Updated on 2026/03/03

写真a

 
WAKABAYASHI Hitoshi
 
Organization
Institute of Integrated Research Integrated Green-niX+ Research Unit Professor
Title
Professor
External link

Degree

  • Doctor of Engineering ( Tokyo Institute of Technology )

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment

Papers

  • Conformal deposition of WS2 layered film by low-temperature metal-organic chemical vapor deposition Reviewed

    K. Cho, N. Sawamoto, H. Machida, M. Ishikawa, H. Sudoh, H. Wakabayashi, R. Yokogawa, A. Ogura

    Japanese Journal of Applied Physics   62 ( SG )   SG1048 - SG1048   2023.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IOP Publishing  

    Abstract

    Large area multi-layer WS2 film has high potential as a channel material for MOSFETs in next-generation LSIs. State-of-the-art LSIs have complex three-dimensional (3D) structures such as vertical channels and multi-layer stacked channels surrounded by gate electrodes. To develop such structures, it is desirable to fabricate channel layers by CVD, which is suitable for conformal deposition along a substrate with a complicated 3D structure. In this study, we report on WS2 films deposited by Metal-Organic CVD using low-toxicity n-BuNC-W(CO)5 as a liquid tungsten precursor and (t-C4H9)2S2 for sulfur precursor. The deposited films have a roughly stoichiometric composition and are stable even after 60 d of shelf time in air atmosphere. A layered film along the 3D fin substrate parallel to the surface was fabricated on the entire structure.

    DOI: 10.35848/1347-4065/accb62

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    Other Link: https://iopscience.iop.org/article/10.35848/1347-4065/accb62/pdf

  • Chemical states of PVD-ZrS2 film underneath scaled high-k film with self-oxidized ZrO2 film as interfacial layer

    Masaki Otomo, Masaya Hamada, Ryo Ono, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    Japanese Journal of Applied Physics   62 ( SC )   SC1015 - SC1015   2023.1

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    Abstract

    Zirconium disulfide (ZrS2)—an attractive next-generation channel material because of its high mobility—is stabilized in the air by a zirconium dioxide (ZrO2) film which functions as a high-k film in MISFET. We fabricated high-k/PVD-ZrS2 stacks with a self-oxidized ZrO2 film as an interfacial layer; their chemical properties were analyzed to clarify how each fabrication process affects the ZrS2 under the oxide film. The results clarified that sulfur vapor annealing (SVA) is critical for fabricating high-quality physical vapor deposition (PVD) ZrS2 films and that the change in surface potential of the ZrS2 films due to interface dipoles between the high-k and Zr-compound films is suppressed with scaling of high-k thickness. The SVA with high-k films also prevents degradation of crystallinity and stoichiometry, enhancing the quality of the ZrS2 films without affecting their surface potential. These achievements enable us to control the threshold voltage in ZrS2 MISFETs.

    DOI: 10.35848/1347-4065/aca7cf

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    Other Link: https://iopscience.iop.org/article/10.35848/1347-4065/aca7cf/pdf

  • Doping-Free Complementary Metal-Oxide-Semiconductor Inverter Based on N-Type and P-Type Tungsten Diselenide Field-Effect Transistors With Aluminum-Scandium Alloy and Tungsten Oxide for Source/Drain Contact

    Takamasa Kawanago, Ryosuke Kajikawa, Kazuto Mizutani, Sung-Lin Tsai, Iriya Muneta, Takuya Hoshii, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    IEEE Journal of the Electron Devices Society   11   15 - 21   2023

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    Publishing type:Research paper (scientific journal)   Publisher:Institute of Electrical and Electronics Engineers (IEEE)  

    DOI: 10.1109/jeds.2022.3224206

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  • Ferromagnetism modulation by ultralow current in a two-dimensional polycrystalline molybdenum disulphide atomic layered structure

    Iriya Muneta, Takanori Shirokura, Pham Nam Hai, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    Scientific Reports   12 ( 1 )   2022.10

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media {LLC}  

    DOI: 10.1038/s41598-022-22113-3

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  • Minority carrier lifetime extraction methodology based on parallel pn diodes with a field plate

    M. Nishizawa, T. Hoshii, H. Wakabayashi, K. Tsutsui, Y. Daigo, I. Mizushima, T. Yoda, K. Kakushima

    Japanese Journal of Applied Physics   61 ( SH )   2022.7

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    DOI: 10.35848/1347-4065/ac6215

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  • Positive Seebeck coefficient of niobium-doped MoS2 film deposited by sputtering and activated by sulfur vapor annealing

    Taiga Horiguchi, Takuya Hamada, Masaya Hamada, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Tetsuya Tatsumi, Shigetaka Tomiya, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   61 ( 7 )   2022.7

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    DOI: 10.35848/1347-4065/ac7621

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  • Experimental demonstration of high-gain CMOS inverter operation at low V ( dd ) down to 0.5 V consisting of WSe2 n/p FETs

    Takamasa Kawanago, Takahiro Matsuzaki, Ryosuke Kajikawa, Iriya Muneta, Takuya Hoshii, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   61 ( SC )   2022.5

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    DOI: 10.35848/1347-4065/ac3a8e

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  • High Seebeck coefficient in PVD-WS2 film with grain size enlargement

    Takuya Hamada, Masaya Hamada, Taiga Horiguchi, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Tetsuya Tatsumi, Shigetaka Tomiya, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   61 ( SC )   2022.5

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    DOI: 10.35848/1347-4065/ac3a93

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  • Importance of crystallinity improvement in MoS2 film by compound sputtering even followed by post sulfurization

    Shinya Imai, Takuya Hamada, Masaya Hamada, Takanori Shirokura, Iriya Muneta, Kuniyuki Kakushima, Tetsuya Tatsumi, Shigetaka Tomiya, Kazuo Tsutsui, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   60 ( SB )   2021.5

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    DOI: 10.35848/1347-4065/abdcae

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  • Accurate TCAD simulation of trench-gate IGBTs and its application to prediction of carrier lifetime requirements for future scaled devices

    M. Watanabe, N. Shigyo, T. Hoshii, K. Furukawa, K. Kakushima, K. Satoh, T. Matsudai, T. Saraya, T. Takakura, I. Muneta, H. Wakabayashi, A. Nakajima, S. Nishizawa, K. Tsutsui, T. Hiramoto, H. Ohashi, H. Iwai

    2021 5th IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2021   2021.4

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Institute of Electrical and Electronics Engineers Inc.  

