• Title/Summary/Keyword: polycrystalline

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Study on the electric properties of layered $BaTiO_3$ films prepared new stacking method (새로운 방법으로 제조된 적층구조 $BaTiO_3$ 박막의 전기적 특성에 관한 연구)

  • Song, Man-Ho;Lee, Yun-Hi;Hahn, Taek-Sang;Oh, Myung-Hwan;Yoon, Ki-Hyun
    • Proceedings of the KIEE Conference
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    • 1995.07c
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    • pp.1129-1132
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    • 1995

  • In the preparation of the layered $BaTiO_3$ thin films with high performance, the new stacking method using the continuous cooling of the substrate was introduced. Amorphous/polycrystalline $BaTiO_3$ layered structure was confirmed by SEM and index of refraction. The layered $BaTiO_3$ thin films formed by the new stacking method showed such a high dielectric constant that the layered structure could not be explained by a stacking structure of the two defined layers but could only be explained by multi-layered structure, i.e. amorphous/micro crystalline/polycrystalline structure. The layered $BaTiO_3$ thin film with a thickness of 240 nm showed higher capacitance per unit area and breakdown strength than the double layered $BaTiO_3$ thin film prepared by the conventional stacking method. And well defined ferroelectric hysteresis leer was observed in the layered $BaTiO_3$ thin film with a thickness of 200 nm.

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