Commonwealth Fusion Systems Secures $85M to Advance Fusion Power Semiconductors

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Commonwealth Fusion Systems received $85 million from the U.S. government to develop durable, advanced semiconductors necessary for commercial fusion power plants.

Commonwealth Fusion Systems (CFS), a leading fusion energy startup, announced it will receive an $85 million award from the U.S. Department of Commerce as part of the CHIPS Act initiative. This investment aims to accelerate the development and manufacturing capacity of advanced semiconductors critical to fusion power plants in the United States.

CFS is currently targeting its Sparc fusion reactor to come online next year as a key demonstration of fusion technology. However, to move beyond a single experimental reactor to the commercial scale deployment of fusion power plants, robust and durable power electronics are essential. The CHIPS Act funding supports CFS's efforts in enhancing the semiconductor supply chain and advancing technologies to meet these needs.

Specifically, the funding will support five key initiatives. First, CFS will focus on advancing silicon carbide power electronics, which are vital for handling high voltages in fusion reactors. These semiconductors already play roles in various applications, including LEDs, electric vehicles, cell tower base stations, and data centers. In fusion plants, such electronics help drive the superconducting magnets that confine plasma.

Additionally, CFS will develop next-generation radio-frequency power generators critical for heating fusion fuel. The company also plans to create advanced electronics capable of faster reactor control and radiation hardness, potentially extending the operational lifespan of equipment and reducing maintenance costs.

Another focus area is adapting AI hardware, such as GPUs and TPUs, for use in fusion power plants, enabling enhanced data processing and control capabilities.

Brandon Sorbom, CFS co-founder and chief science officer, emphasized that this funding not only strengthens the U.S. semiconductor and power electronics sectors but also advances fusion energy's progress toward integration with the electrical grid. With this support, CFS aims to deliver more capable and cost-effective fusion power plants backed by a resilient domestic supply chain.