Formation of singular (001) terraces on the surface of single-crystal HPHT diamond substrates


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Abstract

Methods of the experimental diagnostics and control of the misorientation angle for single-crystal HPHT (High Pressure High Temperature) diamond substrates are discussed. Such substrates are used for the homoepitaxial growth of doped and undoped CVD diamond layers. The formation of singular (001) terraces on the surface of HPHT diamond after microwave-discharge-plasma etching in pure hydrogen or a hydrogen–oxygen mixture is observed. This phenomenon can be used for rapid determination of the substrate misorientation and to improve the control precision of the deviation angle during substrate polishing, or for obtaining large singular (001) areas of single-crystal diamond substrates.

About the authors

P. A. Yunin

Institute for Physics of Microstructures; Institute of Applied Physics; Lobachevsky State University of Nizhny Novgorod

Author for correspondence.
Email: yunin@ipmras.ru
Russian Federation, ul. Ul’yanova 46, Nizhny Novgorod, 603950; ul. Ul’yanova 46, Nizhny Novgorod, 603950; pr. Gagarina 23, Nizhny Novgorod, 603950

Yu. N. Drozdov

Institute for Physics of Microstructures; Lobachevsky State University of Nizhny Novgorod

Email: yunin@ipmras.ru
Russian Federation, ul. Ul’yanova 46, Nizhny Novgorod, 603950; pr. Gagarina 23, Nizhny Novgorod, 603950

V. V. Chernov

Institute of Applied Physics

Email: yunin@ipmras.ru
Russian Federation, ul. Ul’yanova 46, Nizhny Novgorod, 603950

V. A. Isaev

Institute of Applied Physics

Email: yunin@ipmras.ru
Russian Federation, ul. Ul’yanova 46, Nizhny Novgorod, 603950

S. A. Bogdanov

Institute of Applied Physics

Email: yunin@ipmras.ru
Russian Federation, ul. Ul’yanova 46, Nizhny Novgorod, 603950

A. B. Muchnikov

Institute of Applied Physics

Email: yunin@ipmras.ru
Russian Federation, ul. Ul’yanova 46, Nizhny Novgorod, 603950


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