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Open Access

Properties and Morphology of TiN Films Deposited by Atomic Layer Deposition

Siyi Xie, Jian Cai( ), Qian Wang, Lu Wang, Ziyu Liu
Institute of Microelectronics, Tsinghua University, Beijing 100084, China
Institute of Microelectronics and Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, China
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Abstract

In this study, TiN films were deposited on SiO 2 substrates by Atomic Layer Deposition (ALD) using TiCl 4 and NH 3 as precursors. Properties and morphology of the TiN films were characterized by different methods. Using Grazing Incidence X-Ray Diffraction (GIXRD), TiN films demonstrated polycrystalline structure with (111) preferred orientation. Film thickness was measured by Spectroscopic Ellipsometry (SE) and a stable growth rate of 0.0178 nm/cycle was reached after 500 deposition cycles, which was consistent with the essence of ALD as a surface-saturated self-limiting reaction. Film resistivity measured by a four-point probe continuously decreased with increasing deposition cycles until it reached the minimum value of 300 μ\upOmega⋅cm at 5000 deposition cycles with a thickness of 87.04 nm. The surface roughness and morphology of the TiN films at different deposition cycles ranging from 50 to 400 were analyzed by Atomic Force Microscopy (AFM). The AFM results indicated that the initial film growth follows the Stranski-Krastanov mode.

Keywords

atomic layer depositiontitanium nitridemorphology

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Tsinghua Science and Technology
Volume 19 Issue 2,
April 2014
Pages 144-149
DOI: 10.1109/TST.2014.6787367
Cite this article:
Xie S, Cai J, Wang Q, et al. Properties and Morphology of TiN Films Deposited by Atomic Layer Deposition. Tsinghua Science and Technology, 2014, 19(2): 144-149. https://doi.org/10.1109/TST.2014.6787367

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Received: 07 March 2014
Accepted: 14 March 2014
Published: 15 April 2014
© The author(s) 2014
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