Overview
- The company announced iHBM on May 26, 2026, describing a package-level design that places Integrated Cooling Elements (ICEs) inside next‑generation HBM to address a hotspot at the Die‑to‑Die Physical Layer (D2D PHY).
- ICEs are silicon-based pieces that conduct heat but not electricity, and SK hynix says placing them next to the D2D PHY opens a shorter heat‑dissipation path instead of relying on indirect cooling through the core die.
- SK hynix claims the architecture reduces thermal resistance by about 30 percent, which the company says will limit thermal throttling, help maintain peak data rates, and enable denser HBM stacking for AI and HPC workloads.
- The firm says iHBM can be built with its existing WLP process based on Mass Reflow Molded Underfill (MR‑MUF) and fits current System‑in‑Package layouts, but it has not disclosed a mass‑production timetable or named customers.
- The announcement arrives as customer demand for HBM outstrips SK hynix’s stated capacity and competition and packaging partners such as Samsung and TSMC shape the market; broad adoption will depend on customer validation, system integration, and the industry shift toward HBM5 around 2029–2030.