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The realization of steep slope tunnel FET on Ge-on-Insulator substrate

Research Project

Project/Area Number 19K15028
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionKyushu University

Principal Investigator

YAMAMOTO Keisuke  九州大学, 総合理工学研究院, 助教 (20706387)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsゲルマニウム / トンネルFET / Ge-on-Insulator / 移動度
Outline of Research at the Start

本研究では、大規模集積回路の超低消費電力化を目指し、代表者がこれまでに構築してきた独自技術である「金属/(ゲルマニウム)Ge接合の障壁の広範制御」を活用した、非対称メタル・ソース/ドレイン(S/D)をベースとするGe Steep Slope トンネルFET(TFET)を実証する。この構造は、一般的なpn接合では不可能な急峻なソース/チャネル構造が実現でき、室温での低電圧動作が可能となる。既知の課題を解決する技術を新たに開発(Ge-on-Insulator(GOI)基板の高品質化、不純物偏析による極薄高濃度領域形成)し、現行CMOSの半分(~0.5 V)の低電圧・低消費電力駆動を実証する。

Outline of Final Research Achievements

We studied fundamental process technologies for “Ge tunnel field-effect transistor (FET)” which works by novel operation principle for the realization of large scale integration with ultra-low power consumption. Specifically, the following three topics were researched; “1. High-quality Ge-on-Insulator fabrication”, “2. Fabrication of high-quality Ge gate stack at low temperature”, and “3. Consideration of device structure for improvement of current drivability”. We achieved the following fruits for each topic; “1. Etchback process establishment for GOI fabrication”, “2. Low-temperature wet oxidation of yttrium for high-quality gate stack”, and “3. Current drivability improvement by introduction of recessed channel structure”.

Academic Significance and Societal Importance of the Research Achievements

情報通信需要の爆発的増加に伴い、電子機器を構成する集積回路の超低消費電力化が切望されている。本課題はこの社会的要請に応えるべく、低消費電力を達成可能なTFETの実現を目指した研究である。Si基板上への集積化を念頭に置いてIV元素であるGeを対象材料としており、将来的な実用化も意識している点で社会的な意義も大きい。
代表者のオリジナルである金属/Ge接合の電子・正孔障壁技術をキャリア注入に応用している点が特徴の一つである。また、本研究で得られたGOI作製・低温ゲートスタック・キャリア注入の高効率化は、TFET以外のGe応用デバイスへも展開が可能で、この点でも学術的・社会的意義を有していると考える。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (25 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results) Presentation (15 results) (of which Int'l Joint Research: 10 results,  Invited: 5 results) Remarks (4 results)

  • [Int'l Joint Research] 上海微系統情報技術研究所(中国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Schottky Barrier Height Control at Metal/Ge Interface by Insertion of Nitrogen Contained Amorphous Layer2021

    • Author(s)
      Keisuke Yamamoto, Dong Wang, Hiroshi Nakashima
    • Journal Title

      ECS transactions

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interface trap and border trap characterization for Al2O3/GeOx/Ge gate stacks and influence of these traps on mobility of Ge p-MOSFET2020

    • Author(s)
      Wei-Chen Wen, Yuta Nagatomi, Hiroshi Akamine, Keisuke Yamamoto, Dong Wang, Hiroshi Nakashima
    • Journal Title

      AIP Advances

      Volume: 10 Issue: 6 Pages: 065119-065119

    • DOI

      10.1063/5.0002100

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Border-Trap Characterization for Ge Gate Stacks with Thin GeOX layer Using Deep-Level Transient Spectroscopy2020

    • Author(s)
      Hiroshi Nakashima, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang
    • Journal Title

      ECS transactions

      Volume: 98 Pages: 395-404

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Conduction Type Control of Ge-on-Insulator: Combination of Smart-Cut(TM) and Defect Elimination2019

    • Author(s)
      Keisuke Yamamoto, Kohei Nakae, Hiroshi Akamine, Dong Wang, Hiroshi Nakashima, Md. M Alam, Kentarou Sawano, Zhongying Xue, Miao Zhang, Zengfeng Di
    • Journal Title

      ECS transactions

      Volume: 93 Issue: 1 Pages: 73-77

    • DOI

      10.1149/09301.0073ecst

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Border-Trap Characterization for Ge Gate Stacks Using Deep-Level Transient Spectroscopy2019

    • Author(s)
      Hiroshi Nakashima, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang
    • Journal Title

      ECS transactions

      Volume: 92 Issue: 4 Pages: 3-10

    • DOI

      10.1149/09204.0003ecst

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Schottky Barrier Height Control at Metal/Ge Interface by Insertion of Nitrogen Contained Amorphous Layer2021

