Method and apparatus for searching for a global path
US7010771B2 · kind B2 · utility
16Cited by
109References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2002 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Dec 31, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/394
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Some embodiments of the invention provide a method of searching for a global path between first and second sets of routable elements in a region of a layout. The method partitions the region into several rectangular sub-regions. It then identifies a set of sub-regions that contain the two sets of elements. Next, it performs a path search to identify a set of path expansions between a sub-region that contains a first-set element and a sub-region that contains a second-set element. When the method performs the path search, it explores expansions along non-Manhattan directions between the sub-regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.