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《Chinese Journal of Semiconductors》 1988-06
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DRAFT——An Efficient Area Router Based on Global Analysis

Ying Changsheng/Dept. of Computer Science & Technology,Tsinghua University, BeijingHong Xianlong/Dept. of Computer Science & Technology,Tsinghua University, BeijingWang Erqian/Dept. of Computer Science & Technology,Tsinghua University, Beijing  
A new area router-DRAFT is presented.Based on a global optimal analysis of nets.DRAFT is capable of routing switchboxes and channels.It partitions the detailed routing intotwo steps:directional routing and final routing.Directional routing functions as a loose routingin the routing area and evaluates the ideal position of each net.Its results will guide the finalrouting procedure.Final routing actually routes the area.DRAFT is a grid-based routerusing two interconnection layers.It relaxes the unnecessary constraints of assigning differentlayers to different directions.Expcrimental re-sults are quite encouraging Optimal results areobtained in most cases for both switchbox and channel routing in published literatures.
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