METHOD AND APPARATUS FOR DETERMINING WIRING ROUTE ON CIRCUIT BOARD AND INFORMATION STORAGE MEDIUM

摘要

A method for determining a wiring route from inner leads to lands (32) arranged in a matrix around the inner leads, comprising the step of imaginarily arranging around the lands (32) counters (300) opened according to predetermined rules and adapted for counting the wiring routes passing between adjacent lands, the wiring route determining step of repeatedly performing a wiring route determining process for determining the wiring route from the next inner lead adjacent to the inner lead for which the wiring route has been determined to the land (32) determined to be wired next according to predetermined rules in such a way that the route does not cross the just previously determined route and passes between the lands where opened counters exist, and the counter controlling step of closing the opened counters whose counts exceed and the opened counters for which the wiring routes of the corresponding lands are determined, opening the closed counters opposite to the counters having been closed through corresponding lands, and setting a route for introducing new wiring.