POSTECH Stacks Semiconductor Chips One-Fifth the Thickness of a Hair in 10 Layers, Achieving 4x the Density of HBM - finance.biggo.com

South Korean researchers have achieved a significant breakthrough in semiconductor chip stacking technology, successfully developing stable stacking of ultra-thin chips just one-fifth the thickness of... Read original →

POSTECH’s 10-layer stacking of chips—each just one-fifth the thickness of a human hair—shatters current HBM density ceilings. Technically, this forces rapid evolution in TSV and hybrid bonding processes, potentially redefining memory-wall strategies for AI accelerators. From a compliance angle, South Korea enhances its advanced packaging autonomy, reducing reliance on U.S. and Japanese tools—but likely provoking tighter BIS export controls on critical deposition and metrology equipment. In market dynamics, SK hynix may integrate this first to defend its HBM leadership, while Micron and Samsung accelerate alternative CoWoS-like platforms, and TSMC could restrict access to its 3D Fabric stack. If yield exceeds 70% within 12–24 months, AI server memory subsystems will require full redesign, catalyzing tight compute-memory integration and widening the generational gap between South Korea and Taiwan, China in high-end memory.