    DOI: 10.1109/EDTM50988.2021.9420922

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  • WS2 pMISFETs by Sputtering and Sulfur-Vapor Annealing with TiN/HfO2-Top-Gate-Stack, TiN Contact and Ultra-Thin Body and Box

    Takuya Hamada, Masaya Hamada, Satoshi Igarashi, Taiga Horiguchi, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Tetsuya Tatsumi, Shigetaka Tomiya, Hitoshi Wakabayashi

    2021 5TH IEEE ELECTRON DEVICES TECHNOLOGY & MANUFACTURING CONFERENCE (EDTM)   2021

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1109/EDTM50988.2021.9420925

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  • Sheet Resistance Reduction of MoS2 Film Using Sputtering and Chlorine Plasma Treatment Followed by Sulfur Vapor Annealing

    Takuya Hamada, Shigetaka Tomiya, Tetsuya Tatsumi, Masaya Hamada, Taiga Horiguchi, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY   9   278 - 285   2021

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/JEDS.2021.3050801

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  • WS2 Film by Sputtering and Sulfur-Vapor Annealing, and its pMISFET With TiN/HfO2 Top-Gate Stack, TiN Bottom Contact, and Ultra-Thin Body and Box

    Takuya Hamada, Masaya Hamada, Satoshi Igarashi, Taiga Horiguchi, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Tetsuya Tatsumi, Shigetaka Tomiya, Hitoshi Wakabayashi

    IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY   9   1117 - 1124   2021

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/JEDS.2021.3108882

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  • Hall-effect mobility enhancement of sputtered MoS(2)film by sulfurization even through Al(2)O(3)passivation film simultaneously preventing oxidation

    Masaya Hamada, Kentaro Matsuura, Takuro Sakamoto, Haruki Tanigawa, Iriya Muneta, Takuya Hoshii, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   59 ( 10 )   2020.10

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    DOI: 10.35848/1347-4065/abb324

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  • Normally-off sputtered-MoS(2)nMISFETs with TiN top-gate electrode all defined by optical lithography for chip-level integration

    Kentaro Matsuura, Masaya Hamada, Takuya Hamada, Haruki Tanigawa, Takuro Sakamoto, Atsushi Hori, Iriya Muneta, Takamasa Kawanago, Kuniyuki Kakushima, Kazuo Tsutsui, Atsushi Ogura, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   59 ( 8 )   2020.8

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    DOI: 10.35848/1347-4065/aba9a3

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  • Enhancement-mode accumulation capacitance-voltage characteristics in TiN/ALD-Al2O3/sputtered-MoS2 top-gated stacks

    Haruki Tanigawa, Kentaro Matsuura, Iriya Muneta, Takuya Hoshii, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   59   2020.7

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    DOI: 10.35848/1347-4065/ab7fea

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  • Enlargement of grain size for MoS2 film fabricated by RF magnetron sputtering with additional DC bias by optimization of deposition parameters and its evaluation with Raman spectroscopy

    Y. Oyanagi, Y. Hibino, N. Sawamoto, H. Wakabayashi, A. Ogura, A. Ogura

    Japanese Journal of Applied Physics   59 ( 6 )   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:{IOP} Publishing  

    DOI: 10.35848/1347-4065/ab9384

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  • Bipolar Transistor Test Structures for Extracting Minority Carrier Lifetime in IGBTs Reviewed

    Kiyoshi Takeuchi, Munetoshi Fukui, Takuya Saraya, Kazuo Itou, Toshihiko Takakura, Shinichi Suzuki, Yohichiroh Numasawa, Naoyuki Shigyo, Kuniyuki Kakushima, Takuya Hoshii, Kazuyoshi Furukawa, Masahiro Watanabe, Hitoshi Wakabayashi, Kazuo Tsutsui, Hiroshi Iwai, Atsushi Ogura, Wataru Saito, Shin-Ichi Nishizawa, Masanori Tsukuda, Ichiro Omura, Hiromichi Ohashi, Toshiro Hiramoto

    IEEE Transactions on Semiconductor Manufacturing   33 ( 2 )   159 - 165   2020.5

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    Publishing type:Research paper (scientific journal)   Publisher:Institute of Electrical and Electronics Engineers (IEEE)  

    DOI: 10.1109/tsm.2020.2972369

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  • NiSi2 as a Bottom Electrode for Enhanced Endurance of Ferroelectric Y-doped HfO2 Thin Films

    Joel Molina-Reyes, Takuya Hoshii, Shun-Ichiro Ohmi, Hiroshi Funakubo, Atsushi Hori, Ichiro Fujiwara, Hitoshi Wakabayashi, Kazuo Tsutsui, Kuniyuki Kakushima

    Jpn. J. Appl. Phys.   Vol. 59   2020.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Physics Publishing  

    DOI: 10.35848/1347-4065/ab6b7c

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  • Strong edge-induced ferromagnetism in sputtered MoS2 film treated by post-annealing

    Takanori Shirokura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    APPLIED PHYSICS LETTERS   115 ( 19 )   2019.11

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    DOI: 10.1063/1.5118913

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  • Switching of 3300v scaled igbt by 5v gate drive

