【 JJY 】 How to deal with poor SMT patch soldering?

inSMTIn the electronic processing of surface mount technology (SMT) processing plants, sometimes soldering defects such as false soldering and cold soldering may occur, leading toSMTPoor surface mount soldering. How should these problems be dealt with? The following is a brief introduction provided by Shenzhen JJY Solder Paste Manufacturer for everyone:

I. False welding

1Cause of occurrence:

SMTPoor solderability of surface mount components and pads, reflow soldering temperature or heating rate not meeting processing requirements, incorrect printing parameters, excessive post-printing dwell time, and reduced solder paste activity, etc.

2Solution:

StrengthenPCBScreening of circuit boards and surface mount components to ensure good soldering performance; Adjust the reflow soldering temperature curve; Change the pressure and speed of the scraper to ensure a good printing effect; After the solder paste is printed, surface mount reflow soldering should be carried out as soon as possible.

Ii. Cold welding

1Cause of occurrence:

In actual electronic processing, the cold soldering we often refer to is generally a situation where the surface of the solder joint is dark and rough, and it has not completely melted with the object to be soldered. In actual production and processing,SMTThe main causes of cold soldering in surface mount technology (SMT) processing are inappropriate heating temperature, solder deterioration, excessive preheating time or high temperature, etc.

2Solution:

According to the reflux temperature curve provided by the supplier, adjust the curve and then make the adjustment based on the actual situation of the produced products. Change the solder paste. Check whether the equipment is normal and correct the preheating conditions.

JJY, as a sixteen-year-old brandSolder pasteThe manufacturer has been committed to the research and development, production and sales of solder paste. Our product quality is stable, with no solder connection, no false soldering, and no monument erection. Residual Wuxi beads, bright and full solder joints, firm welding, and excellent electrical conductivity. If you have any needs, please feel free to contact us.