Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
2006-03-14
2006-03-14
Garbowski, Leigh M. (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
C716S030000, C716S030000, C716S030000, C716S030000
Reexamination Certificate
active
07013450
ABSTRACT:
Some embodiments of the invention provide a method of routing several nets in a region of a design layout. Each net includes a set of pins in the region. In some embodiments, the method partitions the region into several sub-regions that have a number of edges between them. The method (1) for each particular edge, identifies an edge-intersect cost based on a set of potential routes for the nets that intersect the particular edge, and (2) selects routes for the nets based on the computed edge-intersect costs. A potential route for a particular net traverses the set of sub-regions that contain the particular net's set of pins. Also, different embodiments identify different edge-intersect costs. For instance, the edge-intersect cost of a particular edge (1) can be the number of routes that intersect the particular edge, (2) can be a edge-intersect probability that equals the number of routes that intersect the particular edge divided by the total number of routes, or (3) can be a cost derived from the edge-intersect probability. Other embodiments might define other edge-intersect costs. In other embodiments, the method partitions the region into several sub-regions that have a number of paths between them. The method next (1) for each particular path, identifies a path-use cost based on a set of potential routes for the nets that use the particular path, and (2) selects a route for each net based on the computed path-use costs. Different embodiments identify different path-use costs. For instance, the path-use cost of a particular path (1) can be the number of routes that use the particular path, (2) can be a path-use probability that equals the number of routes that use the particular path divided by the total number of routes, or (3) can be a cost derived from the path-use probability. Other embodiments might define other path-use costs.
REFERENCES:
patent: 4593363 (1986-06-01), Burstein et al.
patent: 4615011 (1986-09-01), Linsker
patent: 4673966 (1987-06-01), Shimoyama
patent: 4782193 (1988-11-01), Linsker
patent: 4855929 (1989-08-01), Nakajima
patent: 5097422 (1992-03-01), Corbin, II et al.
patent: 5218551 (1993-06-01), Agrawal et al.
patent: 5251147 (1993-10-01), Finnerty
patent: 5267176 (1993-11-01), Antreich et al.
patent: 5281151 (1994-01-01), Arima et al.
patent: 5360948 (1994-11-01), Thornberg
patent: 5375069 (1994-12-01), Satoh et al.
patent: 5532934 (1996-07-01), Rostoker
patent: 5566078 (1996-10-01), Ding et al.
patent: 5578840 (1996-11-01), Scepanovic
patent: 5587923 (1996-12-01), Wang
patent: 5618744 (1997-04-01), Suzuki et al.
patent: 5633479 (1997-05-01), Hirano
patent: 5634093 (1997-05-01), Ashida et al.
patent: 5635736 (1997-06-01), Funaki et al.
patent: 5636125 (1997-06-01), Rostoker et al.
patent: 5637920 (1997-06-01), Loo
patent: 5640327 (1997-06-01), Ting
patent: 5650653 (1997-07-01), Rostoker et al.
patent: 5657242 (1997-08-01), Sekiyama et al.
patent: 5663891 (1997-09-01), Bamji et al.
patent: 5723908 (1998-03-01), Fuchida et al.
patent: 5742086 (1998-04-01), Rostoker et al.
patent: 5757089 (1998-05-01), Ishizuka
patent: 5757656 (1998-05-01), Hershberger et al.
patent: 5777360 (1998-07-01), Rostoker et al.
patent: 5784289 (1998-07-01), Wang
patent: 5798936 (1998-08-01), Cheng
patent: 5811863 (1998-09-01), Rostoker et al.
patent: 5822214 (1998-10-01), Rostoker et al.
patent: 5838583 (1998-11-01), Varadarajan et al.
patent: 5859449 (1999-01-01), Kobayashi et al.
patent: 5889677 (1999-03-01), Yasuda et al.
patent: 5898597 (1999-04-01), Scepanovic et al.
patent: 5914887 (1999-06-01), Scepanovic et al.
patent: 5973376 (1999-10-01), Rostoker et al.
patent: 5980093 (1999-11-01), Jones et al.
patent: 6035108 (2000-03-01), Kikuchi
patent: 6058254 (2000-05-01), Scepanovic et al.
patent: 6067409 (2000-05-01), Scepanovic et al.
patent: 6068662 (2000-05-01), Scepanovic et al.
patent: 6070108 (2000-05-01), Andreev et al.
patent: 6088519 (2000-07-01), Koford
patent: 6123736 (2000-09-01), Pavisic et al.
patent: 6128767 (2000-10-01), Chapman
patent: 6134702 (2000-10-01), Scepanovic et al.
patent: 6150193 (2000-11-01), Glenn
patent: 6155725 (2000-12-01), Scepanovic et al.
patent: 6175950 (2001-01-01), Scepanovic
patent: 6209123 (2001-03-01), Maziasz et al.
patent: 6216252 (2001-04-01), Dangelo et al.
patent: 6219832 (2001-04-01), Buzbee
patent: 6226560 (2001-05-01), Hama et al.
patent: 6230306 (2001-05-01), Raspopovic et al.
patent: 6247167 (2001-06-01), Raspopovic et al.
patent: 6249902 (2001-06-01), Igusa et al.