    T. Hiramoto, K. Satoh, T. Matsudai, W. Saito, K. Kakushima, T. Hoshii, K. Furukawa, M. Watanabe, N. Shigyo, H. Wakabayashi, K. Tsutsui, T. Sarava, H. Iwai, A. Ogura, S. Nishizawa, I. Omura, H. Ohash, K. Itou, T. Takakura, M. Fukui, S. Suzuki, K. Takeuchi, M. Tsukuda, Y. Numasawa

    Proceedings of International Conference on ASIC   2019.10

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE Computer Society  

    DOI: 10.1109/ASICON47005.2019.8983633

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  • Sheet-Resistance Reduction of Sputtered-MoS2 Film by SF6 Plasma Treatment

    Horiguchi Taiga, Hamada Takuya, Tatsumi Tetsuya, Tomiya Shigetaka, Hoshii Takuya, Kakushima Kuniyuki, Tsutsui Kazuo, Wakabayashi Hitoshi

    JSAP Annual Meetings Extended Abstracts   2019.2   3887 - 3887   2019.9

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    Language:Japanese   Publisher:The Japan Society of Applied Physics  

    DOI: 10.11470/jsapmeeting.2019.2.0_3887

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  • Sheet resistance reduction of Sputtered MoS2 Film by Cl2 Plasma Treatment

    Hamada Takuya, Horiguchi Taiga, Tatsumi Tetsuya, Tomiya Shigetaka, Hamada Masaya, Hoshii Takuya, Kakushima Kuniyuki, Tsutsui Kazuo, Wakabayashi Hitoshi

    JSAP Annual Meetings Extended Abstracts   2019.2   3888 - 3888   2019.9

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    Language:Japanese   Publisher:The Japan Society of Applied Physics  

    DOI: 10.11470/jsapmeeting.2019.2.0_3888

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  • Analysis of back-gate effect on threshold voltage of p-channel GaN MOSFETs on polarization-junction substrates

    Takuya Hoshii, Akira Nakajima, Shin-ichi Nishizawa, Hiromichi Ohashi, Kuniyuki Kakushima, Hitoshi Wakabayashi, Kazuo Tsutsui

    JAPANESE JOURNAL OF APPLIED PHYSICS   58 ( 6 )   2019.6

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    DOI: 10.7567/1347-4065/ab1c78

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  • Normally-off sputtered-MoS<inf>2</inf> nMISFETs with MoSi<inf>2</inf> contact by sulfur powder annealing and ALD Al<inf>2</inf>O<inf>3</inf> gate dielectric for chip level integration Reviewed

    K. Matsuura, M. Hamada, T. Hamada, H. Tanigawa, T. Sakamoto, W. Cao, K. Parto, A. Hori, I. Muneta, T. Kawanago, K. Kakushima, K. Tsutsui, A. Ogura, K. Banerjee, H. Wakabayashi

    19th International Workshop on Junction Technology, IWJT 2019   2019.6

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Institute of Electrical and Electronics Engineers Inc.  

    DOI: 10.23919/IWJT.2019.8802622

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  • Mechanism for high hall-effect mobility in sputtered-MoS2 film controlling particle energy

    Takuro Sakamoto, Takumi Ohashi, Kentaro Matsuura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Yuuta Suzuki, Nobuyuki Ikarashi, Hitoshi Wakabayashi

    2018 IEEE SOI-3D-Subthreshold Microelectronics Technology Unified Conference, S3S 2018   2019.2

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    DOI: 10.1109/S3S.2018.8640168

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  • Low-Temperature MoS2 Film Formation Using Sputtering and H2S Annealing

    Jun'ichi Shimizu, Takumi Ohashi, Kentaro Matsuura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Nobuyuki Ikarashi, Hitoshi Wakabayashi

    IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY   7 ( 1 )   2 - 6   2019

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/JEDS.2018.2854633

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  • High Hall-Effect Mobility of Large-Area Atomic-Layered Polycrystalline ZrS2 Film Using UHV RF Magnetron Sputtering and Sulfurization

    Masaya Hamada, Kentaro Matsuura, Takuro Sakamoto, Iriya Muneta, Takuya Hoshii, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY   7 ( 1 )   1258 - 1263   2019

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/JEDS.2019.2943609

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  • New Methodology for Evaluating Minority Carrier Lifetime for Process Assessment

    K. Kakushima, T. Hoshii, M. Watanabe, N. Shizyo, K. Furukawa, T. Saraya, T. Takakura, K. Itou, M. Fukui, S. Suzuki, K. Takeuchi, I. Muneta, H. Wakabayashi, Y. Numasawa, A. Ogura, S. Nishizawa, K. Tsutsui, T. Hiramoto, H. Ohashi, H. Iwai

    IEEE Symposium on VLSI Circuits, Digest of Technical Papers   2018-June   105 - 106   2018.10

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Institute of Electrical and Electronics Engineers Inc.  

    DOI: 10.1109/VLSIC.2018.8502399

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  • Verification of the injection enhancement effect in IGBTs by measuring the electron and hole currents separately Reviewed

    T. Hoshii, K. Furukawa, K. Kakushima, M. Watanabe, N. Shigvo, T. Saraya, T. Takakura, K. Ltou, M. Fukui, S. Suzuki, K. Takeuchi, I. Muneta, H. Wakabayashi, Shinichi Nishizawa, K. Tsutsui, T. Hiramoto, H. Ohashi, H. Lwai

    48th European Solid-State Device Research Conference, ESSDERC 2018 2018 48th European Solid-State Device Research Conference, ESSDERC 2018   2018-   26 - 29   2018.10

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Editions Frontieres  

    DOI: 10.1109/ESSDERC.2018.8486870

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  • Chip-Level-Integrated nMISFETs with Sputter-Deposited-MoS<inf>2</inf> Thin Channel Passivated by Al<inf>2</inf>O<inf>3</inf> Film and TiN Top Gate

