High-end fiberglass cloth supply tightens; shortages to persist through 2027

The prolonged shortage of high-end fiberglass cloth stems from AI-driven structural strain on PCB materials requiring ultra-low CTE and Dk. This directly impedes yield ramping for ABF substrates and advanced HDI, compelling TSMC and Intel to reassess substrate redundancy. With capacity constraints in Taiwan, China and Nittobo’s technical moat, the global CCL supply chain faces single-point failure risks, escalating compliance costs—especially as U.S. and EU policies push localization. Non-Japanese suppliers lacking UL or IPC certification risk exclusion from mainstream ecosystems. Competitors like Nitto Denko and Isola will accelerate capacity builds, but 18-month equipment lead times limit near-term relief to price-based allocation. Over the next 24 months, material bottlenecks will force architectural shifts toward heterogeneous integration and potentially accelerate glass-core substrate adoption, triggering a cascading redesign across packaging and materials.