Abstract
A new approach to quantitative analysis of the concentration of boron atoms in diamond using secondary- ion mass spectrometers with time-of-flight mass analyzers is proposed. Along with the known boron-containing lines (B, BC, BC2), many lines related to cluster secondary ions BC N have been found in the mass spectrum; their intensity increases by one or two orders of magnitude when Bi3 probe ions are used. Lines BC4, BC6, BC2, and BC8 have the highest intensity (in the descending order); when they are summed, the sensitivity increases by an order of magnitude in comparison with the known mode of detecting BC2. The parameters of the boron δ-layer in single-crystal diamond films grown under optimal conditions have been measured to be unprecedented: the δ-layer width is about 2 nm, and the concentration is 6.4 × 1020 cm–3 (the boron concentrations for doped and undoped diamonds differ by four orders of magnitude).
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Original Russian Text © M.N. Drozdov, Yu.N. Drozdov, M.A. Lobaev, P.A. Yunin, 2018, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2018, Vol. 44, No. 7, pp. 52–60.
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Drozdov, M.N., Drozdov, Y.N., Lobaev, M.A. et al. New Cluster Secondary Ions for Quantitative Analysis of the Concentration of Boron Atoms in Diamond by Time-of-Flight Secondary-Ion Mass Spectrometry. Tech. Phys. Lett. 44, 297–300 (2018). https://doi.org/10.1134/S106378501804003X
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DOI: https://doi.org/10.1134/S106378501804003X