A hybrid hierarchical approach for multi-layer global routing

In this paper, we propose a hybrid hierarchical global router for multi-layer VLSI´s, which executes routing and layering simultaneously. This novel approach, a hybrid hierarchical global router, is a combination of a topdown and a bottomup hierarchical routers, and resolves defects of a naive topdown approach. We also show experimental results, which demonstrate the superiority of the hybrid hierarchical approach