Regensburg 2025 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 15: Crystal Structure Defects / Real Structure / Microstructure

KFM 15.1: Hauptvortrag

Donnerstag, 20. März 2025, 09:30–10:00, H9

Is CVD diamond now ready to become an electronic material? — •Philippe Bergonzo — University College London UK — Seki Diamond System, San Jose CA, USA

CVD Diamond is an exceptional material combining superlative properties like electronic properties, thermal conductivity, biocompatibility, radiation resistance, and optical properties. These advantages make diamond an excellent material for a broad range of applications, including radiation detectors, high transparency windows, electronic devices, quantum devices, sensors, etc. Remarkable devices have been fabricated and are still respected as a reference. But still, can diamond come out of the lab to become a competitive device material? Although diamond synthesis is a pretty well-established technique, there are still more than 80% of the machines growing diamond on the planet that grow it to make gemstones. And this has always inhibited the progress this material deserved. Only very recently, and with the recent huge downturn that affects the gem business, one can consider that we may have reached an inflection point where CVD diamond may soon benefit from being something else than a gemstone. Potentially, innovative developments for physics may not be kept secret because they could be more valuable for the gem market, if this latter one is collapsing. In this context, how can we facilitate this progress? Drawing from typical cases where diamond-based devices are used for specific applications, examples will be used to illustrate material opportunities and challenges towards diamond to become a standard for device applications.

Keywords: CVD diamond; Electronic properties; Substrates and growth; Radiation detectors