Solitary-sided PCB board: The solder joints are concentrated on a single facet, and components are frequently inserted on the other aspect. Some products nonetheless have SMD components around the copper-clad aspect. Double-sided board: Each side might be layout, and both can have plug-in components or SMD components. Solder mask is https://12-layerautomotivecentral50482.blogozz.com/30744180/about-12-layer-thick-copper-power-pcb