Authors: ZhongDong Qi YiCi Cai Qiang Zhou
Publish Date: 2015/05/01
Volume: 30, Issue: 3, Pages: 614-628
Abstract
As technology advances there is a considerable gap between the congestion model used in global routing and the routing resource consumption in detailed routing The new factors contributing to congestion include local pin access paths vias and various design rules In this paper we propose a practical congestion model with measurement of the impact of design rules and resources consumed by vias and local pin access paths The model is compatible with path search algorithms commonly used in global routing Validated by fullflow routing this congestion model correlates better with real resource consumption situation in detailed routing compared with previous work It leads to better solution quality and shorter runtime of detailed routing when it is used in the layer assignment phase of global routing stage
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