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2016 Fiscal Year Annual Research Report

Developments of high mobility uniaxially strained Germanium channel devices

Research Project

Project/Area Number 26286044
Research InstitutionTokyo City University

Principal Investigator

澤野 憲太郎  東京都市大学, 工学部, 教授 (90409376)

Project Period (FY) 2014-04-01 – 2017-03-31
Keywords結晶工学 / 歪み制御 / 歪みゲルマニウム / 一軸歪み
Outline of Annual Research Achievements

選択的イオン注入手法によって、一軸歪みGe膜を形成し、歪み状態のパターン幅依存性を調べた。線幅を数μm程度に小さくしていくことで、イオン注入領域と非注入領域のラマンシフトの差が小さくなっていくことが確認され、両領域の歪み状態が互いに影響し、歪みの一軸性が強くなることが明らかとなった。液浸ラマン分光法や放射光XPS解析によってもこれは確認された。
また、一軸歪みGOI作製プロセスとして重要となるいくつかの要素技術を確立した。まずGOIの薄膜化のために、SiGeエッチングストップ層を導入する手法を開発し、条件の最適化によって50nmと薄膜かつ面内均一なGOI形成に成功した。また、一軸歪み導入後に貼り合わせを行う新手法を検討した。そのために、SiGe層成長後に、SiGeの上からSi/SiGeヘテロ界面に欠陥を導入する方法を新たに試みた。ラマン分光法によって詳細に評価した結果、本手法においても歪み分布制御が可能であることが分かった。さらに、貼り合わせを行う前に、SiGeおよびGeをパターニングすることで、Siのエッチング溶液を直接Si/SiGe界面に注入することを可能とし、Si基板を切り離す手法に成功した。これにより、Si基板を全て研磨エッチングする工程を省略でき、さらに一軸性歪みSiGeのプロセスと融合することが可能となった。
一軸歪みGOI-MOSFETデバイスに向けて、最重要となるゲート絶縁膜形成について、原子層堆積法(ALD)による高品質Al2O3膜形成を検討した。特に、MBEチャンバーを改造することで、エピタキシャル成長後、ALD装置に基板を直接真空中搬送し、そのままALDを行った。その結果、界面が完全に清浄な状態でAl2O3膜を堆積することが可能となり、成長膜厚の正確な制御、電気特性の向上が確認された。これにより、高移動度化へ向けた最適プロセスが示されたと言える。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Causes of Carryover

28年度が最終年度であるため、記入しない。

Expenditure Plan for Carryover Budget

28年度が最終年度であるため、記入しない。

  • Research Products

    (24 results)

All 2017 2016

All Journal Article (9 results) (of which Peer Reviewed: 9 results,  Acknowledgement Compliant: 8 results) Presentation (15 results) (of which Int'l Joint Research: 15 results,  Invited: 4 results)

  • [Journal Article] Light emission enhancement from Ge quantum dots with phosphorous δ-doped neighboring confinement structures2017

    • Author(s)
      K. Sawano, T. Nakama, K. Mizutani, N. Harada, X. Xu, T. Maruizumi
    • Journal Title

      Journal of Crystal Growth

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1016/j.jcrysgro.2017.03.008

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] TEM Observation of Si0.99C0.01 Thin Films with Arsenic-Ion-, Boron-Ion-, and Silicon-Ion-Implantation Followed by Rapid Thermal Annealing2017

    • Author(s)
      Junji Yamanaka, Shigenori Inoue, Keisuke Arimoto, Kiyokazu Nakagawa, Kentarou Sawano, Yasuhiro Shiraki, Atsushi Moriya, Yasuhiro Inokuchi, Yasuo Kunii
    • Journal Title

      Journal of Materials Science and Chemical Engineering

      Volume: 5 Pages: 15-25

    • DOI

      10.4236/msce.2017.51003

    • Peer Reviewed
  • [Journal Article] Highly n-doped germanium-on-insulator microdisks with circular Bragg gratings2017

    • Author(s)
      Xuejun Xu, Hideaki Hashimoto, Kentarou Sawano, and Takuya Maruizumi
    • Journal Title

      Optics Express

      Volume: 25 Pages: 6550-6560

    • DOI

      10.1364/OE.25.006550

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Thermal stability of compressively strained Si/relaxed Si1-xCx heterostructures formed on Ar ion implanted Si (100) substrates2017

