The main bottleneck in the AI hardware race has officially shifted from advanced chips to the essential materials needed to connect them.
At the heart of this issue is the global AI infrastructure 'super-cycle'. As major tech companies, or hyperscalers, rush to build out their AI capabilities, the demand for powerful GPU servers has exploded. These next-generation servers require more sophisticated Printed Circuit Boards (PCBs), which in turn depend on higher-grade materials like ultra-low-loss Copper-Clad Laminates (CCLs). This technological step-up means that not only is more CCL needed, but a much higher quality of it is required, putting immense pressure on a supply chain that wasn't prepared for such an abrupt shift.
This demand shock is happening alongside a severe cost-push from raw materials. First, the price of copper, a fundamental component of CCL, hit record highs in early 2026. This directly increased the production costs for CCL manufacturers. Second, seeing the overwhelming demand and rising input costs, major CCL suppliers in Taiwan and China began implementing significant price hikes from March through April. For example, Taiwan Union Technology (TUC) announced price increases of up to 40% on some products.
These factors created a perfect storm, leading to the situation reported on May 4, 2026. Korean PCB makers are now facing a 'CCL crunch', where import prices have soared 74.5% in a year to over $20,000 per ton. The problem isn't just price; it's availability. Lead times have stretched to six months, and reports indicate that even massive preorders worth hundreds of billions of won cannot guarantee a delivery date. This scarcity has a cascading effect, delaying the production of AI servers and other advanced electronics.
In essence, the entire electronics supply chain, from raw copper to finished servers, is feeling the strain. What started with a shortage of high-end chips has now moved upstream to the foundational materials, signaling that the AI boom's impact is broader and deeper than many anticipated. The stock market has already reacted, with shares of CCL and PCB makers like Doosan and Samsung Electro-Mechanics surging dramatically over the past year.
- Glossary:
- CCL (Copper-Clad Laminate): A core material used to make printed circuit boards. It consists of a thin layer of copper foil laminated onto a non-conductive substrate, like fiberglass.
- PCB (Printed Circuit Board): The green board found inside most electronic devices, which uses conductive tracks to connect various electronic components.
- Hyperscaler: A term for very large-scale cloud computing providers that dominate the market, such as Amazon Web Services, Microsoft Azure, and Google Cloud.