Automatic router capable of searching for a new wiring with refe

Details Automatic router capable of searching for a new wiring with refe Automatic router capable of searching for a new wiring with refe

1993-06-25

1994-05-24

Trans, Vincent N.

Boots, shoes, and leggings

364489, 364488, G06F 1560

Patent

active

053155351

ABSTRACT:
In an automatic router for use in automatically designing wiring paths among connection elements, such as via holes, terminals, on a wiring board, connection failures are previously detected by a connection failure detecting portion. Provisional wiring paths are successively selected by a path searching portion with reference to the connection failures to decide a new wiring path. The new wiring path is inserted among existing wiring paths by moving adjacent ones of the existing wiring paths in a predetermined direction. The connection failures may be specified, for example, by channel failures which appear when any wiring paths can fail to be arranged between the connection elements or by terminal network data signals produced on superposition of coordinate components of adjacent ones of the via holes.

REFERENCES:
patent: 4752887 (1988-06-01), Kuwahara
patent: 4768154 (1988-08-01), Sliwkowski et al.
patent: 4805113 (1989-02-01), Ishii et al.
patent: 4835705 (1989-05-01), Fujino et al.
patent: 4855929 (1989-08-01), Nakajima
"Automated Rip-Up and Rerouter Techniques" by W. A. Dees et al., IEEE 19th Design Automation Conference, 1982, pp. 432-439.
"A Block Interconnection Algorithm for Hierarchical Layout System" by Fukui et al., IEEE Trans. on C.A.D., vol. CAD6., No. 3, May 1987, pp. 383-390.
"Automatic Placement and Routing of Gate Arrays" by G. Robson, VLSI Design, Apr. 1984, pp. 35, 36, 38-40, 42 and 43.
"Outline of Interactive Printed Substrate Design System and Automatic Layout Procedure" by K. Daishidou et al., National Conf. 1985, pp. 1-5.

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