2019, Shostachenko, S. A., Zakharchenko, R. V., Ryzhuk, R. V., Leshchev, S. V., Захарченко, Роман Викторович, Рыжук, Роман Валериевич, Лещев, Сергей Валерьевич

© 2019 Published under licence by IOP Publishing Ltd. Tantalum nitride thin films were deposited on Al2O3 substrates by the dc-magnetron sputtering technique. The nitrogen content in the argon/nitrogen flow varied from 5 to 50%. Structural properties were studied using X-ray diffraction. The ratio of Ar:N2 was 4:1; the ratio of Ta:N became 1:1. Sheet resistance depends on thickness and is in the range of 20 - 80 Ω/□ due to thickness 100 - 50 nm. The TaN films deposited at a nitrogen/argon ratio of 20% show the thermal stability of the resistance in the 25-400°C temperature range. Sheet resistance degradation was ∼ 5%. The TCR value was determined in the range of 25 - 300 C and was equal to - 21 ppm/K.

2019, Shostachenko, S. A., Porokhonko, Y. A., Zakharchenko, R. V., Leshchev, S. V., Maslov, M. M., Katin, K. P., Захарченко, Роман Викторович, Лещев, Сергей Валерьевич, Маслов, Михаил Михайлович, Катин, Константин Петрович

© 2019 Published under licence by IOP Publishing Ltd. This paper is dedicated to the experimental investigation of Ohmic contacts to the n+-doped region of the AlGaN/GaN transistor heterostructure based on Ti/Al/Ni/Au metallization. The Al-Ti-N system has been assessed on the basis of available thermodynamic descriptions for binary subsystems. The effect of annealing temperature on the specific resistance of Ohmic contact was studied.

2019, Golubeva, T., Konshin, S., Leshchev, S., Mironova, N., Tshukin, B., Лещев, Сергей Валерьевич, Миронова, Наталия Борисовна, Щукин, Борис Алексеевич

© 2019, Springer International Publishing AG, part of Springer Nature. In the article authors give research results of the influence of the movement direction of earth-moving machines on the stability of the remote control data transmission through mobile communication channels. The authors carried out an extensive analysis of the state of research in this and related fields. If movement direction of earth-moving and construction machines changes with respect to the nearest radio transmitting tower of the mobile communication base station, theoretically an instability in data transmission of data over mobile communication channels will appear. To establish the admissibility of such instability, experiments were performed in real conditions, the results of which are presented in the article.