SK Hynix Launches iHBM Thermal Solution

According to SK hynix, the company has announced the iHBM solution equipped with an Integrated Cooling Element (ICE), designed for next-generation High Bandwidth Memory (HBM) packaging to address the growing thermal challenges in AI-driven computing environments.

According to the announcement, the Integrated Cooling Element (ICE) is a thermally conductive, electrically insulating silicon-based material engineered to create additional heat dissipation pathways within HBM packages. It is specifically designed to improve thermal efficiency in high-power-density memory systems used in artificial intelligence (AI) and high-performance computing (HPC).

As HBM technology continues to advance, thermal management has become a critical bottleneck, driven by increasing data processing demands in AI workloads. Efficient power density control in the chip-to-chip physical layer (D2D PHY), which connects HBM stacks with AI accelerators such as GPUs, is now a key determinant of next-generation HBM competitiveness.

With its iHBM solution, SK hynix introduces a structural approach to thermal optimization. Traditional HBM designs rely on indirect cooling paths to dissipate heat across the package. In contrast, iHBM places the ICE directly in the high-heat D2D PHY region, creating a dedicated and localized heat dissipation channel. This innovation reduces thermal resistance by approximately 30%, enabling more stable operation even under high thermal and power stress conditions.

A key advantage of SK hynix is its advanced mass production capability. Based on its wafer-level packaging (WLP) technology and the proven MR-MUF (Mass Reflow Molded Underfill) process, the company enables stable, high-volume manufacturing of iHBM-enabled products. In addition, the solution is highly compatible with existing System-in-Package (SiP) architectures, allowing customers to adopt the new thermal design with minimal changes to system-level integration.

By integrating iHBM into next-generation HBM products, including HBM5, SK hynix aims to enhance the stability and efficiency of AI data centers and HPC systems operating in increasingly dense, high-bandwidth environments.

SK hynix Executive Vice President and Head of PKG Development, Kanguk Lee, stated that iHBM represents an optimal thermal management solution combining advanced memory design and packaging technology. He added that the company will strengthen its leadership in AI memory by proactively delivering solutions that meet the evolving requirements of AI computing environments.