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J. Korean Ceram. Soc. > Volume 45(1); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(1): 48.
doi: https://doi.org/10.4191/kcers.2008.45.1.048
저유전물질로의 응용을 휘한 규칙성 메조포러스 실리카 박막에의 HMDS 처리
하태정, 최선규, 유병곤1, 박영호
연세대학교 신소재공학부
HMDS Treatment of Ordered Mesoporous Silica Film for Low Dielectric Application
Tae-Jung Ha, Sun-Gyu Choi, Byoung-Gon Yu1, Hyung-Ho Park
School of Advanced Materials Science and Engineering, Yonsei University
1Electronics and Telecommunications Research Institute
In order to reduce signal delay in ULSI, an intermetal material of low dielectric constant is required. Ordered mesoporous silica film is proper to intermetal dielectric due to its low dielectric constant and superior mechanical properties. The ordered mesoporous silica film prepared by TEOS (tetraethoxysilane) / MTES (methyltriethoxysilane) mixed silica precursor and Brij-76 surfactant was surface-modified by HMDS (hexamethyldisilazane) treatment to reduce its dielectric constant. HMDS can substitute $-Si(CH_3)_3$ groups for -OH groups on the surface of silica wall. In order to modify interior silica wall, HMDS was treated by two different processes except the conventional spin coating. One process is that film is dipped and stirred in HMDS/n-hexane solution, and the other process is that film is exposed to evaporated HMDS. Through the investigation with different HMDS treatment, it was concluded that surface modification in evaporated HMDS was more effective to modify interior silica wall of nano-sized pores.
Key words: Low-k, Ordered meso porous silica film, HMDS, Brij-76
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