What are the factors that cause solder beads to appear in SMT solder paste soldering?

inSMTSolder pasteDuring the welding process, the tin bead phenomenon is one of the main defects. There are many reasons for the formation of tin beads, and they are not easy to control. Then it leads toSMTWhat are the factors that cause tin beads to appear during welding? Now, let's take a look at the introduction from Shenzhen JJY Solder Paste Manufacturer:

1InSMTDuring the production process, the solder paste used should have an appropriate squeezing force to ensure it is evenly distributed on the pads. Unstable squeezing force may lead to the formation of tin beads.

2The problem of solder beads is related to the design of the solder pads. The pad design should take into account an appropriate window opening to prevent solder paste from being squeezed out of the soldering area during the soldering process.

3The welding temperature is forSMTWelding is of vital importance. Both too high and too low temperatures can cause problems, including the formation of tin beads. Ensure that the welding temperature complies with the specifications recommended by the manufacturer.

4Low-quality solder paste may contain impurities or inappropriate particles or excessive oxidation, leading to the formation of solder beads. Choose high-quality solder paste and ensure it is suitable for specific applications.

5Contaminants on the solder pads, such as grease, dust or chemicals, may cause the formation of solder beads. Maintaining a good working environment and equipment can reduce the risk of pollution.

6Excessive squeezing may cause the solder paste to be squeezed out of the pad area, forming solder beads. Make sure the squeezing force is moderate, neither too strong nor too weak.

As a 16-year-old veteran solder paste manufacturer, JJY has been dedicated to the research and development as well as production of solder paste for many years. The solder paste we produce is of stable quality, without solder connection, false soldering or monument erection. No residue, Wuxi beads, bright and full solder joints, firm solder joints, and excellent electrical conductivity. If you have any needs, please feel free to contact us.