Exclusive: SK Hynix races to build Yongin memory megasite as supply crunch deepens

SK Hynix’s rush to complete its Yongin memory megasite is a defensive play against structural shortages in AI-driven HBM and DDR5. This move pressures upstream equipment makers like Tokyo Electron and Applied Materials to prioritize EUV and ALD tool allocation, squeezing mature-node foundries out of critical capacity. With tightening U.S.-ROK export controls, heavy reliance on American tech exposes SK to soaring compliance costs for China-bound sales. Samsung will likely counter by retooling Pyeongtaek P3 for HBM3E, while Micron leverages its strong earnings to lobby for stricter U.S. licensing. Over the next 18 months, a ‘capacity arms race’ will intensify—but surging capex combined with yield bottlenecks risks a mid-2027 oversupply shock, especially if AI server demand cools, hitting second-tier players hardest.