Leakage Current, Dielectric Properties and Stresses of $Ta_2O_{5}$ Thin Films

$Ta_2O_{5}$ 박막의 누설전류 및 유전특성과 박막응력

  • Lee, Jae-Suk (Department of metallurgical Engineering, Han Yang University) ;
  • Yang, Ki-Seung (LD-project, Samsung Advanced Institute of Technology) ;
  • Shin, Sang-Mo (Sensor Instrument Team, Korea Electronics Technology Institute) ;
  • Park, Jong-Won (Department of metallurgical Engineering, Han Yang University)
  • 이재석 (한양대학교 금속공학과) ;
  • 양승기 (삼성종합기술원 LD-project 실) ;
  • 신상모 (전자부품종합기술연구소 센서기기연구팀) ;
  • 박종완 (한양대학교 금속공학과)
  • Published : 1995.09.01

Abstract

Two types of $Ta_2O_{5}$, films, prepared by thermal oxidation and PECVD, on P-type(100) Si wafers were studied to examine the relationship between electrical properties and stresses of the films. For the thermally oxidized films, Ta films were depositied on the Si wafers by dc magnetron sputtering followed by thermal oxidation as functions of oxidation temperature and time. The PECVD films were deposited on the Si wafers as a fuction of RF power density. The relationship between the electrical properties and film stresses were studied. In the case of thermally oxidized $Ta_2O_{5}$ film, the electrical properties and film stress were not found to be dependent on each other, while PECVD $Ta_2O_{5}$ films showed that the electrical properties were depended on the film stress.

열산화 및 PECVD법으로 p-type(100)Si wafer위에 $Ta_2O_{5}$, 박막을 형성한 후 이들 박막의 전기적 특성과 박막응력 상호간의 관계를 연구하였다 열산화 시편의 경우 dc magnetron sputtering법으로 Ta을 증착시킨 후에 산화온도와 시간을 변수로 열산화시켜 박막을 형성시켰으며 PECVD 시편의 경우 RF power density를 변화시켜가면서 박막을 형성시켰다. 이들 박막의 전기적 특성과 박막응력을 조사하여 전기적 특성과 박막응력 상호간의 관계를 조사한 결과 열산화 박막의 경우 누설전류와 박막응력은 독립적인데 반해 PECVD 박막의 경우 박막응력의 절대값은 누설전류가 증가함에 따라 증가하였다.

Keywords

References

  1. J. Electrochem. Soc. : Solid State Science and Technology v.34 K. F. Roenigk;K. F. Jensen
  2. 한국재료학회지 v.2 no.5 문환성;이재석;한성욱;박상균;양승기;이재학;박형호;박종완
  3. 한국재료학회지 v.3 no.3 문환성;이재석;한성욱;박상균;양승기;이재천;박종완
  4. J. Mat. Sci. v.29 Hwan Seong Moon;Jae Suk Lee;Sung Wook Han;Jong Wan Park;Jae Hak Lee;Seung Kee Yang;Hyung Ho Park
  5. IEDM 89 Y. Numasawa;S. Kamayama;M. Zenke;M. Sakamoto
  6. Mat. REs. Symp. Proc. v.130 P. A. Flinn