    Kentaro Matsuura, Jun'Ichi Shimizu, Mayato Toyama, Takumi Ohashi, Iriya Muneta, Seiya Ishihara, Kuniyuki Kakushima, Kazuo Tsutsui, Atsushi Ogura, Hitoshi Wakabayashi

    2018 IEEE Electron Devices Technology and Manufacturing Conference, EDTM 2018 - Proceedings   104 - 106   2018.7

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    DOI: 10.1109/EDTM.2018.8421491

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  • Low-Carrier-Density Sputtered MoS2 Film by Vapor-Phase Sulfurization Reviewed

    Kentaro Matsuura, Takumi Ohashi, Iriya Muneta, Seiya Ishihara, Kuniyuki Kakushima, Kazuo Tsutsui, Atsushi Ogura, Hitoshi Wakabayashi

    Journal of Electronic Materials   47 ( 7 )   3497 - 3501   2018.7

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    DOI: 10.1007/s11664-018-6191-z

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  • Ohmic contact between titanium and sputtered MoS2 films achieved by forming-gas annealing

    Mayato Toyama, Takumi Ohashi, Kentaro Matsuura, Jun'ichi Shimizu, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   57 ( 7 )   2018.7

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    DOI: 10.7567/JJAP.57.07MA04

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  • Active-performance benchmark for advanced 3D-CMOS devices Reviewed

    Hitoshi Wakabayashi, Eisuke Anju, Iriya Muneta

    China Semiconductor Technology International Conference 2018, CSTIC 2018   1 - 4   2018.5

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Institute of Electrical and Electronics Engineers Inc.  

    DOI: 10.1109/CSTIC.2018.8369202

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  • Photovoltaic properties of lateral ultra-thin Si p-i-n structure Reviewed

    Suguru Tatsunokuchi, I. Muneta, T. Hoshii, H. Wakabayashi, K. Tsutsui, H. Iwai, K. Kakushima

    China Semiconductor Technology International Conference 2018, CSTIC 2018   1 - 3   2018.5

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    DOI: 10.1109/CSTIC.2018.8369314

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  • Improvement of SiO2/4H-SiC Interface properties by post-metallization annealing Reviewed

    Y. M. Lei, H. Wakabayashi, K. Tsutsui, H. Iwai, M. Furuhashi, S. Tomohisa, S. Yamakawa, K. Kakushima

    Microelectronics Reliability   84   226 - 229   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier Ltd  

    DOI: 10.1016/j.microrel.2018.03.036

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  • Effect of lanthanum silicate interface layer on the electrical characteristics of 4H-SiC metal-oxide-semiconductor capacitors Reviewed

    Y. M. Lei, H. Wakabayashi, K. Tsutsui, H. Iwai, M. Furuhashi, S. Tomohisa, S. Yamakawa, K. Kakushima

    Microelectronics Reliability   84   248 - 252   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier Ltd  

    DOI: 10.1016/j.microrel.2018.03.037

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  • GaN-based complementary metal-oxide- semiconductor inverter with normally off Pch and Nch MOSFETs fabricated using polarisation-induced holes and electron channels Reviewed

    Akira Nakajima, Shunsuke Kubota, Kazuo Tsutsui, Kuniyuki Kakushima, Hitoshi Wakabayashi, Hiroshi Iwai, Shin-Ichi Nishizawa, Hiromichi Ohashi

    IET Power Electronics   11 ( 4 )   689 - 694   2018.4

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    DOI: 10.1049/iet-pel.2017.0376

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  • Reduction of conductance mismatch in Fe/Al2O3/MoS2 system by tunneling-barrier thickness control Reviewed

    Naoki Hayakawa, Iriya Muneta, Takumi Ohashi, Kentaro Matsuura, Jun'ichi Shimizu, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    Japanese Journal of Applied Physics   57 ( 4 )   2018.4

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    DOI: 10.7567/JJAP.57.04FP13

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  • 3D Scaling of Si-IGBT Invited Reviewed

    H. Iwai, K. Kakushima, T. Hoshii, K. Tsutsui, A. Nakajima, S. Nishizawa, H. Wakabayashi, I. Muneta, K. Sato, T. Matsudai, W. Saito, T. Saraya, K. Itou, M. Fukui, S. Suzuki, M. Kobayashi, T. Takakura, T. Hiramoto, A. Ogura, Y. Numasawa, I. Omura, H. Ohashi

    Joint International EUROSOI Workshop and International Conference on Ultimate Integration on Silicon (EUROSOI-ULIS), Abba Granada Hotel, Granada, Spain   2018.3

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  • 3D scaling for insulated gate bipolar transistors (IGBTs) with low Vce(sat) Reviewed

    K. Tsutsui, K. Kakushima, T. Hoshii, A. Nakajima, S. Nishizawa, H. Wakabayashi, I. Muneta, K. Sato, T. Matsudai, W. Saito, T. Saraya, K. Itou, M. Fukui, S. Suzuki, M. Kobayashi, T. Takakura, T. Hiramoto, A. Ogura, Y. Numasawa, I. Omura, H. Ohashi, H. Iwai

    Proceedings of International Conference on ASIC   2017-   1137 - 1140   2018.1

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE Computer Society  

    DOI: 10.1109/ASICON.2017.8252681

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  • Sputter-deposited-MoS <inf>2</inf> n MISFETs with top-gate and Al <inf>2</inf> O <inf>3</inf> passivation under low thermal budget for large area integration

    Kentaro Matsuura, Jun'Ichi Shimizu, Mayato Toyama, Takumi Ohashi, Iriya Muneta, Seiya Ishihara, Kuniyuki Kakushima, Kazuo Tsutsui, Atsushi Ogura, Hitoshi Wakabayashi

