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Local preferred direction architecture, tools, and apparatus

  • US 7,441,220 B2
  • Filed: 12/06/2004
  • Issued: 10/21/2008
  • Est. Priority Date: 12/07/2000
  • Status: Expired due to Fees
First Claim
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1. A design layout comprising:

  • a plurality of routing layers; and

    a first polygonally shaped region and a second polygonally shaped region on one of the layers, the first region having a first local preferred routing direction and the second region having a second local preferred routing direction that is different than the first local preferred routing direction, wherein a local preferred routing direction of a region defines a preferred direction for defining routes in the region, wherein the first region has a different shape than the second region, wherein the first region is in the shape of a non-quadrilateral polygon,wherein the first region does not encompass the second region and the second region does not encompass the first region.

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