Automatic wiring processing unit of a multi-layer printed wiring board design automation equipment

摘要

PURPOSE:To effectively use all layers of a multilayer printed wiring board by performing automatic wiring processing after replacing with positional information of land pads which connect tip parts of outgoing wirings. CONSTITUTION:When two layers selected by a two-layer selection means 2 do not include land pads 11 and 12 to perform wiring processing, an outgoing wiring processing means 4 performs pattern pulling 13 from one side land pad 11 so as to form interlayer via holes 14 and 16 on the selected two layers respectively. In case the outgoing wiring processing succeeds, pattern pulling is performed from the via holes 14 and 16 by an interpoint automatic wiring processing means 5 respectively in order to perform wiring connection between the patterns 17 and 18 through an interlayer via hole 19. An interference judging means 7 checks whether or not this wiring connection interferes the other land pads or the like and in the case of no existing interference, wiring routes 13 to 19 are registered is a design data storage means 1. Thereby, all layers of a multilayer printed wiring board can be effectively used.