The cookie cutter algorithm for handling mixed hierarchy
ACM SIGDA Newsletter
Improving virtual-grid compaction through grouping
DAC '87 Proceedings of the 24th ACM/IEEE Design Automation Conference
A hierarchy preserving hierarchical compactor
DAC '90 Proceedings of the 27th ACM/IEEE Design Automation Conference
A new approach to hierarchical adaptation using sequence-control based on cell interactions
DAC '91 Proceedings of the 28th ACM/IEEE Design Automation Conference
VLSI layout compaction using radix priority search trees
DAC '91 Proceedings of the 28th ACM/IEEE Design Automation Conference
A new hierarchical layout compactor using simplified graph models
DAC '92 Proceedings of the 29th ACM/IEEE Design Automation Conference
Symbolic layout compaction review
DAC '88 Proceedings of the 25th ACM/IEEE Design Automation Conference
MCNC's vertically integrated symbolic design system
DAC '85 Proceedings of the 22nd ACM/IEEE Design Automation Conference
Auto-interactive schematics to layout translation
DAC '85 Proceedings of the 22nd ACM/IEEE Design Automation Conference
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A fully automatic hierarchical compactor has been developed to translate hierarchical, symbolic cell designs into artwork. The hierarchical compactor takes advantage of the fact that a typical hierarchical design uses the same cell in several different places. Each cell is first examined in all of its contexts. The leaf-cell compactor next compacts each leaf-cell to its minimum possible size in its worst-case environment. The last step is to abut instances of the cells according to the original symbolic layout; some grid line spacings may be increased to avoid breaking wires. The compactor is implemented as a set of rule-driven procedures that find all technology dependent information in technology description files. The result of this strategy is a technology-independent compactor that produces compact, error-free artwork.