Silicon carbide, as the core of third-generation semiconductor materials, has become a key material for high-end equipment such as new energy vehicles, 5G base stations, and energy storage systems due to its excellent characteristics of high temperature resistance, high breakdown field strength, and low loss. Especially semi insulating silicon carbide single crystals are the "essential materials" in cutting-edge fields such as high-end RF devices, AR glasses, AI chip heat dissipation modules, etc. Upgrading from 8-inch to 12 inch technology not only increases the output of single-chip chips by 2.5 times, but also achieves significant benefits of reducing unit costs by 40%.

The technological breakthrough of Keyou Semiconductor this time is not accidental, but based on a mature 8-inch technology system, achieved through four core technological innovations: Innovation One Flexible Crystal Growth Equipment Keyou's independently developed crystal growth furnace breaks the limitations of traditional equipment's "one size, one model", achieves compatible production of multiple sizes such as 12 inches and 8 inches, and can flexibly switch between conductive and semi insulating crystal production modes. It is beneficial for material companies to quickly adjust their product structure according to market demand, significantly reducing equipment investment and operating costs. The innovative second thermal field collaboration technology improves equipment sealing and effectively controls temperature gradients during crystal growth through high-precision mechanical cavity design and multi temperature zone thermal field design. Combined with the crucible structure design of Keyou Semiconductor's heat and mass transfer synergy, it solves the problems of warping, slow growth rate, and stress concentration that are prone to occur in large-sized crystals. Innovation Three Full Process Automation upgrades the automation technology for 8-inch mass production verification, integrating advanced algorithms and intelligent control systems to achieve precise control of key parameters and "one click start" operation, greatly improving production efficiency and product consistency, laying a solid foundation for stable production and subsequent quality improvement of 12 inch single crystals. Innovation Four Efficient Technology Iteration is based on the full chain industrialization experience of 8-inch equipment and substrates. Through technology transfer and process upgrading, including the application of tantalum carbide coating, new seed crystal fixation method, powder pretreatment and other key technologies, the core technical problems of 12 inch preparation, including single crystal cracking and edge polycrystalline, have been quickly overcome, demonstrating a clear technological development path and huge technological potential.

Keyou Semiconductor's breakthrough coincides with a critical juncture in the development of the industry. With international giants such as TSMC and Infineon accelerating the layout of 12 inch silicon carbide production lines, the global demand for large-sized semi insulating silicon carbide materials continues to rise.
This technological breakthrough by Keyou provides independent and controllable material selection for strategic emerging industries such as new energy and AI in China, effectively reducing the risk of industry chain bottlenecks and providing strong support for downstream enterprises to reduce costs and increase efficiency.
From the breakthrough of the 8-inch pilot line, to the breakthrough of the conductive 12 inch single crystal, and to the successful preparation of the semi insulating 12 inch single crystal, this series of breakthroughs not only significantly enhances Keyou's voice in the global silicon carbide industry, but also injects new momentum into the development of China's high-end semiconductor materials industry. Innovation leads the future, and Keyou Semiconductor will continue to deepen its cultivation of third-generation semiconductor material technology, contributing more "Keyou strength" to the development of China's semiconductor industry!