How Far Left Can You Shift?


More steps in the design flow are shifting left, which makes a complicated design process even more complex. This includes early software prototyping, workload mapping, verification, multi-physics integration, verification, IP qualification. Frank Schirrmeister, executive director of strategic programs for System Solutions at Synopsys, talks about the increasing number of steps, the potential t... » read more

UCIe vs. BoW: Practical Insights For Choosing The Right Chiplet Standards


As chiplet-based architectures gain traction across high-performance and cost-sensitive semiconductor applications, selecting the appropriate die-to-die interconnect standard has become a critical design decision. This white paper presents a practical, engineering-focused comparison of Universal Chiplet Interconnect Express (UCIe) and Bunch of Wires (BoW), highlighting their differing philosoph... » read more

How To Build Billions of Bumps


Key Takeaways: Hybrid bonding can result in a package containing billions (and eventually trillions) of connections. Building that many connections successfully requires extreme process uniformity across a wafer. Inspection isn’t practical, and test benefits from internal test mechanisms. Hybrid bonding allows unprecedented signal pitch, but fully populating dies and inter... » read more

Co-Packaged Optics Testing Faces Steep Data Center Ramp


Key Takeaways: Device interface board must balance flexibility in handling with customization for different optical connectors. Test fixtures should account for DUT socketing challenges, such as warpage, coupling, and interference. Advanced data management practices will help speed yield learning. Integrating photonic and electrical ICs into co-packaged optics (CPO) requires... » read more

The Evolution Of UCIe


Since it was released in March 2022, the Universal Chiplet Interconnect Express (UCIe) has grown from a basic way of connecting two dies together into a comprehensive specification that can ensure the handoff of data between various components in an advanced package, as well as validate the chiplets within that package. Mayank Bhatnagar, director of product marketing at Cadence, talks about the... » read more

Swapping Out Chiplets: I/Os Vs. Compute


Key Takeaways: Companies can save time and money by swapping out a compute, memory, or I/O chiplet to gain technology improvements, while keeping the other dies stable. Chip architects may choose to keep their I/Os stable and swap out compute to move from a 5nm process node to 3nm to achieve performance and power improvements, or swap out memory from LPDDR5X to LPDDR6. Swapping out... » read more

Wafer-Scale vs. Chiplets: The New War? Part 1


Cerebras’ IPO is a meaningful moment for the semiconductor industry — and not just for the financial implications. Their confidence in their opening price reflects something the industry has effectively acknowledged: incremental chip scaling can no longer keep pace with what AI infrastructure demands. Radical approaches are earning serious consideration and serious capital. Cerebras... » read more

Side-Channel Risks Across 2.5D/3D Integration and Chiplet-Based Systems (Grenoble INP – UGA et al.)


Researchers from Grenoble INP - UGA, CNRS, TIMA have released “Spying Across Chiplets: Side-Channel Attacks in 2.5/3D Integrated Systems”. Abstract “Advanced packaging and chiplet-based integration are increasingly adopted to build complex heterogeneous systems beyond the limits of monolithic scaling. While these architectures offer major benefits in terms of modularity, yield, a... » read more

With Chiplets, What Role Does Economics Play?


Key Takeaways: For the data center, chiplet economics matter, but they’re not a primary decision-driver. With the exception of processor families, chiplets cannot address consumer markets today, where economics dominate. If a chiplet marketplace materializes, the economics may be friendlier because chiplets will have multiple customers and applications. Chiplets are notori... » read more

Confusion Grows With More Interconnect Options And Tradeoffs


Key Takeaways: Designers are frequently evaluating 5 or more different interconnects in a single system, each with a distinct purpose. While chip-to-chip (PCIe) and die-to-die (UCIe, BoW) technologies seem to be solving a similar problem, in practice they bring different challenges. PCIe, CXL, NVLink, and UALink are all active in the hyperscaler space, but Ethernet-based technologies... » read more

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