Intel isn’t backing away from glass substrates for advanced chip packaging after all. At NEPCON Japan 2026, Intel Foundry demonstrated a new “Thick Core” glass substrate integrated with its EMIB (Embedded Multi-die Interconnect Bridge) technology, highlighting a packaging approach designed with data center and high-performance computing (HPC) workloads in mind.
This matters because recent industry chatter suggested Intel might have reduced its focus on glass substrates, especially following the departure of key personnel. Intel has long been viewed as an early mover in glass substrate research compared to much of the broader foundry ecosystem, so doubts about its commitment raised questions about whether the technology had been deprioritized. The latest showcase provides a clear answer: Intel is not only continuing development, it’s now demonstrating a real glass-substrate-plus-EMIB implementation.
So what did Intel show? The company says the new package approach enables a 2x reticle-size design in a 78 mm x 77 mm footprint. For advanced GPUs, AI accelerators, and other multi-chiplet designs, scaling beyond traditional limits is a major challenge—and packaging is often the bottleneck. A larger effective reticle area can make it easier to assemble more compute silicon into a single, tightly connected package.
Intel also shared details about the vertical stack design. The showcased build uses a 10-2-10 stack-up architecture: ten redistribution layers (RDLs) on top, a two-layer glass core in the middle, and ten bottom/build-up layers. Even with this dense construction, glass can support very fine wiring—one of the main reasons it’s being explored as a next-generation replacement for conventional organic substrates.
Another key point: Intel has already placed two EMIB bridges inside the package to link multiple compute dies. That’s an important signal that this isn’t just a materials demo. It’s a multi-die, multi-interconnect concept aimed at real-world chiplet-based products, where moving data quickly and efficiently between dies can determine overall performance.
The package markings and server-oriented design cues strongly suggest the target is server-grade hardware, including AI accelerators. In practical terms, glass substrates can bring several advantages that matter in big, power-dense packages: enabling finer interconnects, improving depth-of-field control during manufacturing, and reducing mechanical stress. These factors can become increasingly critical as AI chips evolve into “super-packages” with many chiplets working together.
EMIB itself has been gaining attention as the advanced packaging supply chain faces capacity constraints, and Intel appears eager to capitalize on that moment. By pairing EMIB with glass substrate innovation, Intel Foundry is positioning advanced packaging as both a technology differentiator and a potential growth engine—especially as demand surges for HPC and AI silicon that needs more compute in less space, with faster die-to-die connectivity.
