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Techniques for multilayer channel routing

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7 Author(s)
Braun, D. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Burns, J.L. ; Romeo, F. ; Sangiovanni-Vincentelli, A.
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The techniques described have been implemented in a multilayer channel router called Chameleon. Chameleon consists of two stages: a partitioner and a detailed router. The partitioner divides the problems into two-layer and three-layer subproblems such that global channel area is minimized. The detailed router then implements the connections using generalizations of the algorithms used in YACR2 (see ibid., vol.CAD-4, no.3, p.208-19, 1985). In particular, a three-dimensional maze router is used for the vertical connections; this methodology is effective even when cycle constraints are present. Chameleon has produced optimal results on a wide range of industrial and academic examples for a variety of layer and pitch combinations, and can handle a variety of technology constraints

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:7 ,  Issue: 6 )