Structural and dielectric properties of the BaTi5O11 thin film grown on the poly-si substrate using RF magnetron sputtering

Young Hun Jeong, Bo Yun Jang, Suk Jin Lee, Ho Jung Sun, Sahn Nahm, Woo Sung Lee, Myong Jae Yoo, Nam Gi Gang, Hwack Joo Lee

Research output: Contribution to journalArticle

Abstract

The BaTi5O11 thin films were grown on the poly-Si/SiO2/Si substrate using rf magnetron sputtering and their structural and dielectric properties were investigated. The BaO-TiO2 thin film deposited on the poly-Si substrate had an amorphous phase even though the growth temperature was high at 550°C. The crystalline BaTi 5O11 thin films were formed when the amorphous film was annealed above 800°C. The BaTi5O11 phase was decomposed into Ba4Ti13O30, Ba 2Ti9O20 and TiO2 phases as the films were annealed above 1100°C. The homogeneous BaTi5O11 thin film was formed when the film was grown at 550°C and rapid thermal annealed at 900°C for 3 min. The interface between the BaTi 5O11 film and poly-Si substrate was sharp, and the inter-diffusions of the Si, Ba and Ti ions between the layers were negligible. The dielectric constant of the BaTi5O11 film was about 35, which is close to that of the bulk BaT5O11 ceramics. The dissipation factor of all the films was smaller than 4.0%.

Original languageEnglish
Pages (from-to)5506-5509
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number8 A
DOIs
Publication statusPublished - 2004 Aug

Keywords

  • Batio thin film
  • Dielectric constant
  • Microwave dielectrics
  • Rf sputtering

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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