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Evaluation of the effect of the state of the vacuum vessel wall on the plasma in high-frequency process plasmas

Research Project

Project/Area Number 21K13907
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14030:Applied plasma science-related
Research InstitutionNagoya University

Principal Investigator

Suzuki Haruka  名古屋大学, 工学研究科, 講師 (80779356)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsプロセスプラズマ / 容量結合型プラズマ / 誘導結合型プラズマ / プラズマ電位 / 高周波プラズマ / CCP / シース
Outline of Research at the Start

半導体製造装置を模したプラズマプロセス容器壁のインピーダンスが変化した際のプラズマ電位及び容器壁の電位について、プローブを用いて計測し、電気回路論と組み合わせることにより、装置内でのRF振動成分及びDC成分の電位変動のモデルの構築を行う。これにより、プロセスプラズマの安定制御の指針を得る。

Outline of Final Research Achievements

In high-frequency plasma sources, one of the typical process plasma systems, spatial plasma non-uniformity may occur due to the structure of the system. Plasma diagnostics is indispensable for the evaluation, but it is difficult to adopt a plasma measurement method that causes disturbances. In this study, the effects of device structures such as walls and electrodes on the plasma in process plasmas were investigated using non-contact measurement techniques. Electrode and liner wall potentials were measured using a high-voltage probe to clarify the one-dimensional potential structure in high-frequency plasmas, and the plasma potential fluctuations were evaluated when the ground area was changed. In order to clarify the three-dimensional spatial structure of the plasma, the plasma emission distribution was estimated by camera measurements.

Academic Significance and Societal Importance of the Research Achievements

現在の半導体製造プロセス容器の内部壁は絶縁酸化物で被覆されており、被膜はプラズマの曝露により劣化していく。これによりプラズマに不均一性が生じたり、プラズマ電位の変動によりイオンエネルギー、つまりプロセスの精度に影響を与えたりする可能性がある。そのため、装置の異常検知やメンテナンス箇所の見極めは非常に重要である。
本研究では、電極及び壁面の電位計測により、簡易的な等価回路モデルを用いながらも、浮遊壁に囲まれたプラズマの電位の推定が可能となった。また、画像の再構成からプラズマ発光の2.5次元空間情報の取得を確認した。これらの手法は、新しいプロセスプラズマの非接触評価方法として有望であると考えられる。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (4 results)

All 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Influence of small ground surface on plasma property in an inductively-coupled plasma with floating liner2022

    • Author(s)
      Kyuzo Manabu、Chiba Yukinori、Suzuki Haruka、Toyoda Hirotaka
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SA Pages: SA1008-SA1008

    • DOI

      10.35848/1347-4065/ac7e19

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] RF Voltage Division of in RF-biased High-density Plasma with Floating Liner2022

    • Author(s)
      Yukinori Chiba, Manabu Kyuzo, Haruka Suzuki, Hirotaka Toyoda
    • Organizer
      ISPlasma2022/IC-PLANTS2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Influence of metal exposure on the plasma potential in RF-biased high-density plasma with floating liner2021

    • Author(s)
      Yukinori Chiba, Manabu Kyuzo, Haruka Suzuki and Hirotaka Toyoda
    • Organizer
      The 12th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology(APSPT-12)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Influence of small grounded surface on plasma property in an inductively-coupled plasma with floating liner2021

    • Author(s)
      Manabu Kyuzo, Yukinori Chiba, Haruka Suzuki, and Hirotaka Toyoda
    • Organizer
      42nd International Symposium on DryProcess
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2024-01-30  

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