Semiconductor roadmap shift
Industry R&D is pivoting from pure transistor scaling to advanced packaging, interconnects and heterogeneous integration—changes that will shape future SoC performance envelopes and software optimization priorities. (ico-optics.org)
ICO Optics’ briefing names glass substrates, UCIe and CXL as the three accelerants steering R&D away from pure node scaling toward package-level system design (ICO Optics, published Mar 17, 2026). (ico-optics.org) The UCIe Consortium published a 3.0 specification in August 2025 that raises die‑to‑die rates to 48 GT/s and 64 GT/s per lane to support higher-density chiplet fabrics. (uciexpress.org) UCIe’s governance includes more than 130 member companies — Intel, AMD, Arm, Google Cloud, Meta, Microsoft, NVIDIA, Qualcomm, Samsung and TSMC are named backers — and the group moved from 1.1 (Aug 2023) to a 2.0 manageability stack (Aug 2024) before the 3.0 data‑rate update. (photonics.com) Compute Express Link (CXL) has formalized multi‑host fabrics and cache‑coherent memory semantics in CXL 3.0, adding fabric-attached memory, multi‑level switching and constructs that the consortium and analysts say can enable a single fabric to attach thousands of hosts (specs and analyst briefings). (computeexpresslink.org) Foundry and OSAT capacity is already shifting investment: TrendForce reported NVIDIA secured roughly 70% of TSMC’s CoWoS‑L advanced‑packaging capacity for 2025 amid a >20% quarterly shipment rise, while Intel’s Foveros Direct 3D briefs describe vertical die stacking with face‑to‑face bonding and microbump pitches down to ~36 μm. (trendforce.com) Materials and optics moves track the same pivot: Yole and IDTechEx published 2025 reports forecasting rapid glass‑interposer and glass‑core substrate uptake for AI/HPC packages, while co‑packaged optics demonstrations and market studies cite 30–50% power savings vs. pluggable optics as a driver for CPO adoption in data centers. (yolegroup.com) Software and firmware stacks are adapting in lockstep: UCIe explicitly defines a software model and compliance flow for die‑to‑die interoperability, Linux kernel trees have added CXL drivers and features (kernel docs and 6.9/6.x commits) that require BIOS/EFI, early‑boot and OS coordination to present pooled or attachable memory as NUMA nodes. (uciexpress.org)
