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Transmission electron microscopy and high-resolution electron microscopy methods used to study multilayered heterocompositions don’t allow for effective studying of amorphous materials and require the analysis of many local zones in case of specimens that consist of separate crystallites. In this work, a multilayered heterocomposition, which is a phase-shifting photomask consisting of nanoscale thickness layers on the surface of a glass substrate, is studied. Focused ion beam methods were used to make a preparation of normal and longitudinal cross section thin foils. Normal cross section foil prepared using standard approaches allowed for layers visualization, thickness measurement and composition analysis. It was demonstrated that a 93 nm thick amorphous layer of Mo0.06Si0.31N0.63 is formed on the SiO2 substrate, which is successively covered by polycrystalline layers of Cr0.56N0.44, Cr0.74C0.06N0.2 and Cr0.4N0.26O0.3 with thicknesses of 22, 37 and 8 nm, respectively. Longitudinal cross section foil prepared at a slight inclination to the surface of the photomask made it possible to form sections of all layers with dimensions sufficient for their study by electron microdiffraction. The performed phase analysis has confirmed the amorphous structure of the substrate and the Mo0.06Si0.31N0.63 layer, and also has shown that the polycrystalline Cr0.56N0.44, Cr0.74C0.06N0.2 and Cr0.4N0.26O0.3 layers are formed by crystallites with a cubic lattice and parameters 3.92, 4.18 and 4.12 Å, respectively.
  • Key words: nanostructures, transmission electron microscopy, electron microdiffraction, focused ion beam
  • Published in: FUNDAMENTAL RESEARCHES
  • Bibliography link: Volkov R. L., Borgardt N. I. Multilayered nanoscale heterocompositions structure study using transmission electron microscopy. Proc. Univ. Electronics, 2023, vol. 28, no. 6, pp. 711–726. https://doi.org/10.24151/1561-5405-2023-28-6-711-726
  • Financial source: The work has been supported by the Ministry of Education and Science of the Russian Federation within the framework of the state task (Agreement FSMR-2023-0014) and using the equipment of the CCP “Diagnostics and modification of microstructures and nanoobjects”.
Roman L. Volkov
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)
Nikolay I. Borgardt
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

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