Solder mask

Soldering is a way of connecting metal parts like wires and electronic components together to make something. Solder mask is like a special coating that goes on top of the parts that have been soldered together. This coating helps to keep the parts from getting dirty or coming apart, and it also makes the parts look nice and shiny. It also prevents the metal parts from corroding or rusting if they get exposed to the air or water. Solder mask is really important for making sure the connections stay strong for a long time.