Method of and system for routing

摘要

A routing preprocessing unit properly rearranges routing conditions beforehand with respect to parts in which physical conditions in terms of assembling or packaging in an original circuit are changeable. A feedback section feeds pin assignment data back to an assembling or a packaging design system for high-order hierarchy parts in the original circuit and thus changes a pin assignment through a design of the high-order hierarchy parts themselves. An automatic routing unit specifically designs high-density wiring patterns without using a via. A routing layer allocating section collects part-to-part route bundles bearing such a positional relationship as to cause no intersection and no overlap on the basis of routing data and allocates the route bundle to the same routing layer on a multilayer routing board including a plurality of routing layers. A routing order determining section determines a routing order of the route bundle. A detail routing section creates PCB wiring patterns by sequentially arranging respective connection lines.