Hierarchical routing method and apparatus that use diagonal routes
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United States of America Patent
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-
Jul 4, 2006
Grant Date -
Jan 23, 2003
app pub date -
Dec 7, 2001
filing date -
Dec 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Some embodiments provide a hierarchical routing method that uses diagonal routes. This method routes a net within a particular region of an integrated circuit ('IC') layout. This net includes several pins in the region. The method initially partitions the particular IC region into a first set of sub-regions. It then identifies a first route that connects a group of first-set sub-regions that contain the net's pins. The identified first route has an edge that is at least partially diagonal. The method next partitions the first-set sub-regions into a second set of smaller sub-regions. It then propagates the first route into the second-set sub-regions.
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