Honam Semiconductor Fab Urged to Preemptively Manage Water Like Kumamoto - 조선일보

Water is quietly becoming the binding constraint on advanced-node fabs, eclipsing even energy costs. A single 300mm facility consumes on the order of 100,000+ tonnes of ultrapure water daily, with over 70% dedicated to wafer cleaning cycles. A supply interruption doesn't merely halt production—it contaminates wafers mid-process with chemical residues, converting a downtime event into a yield catastrophe. The Honam region's structural competition between agricultural, municipal, and industrial water demand makes this a persistent risk, not an episodic one. The Kumamoto precedent is instructive: the lesson is pre-emptive capital allocation for closed-loop water recycling before capacity ramp-up, not crisis response. The supply-chain ripple is non-trivial. Upstream, ultrapure-water treatment vendors will see order books shift decisively toward zero-discharge architectures. Downstream, packaging and assembly operations sharing the same regional water grid lose operational elasticity. Strategically, if Honam fabs face tightening allocation quotas, production weighting will drift toward Kumamoto and Arizona—not as a capacity shift but as a re-ranking in customers' supply-chain redundancy models. Within 18 months, expect Seoul to introduce region-specific semiconductor water-quota regulations. Honam fabs will likely need an additional 15–25% capex for greywater recycling and rainwater capture. Firms that embed water-circularity metrics into their fab design specifications now will own the hidden cost moat for the next cycle.