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

C-axis oriented lead germanate film and deposition method
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.
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IPC分类:
H 电学
H01 基本电气元件
H01L 半导体器件;其他类目中不包括的电固体器件(使用半导体器件的测量入G01;一般电阻器入H01C;磁体、电感器、变压器入H01F;一般电容器入H01G;电解型器件入H01G9/00;电池组、蓄电池入H01M;波导管、谐振器或波导型线路入H01P;线路连接器、汇流器入H01R;受激发射器件入H01S;机电谐振器入H03H;扬声器、送话器、留声机拾音器或类似的声机电传感器入H04R;一般电光源入H05B;印刷电路、混合电路、电设备的外壳或结构零部件、电气元件的组件的制造入H05K;在具有特殊应用的电路中使用的半导体器件见应用相关的小类)
H01L21/00 专门适用于制造或处理半导体或固体器件或其部件的方法或设备
H01L21/02 .半导体器件或其部件的制造或处理
H01L21/04 ..至少具有一个跃变势垒或表面势垒的器件,例如PN结、耗尽层、载体集结层
H01L21/18 ...器件有由周期表Ⅳ族元素或含有/不含有杂质的AⅢBⅤ族化合物构成的半导体,如掺杂材料
H01L21/30 ....用H01L21/20至H01L21/26各组不包含的方法或设备处理半导体材料的(在半导体材料上制作电极的入H01L21/28)
H01L21/31 .....在半导体材料上形成绝缘层的,例如用于掩膜的或应用光刻技术的(密封层入H01L21/56);以及这些层的后处理;这些层的材料的选择
H01L21/314 ......无机层(H01L21/3105,H01L21/32优先)
H01L21/316 .......由氧化物或玻璃状氧化物或以氧化物为基础的玻璃组成的无机层
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