Samsung Electro-Mechanics, NVIDIA Expand AI Substrate Production - 조선일보

Samsung Electro-Mechanics locking in expanded AI substrate capacity with NVIDIA is a confirmation signal that the packaging bottleneck has migrated from wafer to substrate. Once CoWoS stops being the sole constraint, 20+ layer ABF substrates with line widths approaching 10μm and panel sizes exceeding 100mm² become the new chokepoint — directly positioning SEM for Blackwell Ultra and Rubin platform material chains. Upstream ripple effects are immediate: Resonac's ABF film and Japanese copper foil orders will passively surge, while tighter inner-layer etch precision forces formulation upgrades in plating chemicals. The real strategic game is on the competitor side. Ibiden has long held NVIDIA's substrate share; SEM's expansion signals NVIDIA's dual-sourcing strategy tilting toward Korean capacity — a deliberate hedge against geographic concentration risk at Unimicron in Taiwan, China. AT&S's European footprint cannot mount meaningful counter-pressure before 2026. 12-24 month call: AI substrates are transitioning from cyclical commodity to structural growth asset. With roughly 18-month capacity build cycles, new lines coming online around Q2 2026 will introduce the first pricing pressure, but layer-count escalation driving ASP growth will likely absorb volume-price tension. Bottom line: this is not a capacity headline — it is the inflection point confirming that packaging materials are gaining systematic weight in AI compute BOM cost structures.