Multilevel routing with antenna avoidance
Proceedings of the 2004 international symposium on Physical design
Coupling aware timing optimization and antenna avoidance in layer assignment
Proceedings of the 2005 international symposium on Physical design
Proceedings of the 2006 international symposium on Physical design
Optimizing the antenna area and separators in layer assignment of multi-layer global routing
Proceedings of the 2012 ACM international symposium on International Symposium on Physical Design
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As semiconductor technology enters the deep submicron era, reliability has become a major challenge in the design and manufacturing of next generation VLSI circuits. In this paper we focus on one reliability issue - the antenna effect in the context of 3-layer channel routing. We first present an antenna effect model in 3-layer channel routing and, based on this, an antenna effect cost function is proposed. A layer reassignment approach is adopted to minimize this cost function and we show that the layer reassignment problem can be formulated as a network bipartitioning problem. Experimental results show that the antenna effect can be reduced considerably by applying the proposed technique. Compared with previous work, one advantage of our approach is that no extra channel area is required for antenna effect minimization. We show that layer reassignment technique can be used in yield-related critical area minimization in 3-layer channel routing as well. The trade-off between these two objectives is also presented.