Commonwealth Fusion Systems (CFS), a leading fusion energy startup, has secured an $85 million investment from the U.S. government to enhance semiconductor technology tailored for fusion power plants. The funding comes through the Department of Commerce’s CHIPS Act program and aims to accelerate the development of resilient and efficient power electronics crucial for scaling fusion reactors beyond demonstration units. This move supports CFS’s goal of not only launching its Sparc fusion reactor next year but also establishing a sustainable supply chain for future commercial fusion power plants.

The grant will back five key initiatives, primarily focusing on advancing silicon carbide power electronics. These semiconductors, widely utilized in applications from electric vehicles to data centers, are essential in managing the high voltages inside fusion reactors, particularly for powering the superconducting magnets that confine plasma. By improving the durability and capabilities of these chips, CFS hopes to reduce operational costs and enhance reliability in fusion plant operations, addressing a critical challenge in transitioning fusion energy to a practical, long-term power source.

In addition to silicon carbide development, CFS plans to use the funding to innovate next-generation radio-frequency power generators that heat fusion fuel and design advanced electronics that can respond more quickly and endure harsh radiation environments within reactors. These advancements are expected to extend the lifespan of reactor components and facilitate the precise control necessary for efficient fusion reactions. Strengthening these technologies is vital for making fusion power plants more cost-effective and capable of integration into the electrical grid.

Lastly, part of the award will support adapting AI hardware like GPUs and TPUs for fusion applications, merging cutting-edge computational power with fusion technology development. CFS’s leadership, including co-founder and chief science officer Brandon Sorbom, emphasizes that this federal support will not only propel fusion energy closer to grid readiness but also bolster the U.S. semiconductor and power electronics industries. This dual focus aims to create economic and technological momentum for both clean energy innovation and domestic chip manufacturing capabilities.