The wiring method includes determining wirings based on a condition that one through-hole is formed; picking up a pair of wirings that are disposed on different layers and that need to be electrically connected to each other, from among the determined wirings, and extracting areas occupied by the wirings;...http://www.google.de/patents/US6769106?utm_source=gb-gplus-sharePatent US6769106 - Method of wiring semiconductor integrated circuit, semiconductor integrated circuit, and computer product
