Method for determining air-bridge post placement

Details Method for determining air-bridge post placement Method for determining air-bridge post placement

1988-10-26

1992-06-09

Lall, Parshotam S.

Boots, shoes, and leggings

364490, 364489, 364488, G06F 1560

Patent

active

051213362

ABSTRACT:
For air-bridges running orthogonally to the channel, a detailed routing of the interconnect lines is performed. A post expansion is then performed to spread existing lines by adding more tracks if required for support posts. The interconnect lines are then scanned to determine post placements. For air-bridges running parallel to the channel, empty post positions are determined and aligned to optimize the distance between positions. Detailed routing is then performed and the lines are scanned to determine post placement. Finally, cell rows and interconnects are compacted.

REFERENCES:
patent: 3603771 (1971-09-01), Isett et al.
patent: 3681782 (1972-08-01), Scanlon
patent: 4577276 (1986-03-01), Dunlop et al.
patent: 4613941 (1986-09-01), Smith et al.
patent: 4630219 (1986-12-01), DiGiacomo et al.
patent: 4686629 (1987-08-01), Noto et al.
patent: 4731594 (1988-03-01), Kumar
"Compaction Based Custom LSI Layout Design Method" by M. Ishikawa et al., IEEE International Conf. on Computer-Aided Design, Nov. 18-Nov. 21, 1985, pp. 343-345.

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