Manufacturers use flux to solder components on PCBs. Depending on the PCB components, flux also varies and is used to fix them on the board. It ensures uninterrupted and strong electrical connections between devices. However, it is crucial to remove excess flux so as not to blur signal traces or damage connections. In this article, we have introduced various methods and basic steps to remove flux from PCBs.
Some people say that it should be kept. The reasons are probably: 1. Sometimes a large blank is not good-looking. 2. Increase the mechanical properties of the board to avoid uneven bending.