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

SK hynix unveiled its innovative iHBM (Integrated High Bandwidth Memory) technology on May 26, 2026, addressing a persistent performance bottleneck in high-bandwidth memory (HBM) used in AI data cente... Read original →

SK hynix’s iHBM isn’t just a thermal fix—it’s a strategic redefinition of the AI memory hierarchy. By embedding cooling at the D2D PHY layer, it sidesteps the need for GPU redesigns amid NVIDIA’s 230kW rack power targets, compressing time-to-market for next-gen accelerators. Samsung and Micron, still reliant on conventional TSV stacks with external heat spreaders, risk falling into a performance-yield trap during the critical HBM5 ramp window before mid-2027. Crucially, iHBM leverages existing MR-MUF infrastructure, avoiding EUV-related yield pitfalls in 3nm interconnects—a major advantage under tightening U.S.-China semiconductor equipment controls. Within 18 months, thermal constraints will dictate AI chip architecture more than raw compute, shifting bargaining power from logic vendors to memory leaders. This marks SK hynix’s bid to reclaim centrality in the AI value chain.