Diamond Foundry creates world's first 200mm single-crystal diamond wafer

What happened

Diamond Foundry announced the world's first 200mm single-crystal diamond (SCD) wafer. The company says diamond is suited for semiconductor cooling due to its thermal conductivity (estimated at least five times that of copper), especially given the enormous thermal problems caused by increasing AI chip power. What distinguishes the 200mm SCD from other lab-grown diamonds is that it is created as a high-quality single-crystal piece rather than a polycrystalline gem, which is difficult to manufacture but makes diamond an extremely efficient thermal conductor while retaining electrical insulation. The sample shown by the company remains unpolished and still needs to go through some processes to make it suitable for chipmakers. The company also showed in a graph that it is now thought possible to create a D300 SCD wafer before 2030, matching the size of wafers used in leading node processes; the article notes this goal took 25 years and 300mm diamond wafers are in the company's sights for 2030.

Impact and signal

Affected components and suppliers

Source and time

Source: Tom's Hardware · 11/8/2026 · View original source