    • Author(s)
      You Arisawa, Yusuke Hoshi, Kentarou Sawano, Junji Yamanaka, Keisuke Arimoto, Chiaya Yamamoto, Noritaka Usami
    • Journal Title

      Materials Science in Semiconductor Processing

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1016/j.mssp.2016.11.024

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Study on ion implantation conditions in fabricating compressively strained Si/relaxed Si1−xCx heterostructures using the defect control by ion implantation technique2017

    • Author(s)
      You Arisawa, Kentarou Sawano, Noritaka Usami
    • Journal Title

      Journal of Crystal Growth

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1016/j.jcrysgro.2016.12.065

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Straining of Group IV Semiconductor Materials for Bandgap and Mobility Engineering2016

    • Author(s)
      Kentarou Sawano, Xuejun Xu, Shiori Konoshima, Nayuta Shitara, Takeshi Ohno, and Takuya Maruizumi
    • Journal Title

      ECS transaction

      Volume: 75 Pages: 191-197

    • DOI

      10.1149/07504.0191ecst

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Anisotropic Strain Introduction into Si/Ge Hetero Structures2016

    • Author(s)
      Kentarou Sawano, Shiori Konoshima, Junji Yamanaka, Keisuke Arimoto, and Kiyokazu Nakagawa
    • Journal Title

      ECS transaction

      Volume: 75 Pages: 563-569

    • DOI

      10.1149/07508.0563ecst

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Suppression of segregation of the phosphorus δ-doping layer in germanium by incorporation of carbon2016

    • Author(s)
      Michihiro Yamada, Kentarou Sawano, Masashi Uematsu, Yasuo Shimizu, Koji Inoue, Yasuyoshi Nagai, and Kohei M. Itoh
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 55 Pages: 031304-1~5

    • DOI

      10.7567/JJAP.55.031304

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Enhanced light emission from germanium microdisks on silicon by surface passivation through thermal oxidation2016

    • Author(s)
      Xuejun Xu, Hideaki Hashimoto, Kentarou Sawano, Hiroshi Nohira, and Takuya Maruizumi
    • Journal Title

      Applied Physics Express

      Volume: 9 Pages: 052101-1~4

    • DOI

      10.7567/APEX.9.052101

    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Anisotropic strain engineering of Si/Ge heterostructures2016

    • Author(s)
      Kentarou Sawano
    • Organizer
      2016 Global Research Efforts on Energy and Nanomaterials (GREEN 2016)
    • Place of Presentation
      Taipei, Taiwan
    • Year and Date
      2016-12-24 – 2016-12-24
    • Int'l Joint Research / Invited
  • [Presentation] Straining of Group IV Semiconductor Materials for Bandgap and Mobility Engineering2016

    • Author(s)
      Kentarou Sawano
    • Organizer
      Pacific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2016-10-02 – 2016-10-07
    • Int'l Joint Research / Invited
  • [Presentation] Anisotropic Strain Introduction into Si/Ge Hetero Structures2016

    • Author(s)
      Kentarou Sawano
    • Organizer
      Pacific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2016-10-02 – 2016-10-07
    • Int'l Joint Research / Invited
  • [Presentation] Enhanced Light Emission from N-Doped Ge Microdisks by Thermal Oxidation2016

    • Author(s)
      H. Hashimoto, X. Xu, K. Sawano, T. Maruizumi
    • Organizer
      Pacific Rim Meeting on Electrochemical and Solid-State Science (PRiME 2016)
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2016-10-02 – 2016-10-07
    • Int'l Joint Research
  • [Presentation] Light Emission Enhancement from Ge Quantum Dots with Phosphorous delta-Doping2016

    • Author(s)
      K. Sawano, K. Mizutani, K. Watanabe, X. Xu, T. Maruizumi
    • Organizer
      19th International Conference on Molecular Beam Epitaxy (MBE 2016)
    • Place of Presentation
      Montpellier, France
    • Year and Date
      2016-09-04 – 2016-09-09
    • Int'l Joint Research
  • [Presentation] Fabrication of high-quality strain relaxed SiGe(110) films by controlling defects via ion implantation2016

    • Author(s)
      M. Kato, T. Murakami, K. Arimoto, J. Yamanaka, K. Nakagawa, K, Sawano
    • Organizer
      19th International Conference on Molecular Beam Epitaxy (MBE 2016)
    • Place of Presentation
      Montpellier, France
    • Year and Date
      2016-09-04 – 2016-09-09
    • Int'l Joint Research
  • [Presentation] Highly N-doped Ge Microdisks with Circular Bragg Gratings on Ge-on-Insulator2016

