Localized routing direction
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United States of America Patent
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Aug 21, 2012
Grant Date -
N/A
app pub date -
Jul 13, 2006
filing date -
Jul 13, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A routing method for a multilayer circuit design layout that has a set of possible preferred local routing directions and a default preferred routing direction for each layer. The method receives a set of user specified constraints on routing directions for particular regions of the design layout. The method tessellates the available routing space into separate tiles and automatically defines a preferred local routing direction for each tile based on the user specified constraints. The set of user specified constraints includes user designated flows, locked etches, “etch keep-out” areas, user “planned” data, etc. A routing method for a multilayer design layout that receives a first set of user specified preferred routing directions for particular regions of the multilayer design layout. The method tessellates the available routing space into separate tiles and automatically defines a second preferred local routing direction for each tile based on the user specified preferred routing directions.
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