A printed circuit board (PCB) is a key technological platform utilized in modern electronic systems. Structurally, it consists of a non-conductive substrate, often made of reinforced laminate materials, onto which precise conductive pathways are etched or deposited. These copper traces serve as electrical highways, allowing various electronic components, such as integrated circuits, resistors, and capacitors, to be mounted and connected in a controlled manner. PCBs manage the routing and distribution of electrical signals and power across a device, enabling the construction of complex, functional units ranging from sophisticated computing devices to simple household appliances. Their design ensures reliable and repeatable electrical connections, which is fundamental to the functionality of almost all contemporary electronic instrumentation.