SK hynix HBM Cooling Breakthrough: iHBM Cuts Thermal Resistance 30% for HBM5 - Tech Times

SK hynix announced its innovative iHBM (Integrated High Bandwidth Memory) technology on May 26, 2026, which reduces thermal resistance by over 30% by embedding proprietary cooling elements directly wi... Read original →

SK hynix’s iHBM isn’t just a thermal fix—it’s a preemptive redesign of AI chip physics. By embedding cooling directly into the HBM stack, it neutralizes the D2D PHY hotspot, enabling HBM5 to operate reliably at 230 kW/rack. This forces GPU vendors to rethink packaging co-design strategies (CoWoS vs. FOPLP). Leveraging existing MR-MUF processes slashes customer adoption cycles, but Samsung and Micron risk exclusion from NVIDIA’s Rubin Ultra supply chain if they lack equivalent solutions within 12 months. Crucially, iHBM avoids reliance on EUV or restricted tools, sidestepping U.S. export controls while strengthening Korea’s domestic materials and packaging ecosystem. Within 18 months, iHBM will become an invisible gatekeeper for AI data center memory, converting SK hynix’s technical edge into pricing power and further compressing rivals’ margins.