Synthesis of diamond-like carbon films on planar and non-planar geometries by the atmospheric pressure plasma chemical vapor deposition method

Mayui Noborisaka, Tomoaki Hirako, Akira Shirakura, Toshiyuki Watanabe, Masashi Morikawa, Masaki Seki, Tetsuya Suzuki

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Diamond-like carbon (DLC) films were synthesized by the dielectric barrier discharge-based plasma deposition at atmospheric pressure and their hardness and gas barrier properties were measured. A decrease in size of grains and heating substrate temperature improved nano-hardness up to 3.3 GPa. The gas barrier properties of DLC-coated poly(ethylene terephthalate) (PET) sheets were obtained by 3-5 times of non-coated PET with approximately 0.5 μm in film thickness. The high-gas-barrier DLC films deposited on PET sheets are expected to wrap elevated bridge of the super express and prevent them from neutralization of concrete. We also deposited DLC films inside PET bottles by the microwave surface-wave plasma chemical vapor deposition (CVD) method at near-atmospheric pressure. Under atmospheric pressure, the films were coated uniformly inside the PET bottles, but did not show high gas barrier properties. In this paper, we summarize recent progress of DLC films synthesized at atmospheric pressure with the aimed of food packaging and concrete pillar.

Original languageEnglish
Article number090117
JournalJapanese journal of applied physics
Issue number9
Publication statusPublished - 2012 Sep 1


ASJC Scopus subject areas

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

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