Boots – shoes – and leggings
Patent
1995-12-12
1998-12-22
Teska, Kevin J.
Boots, shoes, and leggings
364490, 364489, 364488, G06F 1700, G06F 1750
Patent
active
058525629
ABSTRACT:
To reduce a circuit block in area, the present invention provides an LSI layout design method having a cell changing processing for reducing a pure wiring zone in area.
By an input processing, circuit design information and cell library are entered. Then, a layout of cells arranged in a plurality of cell rows is designed by a cell placing processing. Then, the height of a wiring zone required between cell rows is estimated by a wiring zone height estimating processing. To reduce the area of a pure wiring zone other than the over-the-cell wiring zones, each of placed cells is changed, by a cell changing processing, to a cell having the same specifications and a different shape or a different terminal position. A layout of cell interconnection is designed by a wiring processing. Based on the layout thus obtained by the processings above-mentioned, a mask pattern is prepared and supplied by a mask pattern preparing processing.
REFERENCES:
patent: 4400712 (1983-08-01), O'Connor
patent: 5159682 (1992-10-01), Toyonaga et al.
patent: 5187668 (1993-02-01), Okude et al.
patent: 5267177 (1993-11-01), Sato et al.
patent: 5272645 (1993-12-01), Kawakami et al.
patent: 5506788 (1996-04-01), Cheng et al.
Koide et al. "A New Global Routing Algorithm for Over-the-Cell Routing in Standard Cell Layouts," IEEE, 1993, 116-121.
Bhingarde et al. "Over-the-Cell Routing Algorithms for Industrial Cell Models," IEEE, 1996, pp. 143-148.
Cherng et al. "An Efficient Over-the-Cell Channel Router," IEEE, 1993, pp. 133-137.
Holmes et al. "Algorithm for Three-Layer Over-the-Cell Channel Rating," IEEE, 1991, pp. 428-431.
Wang et al. "Topological Cell Compaction Via Transistor Rotation," IEEE, 1991, pp. 909-912.
Madhwapathy et al. "An Efficient Four Layout Over-the-Cell Router," IEEE, pp. 187-190, Jun. 1994.
Lin et al. "Cell Height Reduction by Routing Over-the-Cells," IEEE, pp. 2244-2247, May 1992.
Bo Wu et al., "Over-the-Cell Router for New Cell Model," 29th ACM/IEEE Design Automation Conference, pp. 604-607, 1992.
H. Shin et al., "Two Dimensional Compaction By `Zone Refining`", 23rd Design Automation Conference, pp. 115-122, 1986.
Akino Toshiro
Fukui Masahiro
Shinomiya Noriko
Toyonaga Masahiko
Matsushita Electric - Industrial Co., Ltd.
Siek Vuthe
Teska Kevin J.
LandOfFree
Method and apparatus for designing an LSI layout utilizing cells does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for designing an LSI layout utilizing cells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for designing an LSI layout utilizing cells will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2052677