Concentric metal density power routing
US6476497B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2001 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Jun 13, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A method for concentric metal density power distribution is disclosed that reduces metal density and increases available area for routing clock and signal traces. A method of concentric metal density power distribution includes the steps of partitioning an area of standard cells in an integrated circuit chip into a plurality of power regions, forming a power boundary around each of the plurality of power regions, and forming a plurality of concentric straps in a metal layer of the integrated circuit chip wherein each of the plurality of concentric straps has a strap width that varies from a maximum strap width at a periphery of each of the plurality of power regions to a minimum strap width toward a center of each of the plurality of power regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.