Federal Funding: CFS to Build Fusion Reactor Chips

Commonwealth Fusion Systems will spend $85 million to manufacture specialized semiconductors for fusion power plants. The funding was announced on Thursday and will be used to build chips that can withstand the extreme conditions inside a reactor.

The Department of Commerce issued the award under the CHIPS Act. The agreement includes a government equity stake in the company. CFS stated that the capital will expand domestic manufacturing capacity and support research and development.

The money will support five specific technical initiatives. The primary focus is the advancement of silicon carbide power electronics. These components manage high voltages in applications ranging from electric vehicles to data centers. In fusion machines, they drive the superconducting magnets that confine plasma.

CFS also plans to develop next-generation radio-frequency power generators. These devices heat fusion fuel to the temperatures required for reaction. A separate effort targets advanced control electronics that are hardened against radiation. The company said these radiation-resistant components could extend the lifespan of hardware inside a power plant and lower operating costs.

The final initiative involves adapting AI hardware, including GPUs and TPUs, for use in power plant operations. Brandon Sorbom, co-founder and chief science officer at CFS, noted that the funding will improve U.S. chip and power electronics industries while accelerating fusion energy's progress toward the electrical grid.

The award arrives as fusion startups race to finish their first demonstration machines. CFS aims to activate its Sparc reactor in 2027. A single reactor serves as a proof of concept, but commercial deployment requires durable electronics and a reliable supply chain. Sorbom wrote that the goal is a more capable and economical power plant built on a stronger U.S. supply chain.