Double-sided printed circuit boards offer an enhanced level of complexity compared to their single-sided counterparts. They feature conductive material on the board on both sides and conductive material inside the holes, enabling intricate design possibilities. With the ability to switch between top and bottom layers using vias, these boards facilitate closer routing traces. Connections between the two sides of the board are achieved by drilling holes and plating through them, making these boards ideal for numerous electronic products requiring interconnected circuits.