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http://dx.doi.org/10.9725/kts.2019.35.3.176

Enhancement of Wear and Corrosion Resistances of Monocrystalline Silicon Wafer  

Urmanov, B. (Graduate School, Dept. of Mechanical Engineering, Sun Moon University)
Ro, J.S. (Graduate School, Dept. of Mechanical Engineering, Sun Moon University)
Pyun, Y.S. (Dept. of Mechanical Engineering, Sun Moon University)
Amanov, A. (Dept. of Mechanical Engineering, Sun Moon University)
Publication Information
Tribology and Lubricants / v.35, no.3, 2019 , pp. 176-182 More about this Journal
Abstract
The primary objective of this study is to treat a monocrystalline silicon (Si) wafer having a thickness of $279{\mu}m$ by employing the ultrasonic nanocrystal surface modification (UNSM) technology for improving the efficiency and service life of nano-electromechanical systems (NEMSs) and micro-electromechanical systems (MEMSs) by enhancing of wear and corrosion resistances. The wear and corrosion resistances of the Si wafer were systematically investigated before and after UNSM treatment, wherein abrasive, oxidative and spalling wear mechanisms were applied to the as-received and subsequently UNSM-treated Si wafer. Compared to the asreceived state, the wear and corrosion resistances of the UNSM-treated Si wafer are found to be enhanced by about 23% and 14%, respectively. The enhancement in wear and corrosion resistances after UNSM treatment may be attributed to grain size refinement (confirmed by Raman spectroscopy) and modified surface integrity. Furthermore, it is observed that the Raman intensity reduced significantly after UNSM treatment, whereas neither the Raman shift nor new phases were found on the surface of the UNSM-treated Si wafer. In addition, the friction coefficient values of the as-received and UNSM-treated Si wafers are found to be about 0.54 and 0.39, respectively. Hence, UNSM technology can be effectively incorporated as an alternative mechanical surface treatment for NEMSs and MEMSs comprising Si wafers.
Keywords
silicon wafer; friction and wear behavior; corrosion; ultrasonic nanocrystal surface modification technology;
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