or multi-layered (outer and inner layers of copper alternating with insulating layers). Among the multi-layer PCBs, the most common are the four-layer ones. The four-layer board has many more routing options in the internal layers compared to the silkscreen two-layer board, and often part of the internal layers are used as a
PCB can have silkscreen a coating that protects the copper from corrosion and reduces the chances of solder shorting between traces or unwanted electrical contact with possible loose wires. For its function of helping to prevent solder shorts, the coating is called a solder mask. Soldermask is generally green in color but
fields of activity has led to a silkscreen revolution in the types and models of printed circuits. Technology has penetrated more and more areas of our lives and required modernization, and the printed circuit through its continuous improvement was one of the first aids that allowed this modernization. The smaller and