Presentation
Cognitively Guided EM-Aware Routing Approach for Efficient Layout Implementation
DescriptionElectromigration (EM) and resistance constraints are traditionally verified at sign-off, making routing electrically blind and leading to costly post-layout iterations. This paper introduces a simulation-driven routing (SDR) methodology that integrates electrical intent into the layout process, enabling EM-correct-by-construction routing. The proposed approach leverages average current datasets from circuit simulation or design intent (DI) set in schematic database to dynamically guide routing decisions. For optimal routing the automation implements customizable trunk stacking across multiple metal layers, optimized trunk widths for area efficiency, and uniform via distribution to minimize resistance. SDR supports configurable stacking strategies—Auto, Trunk, and Custom—allowing full user control through SKILL-based modifications for scalability across nodes. Visualization of current distribution further enhance topology optimization. Implemented on a 28nm analog design, the methodology achieves routing quality equivalent to golden reference while reducing EM sign-off iterations and manual effort. Results demonstrate 30% faster turnaround, zero area wastage, and improved reliability without compromising design integrity. This framework addresses critical pain points in conventional flows and provides a scalable solution for high-current nets in both mature and advanced technologies.
Event Type
Engineering Poster
TimeTuesday, July 285:00pm - 6:00pm PDT
LocationDAC Pavilion, Exhibit Floor