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Functional evaluation of surface waviness of contact recording magnetic disk and analytical estimation of head flying locus

Research Project

Project/Area Number 09650162
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 設計工学・機械要素・トライボロジー
Research InstitutionNAGAOKA UNIVERSITY OF TECHNOLOGY

Principal Investigator

YANAGI Kazuhisa  Nagaoka University of Technology, School of Mechanical Engineering, Professor, 工学部, 教授 (80108216)

Co-Investigator(Kenkyū-buntansha) HARA Seiichiro  Nagaoka University of Technology, School of Mechanical Engineering, Assistant, 工学部, 助手 (40293253)
AKETAGAWA Masato  Nagaoka University of Technology, School of Mechanical Engineering, Associate Professor, 工学部, 助教授 (10231854)
YANABE Shigeo  Nagaoka University of Technology, School of Mechanical Engineering, Professor, 工学部, 教授 (30016662)
松野 好洋  日本板硝子ジー, ディー(株)・メディア製造部, 主席技師
嶋本 篤  長岡技術科学大学, 工学部, 助手 (90226225)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordssurface waviness / magnetic disk / tribology / head disk interface / head separation / filtration / 輪郭形状 / ディジタルフィルタ / 円周トラック / 磁気ヘッド / マイクロトライボロジー
Research Abstract

First of all in this study, a distinguished stylus instrument with extremely light load was developed to measure envelope curves along the circumferential tracks of disk surface. Pointed out were the higher measurement accuracy (±1nm/15mm) and the wider surface wavelength band than conventional optical interferometers on the market. An elaborate geometrical regression technique was developed to obtain the proper amplitude data with high S/N ratio.
Considering the head slider size and its follow-up motion to disk surface, the measuring conditions (sampling interval, evaluation length) for assessing the micro-waviness of disk surface were established and a conventional filtering method was adopted to divide the original envelope curve into several wavelength bands. A fairy good agreement was obtained between the processed profiles with the developed instrument and the commercial optical interferometer, OptiFlat. In this stage, some geo-statistical parameters such as mean wavelength, arithmetic mean amplitude and Motif parameters were introduced to evaluate the micro-waviness of disk surfaces.
Additionally, the head readout signal was measured and analyzed to know the relationship between the disk surface profile and the head flying height in operation. The micro-waviness component was closely related to the electro-magnetic conversion characteristics at the head/disk interface. It can be concluded that the disk micro-waviness has a great influence on the physical head-disk separation or the information storage density of HDD.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 原精一郎、神村朋宏、柳和久: "磁気/ディスク面を対象とした輪郭形状測定装置の開発と微小うねり評価法"トライボロジスト(日本トライボロジー学会誌). 45・3. 246-252 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 柳和久ほか4名: "Microwaviness―測定法および電磁変換特性との関係について―"IDEMA Japan News(国際ディスクドライブ協会誌). 33. 9-14 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 坂口智洋、柳和久、原精一郎: "三次元表面凹凸データの横方向間隔パラメータに関する研究"精密工学会誌. 65・9. 1306-1311 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 原精一郎、柳和久: "Micro-wavinessの測定と評価の試み"IDEMA Japan News(国際ディスクドライブ協会誌). 29. 6-9 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 原精一郎ほか3名: "磁気/ディスクの輪郭うねりを対象とした測定方法および形状データのパラメータ化に関する研究"精密工学会春季大会講演論文集. 507 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Hara et al.: "An in-line digital filtering algorithm for surface roughness profile"PRECISION ENGINEERING. 22・4. 190-195 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] HARA, Seiichiro, KAMIMURA, Tomohiro and YANAGI, Kazuhisa: "Development of Surface Profile Measuring Instrument for Magnetic Rigid Disk and Micro-waviness Assessment (in Japanese)"Journal of Japanese Society of Tribologist. Vol. 45, No. 3. 246-252 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] YANAGI, Kazuhisa et al.: "On a relationship between disk micro-waviness and electro-magnetic conversion characteristics (in Japanese)"IDEMA Japan News. No. 33. 9-14 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] HARA, Seiichiro and YANAGI, Kazuhisa: "Measurement and assessment of disk micro-waviness (in Japanese)"IDEMA Japan News. No. 29. 6-9 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 原 精一郎ほか2名: "ハードディスク記録媒体の表面形状記述に関する考察と提案"トライボロジー会議予稿集. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 原 精一郎ほか2名: "磁気ディスクを対象とした輪郭形状測定装置の開発と微小うねり評価法"トライボロジスト(日本トライボロジー学会誌). 45・3. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 柳 和久ほか4名: "Microwaviness-測定法および電磁変換特性との関係について-"IDEMA Japan News(国際ディスクドライブ協会誌). 33. 9-15 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 原 誠一郎、柳和久: "Micro-wavinessの測定と評価の試み"IDEAM Japan News. 29. 6-9 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 原 精一郎ほか3名: "磁気ディスクの輪郭うねりを対象とした測定方法および形状データのパラメータ化に関する研究"精密工学会春季大会講演論文集. 507 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Hara et al.: "An in-line digital filtering algorithm for surface roughness profile"PRECISION ENGINEERING. 22・4. 190-195 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Hara et al.: "An in -line digital filtering algorithm for surface roughness profile" PRECISION ENGINEERING. 22・4. 190-195 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 原精一郎他3名: "共焦点光学系の走査型レーザ顕微鏡による表面凹凸形状測定と機能的ディジタルフィルタ処理" 精密工学会誌. 64・5. 710-714 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 明田川正人他7名: "結晶格子を基準とする微小長さ測定(第3報)" 精密工学会誌. 65・1. 121-125 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 原精一郎他3名: "磁気ディスクの輪郭うねりを対象とした測定方法および形状データのパラメータ化に関する研究" 1999年度精密工学会春季大会講演論文集. 発表予定. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田村真,矢鍋重夫: "ハードディスクスライダアセンブリの挙動解析" 日本機械学会北陸信越支部第36期総会講演会. 発売予定. (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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