    IEEE Journal of the Electron Devices Society   6 ( 1 )   1251 - 1257   2018.1

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    DOI: 10.1109/JEDS.2018.2883133

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  • Low-Dimensional-Structure Devices for Future Electronics

    Shunri Oda, Takamasa Kawanago, Hitoshi Wakabayashi

    CAS 2018 PROCEEDINGS: 2018 INTERNATIONAL SEMICONDUCTOR CONFERENCE   3 - 6   2018

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  • Investigation of Novel Te precursor (i-C3H7)2Te for MoTe2 Fabrication

    Y. Hibino, S. Ishihara, N. Sawamoto, T. Ohashi, K. Matsuura, H. Machida, M. Ishikawa, H. Sudo, H. Wakabayashi, A. Ogura

    MRS Advances   3 ( 6-7 )   321 - 326   2018

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    DOI: 10.1557/adv.2018.126

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  • Guest Editorial Special Section on the First Electron Devices Technology and Manufacturing (EDTM) Conference 2017 Reviewed

    Hitoshi Wakabayashi

    IEEE Journal of the Electron Devices Society   6 ( 1 )   480   2018

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    DOI: 10.1109/JEDS.2018.2817319

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  • MOCVD of Monolayer MoS2 using Novel Molybdenum Precursor i-Pr2DADMo(CO)3

    S. Ishihara, Y. Hibino, N. Sawamoto, H. Machida, H. Wakabayashi, A. Ogura

    MRS Advances   3 ( 6-7 )   379 - 384   2018

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    DOI: 10.1557/adv.2018.237

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  • Relaxation of Self-Heating-Effect for Stacked-Nanowire FET and p/n-Stacked 6T-SRAM Layout

    Eisuke Anju, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY   6 ( 1 )   1239 - 1245   2018

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    DOI: 10.1109/JEDS.2018.2882406

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  • Mechanism for High Hall-Effect Mobility in Sputtered-MoS2 Film Controlling Particle Energy

    Takuro Sakamoto, Takumi Ohashi, Kentaro Matsuura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Yuuta Suzuki, Nobuyuki Ikarashi, Hitoshi Wakabayashi

    2018 IEEE SOI-3D-SUBTHRESHOLD MICROELECTRONICS TECHNOLOGY UNIFIED CONFERENCE (S3S)   2018

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  • Hall-Effect Mobility Enhancement of Sputtered MoS2 Film by Vapor Phase Sulfurization through Al2O3 Passivation Film

    Masaya Hamada, Kentaro Matsuura, Takuro Sakamoto, Haruki Tanigawa, Takumi Ohashi, Iriya Muneta, Takuya Hoshii, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    2018 IEEE SOI-3D-SUBTHRESHOLD MICROELECTRONICS TECHNOLOGY UNIFIED CONFERENCE (S3S)   2018

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  • Individual Atomic Imaging of Multiple Dopant Sites in As-Doped Si Using Spectro-Photoelectron Holography Reviewed

    Tsutsui, K., Matsushita, T., Natori, K., Muro, T., Morikawa, Y., Hoshii, T., Kakushima, K., Wakabayashi, H., Hayashi, K., Matsui, F., Kinoshita, T.

    Nano Letters   17 ( 12 )   2017.12

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    DOI: 10.1021/acs.nanolett.7b03467

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  • Individual Atomic Imaging of Multiple Dopant Sites in As-Doped Si Using Spectro-Photoelectron Holography Reviewed

    Kazuo Tsutsui, Tomohiro Matsushita, Kotaro Natori, Takayuki Muro, Yoshitada Morikawa, Takuya Hoshii, Kuniyuki Kakushima, Hitoshi Wakabayashi, Kouichi Hayashi, Fumihiko Matsui, Toyohiko Kinoshita

    NANO LETTERS   17 ( 12 )   7533 - 7538   2017.12

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    DOI: 10.1021/acs.nanolett.7b03467

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  • Band gap-tuned MoS2(1-x)Te2x thin films synthesized by a hybrid Co-sputtering and post-deposition tellurization annealing process Reviewed

    Yusuke Hibino, Seiya Ishihara, Naomi Sawamoto, Takumi Ohashi, Kentarou Matsuura, Hideaki Machida, Hitoshi Wakabayashi, Atsushi Ogura

    JOURNAL OF MATERIALS RESEARCH   32 ( 16 )   3021 - 3028   2017.8

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    DOI: 10.1557/jmr.2017.306

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  • Low temperature ohmic contact for p-type GaN using Mg electrodes Reviewed

    K. Kakushima, Y. Ikeuchi, T. Hoshii, I. Muneta, H. Wakabayashi, K. Tsutsui, H. Iwai, T. Kikuchi, S. Ishikawa

    17th International Workshop on Junction Technology, IWJT 2017   85 - 86   2017.6

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    DOI: 10.23919/IWJT.2017.7966523

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  • Resistivity reduction of low-carrier-density sputtered-MoS2 film using fluorine gas Reviewed

    Yasunori Okada, Shimpei Yamaguchi, Takumi Ohashi, Iriya Muneta, Kuniyuki Kasushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    17th International Workshop on Junction Technology, IWJT 2017   44 - 46   2017.6

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    DOI: 10.23919/IWJT.2017.7966510

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  • Infrared spectroscopic analysis of reactively formed La-silicate interface layer at La2O3/Si substrates Reviewed

    K. Kakushima, T. Seki, H. Wakabayashi, K. Tsutsui, H. Iwai

    VACUUM   140   14 - 18   2017.6

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    DOI: 10.1016/j.vacuum.2016.11.017

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  • Quantitative relationship between sputter-deposited-MoS2 properties and underlying-SiO2 surface roughness Reviewed

    Takumi Ohashi, Iriya Muneta, Kentaro Matsuura, Seiya Ishihara, Yusuke Hibino, Naomi Sawamoto, Kuniyuki Kakushima, Kazuo Tsutsui, Atsushi Ogura, Hitoshi Wakabayashi

