Method and apparatus for storing routes for groups of related net configurations
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United States of America Patent
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Jul 8, 2008
Grant Date -
Apr 3, 2003
app pub date -
Jan 4, 2002
filing date -
Aug 23, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Some embodiments of the invention provide a method that pre-computes routes for groups of related net configurations. These routes are used by a router that uses a set of partitioning lines to partition a region of a design layout into a plurality of sub-regions. The method identifies groups of related sub-region configurations. For each group, the method stores a base set of routes. For each configuration in each group, the method also stores an indicia that specifies how to obtain a related set of routes for the particular configuration from the base set of routes stored for the configuration's group.
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