Why Multiphysics Matters for Chiplet Reliability

In the world of advanced electronics, the combination of semiconductors, artificial intelligence (AI), and software is pushing the boundaries of what’s possible. A key technology enabling this progress is the chiplet-based semiconductor. Instead of building one massive, complex chip, engineers combine several smaller, specialized chips—called chiplets—into a single package. This approach boosts performance, reduces power consumption, and lowers overall system cost. However, packing so much functionality into a tight space creates significant physical challenges. Heat, electrical interference, and mechanical stress can threaten reliability. To solve this, a comprehensive approach called multiphysics analysis has become essential. It’s no longer enough to check just one factor; designers must now analyze how electrical, thermal, electromagnetic, and mechanical forces interact simultaneously to ensure a robust final product.

Key Industries Driving the Need for Advanced Analysis

Not long ago, designs using multiple chips in one package seemed like a specialty. Today, they are becoming standard in high-performance applications, making multiphysics analysis a routine necessity.

AI Datacenters and High-Performance Computing

Modern datacenters, especially those powering AI workloads, are prime examples. A typical AI accelerator package might combine Central Processing Units (CPUs), Graphics Processing Units (GPUs)—which are notorious for high power use—and stacks of High-Bandwidth Memory (HBM). The immense heat generated can slow down performance or cause physical damage like warping, which can break tiny internal connections. Other risks include electromigration (a wear-out mechanism in metal wires) and power delivery issues that can lead to intermittent failures.

Electric and Traditional Vehicles

Electric vehicles (EVs) present a unique set of challenges. Power switches in EVs operate at very high voltages and frequencies, with temperatures inside the chip reaching up to 200°C. This intense heat creates thermal management hurdles similar to datacenters. Furthermore, the high-power operation can generate electromagnetic noise that interferes with the reliability of both the drivetrain and the cabin’s electronics systems. Across the entire automotive sector—including hybrid and internal combustion engine (ICE) vehicles—electronics must endure harsh conditions like vibration, humidity, and extreme temperatures for 15 to 20 years, far exceeding the lifespan expected of consumer gadgets.

Wireless Communication Infrastructure

The cellular towers that enable our mobile networks are built to last for decades. These systems face their own blend of multiphysics challenges. Multiple power amplifiers at the radio head generate significant heat, leading to thermal degradation. Advanced technologies like MIMO (Multiple-Input Multiple-Output) for beam management and integrated AI functions add to the complexity. Managing electromagnetic interference is also critical, as these systems handle numerous wireless signals simultaneously.

Industries driving global economic growth depend on the high performance and unwavering reliability of these multi-die systems. Achieving this reliability is impossible without thorough and efficient multiphysics analysis.

The Evolution from Isolated to Integrated Analysis

Engineers have long used tools to analyze individual physical effects. They can model heat flow, simulate electromagnetic waves, or calculate mechanical stress. However, in today’s complex chiplet-based packages, these phenomena do not occur in isolation.

A hot spot on a chip doesn’t just affect that area; it causes the entire package to expand and warp, which in turn stresses electrical connections and changes how signals travel. Electromagnetic interference can corrupt power delivery and data signals. The only way to accurately predict real-world behavior and ensure long-term reliability is through a full multiphysics analysis that studies all these interactions concurrently during the design phase.

Synopsys Leads with Unified Multiphysics Solutions

Following its acquisition of simulation leader Ansys, Synopsys has introduced its first suite of Multiphysics Fusion solutions tailored for chiplet and multi-die designs. This integration brings together best-in-class tools into a unified workflow.

For instance, the 3DIC Compiler platform now seamlessly incorporates:

• RedHawk-SC for dynamic analysis of power integrity.
• RedHawk-SC Electrothermal for dynamic thermal analysis.
• HFSS-IC for high-frequency electromagnetic simulation.

This unified environment allows for concurrent signoff on Electro-Magnetic-Interference and Reliability (EMIR), thermal behavior, signal integrity, and electromechanical stress. It provides the complete analysis suite needed to guarantee the longevity of advanced multi-die systems.

Tangible Benefits for Design Teams

The advantages extend beyond just ensuring a safe operating margin. According to a Synopsys press release endorsed by industry leaders like MediaTek, NVIDIA, and Samsung, these integrated solutions can accelerate IR-drop-aware Static Timing Analysis (STA) signoff by up to 3 times. More broadly, they can speed up the overall multiphysics design closure process by 10 times, both for individual chiplets and for the entire multi-die assembly. These efficiency gains also apply to integrating analog and photonic components into these advanced packages.

This advancement represents the promised synergy of the Synopsys and Ansys merger, delivering the sophisticated tools required to meet the relentless demands for performance and reliability in cutting-edge electronics. For those looking to dive deeper, Synopsys offers resources including a press release on the new solutions and eBooks covering Multiphysics Fusion for Multi-Die Designs and optimizing analog design with multiphysics.