08MB1900, Development of CMOS based MEMS processed multi-functional sensor for ubiquitous environment,
Chang Auck Choi
Abstract
La0.7Sr0.3MnO3 박막을 rf 마그네트론 스퍼터를 이용하여 챔버 내 산소가스유량비를 0, 40, 80 sccm 으로 조절하고 후열처리 공정 없이 기판온도를 350℃로 유지하면서 SiO2/Si(100) 및 Si(100) 기판에 증착하였다. 증착된 La0.7Sr0.3MnO3 박막은 SiO2/Si(100), Si(100) 기판 모두 (100), (110), (200)면을 갖는 polycrystalline 상태였으며, oxygen flow rate이 증가함에 따라 박막의 grain size가 증가하였다. 증가되는 grain size로 인하여 grain boundary가 감소하였고 따라서 높은 oxygen flow rate에서 증착된 박막은 면저항이 감소하는 현상을 나타내었다. SiO2/Si 기판과 Si 기판에 증착된 LSMO 박막의 TCR 값은 약 -2.0 ~ -2.2%를 나타내었다.
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