Single-sided PCB board: The solder joints are concentrated on a person aspect, and components are usually inserted on the opposite side. Some products however have SMD components about the copper-clad facet. Double-sided board: Both sides is often layout, and both equally can have plug-in components or SMD components. But to 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