US Patent 7389486 Arc routing system and method

An arc routing system and method are disclosed, which are integrated to a PCB (printed circuit board) routing system for assisting the PCB routing system to route wires in an area of a printed circuit board with high component density. First, three neighboring points in a routing direction in the area of the printed circuit board are selected by a selecting module, wherein one of the three points is located on one side of a line extending in the routing direction and the two others are located on the other side of the line. Then, information related to the three selected points and routing information are read by a reading module. Subsequently, the center point, radius, start point and end point for an arc-shaped wire to be routed are set by a setting module. Finally, the arc-shaped wire is drawn by a drawing module. Thereby, routing efficiency is increased and electrical connection performance of printed circuit boards is improved.