Stability of metal electrodes for MLCC with BaTiO3 thin layers by deposition method

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Abstract

The stability of various base metal electrodes was examined for the preparation of MLCC by deposition method. The electrical resistivity of Al and Ni-Cr was lower than Ni and Cu and the Cu and Ni films showed a poor adhesion with Si substrate. The resistivity of Al film was 4 × 10-6 Ω-cm. Ni-Cr film deposited at room temperature have a columnar structure and higher roughness than Al films. As-deposited Al and NiCr show the rms roughness of 35 and 145 A, respectively and Al films showed the very stable structure after annealing. NiCr films show the formation of NiCr 2O4 phase at surface after annealing. The capacitance change with electrodes was neglectable but dissipation factor, of Al/BaTiO 3/Al was more stable than NiCr/BaTiO3/NiCr structure. The NiCr/BaTiO3/NiCr structure showed higher leakage current than that of Al/BaTiO3/Al.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalIntegrated Ferroelectrics
Volume74
DOIs
StatePublished - 2005
EventSeventeenth International Symposium on Integrated Ferroelectrics, ISIF-17 - Shanghai, China
Duration: 17 Apr 200520 Apr 2005

Keywords

  • Base metal electrode
  • Capacitance change
  • Leakage current
  • Resistivity
  • Roughness

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