Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
2008-03-25
2008-03-25
Chiang, Jack (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
C716S030000
Reexamination Certificate
active
07350173
ABSTRACT:
Methods and apparatuses to place and route cells on integrated circuit chips along paths. In one aspect of the invention, methods to layout an integrated circuit are based on placing and routing cells along paths. In one embodiment, a method to layout an integrated circuit including: routing a wire to connect a first cell of the integrated circuit and a second cell of the integrated circuit; and placing a third cell of the integrated circuit after the wire is routed to connect the first cell and the second cell. In one example, the first, second and third cells are on a first path; and, the third cell is connected to one of the first and second cells on the first path by only one net. The first path is selected from a set of paths; and the first and second cells are placed before the wire is routed to connect the first cell and the second cell. Timing is analyzed using a route of the wire connecting the first cell and the second cell to select a second path from the set of paths before a cell is placed on the second path.
REFERENCES:
patent: 5461576 (1995-10-01), Tsay et al.
patent: 6074430 (2000-06-01), Tsukiboshi
patent: 6249902 (2001-06-01), Igusa et al.
patent: 6311313 (2001-10-01), Camporese et al.
patent: 6378114 (2002-04-01), Shenoy et al.
patent: 6480991 (2002-11-01), Cho et al.
patent: 6505335 (2003-01-01), Tanaka
patent: 6516456 (2003-02-01), Garnett et al.
patent: 6519750 (2003-02-01), Yamashita
patent: 6546541 (2003-04-01), Petranovic et al.
patent: 6598215 (2003-07-01), Das et al.
patent: 6601226 (2003-07-01), Hill et al.
patent: 6609238 (2003-08-01), Tetelbaum
patent: 6701289 (2004-03-01), Garnett et al.
patent: 6704916 (2004-03-01), Nishida et al.
patent: 6735742 (2004-05-01), Hatsch et al.
patent: 6889370 (2005-05-01), Kerzman et al.
patent: 7051310 (2006-05-01), Tsao et al.
patent: 2001/0021992 (2001-09-01), Yamashita
patent: 2003/0005398 (2003-01-01), Cho et al.
Ang Roger P.
McElvain Ken R.
McElvain Kenneth S.
Blakely , Sokoloff, Taylor & Zafman LLP
Chiang Jack
Synplicity, Inc.
Tat Binh
LandOfFree
Method and apparatus for placement and routing cells on... 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 placement and routing cells on..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for placement and routing cells on... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2786551