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Elucidation of Cu diffusion barrier mechanism and control of Cu diffusion coefficient in W-atom-encapsulated Si cage clusters film

Research Project

Project/Area Number 18K13794
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

OKADA NAOYA  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 主任研究員 (10717234)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
KeywordsCVD / シリサイド / トランジスタ / クラスター / 信頼性 / 拡散 / 金属接合 / 拡散バリア / 遷移金属内包シリコンクラスター / 半導体 / Cu / デバイス
Outline of Final Research Achievements

A new thin film, "Amorphous silicide film (WSin film) in which tungsten (W) atom-encapsulating silicon (Si) clusters (WSin, n: 6 to 12) are randomly arranged", has excellent barrier properties against Cu diffusion. In this study, we obtained positive proof of the Cu diffusion barrier mechanism in the WSin film. Furthermore, we controlled the Cu diffusion by selecting the Si composition n of the WSin film. In particular, it has been clarified that n = 8 and 12 are effective as a Cu diffusion barrier film, and in the WSin film, the constituent W and Si atoms form a strong covalent bond, resulting in excellent thermal structural stability; therefore, the diffusion of Cu and Co atoms can be suppressed.

Academic Significance and Societal Importance of the Research Achievements

本研究ではWSin膜の材料組成の選択による拡散制御を実証した。これは、既存のシリコン材料科学では成し得ない物性であり、学術的に意義のある成果である。さらに、本研究では、WSin膜が、Si-CMOSのソース/ドレイン抵抗を低減するためのコンタクト材料および金属拡散バリア膜として有用であることを示した。これは、微細Si-CMOS回路の高性能化を可能とする新しい材料プロセス技術としても意義のある成果である。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (14 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results) Patent(Industrial Property Rights) (2 results) (of which Overseas: 2 results)

  • [Journal Article] Cluster-Preforming-Deposited Si-rich W Silicide: A New Contact Material for Advanced CMOS2019

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Journal Title

      ECS Transactions

      Volume: 89 Issue: 3 Pages: 155-164

    • DOI

      10.1149/08903.0155ecst

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gas-phase reactions of WF6 with SiH4 for deposition of WSin films free from powder formation2019

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SB Pages: SBBA09-SBBA09

    • DOI

      10.7567/1347-4065/ab01d4

    • NAID

      210000135447

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] New Contact Material for Advanced CMOS: Cluster-Preforming-Deposited Amorphous Si-rich W Silicide Film2019

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Organizer
      235th ECS Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A New Cobalt Contact Structure Using Amorphous Si-Rich W Silicide Films2019

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Organizer
      IEEE-IITC
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cluster-Preforming-Deposited Si-rich W Silicide: A New Contact Material in CMOS for Edge AI Systems2019

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Organizer
      JST-MOST Joint Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cu Barrier Properties of Cluster-Preforming-Deposited Amorphous WSin Films Depending on Composition n2019

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Organizer
      International interconnect technology conference (IEEE-IITC) 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 微細CMOS向け新コンタクト材料:クラスター気相合成法で形成したSiリッチWシリサイド膜2019

    • Author(s)
      岡田 直也
    • Organizer
      Siテクノロジ分科会配線研究会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] アモルファスWSin膜の実効仕事関数2019

    • Author(s)
      岡田 直也、内田 紀行、小川 真一、金山 敏彦
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 微細CMOS向け新コンタクト材料:クラスター気相合成法で形成したWSin (n=12)膜2018

    • Author(s)
      岡田 直也
    • Organizer
      第82回半導体集積回路技術シンポジウム
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Identification of different gas-phase reaction modes of WF6 with SiH4 for deposition of WSin films: powder formation and WSin cluster synthesis2018

    • Author(s)
      Naoya Okada, Noriyuki Uchida, Shinichi Ogawa, and Toshihiko Kanayama
    • Organizer
      International Conference on Solid State Devices and Materials (SSDM) 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] アモルファスWSinバリア膜とCuの反応性:組成比n依存性2018

    • Author(s)
      岡田 直也、内田 紀行、小川 真一、金山 敏彦
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] クラスター気相合成法で形成したSiリッチWシリサイド薄膜による微細CMOS向けコンタクト形成技術2018

    • Author(s)
      岡田 直也
    • Organizer
      電気学会「次世代化合物半導体デバイスの機能と応用調査専門委員会」
    • Related Report
      2018 Research-status Report
  • [Patent(Industrial Property Rights)] 半導体装置及びその製造方法2018

    • Inventor(s)
      岡田直也、内田紀行、金山敏彦
    • Industrial Property Rights Holder
      産業技術総合研究所
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2018 Research-status Report
    • Overseas
  • [Patent(Industrial Property Rights)] 導電性積層体及び電子素子2018

    • Inventor(s)
      岡田直也、内田紀行、小川真一、金山敏彦
    • Industrial Property Rights Holder
      産業技術総合研究所
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2018 Research-status Report
    • Overseas

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Published: 2018-04-23   Modified: 2021-02-19  

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