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The Magic VLSI Layout System

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5 Author(s)
Ousterhout, J.K. ; University of California, Berkeley ; Hamachi, G.T. ; Mayo, R.N. ; Scott, W.S.
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Magic is a new IC layout system that includes several facilities traditionally contained in separate batch-processing programs. Magic incorporates expertise about design rules, connectivity, and routing directly into the layout editor and uses this information to provide several unusual features. They include a continuous design-rule checker that operates in background and maintains an up-to-date picture of violations; a hierarchical circuit extractor that only re-extracts portions of the circuit that have changed; an operation called plowing that permits interactive stretching and compaction; and a suite of routing tools that can work under and around existing connections in the channels. A design style called logs and a data structure called corner stitching are used to achieve an efficient implementation of the system.

Published in:

Design & Test of Computers, IEEE  (Volume:2 ,  Issue: 1 )