Bulletin of the Korean Chemical Society

  • 제18권1호
  • /
  • Pages.56-61
  • /
  • 1997
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Deposition of Ferroelectric PB(Zr0.52Ti0.48)O3 Films on Platinized Silicon Using Nd:YAG Laser

  • Im, Hoong-Sun (Korea Research Institute of Standards and Science, Taeduk Science Town) ;
  • Kim, Sang-Hyeob (Korea Research Institute of Standards and Science, Taeduk Science Town) ;
  • Choi, Young-Ku (Medicinal Resources Research Center and Department of Chemistry, Wonkwang University) ;
  • Lee, Kee-Hag (Medicinal Resources Research Center and Department of Chemistry, Wonkwang University) ;
  • Jung, Kwang-Woo (Medicinal Resources Research Center and Department of Chemistry, Wonkwang University)
  • 발행 : 1997.01.20
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초록

Lead zirconate titanate (PZT) thin fills were deposited onto the Pt/Ti/SiO2/Si substrate by the pulsed laser deposition with the second harmonic wavelength (532 nm) of Nd:YAG laser. In order to determine the optimum conditions for the film deposition, the phase of the films were investigated as functions of ambient oxygen pressure, substrate temperature, and laser fluence. Also the chemical composition analysis was conducted for the PZT films deposited under various ambient oxygen pressure. When the distance between substrate and bulk PZT target is set to 20 mm, the optimum conditions have been determined to be 3 torr of oxygen pressure, 1.5 J/cm2 of laser fluence, and 823-848(±10) K range of substrate temperature. At these conditions, perovskite phase PZT films were obtained on platinized silicon. The chemical composition of the films is very similar to that of PZT bulk target. The physical structure of the deposited films analyzed by scanning electron microscopy shows a columnar morphology perpendicular to the substrate surface. Capacitance-Voltage hysteresis loop measurements show also a typical characteristics of ferroelectric thin film. The dielectric constant is found to be 528 for the 0.48 μm thickness of PZT thin film.

키워드

참고문헌

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피인용 문헌

  1. Mass Spectrometric Study of Carbon Cluster Formation in Laser Ablation of Graphite at 355 nm vol.23, pp.2, 1997, https://doi.org/10.5012/bkcs.2002.23.2.309