CFS Gets $85M for Fusion Chips

Commonwealth Fusion Systems will receive $85 million from the U.S. government to build advanced semiconductors for the fusion power industry. The funding comes from a CHIPS Act award issued by the Department of Commerce. This federal grant also grants the government an equity stake in the company.

The startup plans to use the capital to strengthen research and development efforts. It will also expand domestic manufacturing capacity for chips. These resources aim to support the construction of commercial fusion plants across the country.

The award arrives as fusion startups race to complete their first demonstration machines. CFS aims to switch on its Sparc reactor sometime next year. While a single reactor serves as a proof of concept, building dozens of commercial plants requires more durable power electronics. It also demands a dependable supply chain for critical components.

Brandon Sorbom, co-founder and chief science officer at CFS, explained the strategy in a blog post. He stated that the goal is to create a more capable and economical power plant. This approach will also build a stronger U.S. supply chain to support construction.

The $85 million award directs funds toward five specific initiatives. The first effort focuses on advancing silicon carbide power electronics. These semiconductors manage high voltages and appear in products ranging from electric vehicles to data centers. They are also critical in fusion machines, where intense electricity bursts drive superconducting magnets to confine plasma.

A second initiative involves developing next-generation radio-frequency power generators. CFS uses these devices to heat fusion fuel. The company will also work on advanced electronics that allow for faster reactor control. These components are hardened against radiation to withstand the harsh environment inside a reactor.

Sorbom noted that radiation-hardened electronics could extend the lifespan of components. Longer-lasting parts would reduce operating costs for fusion power plants. This durability is essential for making the technology viable for commercial use.

The final initiative involves adapting artificial intelligence hardware for power plants. This includes modifying GPUs and TPUs for specific fusion applications. The company aims to integrate these tools into its systems to improve performance and efficiency.

Sorbom said the funding helps improve the U.S. chip and power electronics industries. At the same time, it accelerates fusion energy's progress toward the electrical grid. The company will use the resources to finalize its hardware roadmap for the coming years.