Diamond Foundry Inc. CEO Martin Roscheisen announced on November 6, 2026, the creation of a 200mm single-crystal diamond. This D200mm crystal was shown unpolished directly from the growth process, marking a major milestone for the company's scaling efforts.
The D200mm wafer is a true single-crystal diamond, not an assembly of smaller pieces or a polycrystalline structure. It represents 25 years of scaling research by Stefan Gsell and Martin Fischer, who focused on growing large-scale crystals for industrial use.
Diamond Foundry is developing these crystals for semiconductors and advanced technologies. Diamond's unique combination of thermal conductivity, mechanical strength, and electrical insulation makes it a critical material for future high-tech applications.