发明公开
EP1049148A2 C-axis oriented lead germanate film and deposition method
审中-公开
C-Axen-orientierter Bleigermanat-Film和Abscheidungsmethode
- 专利标题: C-axis oriented lead germanate film and deposition method
- 专利标题(中): C-Axen-orientierter Bleigermanat-Film和Abscheidungsmethode
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申请号: EP00303640.7申请日: 2000-04-28
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公开(公告)号: EP1049148A2公开(公告)日: 2000-11-02
- 发明人: Li, Tingkai , Zhang, Fengyan , Ono, Yoshi , Hsu, Sheng Teng
- 申请人: SHARP KABUSHIKI KAISHA
- 申请人地址: 22-22 Nagaike-cho Abeno-ku Osaka 545-8522 JP
- 专利权人: SHARP KABUSHIKI KAISHA
- 当前专利权人: SHARP KABUSHIKI KAISHA
- 当前专利权人地址: 22-22 Nagaike-cho Abeno-ku Osaka 545-8522 JP
- 代理机构: West, Alan Harry
- 优先权: US301420 19990428
- 主分类号: H01L21/316
- IPC分类号: H01L21/316
摘要:
A ferroelectric Pb 5 Ge 3 O 11 (PGO) thin film is provided with a metal organic vapor deposition (MOCVD) process and RTP (Rapid Thermal Process) annealing techniques. The PGO film is substantially crystallization with c-axis orientation at temperature between 450 and 650° C. The PGO film has an average grain size of about 0.5 microns, with a deviation in grain size uniformity of less than 10%. Good ferroelectric properties are obtained for a 150 nm thick film with Ir electrodes. The films also show fatigue-free characteristics: no fatigue was observed up to 1 x 10 8 switching cycles. The leakage currents increase with increasing applied voltage, and are about 3.6 x10 -7 A/cm 2 at 100 kV/cm. The dielectric constant shows a behavior similar to most ferroelectric materials, with a maximum dielectric constant of about 45. These high quality MOCVD Pb 5 Ge 3 O 11 films can be used for high density single transistor ferroelectric memory applications because of the homogeneity of the PGO film grain size.
公开/授权文献
- EP1049148A3 C-axis oriented lead germanate film and deposition method 公开/授权日:2002-05-29
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