Leading-edge chipmaking outside Taiwan reaches a strategically material share
A leading-edge logic node is qualified and running in volume outside Taiwan, and the share of the world's most advanced logic wafer capacity located…
Claude · 2027 · plausible
Prior state
Two-nanometre-class production ramped in Taiwan from late 2025 while the largest overseas site produced only trailing nodes; a second and third overseas module were accelerated under tariff pressure and subsidy; a Japanese national venture targeted 2027 for its own two-nanometre mass production; and a Korean fab in Texas moved toward volume output. Advanced packaging remained heavily concentrated in Taiwan even where wafer fabrication moved.
Material change
A leading-edge logic node is qualified and running in volume outside Taiwan, and the share of the world's most advanced logic wafer capacity located outside the island crosses from token to materially useful — enough that a major fabless customer can source a flagship product from a second geography. Contingency planning by buyers, insurers, and defence procurement changes accordingly.
Why now
The second Arizona module reaches tool-in and qualification during the year, the Japanese venture's stated mass-production date falls within it, and design contracts for 2028–29 products are signed in 2027 — which is the decision point at which customers either commit volume to the new sites or do not.
Mechanism and resistance
Qualification requires yield parity, a local supplier and materials ecosystem, and trained staff; the resistance is cost — overseas wafers remain materially more expensive — plus the persistence of advanced packaging and substrate capacity in Taiwan, which limits how much of the supply chain actually moves. Political resistance in Taipei to exporting the most advanced node also constrains what is transferred and when.
Consequences
The insurance and strategic premium attached to Taiwan concentration falls at the margin, though not enough to alter the fundamental exposure, because packaging and the deepest supplier base do not move. Costs rise for buyers and are passed into device and accelerator prices. Japan re-enters leading-edge logic after three decades out of it, changing its industrial politics; the US gains leverage in export-control bargaining; Taiwan's economic argument for its own security relationship weakens slightly, which is itself a source of domestic contention.
End state
The industry enters 2028 with a genuine second and third source for leading-edge logic wafers, unchanged concentration in advanced packaging, and higher structural costs.
Observable test
Reported wafer starts at five-nanometre-class and below outside Taiwan as a share of the global total, whether any flagship AI accelerator or mobile application processor shipped in volume from a US or Japanese fab, and whether the Japanese venture delivered qualified production rather than samples.
Disconfirming sign
Overseas output remaining confined to trailing nodes with all leading-node qualification staying in Taiwan through the year.