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Optimal design method for high-performance polishing pads based on the homogenization method

Research Project

Project/Area Number 20K14636
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 18030:Design engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Noguchi Yuki  東京大学, 大学院工学系研究科(工学部), 助教 (00845448)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsトポロジー最適化 / 均質化法 / トポロジー導関数 / レイノルズ方程式 / 有限要素法 / レベルセット法 / 研磨加工 / EHL解析 / 最適設計
Outline of Research at the Start

本研究では,研磨加工法における研磨性能の向上を目的とし,研磨加工機の構成要素である研磨パッドの表面形状を対象とした創成設計法をトポロジー最適化法に基づき構築する.このために,漸近展開に基づく均質化法を導入した流体構造連成解析法を構築し,研磨加工を対象とした数値解析手法へと展開する.このような方法論が確立されれば,従来は設計者の勘や経験に基づき作製されてきた研磨パッド形状の具体的な最適設計案が得られ,研磨加工性能の抜本的な向上が見込まれるのみではなく,加工対象である半導体デバイス等の各種デバイスの性能向上が期待できる.

Outline of Final Research Achievements

In this research, we developed an optimal design method for polishing pads in the polishing process. In particular, we proposed a homogenization method to efficiently evaluate the pressure distribution for the structures with fine surface shapes, such as the textured structure of the polishing pad. By combining the proposed homogenization method and a topology optimization method, we could conduct optimal design of microscopic surface shapes to achieve the desired macroscopic pressure response. In addition, we constructed a topology optimization method for the fluid lubrication problem based on the Reynolds equation for a situation in which fluids such as water or lubricating oil are interposed between the wafer and polishing pad to be polished to reduce friction.

Academic Significance and Societal Importance of the Research Achievements

近年、半導体デバイスや光学レンズ等、様々な部品の高精度化が進んでいる中、超精密研磨の需要が高まっている。研磨パッドは、研磨加工機の構成要素の中でもスラリーの保持や研磨屑を除去する役割を持ち、研磨面の仕上がりに強い影響を持つ。本研究で開発したトポロジー最適化法を研磨パッドの最適設計に援用することで、研磨性能の抜本的な向上のみではなく、パッドの多機能化や研磨プロセスの高効率化を目的としたパッド形状の具体的な設計案の創出が可能となる。研磨対象である半導体デバイスの微細化や大面積化がますます進んでいく中で、研磨加工機の高性能化や高効率化は重要な課題であり、本研究はものづくりに大きく貢献できると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Multiscale topology optimization of electromagnetic metamaterials using a high-contrast homogenization method2023

    • Author(s)
      Murai Naoki、Noguchi Yuki、Matsushima Kei、Yamada Takayuki
    • Journal Title

      Computer Methods in Applied Mechanics and Engineering

      Volume: 403 Pages: 115728-115728

    • DOI

      10.1016/j.cma.2022.115728

    • Related Report
      2022 Annual Research Report
  • [Journal Article] 流体潤滑問題を対象としたレベルセット法に基づくトポロジー最適化2022

    • Author(s)
      野口悠暉、松島慶、山田崇恭
    • Journal Title

      計算数理工学論文集

      Volume: 22 Pages: 123-130

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Topology Optimization for Acoustic Structures Without Floating Components2022

    • Author(s)
      Noguchi Yuki、Ohta Yusei、Matsushima Kei、Yamada Takayuki
    • Journal Title

      Proceedings of ASME 2022 International Mechanical Engineering Congress & Exposition

      Volume: - Pages: 1-7

    • DOI

      10.1115/imece2022-94365

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Topology optimization of acoustic metasurfaces by using a two-scale homogenization method2021

    • Author(s)
      Noguchi Yuki、Yamada Takayuki
    • Journal Title

      Applied Mathematical Modelling

      Volume: 98 Pages: 465-497

    • DOI

      10.1016/j.apm.2021.05.005

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Level set-based topology optimization for graded acoustic metasurfaces using two-scale homogenization2021

    • Author(s)
      Yuki Noguchi, Takayuki Yamada
    • Journal Title

      Finite Elements in Analysis and Design

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 流体潤滑問題を対象としたレベルセット法に基づくトポロジー最適化2022

    • Author(s)
      野口悠暉、松島慶、山田崇恭
    • Organizer
      計算数理工学シンポジウム2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Topology Optimization for Acoustic Structures Without Floating Components2022

    • Author(s)
      Noguchi Yuki、Ohta Yusei、Matsushima Kei、Yamada Takayuki
    • Organizer
      International Mechanical Engineering Congress and Exposition (IMECE2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Topology optimization for two-layered acoustic metasurfaces based on a two-scale homogenization method2021

    • Author(s)
      Yuki Noguchi, Takayuki Yamada
    • Organizer
      14th World Congress of Structural and Multidisciplinary Optimization (WCSMO14)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 境界層効果を考慮した音響構造体のトポロジー最適化2021

    • Author(s)
      野口悠暉,山田崇恭
    • Organizer
      第31回設計工学・システム部門講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 逐次線形化ナビエ・ストークスモデルに基づく吸音構造を対象としたトポロジー最適化2021

    • Author(s)
      野口悠暉,山田崇恭
    • Organizer
      第34回計算力学講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Topology optimization and sensitivity analysis for the design of acoustic metasurfaces using the homogenization method2020

    • Author(s)
      Yuki Noguchi, Takayuki Yamada
    • Organizer
      Asian Congress of Structural and Multidisciplinary Optimization 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 均質化法を用いたレベルセット法に基づく音響メタサーフェスのトポロジー最適化2020

    • Author(s)
      野口悠暉,山田崇恭
    • Organizer
      第30回設計工学・システム部門講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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