Tesla AI5 ignites Samsung-LG race for ABF substrates, robot parts

Tesla’s AI chip demand for high-density ABF substrates is forcing Japanese and Korean material suppliers to accelerate development of low-CTE, high-layer-count FC-BGA laminates—raising technical barriers for upstream BT resins and copper foils while pushing equipment makers to upgrade laser drilling and plating processes. LG Innotek’s potential entry into Tesla’s supply chain offers validation but exposes it to U.S. CHIPS Act scrutiny, potentially eroding over 10% gross margin through compliance costs. Samsung Electro-Mechanics, already embedded in NVIDIA’s H100 ecosystem, will likely counter by locking in TSMC’s CoWoS capacity. Within 18 months, ABF substrate shortages will become the critical bottleneck in AI hardware scaling, pressuring second-tier players like Ibiden and Shinko to license technology—or risk obsolescence—as Tesla may fast-track in-house packaging solutions.