Patent ID: 6397376
Filing Date: 2002-05-28
Classification: G06F,H01L

Abstract:
A method of determining interconnect routes in a circuit board, said interconnect routes running from a plurality of virtual interconnect targets to lands arranged in a matrix on at least one of inside and outside of said virtual interconnect target, said virtual interconnect target forming a target group arranged into a substantially rectangular frame, said method comprising:a first step of assigning an order of priority to each of said lands; and a second step of performing processing for determining an interconnect route between a next virtual interconnect target adjacent to another virtual interconnect target of which an interconnect route has been determined and a next interconnect land according to said order of priority, wherein, in said first step, when a rectangle formed by said lands is divided into eight areas by centerlines and diagonals, and when a plurality of oblique lines connecting lands included in said lands which are adjoining each other in a direction parallel to the diagonals are priority order setting lines, priority of each land included in each of said divided areas is set so that higher priority is assigned to a land on one of said priority order setting lines further from the diagonals, and higher priority is assigned to a land positioned further from the target group, on the same priority order setting line.