이온빔 보조 증착법을 이용항 제작된 SnO$_2$에 초박막 Pd가 첨가된 박막형 가스센서의 메탄가스 감지특성 |
조정, 조준식, 윤기현1, 김현주2, 최원국, 정형진3, 고석근 |
한국과학기술원 박막기술연구센터 1연세대학교 세라믹공학과 2충주산업대학교 교양과학부 3한국과학기술원 박막기술연구센 |
The Sensitivity of Ultra Thin Pd-doped SnO$_2$ Gas Snesor Fabricated by Ion-Assisted Deposition for Methane Gas |
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ABSTRACT |
SnO2 thin films were fabricated by reactive ion-assisted deposition(R-IAD) and metallic Pd layer with 30 $AA$ in thickness as a catalyst was sub-surface diffused on SnO2 thin film in two different ways by ion beam sputtering the first it was in-situ deposited on pre-heated substrate at 30$0^{circ}C$ with cooling down for 1 hr and the second it was annealed at 30$0^{circ}C$ in the air atmosphere for 1 hr. The sensor with surface adsorbed Pb layer in vacuum showed 4-5 times higher sensitivity to CH4 than that of the sensor annealed in the air From the XPS analyses |
Key words:
SnO$_2$, thin film, Reactive ion-assisted deposition, Ultra-thin Pd layer, Ion beam sputtering, Sputtering, Spill-over |
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