Congestion and Power Integrity Aware Placement and Routing for 3D Packaging

TLDR: This work integrates noise analysis and decap estimation in the floorplanning process and uses the global routers results directly to estimate congestion and tight couple global routing with floorplaning to get a better area/congestion tradeoff.

Abstract: One of the major concerns for a 3-D package is to deal with power supply noise. Decoupling Capacitances (decap) allocation is a powerful technique to suppress power supply noise. In this work we integrate noise analysis and decap estimation in the floorplanning process. We also use the global routers results directly to estimate congestion and tight couple global routing with floorplanning to get a better area/congestion tradeoff. Our experiments prove the quality of our approach. We obtain improvements in both decap amount and congestion with only small increase in area, wirelength and runtime.