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논문 기본 정보

자료유형
학술저널
저자정보
Hyun Suk Hwang (서일대학) Won Seok Choi (한밭대학교) Jaesang Cha (서울과학기술대학교)
저널정보
한국통신학회 한국통신학회논문지 한국통신학회논문지 제35권 제11호(무선통신)
발행연도
2010.11
수록면
1,091 - 1,096 (6page)

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초록· 키워드

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Stiction in microelectromechanical systems (MEMS) has been a major failure mechanism. Especially, in RF MEMS switches, moving parts often suffered in-use and release related stiction problems. Some materials and methods have been used to prevent this problem. Diamond-like carbon (DLC) has not only been used as a protective material owing to its good mechanical properties but also has been used as a hydrophobic material. Its properties could be controlled by post annealing treatment in various conditions. We synthesized DLC films using a radio frequency plasma enhanced chemical vapor deposition (RF PECVD) method on silicon substrates using methane (CH₄) and hydrogen (H₂) gas. Then, the change of the hydrophobic property of the films was investigated undervarious annealing temperatures in nitrogen and in oxygen ambient. The films, that were annealed above 700℃ in nitrogen ambient, showed a high contact angle of water (>90°) even though their mechanical property was sacrificed to some degree. The structural variation and the changes of the hydrophobic and mechanical properties of the DLC films were analyzed by Raman spectrum, contact angle measurement, surface profiler, and a nanoindentation test.

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ABSTRACT
Ⅰ. Introduction
Ⅱ. Experimental Details
Ⅲ. Results and Discussion
Ⅳ. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2012-567-003955454