How do you solder through a hole in a PCB?
Custom pcb fabrication, circuit boards, PCB boards, and later use selective soldering. This will become a welding method for custom pcb fabrication to complete the remaining plug-in parts economically and effectively, and is fully compatible with future lead-free soldering.
The process characteristics of selective soldering can be compared with Wave Solder for PCBA to understand the process characteristics of selective soldering. The most obvious difference between the two is that in wave soldering, the lower part of the PCB is completely immersed in liquid solder, while in selective soldering, only some specific areas are in contact with the solder wave. Since the PCB itself is a poor heat conduction medium, it will not heat and melt the solder joints of adjacent components and the PCB area during soldering. Flux must also be pre-applied before soldering. Compared with wave soldering, the flux is only applied to the lower part of the PCB to be soldered, not the entire PCB. In addition, selective soldering is only suitable for the soldering of plug-in components. Selective welding is a brand new method. A thorough understanding of selective welding process and equipment is necessary for successful welding.
Selective soldering process The typical selective soldering process includes: flux spraying, PCB preheating, dip soldering and drag soldering.
