Solder Paste Manufacturer will share some informationSMTCommon defects in processing:

I. Tin Beads:

1The silk-screen printing holes are not aligned with the solder pads, resulting in inaccurate printing.

2If solder paste is exposed to the air for a long time, it may be oxidized and absorb excessive moisture.

3The heating is too slow.

4It heats up too quickly.

5The solder paste dries too fast.

6The activity of the flux is insufficient.

7Too much tin powder with small particles.

8The volatility of the flux during the reflow soldering process is inappropriate.

Ii. Xiqiao:

In realitySMTIn surface mount technology (SMT) processing, the main causes of solder Bridges are mostly due to the solder paste being too thin, including low metal or solid content and low solubility in the solder paste, as well as overly large solder paste particles and too small surface tension of the flux.

Iii. Clearing the Way:

1,SMTThe amount of solder paste used for the surface mount is insufficient.

2The coplanarity of the component pins is insufficient.

If the moisture content of the solder paste is insufficient or the solder paste is too thin, it is easy to cause solder loss.

4The pins are soldered or there are connection holes nearby.

JJY Solder Paste Factory produces a wide range of solder paste products, including lead-free solder paste, halogen-free solder paste, silver-containing lead solder paste, syringe solder paste, nickel-plated environmentally friendly solder wire, solder bar, etc. We can provide technical support. If you have any needs or technical questions regarding soldering, please feel free to leave a message online to interact with us!