Wire routing optimization
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United States of America Patent
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Jun 25, 2002
Grant Date -
N/A
app pub date -
Jul 22, 1998
filing date -
Jul 22, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is directed to optimization of an initial routing that connects nets on a surface, each of the nets including plural interconnected net pins. The surface is divided into a set of areas, and a boundary pin is defined at each point on a boundary of one of the areas where the boundary of the one of the areas intersects a net. Routing optimization is then performed in at least one of the areas, the routing optimization optimizing the routing among the net pins and the boundary pins within the at least one of the areas. The invention is also directed to optimization of an initial routing that connects nets on a surface, each of the nets including plural interconnected net pins. The surface is divided into a first set of pre-defined areas, and routing optimization is performed independently in each of the pre-defined areas in the first set. The surface is divided into a second set of pre-defined areas, and routing optimization is performed independently in each of the pre-defined areas in the second set. It is a feature of this aspect of the invention that each of plural pre-defined areas in the first set overlaps at least two pre-defined areas in the second set, and each of plural pre-defined areas in the second set overlaps at least two pre-defined areas in the first set.
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