One-sided PCB board: The solder joints are concentrated on a person side, and components usually are inserted on one other aspect. Some products nevertheless have SMD components around the copper-clad aspect. Double-sided board: Each side is often structure, and the two might have plug-in components or SMD components. ---What exactly https://metal-pcb-copper-based-bo62715.blog-a-story.com/11572823/four-layer-inner-and-outer-layers-2oz-copper-thick-pcb-circuit-board-things-to-know-before-you-buy