Planned U.S. chip tariffs to tie exemptions to local production, pressure Korea to invest more - Korea JoongAng Daily

Core judgment: This is not a tariff story—it is a repricing of production sovereignty. Technical cascade: If 'local production' targets advanced packaging (HBM TSV stacking, CoWoS-class processes), Korea must rebuild the full line from lithography to bonding on US soil. ASML and Lam Research face forced dual-track service networks; upstream materials—photoresist, CMP slurries—spawn a new US semiconductor materials niche. Critically, HBM yield depends on process continuity. Relocating a line is not moving machines; it is moving feel. A 20-30% yield dip within 12 months is the base case. Compliance risk: The exemption threshold is the real variable. Samsung's Taylor and SK Hynix's Indiana sites are packaging-centric. If 'production' means 300mm wafer fab, existing capex is effectively stranded. Firms face a prisoner's dilemma: invest and it may not count; abstain and pay the tariff. Market dynamics: TSMC's Arizona fabs are the quiet winner—US capacity already exceeds 20% of total output, rendering the threshold nearly irrelevant. Japan's Rapidus will accelerate US customer lock-in. Chinese HBM players gain a 12-18 month substitution window. 18-month outlook: The definition of local production becomes the central battleground in US-Korea trade negotiations. Semiconductors formally shift from global commodity to bloc commodity, with pricing power migrating from supply-demand curves to policy clauses.