    Applied Physics Express   10 ( 4 )   2017.4

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    DOI: 10.7567/APEX.10.041202

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  • High-mobility and low-carrier-density sputtered MoS2 film formed by introducing residual sulfur during low-temperature in 3%-H-2 annealing for three-dimensional ICs Reviewed

    Jun'ichi Shimizu, Takumi Ohashi, Kentaro Matsuura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   56 ( 4 )   2017.4

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    DOI: 10.7567/JJAP.56.04CP06

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  • High-mobility and low-carrier-density sputtered MoS

    Shimizu Jun’ichi, Ohashi Takumi, Matsuura Kentaro, Muneta Iriya, Kakushima Kuniyuki, Tsutsui Kazuo, Wakabayashi Hitoshi

    Jpn. J. Appl. Phys.   56 ( 4 )   04CP06   2017.3

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    We investigate the low-temperature formation of MoS<inf>2</inf>films by radio frequency (RF) sputtering. This work is focused on reducing the number of sulfur defects and the improving electrical characteristics of sputtered MoS<inf>2</inf>films by low-temperature annealing in various atmospheres. 10 nm MoS<inf>2</inf>films were synthesized by the RF sputtering at 300 °C and followed by annealing in nitrogen or forming gas (FG: 3% hydrogen in N<inf>2</inf>) at 200–400 °C. As a result, the compensation for sulfur defects in FG anneal process using residual sulfur gave better results that in N<inf>2</inf>annealing. Eventually, a high Hall-effect mobility of 36 cm2V−1s−1and a low carrier density of 1014cm−3were achieved.

    DOI: 10.7567/JJAP.56.04CP06

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  • Effects of Reaction Conditions on MoS2 Thin Film Formation Synthesized by Chemical Vapor Deposition using Organic Precursor

    S. Ishihara, Y. Hibino, N. Sawamoto, T. Ohashi, K. Matsuura, H. Machida, M. Ishikawa, H. Sudo, H. Wakabayashi, A. Ogura

    MRS Advances   2 ( 29 )   1533 - 1538   2017

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    DOI: 10.1557/adv.2016.666

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  • Low-carrier density sputtered-MoS2 film by H2S annealing for normally-off accumulation-mode FET Reviewed

    Jun'ichi Shimizu, Takumi Ohashi, Kentaro Matsuura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Nobuyuki Ikarashi, Hitoshi Wakabayashi

    2017 IEEE ELECTRON DEVICES TECHNOLOGY AND MANUFACTURING CONFERENCE (EDTM)   222 - 223   2017

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    DOI: 10.1109/EDTM.2017.7947572

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  • Crystallinity Improvement using Migration-Enhancement Methods for Sputtered-MoS2 Films Reviewed

    Shin Hirano, Jun'ichi Shimizu, Kentaro Matsuura, Takumi Ohashi, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi

    2017 IEEE ELECTRON DEVICES TECHNOLOGY AND MANUFACTURING CONFERENCE (EDTM)   234 - 235   2017

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    DOI: 10.1109/EDTM.2017.7947578

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  • Investigation on MoS2(1-x)Te2x Mixture Alloy Fabricated by Co-sputtering Deposition

    Y. Hibino, S. Ishihara, N. Sawamoto, T. Ohashi, K. Matsuura, H. Machida, M. Ishikawa, H. Sudo, H. Wakabayashi, A. Ogura

    MRS Advances   2 ( 29 )   1557 - 1562   2017

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    DOI: 10.1557/adv.2017.125

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  • Poly-Si gate electrodes for AlGaN/GaN HEMT with high reliability and low gate leakage current Reviewed

    J. Chen, H. Wakabayashi, K. Tsutsui, H. Iwai, K. Kakushima

    MICROELECTRONICS RELIABILITY   63   52 - 55   2016.8

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    DOI: 10.1016/j.microrel.2016.05.014

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  • Resistive switching properties of a thin SiO2 layer with CeOx buffer layer on n(+) and p(+) Si bottom electrodes Reviewed

    M. S. Hadi, N. Sugii, H. Wakabayashi, K. Tsutsui, H. Iwai, K. Kakushima

    MICROELECTRONICS RELIABILITY   63   42 - 45   2016.8

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    DOI: 10.1016/j.microrel.2016.06.013

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  • Photovoltaic Characteristics of Ultra-Thin Single Crystalline Silicon Solar Cells Reviewed

    R. Miyazawa, H. Wakabayashi, K. Tsutsui, H. Iwai, K. Kakushima

    International Journal of High Speed Electronics and Systems   25 ( 1-2 )   2016.6

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    DOI: 10.1142/S0129156416400085

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  • Properties of single-layer MoS2 film fabricated by combination of sputtering deposition and post deposition sulfurization annealing using (t-C4H9)(2)S-2 Reviewed

    Seiya Ishihara, Yusuke Hibino, Naomi Sawamoto, Kohei Suda, Takumi Ohashi, Kentarou Matsuura, Hideaki Machida, Masato Ishikawa, Hiroshi Sudoh, Hitoshi Wakabayashi, Atsushi Ogura

    JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 6 )   2016.6

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  • Laminated Mo/C Electrodes for 4H-SiC Schottky Barrier Diodes With Ideal Interface Characteristics Reviewed

    Tomoyuki Suzuki, Hitoshi Wakabayashi, Kazuo Tsutsui, Hiroshi Iwai, Kuniyuki Kakushima

    IEEE ELECTRON DEVICE LETTERS   37 ( 5 )   618 - 620   2016.5

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    DOI: 10.1109/LED.2016.2536738

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  • La2O3 gate dielectrics for AlGaN/GaN HEMT Reviewed

