Synopsys Multiphysics Fusion Solutions

Timing signoff at advanced nodes must account for physical effects that directly influence transistor behavior. Voltage drop (IR drop), temperature variations, thermal mechanical and assembly stress and significantly impact timing, especially in high performance computing (HPC) and AI designs operating at extreme conditions.

Multiphysics Timing Signoff brings IR-aware, thermal-aware and stress-aware analyses directly into timing signoff, enabling engineers to:

• Evaluate timing with realistic power and temperature conditions
• Accurately model the delay impacts due to IR-drop and thermo-mechanical stress
• Reduce over conservative margins without sacrificing reliability
• Improve correlation between in design analysis and final signoff

The result is more robust timing closure, faster signoff turnaround, and optimized silicon performance.

At advanced nodes, dynamic voltage drop (IR drop), stress, and thermal effects become a leading limiter of timing, performance, and reliability. Rising resistance, higher frequencies, and escalating power density amplify IR and thermal effects - often surfacing late in the flow and driving costly ECO iterations.

Multiphysics Fusion integrates signoff-accurate voltage awareness directly into the design closure loop.  By leveraging RedHawk-SC Sigma insights, PrimeClosure enables surgical, timing-safe fixes that proactively resolve IR and thermal issues—eliminating the inefficiencies of traditional analysis-ECO-P&R cycles.

Key benefits and Proven Impact: 

• Signoff-accurate, in-design multiphysics closure (IR + thermal + timing)
• Up to 85% fewer IR violations with timing safe, PPA-optimized fixes 
• Up to 20x faster IR closure, saving multiple weeks in schedule 

By integrating multiphysics effects throughout the closure flow, teams achieve faster convergence, improved PPA, higher reliability, and more predictable tapeout outcomes.

Multi die design is foundational to modern HPC and AI systems, but it introduces new engineering challenges that span power, thermal, signal, electromagnetic and structural domains, and the interactions among them. Traditional chip centric tools cannot fully capture these cross-domain effects that blur the lines between chip and system and increasingly determine system performance, reliability, and manufacturability.

Multiphysics Fusion for multi-die design brings together multiphysics analysis and the full EDA stack in a unified exploration-to-signoff platform, enabling comprehensive analysis across the design lifecycle, including:

• Thermal simulation and optimization across dies, interposers, and board-level packaging
• Hierarchical power integrity signoff for entire multi-die designs, including microbumps, TSVs, and packaging effects 
• Efficient routing and signal integrity optimization for high-speed die-to-die interconnects, such as UCIe and HBM, informed by early parasitic prediction and trusted electromagnetic-aware analysis
• Consistent multiphysics analysis from prototyping through floorplanning and foundry-certified signoff
• Simulation of mechanical stress and warpage to evaluate lifecycle and reliability risks

By unifying multiphysics insight across dies, interposers, and packaging, engineering teams can reduce integration risk, accelerate schedules, and deliver more robust multi-die products at scale.

As modern chips integrate advanced high-speed interface PHYs to meet rising chip-to-chip data-rate and bandwidth demands—and as next-generation Wi-Fi and mobile standards continue to grow in complexity—analog, mixed-signal, and RF engineers need electromagnetic analysis that is accurate, trusted, and easy to use. To improve engineering productivity, multiphysics analysis must be seamlessly integrated into the design environment, together with highly accurate parasitic extraction, to support advanced RF simulation and signal and power integrity analysis from the earliest design stages through signoff.

Multiphysics Fusion brings advanced analog and electromagnetic analysis into a modern analog design environment, enabling engineers to:

• Simplify electromagnetic analysis and RF simulations by integrating multiphysics HFSS-IC solvers with the Synopsys Custom Compiler layout environment
• Perform intelligent passive components synthesis, producing editable PyCell devices in Custom Compiler layout and schematic environments
• Accurately capture on-chip high-frequency parasitics and layout-dependent effects that shape analog and mixed-signal behavior
• Detect electromagnetic-induced signal integrity, performance, and reliability issues earlier in the design cycle
• Achieve stronger correlation to final signoff for higher-confidence design decisions

By integrating highly accurate and high-capacity electromagnetic analysis solvers into the design and signoff flow, teams can push performance boundaries in analog, mixed‑signal, RF and high‑speed designs without sacrificing accuracy or schedule predictability.