patent: 6253363 (2001-06-01), Gasanov et al.
patent: 6260179 (2001-07-01), Ohsawa et al.
patent: 6262487 (2001-07-01), Igarashi et al.
patent: 6289495 (2001-09-01), Raspopovic
patent: 6295634 (2001-09-01), Matsumoto
patent: 6301686 (2001-10-01), Kikuchi et al.
patent: 6307256 (2001-10-01), Chiang et al.
patent: 6316838 (2001-11-01), Ozawa et al.
patent: 6324674 (2001-11-01), Andreev et al.
patent: 6324675 (2001-11-01), Dutta et al.
patent: 6327693 (2001-12-01), Cheng et al.
patent: 6327694 (2001-12-01), Kanazawa
patent: 6330707 (2001-12-01), Shinomiya et al.
patent: 6378121 (2002-04-01), Hiraga
patent: 6385758 (2002-05-01), Kikuchi et al.
patent: 6401234 (2002-06-01), Alpert et al.
patent: 6405358 (2002-06-01), Nuber
patent: 6407434 (2002-06-01), Rostoker et al.
patent: 6412097 (2002-06-01), Kikuchi et al.
patent: 6412102 (2002-06-01), Andreev et al.
patent: 6415422 (2002-07-01), Mehrotra et al.
patent: 6436804 (2002-08-01), Igarashi et al.
patent: 6442743 (2002-08-01), Sarrafzadeh et al.
patent: 6446245 (2002-09-01), Xing et al.
patent: 6448591 (2002-09-01), Juengling
patent: 6473891 (2002-10-01), Shively
patent: 6480991 (2002-11-01), Cho et al.
patent: 6490713 (2002-12-01), Matsumoto
patent: 6516455 (2003-02-01), Teig et al.
patent: 6519751 (2003-02-01), Sriram et al.
patent: 6543043 (2003-04-01), Wang et al.
patent: 6546540 (2003-04-01), Igarashi et al.
patent: 6557145 (2003-04-01), Boyle et al.
patent: 6567967 (2003-05-01), Greidinger et al.
patent: 6651233 (2003-11-01), Teig et al.
patent: 2001/0003843 (2001-06-01), Scepanovic et al.
patent: 2001/0009031 (2001-07-01), Nitta et al.
patent: 2002/0069397 (2002-06-01), Teig et al.
patent: 2002/0073390 (2002-06-01), Teig et al.
patent: 2002/0100007 (2002-07-01), Teig et al.
patent: 2002/0124231 (2002-09-01), Teig et al.
patent: 2002/0133798 (2002-09-01), Teig et al.
patent: 2002/0147958 (2002-10-01), Teig et al.
patent: 2002/0157075 (2002-10-01), Teig et al.
patent: 2002/0166105 (2002-11-01), Teig et al.
patent: 2002/0170027 (2002-11-01), Teig et al.
patent: 2002/0174412 (2002-11-01), Teig et al.
patent: 2002/0182844 (2002-12-01), Igarashi et al.
patent: 2002/0199165 (2002-12-01), Teig et al.
patent: 2003/0005399 (2003-01-01), Igarashi et al.
patent: 2003/0018947 (2003-01-01), Teig et al.
patent: 2003/0023943 (2003-01-01), Teig et al.
patent: 2003/0025205 (2003-02-01), Shively
patent: 2003/0043827 (2003-03-01), Teig et al.
patent: 2003/0063568 (2003-04-01), Teig et al.
patent: 2003/0063614 (2003-04-01), Teig et al.
patent: 2003/0064559 (2003-04-01), Teig et al.
patent: 2003/0066042 (2003-04-01), Teig et al.
patent: 2003/0066043 (2003-04-01), Teig et al.
patent: 2003/0066044 (2003-04-01), Teig et al.
patent: 2003/0066045 (2003-04-01), Teig et al.
patent: 2003/0079193 (2003-04-01), Teig et al.
patent: 2003/0088841 (2003-05-01), Teig et al.
patent: 2003/0088844 (2003-05-01), Teig et al.
patent: 2003/0088845 (2003-05-01), Teig et al.
patent: 2003/0101428 (2003-05-01), Teig et al.
patent: 2003/0115566 (2003-06-01), Teig et al.
patent: 2003/0121015 (2003-06-01), Teig et al.
patent: 2003/0121017 (2003-06-01), Andreev et al.
patent: 64-15947 (1989-01-01), None
patent: H03-173471 (1991-07-01), None
patent: 04000677 (1992-01-01), None
patent: H05-102305 (1993-04-01), None
patent: H05-243379 (1993-09-01), None
patent: H07-86407 (1995-03-01), None
patent: H09-162279 (1997-06-01), None
patent: 411296560 (1999-10-01), None
patent: 2000-82743 (2000-03-01), None
A.H. Farrahi, et al., Quality of EDA CAD Tools: Definitions, Metrics and Directions, Quality Electronic Design, 2000, Proceedings of the first International Symposium
Buset Oscar
Teig Steven
Cadence Design Systems Inc.
Garbowski Leigh M.
Stattler Johansen & Adeli LLP
LandOfFree
Method and apparatus for routing 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 routing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for routing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3563626