Printed Circuit Boards (PCBs) form the backbone of modern electronic devices, offering mechanical support and electrical connections for components. Composed of multiple layers of conductive copper and insulating materials, PCBs enable the integration of resistors, capacitors, and microchips into a single, compact unit. Used across a wide range of industries from consumer electronics to aerospace, PCBs ensure signal integrity and efficiency, making them essential for reliable performance in high-tech applications.