CHARACTERIZATION OF AMORPHOUS BARIUM-TITANATE FILMS PREPARED BY RF SPUTTERING

被引:35
作者
MCCLURE, DJ
CROWE, JR
机构
来源
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY | 1979年 / 16卷 / 02期
关键词
ELECTRIC PROPERTIES - SPUTTERING;
D O I
10.1116/1.569934
中图分类号
O59 [应用物理学];
学科分类号
摘要
The physical and electrical properties of amorphous BaTiO//3 films prepared by rf sputtering have been investigated as a function of rf power, substrate temperature and bias, and sputtering gas pressure and composition. A charge storage capacity of similar 0. 04 C/m**2 was found for films prepared in pure argon on substrates held at near room temperture during deposition. These films showed a dielectric constant of similar 14 with little dependence on frequency or temperature. No evidence for ferroelectric behavior was observed. Inadequate substrate cooling yielded films which had very high dissipation factors and low breakdown strengths. The addition of oxygen to the sputtering gas resulted in films which exhibited a strong temperature coefficient of capacitance which increased at low frequencies. Oxygen additions produced a change in the titanium to barium ratio present in the films and gave rise to increases in the dielectric dissipation factor, the dc conductivity, and the defect density.
引用
收藏
页码:311 / 314
页数:4
相关论文
共 6 条
  • [1] BIRKS JB, 1960, MODERN DIELECTRIC MA, P9
  • [2] Feuersanger A. E., 1969, THIN FILM DIELECTRIC, P209
  • [3] MARRELLO V, 1976, IBM TECH DISCL B, V19, P2219
  • [4] ONTON A, 1976, STRUCTURE EXCITATION, P320
  • [5] SUTTON PM, 1960, PROGR DIELECTRICS, V2, P113
  • [6] TOMOZAWA M, 1977, TREATISE MATERIALS S, V12, P283