What are the reasons for the insufficient solder filling in smt patch processing?

Solder pasteShangxi issmtOne of the crucial steps in surface mount technology (SMT) processing is related to the performance and aesthetic appearance of the circuit board. During actual production and processing, poor soldering may occur due to certain reasons, such as insufficient soldering on ordinary solder joints, which will directly affect the performancesmtThe quality of surface mount technology (SMT) processing. SosmtWhat are the reasons for the incomplete solder coating in surface mount technology (SMT) processing? Now, JJY solder Paste Manufacturer will introduce it to you:

smtThe main reasons for insufficient solder coating on the solder joints in surface mount technology (SMT) processing:

1,PCBSolder pad orSMDThere is a serious oxidation phenomenon at the welding position.

2The activity of the flux in the solder paste is insufficient.PCBSolder pad orSMDThe oxides at the welding position cannot be completely removed.

3The temperature in the reflow soldering area is too low;

4The wetting performance of the flux in the solder paste is not good;

5If there are some solder joints where the solder is not fully coated, it might be that the solder paste was not thoroughly stirred before use, and the flux and solder powder were not fully mixed;

6The amount of solder paste at the solder joint is insufficient;

7During reflow soldering, if the preheating time is too long or the preheating temperature is too high, it will cause the flux activity in the solder paste to fail;

JJY is a well-established solder paste manufacturer with a history of fifteen years. For many years, it has been committed to the research and development and production of solder paste. 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.