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Ultraprecise dimensional measurement of semiconductor nanostructures

Research Project

Project/Area Number 19K14865
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 18020:Manufacturing and production engineering-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Kizu Ryosuke  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (40760294)

Project Period (FY) 2019-04-01 – 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 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords粗さ計測 / ラインエッジラフネス(LER) / 原子間力顕微鏡(AFM) / 走査電子顕微鏡(SEM) / ナノ構造 / ラインエッジラフネス(LER) / 原子間力顕微鏡(AFM) / 走査電子顕微鏡(SEM) / AFM / 半導体ナノ構造
Outline of Research at the Start

ナノ形状計測では様々な顕微鏡技術が用いられるが、それらの計測精度の保証には絶対精度の計測値が値付けされた標準試料が必要となる。本研究の目的は、半導体デバイス製造における計測標準に資する半導体ナノ構造の超精密形状計測技術開発である。特に、デバイス製造に欠かせないラインエッジラフネス(LER、ラインパターンの側壁粗さ)の高精度な計測技術と、高精度に値付けされたLER標準試料の開発を行う。

Outline of Final Research Achievements

This study focused on the measurement technique of the shape parameter indicating the sidewall roughness information of nanoscale line patterns, called line edge roughness (LER). LER is essential for the performance evaluation of semiconductor devices and process technologies in lithography technology. We proposed and fabricated an LER standard sample whose roughness shape is characterized with high accuracy. As a result of the experimental verification, it was confirmed that the fabricated sample reflected the roughness shape according to the design, and the feasibility of the LER standard sample was demonstrated. We also carried out an enhancement of the LER measurement technique using an atomic force microscope. As a result, high-precision measurement of the sidewall shape of resist patterns and quantitative evaluation of shrinkage deformation during electron beam exposure, which had been difficult with conventional techniques, became possible.

Academic Significance and Societal Importance of the Research Achievements

半導体デバイスは様々な産業の情報化のための基幹部品として継続的な性能向上が求められている。一方で、半導体デバイス製造の技術難度は年々高まっており、トランジスタ構造の微細化・複雑化に伴って計測要求も一層高まっている。その中で、LERは先端的なリソグラフィ技術の研究開発における重要な評価値である。本研究で提案したLER標準試料は、ランダム性をもちながらも既知である粗さ情報を提供でき、次世代LER計測の基盤技術として応用が期待できる。また、AFMによる高精度LER計測技術は従来難しかった高精度かつ3Dで側壁を計測でき、各種プロセス(リソグラフィ、エッチング等)のメカニズム解明への応用が期待できる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 2020

All Journal Article (6 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Enhancing the precision of 3D sidewall measurements of photoresist using atomic force microscopy with a tip-tilting technique2023

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Journal Title

      Journal of Applied Physics

      Volume: 133 Issue: 6 Pages: 065302-065302

    • DOI

      10.1063/5.0130459

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photoresist shrinkage observation by a metrological tilting-AFM2023

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Journal Title

      Proc. SPIE

      Volume: 12496 Pages: 1249605-1249605

    • DOI

      10.1117/12.2655566

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Unbiased line edge roughness measurement using profile-averaging method for precise roughness parameters measurement2022

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Journal Title

      Journal of Micro/Nanopatterning, Materials, and Metrology

      Volume: 21 Issue: 02 Pages: 024001-024001

    • DOI

      10.1117/1.jmm.21.2.024001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluating SEM-based LER metrology using a metrological tilting-AFM2021

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Journal Title

      Proc. SPIE

      Volume: 11611 Pages: 1161117-1161117

    • DOI

      10.1117/12.2583475

    • Related Report
      2020 Research-status Report
  • [Journal Article] Direct comparison of line edge roughness measurements by SEM and a metrological tilting-atomic force microscopy for reference metrology2020

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Journal Title

      Journal of Micro/Nanolithography, MEMS, and MOEMS

      Volume: 19 Issue: 04 Pages: 044001-044001

    • DOI

      10.1117/1.jmm.19.4.044001

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of SEM and AFM performances for LER reference metrology2020

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Journal Title

      Proc. of SPIE

      Volume: 11325 Pages: 21-21

    • DOI

      10.1117/12.2551468

    • Related Report
      2019 Research-status Report
  • [Presentation] Photoresist shrinkage observation by a metrological tilting-AFM2023

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Organizer
      SPIE Advanced Lithography+Patterning 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-resolution sidewall observation and LER measurement of a photoresist pattern by a metrological tilting-AFM2022

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Organizer
      SPIE Advanced Lithography+Patterning 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ラインエッジラフネスが制御されたシリコンラインパターンの作製と評価2022

    • Author(s)
      木津良祐、三隅伊知子、平井亜紀子、権太聡、高橋哲
    • Organizer
      2022年度精密工学会春季大会学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 傾斜探針型測長原子間力顕微鏡によるラインエッジラフネスの参照計測2021

    • Author(s)
      木津良祐、三隅伊知子、平井亜紀子、権太聡
    • Organizer
      次世代リソグラフィワークショップ 2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Evaluating SEM-based LER metrology using a metrological tilting-AFM2021

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Organizer
      SPIE Advanced Lithography 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Comparison of SEM and AFM performances for LER reference metrology2020

    • Author(s)
      Kizu Ryosuke、Misumi Ichiko、Hirai Akiko、Gonda Satoshi
    • Organizer
      SPIE Advanced Lithography 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 粗さ解析のための方法及び情報処理システム2021

    • Inventor(s)
      木津良祐
    • Industrial Property Rights Holder
      国立研究開発法人産業技術総合研究所
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-112800
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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