About Usmore

About us
 Shenzhen KingshengPCBA Tech Co.,Ltd (HK C-Alley Co.,Ltd), an professional PCBA manufactuer and electronics manufacturing service (EMS) provider for 12years.SMT factory has ISO9001, ISO14001, TS16949 certification, advanced production equipment and rich experience in the production of PCBA. more

How to control solder paste printing in PCBA processing?
How to control solder paste printing in PCBA processing?
1.Steel mesh
The opening of the stencil must be appropriately enlarged or reduced according to the layout of the electronic components on the PCBA board to determine the amount of tin on the pad, so as to achieve the best soldering effect and avoid the occurrence of tin connection and less tin, which requires craftsmanship The engineer conducts a rigorous evaluation. In addition, the material of the steel mesh is also critical.
2.Solder paste
Solder paste needs to use mid-to-high-end brands, such as Senju and Vitero. The solder paste must be stored strictly in a refrigerator at 2 to 10 degrees Celsius.
3.Solder paste printing
At present, manufacturers are using fully automatic solder paste printers, whose equipment can well control the printing strength and speed and other parameters, and has a certain automatic cleaning function. The operator only needs to set the parameters in strict accordance with the regulations.
4.SPI printing effect detection
After the solder paste printing machine, it is particularly important to configure the SPI solder paste detector, which can effectively detect many defects such as small tin, continuous tin, gap, wire drawing, and offset in the solder paste printing process. So as to maximize the overall welding PPM value.