US critical materials $389M plan: quartz and fusion chips explained for engineers
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
The US Commerce Department plans up to $389 million in semiconductor and power technology funding, including $56 million for Sibelco to develop next‑generation ultra‑high‑purity quartz purification, a key bottleneck material for chip fabrication. Helion and Commonwealth Fusion Systems could receive $175 million and $85 million respectively for high‑voltage power semiconductors, RF plasma‑heating chips and radiation‑hardened electronics for fusion generators operating under extreme electrical and radiation loads, while Vertical Semiconductor may get $73 million for vertical gallium nitride devices for AI data centre racks. All awards are preliminary and tied to minority, non‑voting federal equity stakes.
Technical Brief
- Funding sits within a $10‑billion US federal semiconductor R&D programme authorised in 2022.
- Helion’s allocation targets power modules managing bidirectional flows to high‑field fusion magnets in its Polaris‑class generators.
- Commonwealth Fusion Systems’ package covers RF plasma‑heating chips, power conversion, diagnostics and radiation‑hardened control electronics.
- Vertical Semiconductor’s vertical GaN devices are aimed specifically at high‑density AI server rack power stages.
- Sibelco’s award is ring‑fenced for processing, not mining, focusing on ultra‑high‑purity quartz purification technology.
- Quartz purification upgrades are intended to meet extremely tight contamination limits that currently constrain domestic wafer‑grade supply.
- All four commitments are only at letter‑of‑intent stage, with no binding funding agreements yet executed.
- In exchange for capital, the US government receives minority, non‑controlling, non‑voting equity stakes in each recipient.
Our Take
The US Commerce Department also features in several recent pieces on record gold and critical minerals prices, signalling that this $10 billion semiconductor R&D framework is being watched by markets as part of a broader US industrial policy push that affects sentiment across copper and other base metals.
Funding for Sibelco’s ultra-high-purity quartz processing positions quartz alongside lithium, cobalt and rare earths in our Materials coverage as a quietly critical input for advanced chips, which may tighten specifications and qualification hurdles for future quartz and silica suppliers to US fabs.
Backing fusion-focused firms Helion and Commonwealth Fusion Systems with dedicated critical materials funding suggests Washington is starting to treat long-lead energy technologies as part of the same strategic resource ecosystem as nickel and copper, which could pull more upstream mining projects into energy-security narratives rather than purely climate-policy ones.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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