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Method and apparatus for costing routes of nets

  • US 6,892,369 B2
  • Filed: 12/31/2002
  • Issued: 05/10/2005
  • Est. Priority Date: 11/18/2002
  • Status: Active Grant
First Claim
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1. A method of costing routes for a set of nets in an integrated circuit (“

  • IC”

    ) layout, the method comprising;

    a) identifying at least one route for each net in the IC layout, wherein each route has a particular length;

    b) identifying an estimated route length for each net; and

    c) computing a routing cost of the IC layout that includes an exponential expression for each net, wherein each net'"'"'s exponential expression includes a base and an exponent, wherein the exponent of net'"'"'s exponential expression includes the length of the net'"'"'s route divided by the estimated route length for the net.

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