    J. Chen, T. Kawanago, H. Wakabayashi, K. Tsutsui, H. Iwai, D. Nohata, H. Nohira, K. Kakushima

    MICROELECTRONICS RELIABILITY   60   16 - 19   2016.5

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    DOI: 10.1016/j.microrel.2016.02.004

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  • Dependence of ohmic contact properties on AlGaN layer thickness for AlGaN/GaN high-electron-mobility transistors Reviewed

    Yusuke Takei, Kazuo Tsutsui, Wataru Saito, Kuniyuki Kakushima, Hitoshi Wakabayashi, Hiroshi Iwai

    JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 4 )   2016.4

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    DOI: 10.7567/JJAP.55.040306

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  • Improving crystalline quality of sputtering-deposited MoS2 thin film by postdeposition sulfurization annealing using (t-C4H9)(2)S-2 Reviewed

    Seiya Ishihara, Yusuke Hibino, Naomi Sawamoto, Kohei Suda, Takumi Ohashi, Kentarou Matsuura, Hideaki Machida, Masato Ishikawa, Hiroshi Sudoh, Hitoshi Wakabayashi, Atsushi Ogura

    JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 4 )   2016.4

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    DOI: 10.7567/JJAP.55.04EJ07

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  • Large Scale Uniformity of Sputtering Deposited Single- and Few-Layer MoS2 Investigated by XPS Multipoint Measurements and Histogram Analysis of Optical Contrast Reviewed

    Seiya Ishihara, Yusuke Hibino, Naomi Sawamoto, Takumi Ohashi, Kentarou Matsuura, Hideaki Machida, Masato Ishikawa, Hitoshi Wakabayashi, Atsushi Ogura

    ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY   5 ( 11 )   Q3012 - Q3015   2016

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    DOI: 10.1149/2.0031611jss

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  • Reduction of contact resistance on AlGaN/GaN HEMT structures introducing uneven AlGaN layers Reviewed

    Yusuke Takei, Masayuki Kamiya, Kazuo Tsutsui, Wataru Saito, Kuniyuki Kakushima, Hitoshi Wakabayashi, Yoshinori Kataoka, Hiroshi Iwai

    PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE   212 ( 5 )   1104 - 1109   2015.5

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    DOI: 10.1002/pssa.201431645

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  • Multi-layered MoS2 film formed by high-temperature sputtering for enhancement-mode nMOSFETs Reviewed

    Takumi Ohashi, Kohei Suda, Seiya Ishihara, Naomi Sawamoto, Shimpei Yamaguchi, Kentaro Matsuura, Kuniyuki Kakushima, Nobuyuki Sugii, Akira Nishiyama, Yoshinori Kataoka, Kenji Natori, Kazuo Tsutsui, Hiroshi Iwai, Atsushi Ogura, Hitoshi Wakabayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS   54 ( 4 )   2015.4

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  • Electron transport mechanism of tungsten trioxide powder thin film studied by investigating effect of annealing on resistivity Reviewed

    Wei Li, Akito Sasaki, Hideyuki Oozu, Katsuaki Aoki, Kuniyuki Kakushima, Yoshinori Kataoka, Akira Nishiyama, Nobuyuki Sugii, Hitoshi Wakabayashi, Kazuo Tsutsui, Kenji Natori, Hiroshi Iwai

    MICROELECTRONICS RELIABILITY   55 ( 2 )   407 - 410   2015.2

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    DOI: 10.1016/j.microrel.2014.10.012

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  • Improvement of charge/discharge performance for lithium ion batteries with tungsten trioxide electrodes Reviewed

    Wei Li, Akito Sasaki, Hideyuki Oozu, Katsuaki Aoki, Kuniyuki Kakushima, Yoshinori Kataoka, Akira Nishiyama, Nobuyuki Sugii, Hitoshi Wakabayashi, Kazuo Tsutsui, Kenji Natori, Hiroshi Iwai

    MICROELECTRONICS RELIABILITY   55 ( 2 )   402 - 406   2015.2

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    DOI: 10.1016/j.microrel.2014.11.002

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  • GaN-Based Monolithic Power Integrated Circuit Technology with Wide Operating Temperature on Polarization-Junction Platform Reviewed

    Akira Nakajima, Shin-ichi Nishizawa, Hiromichi Ohashi, Rei Kayanuma, Kazuo Tsutsui, Shunsuke Kubota, Kuniyuki Kakushima, Hitoshi Wakabayashi, Hiroshi Iwai

    2015 IEEE 27TH INTERNATIONAL SYMPOSIUM ON POWER SEMICONDUCTOR DEVICES & IC'S (ISPSD)   357 - 360   2015

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    DOI: 10.1109/ISPSD.2015.7123463

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  • Evaluation of sputtering deposited 2-diniensional M0S2 film by Raman spectroscopy

    S. Ishihara, K. Suda, Y. Hibino, N. Sawamoto, T. Ohashi, S. Yamaguchi, K. Matsuura, H. Machida, M. Ishikawa, H. Sudoh, H. Wakabayashi, A. Ogura

    Materials Research Society Symposium Proceedings   1781   11 - 16   2015

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    DOI: 10.1557/opl.2015.563

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  • An Oerview of GaN-Based Monolithic Power Integrated Circuit Technology on Polarization-Junction Platform Reviewed

    Akira Nakajima, Sin-ichi Nishizawa, Hiromichi Ohashi, Shunsuke Kubota, Rei Kayanuma, Kazuo Tsutsui, Kuniyuki Kakushima, Hitoshi Wakabayashi, Hiroshi Iwai

    2015 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)   2015

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    DOI: 10.1109/CSICS.2015.7314489

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  • INFLUENCE OF SPUTTERING GAS ON RESISTIVITY OF THIN NI SILICIDE FILMS Reviewed

