Abstract

We report the first high temperature operation of thin film diamond based semiconductor devices. Boron-doped homoepitaxial diamond films were grown by microwave plasma assisted chemical vapor deposition using insulating natural diamond substrates. The diamond nature of the films was confirmed by several analytical techniques. Excellent rectifying characteristics were obtained for Au-gate Schottky diodes with homoepitaxial diamond base in the 26–583°C temperature range. Surface cleaning of the films was found to be a key step of the fabrication process.

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