Korean Journal of Chemical Engineering, Vol.35, No.1, 246-250, January, 2018
Effects of growth temperature on titanium carbide (TiC) film formation using low-frequency (60 Hz) plasma-enhanced chemical vapor deposition
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TiC films were formed by low-frequency (60Hz) plasma-enhanced chemical vapor deposition (LFPECVD) using TiCl4, CH4, and H2 gas mixtures. The effects of the growth temperature and feasibility for the on-glass deposition of TiC films were investigated. The growth kinematics of TiC films was controlled mainly by surface-reactions below 450 °C, and dominated by a mass-transfer process above 450 °C. The films exhibited a face-centered cubic structure, and the preferred orientation of film growth was mainly the (200) plane. The [C]/[Ti] ratio was over-stoichiometric below 400 °C, and became almost stoichiometric above 450 °C. The optical properties of the films were characterized by high reflectance in near infrared (NIR) region and a steep edge in the visible region, and the reflectance in the NIR region increased gradually with increasing temperature. As a result, LF-PECVD is a useful technique to acquire Cl-free TiC films at relatively low temperatures.
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