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논문 기본 정보

자료유형
학술저널
저자정보
Juhyun Lee (Hanyang University) Seokyoon Shin (Hanyang University) Sejin Kwon (Hanyang University) Woochool Jang (Hanyang University) Hyeongsu Choi (Hanyang University) Hyunwoo Park (Hanyang University) Namgue Lee (Hanyang University) Hyeongtag Jeon (Hanyang University)
저널정보
한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제22권 제3호
발행연도
2021.1
수록면
253 - 257 (5page)

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초록· 키워드

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Among various thin film encapsulation (TFE) methods, thin films prepared by atomic layer deposition (ALD) have been shownto provide superior protection against the permeation of moisture and oxygen. This technique has numerous of advantagessuch as excellent uniformity, precise thickness control, and strong adhesion. Therefore, with ozone-based ALD, we conductedthe influence of the thickness of aluminum oxide (Al2O3) on moisture barrier properties. From the results of an electricalcalcium test, Al2O3 had two distinctly different permeation regimes. Between 10 and 25 nm of Al2O3 thickness, the water vaportransmission rate (WVTR) decreased exponentially from 6.3 × 10?3 to 1.0 × 10?4 g m?2 day?1 (1/60 times). In contrast, asthickness increased from 25 to 100 nm, the WVTR values decreased by only two-thirds, from 1.0 × 10?4 to 6.6 × 10?5 g·m?2·day?1. Tobetter understand the change from an exponential to a sub-exponential regime, defect density and refractive index of Al2O3were measured. The thickness dependence on defect density and refractive index was analogous with one of moisture barrierperformance. These results confirmed the existence of a critical thickness at which the WVTR decreased drastically.

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