Mature 8-inch Wafers See Resurgence for AI Systems

While major foundries like TSMC and Samsung are trimming their 8-inch production to focus on more advanced nodes, this is tightening the overall supply. This reduction in capacity, just as demand rebounds, is restoring pricing power to the once-overlooked 8-inch process segment. Some foundries have already notified customers of planned price increases ranging from 5% to 20%. The global 8-inch silicon wafer market is projected to grow from US$3.126 billion in 2024 to US$4.477 billion by 2032, reflecting a compound annual growth rate of 6.9%. In response to this demand, 13 new 200mm production lines are expected to come online between 2025 and the end of 2028. The Asia-Pacific region, with its strong semiconductor manufacturing ecosystems in Taiwan, South Korea, and China, continues to dominate the market. This trend is not limited to traditional silicon, as the industry is also seeing a significant shift toward 8-inch silicon carbide (SiC) wafers, crucial for next-generation power electronics in electric vehicles and renewable energy. Companies like STMicroelectronics, Infineon, and Wolfspeed are investing heavily in new 8-inch SiC fabs, with at least 14 new facilities planned globally. The transition to 200mm SiC wafers can nearly double the number of chips per wafer, potentially reducing unit costs by up to 40%. The resurgence benefits not just foundries but also companies specializing in mature process technologies. The cost-effectiveness of 8-inch wafers makes them ideal for producing a wide range of components, including analog devices, RF components, and MEMS, which are essential for the automotive, industrial, and consumer electronics sectors. This allows companies to utilize existing, fully depreciated manufacturing equipment, avoiding the massive capital investment required for leading-edge 12-inch fabs.