    • Author(s)
      Keisuke Yamamoato, Dong Wang, Hiroshi Nakashima
    • Organizer
      239th ECS meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DLTS法によるGeゲートスタック中のトラップ解析2021

    • Author(s)
      中島 寛, Wei-Chen Wen, 山本 圭介, 王 冬
    • Organizer
      第26回 電子デバイス界面テクノロジー研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] エッチバック法を用いたGe-on-Insulator作製に向けたウェットエッチング法の検討2021

    • Author(s)
      清水 昇, 山本 圭介, 王 冬, 中島 寛
    • Organizer
      2021年第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Border-Trap Characterization for Ge Gate Stacks with Thin GeOX layer Using Deep-Level Transient Spectroscopy2020

    • Author(s)
      Hiroshi Nakashima, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang
    • Organizer
      PRiME 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Isotropic Wet Etching and Improving Surface Flatness of Ge for Etchback Ge-on-Insulator Fabrication2020

    • Author(s)
      Noboru Shimizu, Keisuke Yamamoto, Dong Wang, Hiroshi. Nakashima
    • Organizer
      PRiME 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermally Oxidized Yttrium and Scandium Gate Dielectrics on Germanium with High Interfacial and Film Qualities2020

    • Author(s)
      Hiroki Kanakogi, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang, Hiroshi Nakashima
    • Organizer
      2020 International Conference on Solid State Device and Materials
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Border-Trap Evaluation for SiO2/GeO2/Ge Gate Stacks Using Deep-Level Transient Spectroscopy2019

    • Author(s)
      Hiroshi Nakashima, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang
    • Organizer
      8th International Symposium on Control of Semiconductor Interfaces (ISCSI-VIII)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Study on Position of Border Traps in Al2O3/GeOx/p-Ge Gate Stacks Using Deep-Level Transient Spectroscopy2019

    • Author(s)
      Wei-Chen Wen, Hiroshi Nakashima, Keisuke Yamamoto, Dong Wang
    • Organizer
      8th International Symposium on Control of Semiconductor Interfaces (ISCSI-VIII)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Border-Trap Characterization for Ge Gate Stacks Using Deep-Level Transient Spectroscopy2019

    • Author(s)
      Hiroshi Nakashima, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang
    • Organizer
      236th ECS meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Low temperature (<300oC Fabrication of Ge MOS Structure for Advanced Electronic Devices2019

    • Author(s)
      Kento Iseri, Wei-Chen Wen, Keisuke Yamamoto, Dong Wang, Hiroshi Nakashima
    • Organizer
      2019 International Conference on Solid State Device and Materials (SSDM 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Border Trap Evaluation for Al2O3/GeOX/p-Ge Gate Stacks using Deep-Level Transient Spectroscopy2019

    • Author(s)
      Wei-Chen Wen, Keisuke Yamamoto, Dong Wang, Hiroshi Nakashima
    • Organizer
      2nd Joint ISTDM / ICSI 2019 Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Conduction Type Control of Ge-on-Insulator: Combination of Smart-Cut and Defect Elimination2019

    • Author(s)
      Keisuke Yamamoto, Kohei Nakae, Hiroshi Akamine, Dong Wang, Hiroshi Nakashima, Md. M Alam, Kentarou Sawano, Zhongying Xue, Miao Zhang, Zengfeng Di
    • Organizer
      2nd Joint ISTDM / ICSI 2019 Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ge-on-Insulator基板上へのMOSデバイスの作製と評価2019

    • Author(s)
      清水 昇, 山本 圭介, 王 冬, 中島 寛
    • Organizer
      2019年(令和元年度)応用物理学会九州支部学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Evaluation of Border Traps in Al2O3/GeOx/p-Ge Stacks Using Deep-Level Transient Spectroscopy2019

    • Author(s)
      Wei-Chen Wen, Keisuke Yamamoto, Dong Wang, Hiroshi Nakashima
    • Organizer
      2019年第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 新規電子デバイス応用に向けたGeゲートスタックの低温(<300°C)形成2019

    • Author(s)
      井芹 健人, 温 偉辰, 山本 圭介, 王 冬, 中島 寛
    • Organizer
      2019年第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Remarks] 九州大学大学院総合理工学研究院 機能デバイス工学研究室

    • URL

      http://www.gic.kyushu-u.ac.jp/nakasima/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 九州大学研究者情報

    • URL

      https://hyoka.ofc.kyushu-u.ac.jp/search/details/K004917/index.html

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Remarks] 九州大学研究者情報(英文)

    • URL

      https://hyoka.ofc.kyushu-u.ac.jp/search/details/K004917/english.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 九州大学グローバルイノベーションセンター 中島・王研究室

    • URL

      http://www.gic.kyushu-u.ac.jp/nakasima/

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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