PCBs are either single-sided (with one copper layer), two/double-sided (two copper layer with a substrate layer between them), or multilayer (multiple layers of the two-sided PCB). The typical PCB thickness is 0.063inches or 1.57mm; it is a standardized level defined from the past. Standard PCBs use a dielectric and copper as their most prominent metal consist of different layers of material. They feature a substrate, or base, made from fiberglass, polymers, ceramic or another non-metal core. Many of these PCBs use FR-4 for the substrate.Many factors come into play when purchasing and manufacturing a printing circuit board (PCB) such as profile, weight, and the components. You can find standard PCBs used in a nearly infinite number of applications. Their capabilities depend on their materials and construction, so they power low-end and high-end electronics alike. Single-sided PCBs appear in less complicated devices such as calculators, while multilayer boards have the potential to support space equipment and supercomputers.