Taiwan AI suppliers ride global demand as substrate, and CCL markets tighten

The AI compute arms race has thrust Taiwan, China’s ABF substrate and high-end CCL suppliers into a structural boom. Technically, HBM3E and CoWoS packaging demand unprecedented layer counts and CTE control, forcing material vendors to rapidly adopt low-Dk resins and ultra-thin copper foils—creating formidable technical moats. Geopolitically, while U.S. CHIPS Act incentives boost near-term capacity utilization, export controls compel customers to diversify sourcing to Japan, Korea, or Southeast Asia, inflating compliance costs and eroding pricing power. In response to Unimicron and Nan Ya PCB’s lead, Ibiden and Samsung Electro-Mechanics may counter by co-developing bespoke solutions with NVIDIA or AMD. Over the next 18 months, as 2.5D/3D packaging penetration exceeds 40%, vertically integrated Taiwan, China-based players will capture peak margins—yet without overseas backup fabs operational by 2027, supply chain fragmentation risks will sharply amplify valuation volatility.