Lattice Materials Montana silicon–germanium plant: capacity and supply-chain notes for engineers
Reviewed by Tom Sullivan

First reported on MINING.com
30 Second Briefing
US silicon and germanium producer Lattice Materials has broken ground on an 80,000-square-foot manufacturing facility in Bozeman, Montana, backed by an $18.5 million US Department of War investment to expand domestic photonics-grade optical materials capacity. Scheduled to start construction in May 2026 and complete in 2027, the plant will more than double Lattice’s footprint and add large optical boule growth, expanded internal processing, and higher-precision machining and metrology. New recycling lines will convert scrap into seed crystals, cutting reliance on imported silicon and germanium feedstock.
Technical Brief
- Facility is owned by Lattice Materials, a silicon and germanium specialist within The Partner Companies group.
- US Department of War funding totals $18.5 million, directly targeted at critical optical materials capacity.
- Plant is positioned to supply aerospace, defence and advanced imaging sectors requiring tight optical tolerances.
- New boule growth lines are intended to be the largest optical-capacity units currently available in North America.
- Expanded in-house machining and metrology aim to tighten dimensional control and reduce subcontracting of finishing steps.
- Recycling flowsheets will convert internal scrap into seed crystals, closing material loops for silicon and germanium.
Our Take
Within our 49 Materials stories, silicon and germanium appear far less frequently than battery metals like graphite and lithium carbonate, signalling that this Montana build could position Lattice Materials in a relatively uncrowded but strategically important niche for semiconductor-grade inputs in North America.
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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