Solitary-sided PCB board: The solder joints are concentrated on a single aspect, and components are often inserted on one other side. Some products even now have SMD components about the copper-clad side. Double-sided board: Either side is often layout, and both of those may have plug-in components or SMD components. https://16-layer3-levelhdipcb73715.izrablog.com/31779209/examine-this-report-on-8-layer-first-order-pcb