Single-sided PCB board: The solder joints are concentrated on one side, and components tend to be inserted on one other side. Some products however have SMD components within the copper-clad side. Double-sided board: Both sides is often layout, and both can have plug-in components or SMD components. The metal layers https://trevoruvxya.digitollblog.com/31076766/ultrasound-machine-high-level-pcb-circuit-board-fundamentals-explained