Pcb is a handy tool for the X Window System to design printed circuit boards. All coordinate units are 1/1000 inch. A layout consists of lines, arcs, polygons, elements , vias, and text information seperated into several layers. Each of them is identified by a unique name and color . SMD circuits are also supported.
A flat board made of fiberglass or plastic, on which chips and electronic components are interconnected via copper pathways. The primary PCB in a system is called a system board or motherboard, while smaller ones that plug into the slots in the main board are called riser boards or cards.
A type of circuit board which has conducting tracks superimposed, or "printed", on one or both sides, and may also contain internal signal layers and power and ground planes. An alternative name, Printed Wire Board (PWB), is commonly used in America.