Breakthrough culminates 25 years of scientific pursuit and establishes a new scale for single-crystal diamond SAN FRANCISCO, Nov. 8, 2026 /PRNewswire/ — Diamond Foundry Inc. today announced a major milestone in the history of materials technology: the creation of the first-ever D200mm single-crystal diamond, measuring 200 millimeters in diameter. The achievement marks a fundamental step forward in humanity’s ability to manufacture diamond as a technology material at semiconductor-relevant scale. The announcement accompanies a keynote by Diamond Foundry CEO Martin Roscheisen, delivered by video at CarbonSemi 2026 in Ningbo, China. Watch the keynote: https://youtu.be/ae0XQBDlLMQ. Diamond has long been recognized as an […]

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