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Hydrogen-Assisted Sputtering Growth of TiN on Ceramic Substrates

1
Department of Electrical and Computer Engineering, Ajou University, Suwon 16499, Korea
2
Smart Electronics Inc., 87 Samdongro, Ulsan 44956, Korea
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(4), 255; https://doi.org/10.3390/coatings9040255
Received: 20 March 2019 / Revised: 9 April 2019 / Accepted: 15 April 2019 / Published: 17 April 2019
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Abstract

Titanium nitride (TiN) has mechanical and electrical characteristics applicable for very large scale integration (VLSI) and discrete electronic devices. This study assessed the effect of hydrogen on sputtering growth of TiN on ceramic substrates. Although ceramic substrate is used in discrete device applications due to its insulating property, ceramic is also porous and contains oxygen and water vapor gases, which can be incorporated into TiN films during growth. In addition, discrete devices are usually packaged in glass sealing at 700 °C, and reaction with the trapped gases can significantly degrade the quality of the TiN film. In order to evaluate ways to minimize the effects of these gases on TiN, hydrogen gas was introduced during sputtering growth. The main hypothesis was that the hydrogen gas would react with oxygen to lower the oxygen density in the vacuum chamber, which would suppress the effects of the trapped gases in the ceramic and ultimately improve the quality of the TiN film. Improvements in TiN quality were confirmed by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and resistance measurements. During the glass-sealing process, N2-purging at 400 °C was effective at keeping the TiN in a low resistance state. These results show that introducing hydrogen gas during sputtering growth could solve the problems caused by ceramic substrates. View Full-Text
Keywords: annealing; ceramic substrate; hydrogen; sputtering; titanium nitride; X-ray diffraction annealing; ceramic substrate; hydrogen; sputtering; titanium nitride; X-ray diffraction
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Choi, J.; Jeon, W.; Kang, D.; Kang, D.; Jo, J. Hydrogen-Assisted Sputtering Growth of TiN on Ceramic Substrates. Coatings 2019, 9, 255.

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