    • Author(s)
      H. Hashimoto, X. Xu, K. Sawano, T. Maruizumi
    • Organizer
      19th International Conference on Molecular Beam Epitaxy (MBE 2016)
    • Place of Presentation
      Montpellier, France
    • Year and Date
      2016-09-04 – 2016-09-09
    • Int'l Joint Research
  • [Presentation] Study on ion implantation conditions in fabricating compressively strained Si/relaxed Si1-xCx heterostructures using the defect control by ion implantation technique2016

    • Author(s)
      Y.Arisawa, K. Sawano and N. Usami
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy (ICCGE-18)
    • Place of Presentation
      Nagoya Congress Center (Aichi)
    • Year and Date
      2016-08-07 – 2016-08-12
    • Int'l Joint Research
  • [Presentation] Influences of Phosphorous δ-Doping at Ge Quantum Dots / Si Interface on Photoluminescence Properties and Dot Formation2016

    • Author(s)
      K. Sawano, K. Watanabe, K. Mizutani, X. Xu, T. Maruizumi
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy (ICCGE-18)
    • Place of Presentation
      Nagoya Congress Center (Aichi)
    • Year and Date
      2016-08-07 – 2016-08-12
    • Int'l Joint Research
  • [Presentation] Fabrication of uniaxially strained Ge by selective ion implantation technique2016

    • Author(s)
      Shiori Konoshima, Eisuke Yonekura, Kentarou Sawano
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy (ICCGE-18)
    • Place of Presentation
      Nagoya Congress Center (Aichi)
    • Year and Date
      2016-08-07 – 2016-08-12
    • Int'l Joint Research
  • [Presentation] Hole Mobility in Strained Si/SiGe/Vicinal Si(110) Grown by Gas Source MBE2016

    • Author(s)
      K. Arimoto, S. Yagi, J. Yamanaka, K. Nakagawa, N. Usami, K. Sawano
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy (ICCGE-18)
    • Place of Presentation
      Nagoya Congress Center (Aichi)
    • Year and Date
      2016-08-07 – 2016-08-12
    • Int'l Joint Research
  • [Presentation] Strained Ge-on-Insulator Substrates toward Optoelectronic Integrated Circuits2016

    • Author(s)
      Kentarou Sawano
    • Organizer
      The International Conference on Small Science (ICSS 2016)
    • Place of Presentation
      Prague, Czech Republic
    • Year and Date
      2016-06-25 – 2016-06-29
    • Int'l Joint Research / Invited
  • [Presentation] Thermal Stability of Compressively Strained Si/Relaxed Si1-xCx Heterostructures Formed on Ar Ion Implanted Si (100) Substrates2016

    • Author(s)
      You Arisawa, Yusuke Hoshi, Kentarou Sawano, Junji Yamanaka, Keisuke Arimoto, Chiaya Yamamoto, Noritaka Usami
    • Organizer
      International SiGe Technology and Device Meeting 2016 (ISTDM2016)
    • Place of Presentation
      Nagoya University (Aichi)
    • Year and Date
      2016-06-07 – 2016-06-11
    • Int'l Joint Research
  • [Presentation] Formation of Strained Ge-on-Insulator (GOI) Substrates using SiGe Etching Stop Layers2016

    • Author(s)
      Yuuki Yajima, Yuta Ariyama, Kentarou Sawano
    • Organizer
      International SiGe Technology and Device Meeting 2016 (ISTDM2016)
    • Place of Presentation
      Nagoya University (Aichi)
    • Year and Date
      2016-06-07 – 2016-06-11
    • Int'l Joint Research
  • [Presentation] Control of Electrical Properties in Heusler-Alloy/Ge Schottky Tunnel Contacts formed by Phosphorous δ-Doping with Si-Layer Insertion2016

    • Author(s)
      Michihiro Yamada, Yuichi Fujita, Shinya Yamada, Kentarou Sawano, Kohei Hamaya
    • Organizer
      International SiGe Technology and Device Meeting 2016 (ISTDM2016)
    • Place of Presentation
      Nagoya University (Aichi)
    • Year and Date
      2016-06-07 – 2016-06-11
    • Int'l Joint Research

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Published: 2018-01-16  

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