Modern printed circuit boards (PCBs) are very convenient solutions to the problem of how to conduct electricity within electronic devices. Most of them are made out of the same basic components, although some forms of PCB design may elect to use different materials, depending on the needs of the designer.
For your typical design, the board is made out of layers of different materials, which are fused together through a lamination process. The rigid core of the board is often made out of fiberglass, which is fused with a layer of copper foil. Using a chemical process, the manufacturer adds traces on the layer of copper, which will become the conductive paths of the board. In other words, those traces serve the same functions as copper wires.
Finally, a solder mask layer is added on top of the board, which protects and insulates the copper layer. The solder mask is a type of resin that can be of any color, but traditionally it is green, and that resign layer is what gives circuit boards its traditional green look. The resin also protects the copper layer from being damaged by the soldering process often used to attach necessary components to the board.
If all that sounded complicated, it’s because it is. Luckily, people looking for PCB design services can get in touch with qualified professionals who will handle the design and production stages.