Color of circuit board

Generally, the majority of PCBs are green or brown. Of course, some products use more beautiful colors. However, most of them are due to appearance rather than product performance or production requirements. This is the color of solder mask. For PCB, solder mask is very important. It is the protective layer of insulation, which can protect copper wire and prevent components from being soldered to the wrong place. Another layer of silk screen is printed on the solder mask. Usually, words and symbols (mostly white) will be printed on it to mark the position of each component on the board. The screen printing surface is also called the legend.