What are the common requirements for solder paste in SMT processing?

SMTSolder paste is one of the important raw materials for production during processing, and its quality will also be crucialSMTThe quality of surface mount technology (SMT) processing has a direct impact. Below, a solder paste manufacturer in Shenzhen will give you a brief introductionSMTProcessing forSolder pasteWhat are the common requirements:

1It needs to have a relatively long storage life0 ~ 10°CIt can be preserved under certain conditions3~6It is advisable to store it for about one month. During storage, no chemical changes should occur, and there should be no separation of solder powder and flux. Moreover, the viscosity and adhesion of the solder paste should remain unchanged.

2It needs to have good wetting performanceSMTIn surface mount technology (SMT) processing, it is necessary to correctly select the active agent and wetting agent components in the flux to better meet the wetting performance requirements.

3It needs to have a relatively long working life, and the solder paste is inSMTIt is printed or coated by a solder paste printer during the surface mount technology (SMT) processPCBAfter application and during the subsequent reflow soldering preheating process, it can be placed at room temperature12~24hHowever, the performance remains basically unchanged, maintaining the original shape and size.

4,SMTDuring the processing and soldering, there must be no adverse phenomena such as solder spatter or solder beads. Such issues will lead to a decline in the quality of the surface mount products. Whether these problems occur mainly depends on the water absorption of the solder, the type, boiling point and amount of the solvent in the solder, as well as the type and content of impurities in the solder powder.

5It should have good welding strength. After welding is completed, it should be ensured that no components will fall off due to factors such as vibration.

6The post-welding residue has good stability, is non-corrosive, has a relatively high insulation resistance, and is easy to clean.

The above content about solder paste is explained by Shenzhen JJY Solder Paste Manufacturer. If you want to know more about solder paste products, please follow and interact with us.