線路板

PCB can be also called printed wire board while there are no embedded components.  The common based material is FR4 board with the copper layer.  Usually copper is etched inside the board (Between the layers of plastic).  Electronic components are then mounted to this base using a conductive material (metal).  The circuits etched into the board allow electricity to go through from one component to another, so the parts can work together.

more printed wire board catalogues.