AgenticECO: An Agentic Framework for ECO on 3D Integrated Circuits
AgenticECO is an evidence-gated tool-using agent workflow for 3D-IC engineering change orders (ECO) on the open-source TaiWei flow, paired with EcoRoute, a minimal-disturbance ECO-routing layer. Across nine matched natural defect cases under identical budgets, AgenticECO clears seven versus two for both full reroute and stock repair, at 0.66% mean disturbance over cleared cases and zero clock nets touched. A cross-backbone rerun under the same sealed contract clears all nine. Controlled studies show repair moves are necessary under preservation, occupancy-aware choice buys legal landings rather than repair success, and under tightened clocks minimal disturbance flips accept versus reject.
As Moore's law slows, the industry turns to three-dimensional integration, but merged 3D-IC flows expose bond-level defects with no 2D analogue, and post-route ECO remains manual and expertise-bound. AgenticECO, an evidence-gated agent workflow for 3D-IC ECO on the open-source TaiWei flow, uses EcoRoute, a minimal-disturbance ECO-routing layer, to make repairs attributable to their edits. In nine matched natural defect cases under identical budgets, AgenticECO clears seven versus two for both full reroute and stock repair, with 0.66% mean disturbance and zero clock nets touched. A cross-backbone rerun clears all nine. Controlled studies show repair moves are necessary under preservation, occupancy-aware choice buys legal landings, and minimal disturbance flips accept versus reject under tightened clocks.
AgenticECO combines an evidence-gated agent workflow with a minimal-disturbance ECO-routing layer (EcoRoute) that drives an unmodified pinned router, enabling attributable repairs. The approach achieves higher clearance rates (7/9 vs. 2/9) with only 0.66% mean disturbance and zero clock net touches. Controlled studies reveal that occupancy-aware choice secures legal landings but not necessarily repair success, and minimal disturbance becomes critical under tightened clock constraints.
This work addresses a critical bottleneck in 3D-IC design flows, where manual ECO processes limit yield and time-to-market. By automating ECO with an agentic framework, it reduces reliance on expert designers and could accelerate adoption of 3D integration in semiconductor manufacturing. The open-source TaiWei flow integration suggests potential for community-driven improvements and broader industry validation.
AgenticECO could reduce ECO turnaround time and engineering costs for 3D-IC designs, improving yield and accelerating product schedules. Its minimal-disturbance routing preserves design integrity, potentially lowering respin risks. As 3D integration becomes mainstream, automated ECO solutions may become a competitive differentiator for EDA vendors and semiconductor companies.
Next signals include replication on industrial 3D-IC designs, integration with commercial EDA tools, and extension to other post-route optimization tasks. The framework's evidence-gated approach may inspire similar agentic workflows for other complex physical design problems. Adoption by foundries or design houses would validate its practical impact on yield and turnaround time.