Effects of gas flow on particle growth in silane RF discharges

Yasuhiro Matsuoka, Masaharu Shiratani, Tsuyoshi Fukuzawa, Yukio Watanabe, Kyo Seon Kim

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34 Citations (Scopus)


The effects of gas flow on particle growth in silane RF discharges in a plasma chemical vapor deposition (PCVD) reactor with a shower-type powered electrode are studied using an in situ two-dimensional polarization-sensitive laser-light-scattering method. Particle growth depends on both the production of short-lifetime radicals and the loss of neutral clusters in the radical production region around the plasma/sheath boundary near the powered electrode. Gas flow of a velocity above about 6 cm/s is effective in suppressing particle growth because of increase in loss of neutral clusters. Moreover, particles larger than 120 nm in size that flow to the plasma/sheath boundary near the grounded electrode are found to pass through the sheath. This implies that such particles may deposit on film surfaces for PCVD reactors with the shower-type powered electrode.

Original languageEnglish
Pages (from-to)4556-4560
Number of pages5
JournalJapanese Journal of Applied Physics
Issue number7 B
Publication statusPublished - Jul 1999

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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