    H. Imamura, K. Kakushima, Y. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, K. Natori, H. Iwai

    2015 China Semiconductor Technology International Conference   2015

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  • An Extraction Method of Charge Trapping Site Distribution in AlGaN Layer in GaN HEMT Reviewed

    T. Baba, K. Kakushima, H. Wakabayashi, K. Tsutsui, H. Iwai

    WIPDA 2015 3RD IEEE WORKSHOP ON WIDE BANDGAP POWER DEVICES AND APPLICATIONS   125 - 128   2015

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  • AN INVESTIGATION OF CeO2 BASED ReRAM WITH p(+) AND n(+)-Si BOTTOM ELECTRODES Reviewed

    J. Jin, K. Kakushima, Y. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, K. Natori, H. Iwai

    2015 China Semiconductor Technology International Conference   2015

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  • Enhanced oxidation of sic substrates using La2O3 capped annealing and a proposal for uniform LaSiON gate dielectric formation Reviewed

    Y. M. Lei, S. Munekiyo, T. Kawanago, K. Kakushima, K. Kataoka, H. Wakabayashi, K. Tsutsui, K. Natori, H. Iwai, M. Furuhashi, N. Miura

    2nd IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2014   110 - 113   2014.11

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    DOI: 10.1109/WiPDA.2014.6964635

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  • Passivation of SiO2/SiC interface with La2O3 capped oxidation Reviewed

    S. Munekiyo, Y. M. Lei, K. Natori, H. Iwai, T. Kawanago, K. Kakushima, K. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, M. Furuhashi, N. Miura, S. Yamakawa

    2nd IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2014   114 - 116   2014.11

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    DOI: 10.1109/WiPDA.2014.6964636

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  • Dependence of Ti/C ratio on Ohmic contact with tic electrode for AlGaN/GaN structure Reviewed

    M. Okamoto, K. Kakushima, Y. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, H. Iwai, W. Saito

    2nd IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2014   94 - 97   2014.11

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    DOI: 10.1109/WiPDA.2014.6964631

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  • A resistive switching device based on breakdown and anodic reoxidization of thin SiO2 on Si-based electrodes using CeOx buffer layer Reviewed

    M. S. Hadi, S. Kano, K. Kakushima, Y. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, K. Natori, H. Iwai

    SEMICONDUCTOR SCIENCE AND TECHNOLOGY   29 ( 11 )   2014.11

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    DOI: 10.1088/0268-1242/29/11/115030

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  • A novel hetero-junction Tunnel-FET using Semiconducting silicide-Silicon contact and its scalability Reviewed

    Yan Wu, Hiroyuki Hasegawa, Kuniyuki Kakushima, Kenji Ohmori, Takanobu Watanabe, Akira Nishiyama, Nobuyuki Sugii, Hitoshi Wakabayashi, Kazuo Tsutsui, Yoshinori Kataoka, Kenji Natori, Keisaku Yamada, Hiroshi Iwai

    MICROELECTRONICS RELIABILITY   54 ( 5 )   899 - 904   2014.5

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    DOI: 10.1016/j.microrel.2014.01.023

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  • Characterization of interface state density of three-dimensional Si nanostructure by charge pumping measurement Reviewed

    Chunmeng Dou, Tomoya Shoji, Kazuhiro Nakajima, Kuniyuki Kakushima, Parhat Ahmet, Yoshinori Kataoka, Akira Nishiyama, Nobuyuki Sugii, Hitoshi Wakabayashi, Kazuo Tsutsui, Kenji Natori, Hiroshi Iwai

    MICROELECTRONICS RELIABILITY   54 ( 4 )   725 - 729   2014.4

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    DOI: 10.1016/j.microrel.2013.11.016

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  • Gate Technology Contributions to Collapse of Drain Current in AlGaN/GaN Schottky HEMT Reviewed

    Takamasa Kawanago, Kuniyuki Kakushima, Yoshinori Kataoka, Akira Nishiyama, Nobuyuki Sugii, Hitoshi Wakabayashi, Kazuo Tsutsui, Kenji Natori, Hiroshi Iwai

    IEEE TRANSACTIONS ON ELECTRON DEVICES   61 ( 3 )   785 - 792   2014.3

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    DOI: 10.1109/TED.2014.2299556

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  • Atomically flat La-silicate/Si interface using tungsten carbide gate electrode with nano-sized grain Reviewed

    K. Tuokedaerhan, K. Kakushima, Y. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, K. Natori, H. Iwai

    APPLIED PHYSICS LETTERS   104 ( 2 )   2014.1

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    DOI: 10.1063/1.4861854

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  • Ohmic Contact Properties Depending on AlGaN Layer Thickness for AlGaN/GaN High Electron Mobility Transistor Structures Reviewed

    Yusuke Takei, Mari Okamoto, Wataru Saito, Kazuo Tsutsui, Kuniyuki Kakushima, Hitoshi Wakabayashi, Yoshinori Kataoka, Hiroshi Iwai

    WIDE BANDGAP SEMICONDUCTOR MATERIALS AND DEVICES 15   61 ( 4 )   265 - 270   2014

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    DOI: 10.1149/06104.0265ecst

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  • Progress and Benchmarking of CMOS-Device Technologies Reviewed

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    2014 INTERNATIONAL CONFERENCE ON ELECTRONICS PACKAGING (ICEP)   434 - 437   2014

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    DOI: 10.1109/ICEP.2014.6826721

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  • One-chip operation of GaN-based P-channel and N-channel Heterojunction Field Effect Transistors Reviewed

    Akira Nakajima, Sin-ichi Nishizawa, Hiromichi Ohashi, Hiroaki Yonezawa, Kazuo Tsutsui, Kuniyuki Kakushima, Hitoshi Wakabayashi, Hiroshi Iwai

    2014 IEEE 26TH INTERNATIONAL SYMPOSIUM ON POWER SEMICONDUCTOR DEVICES & IC'S (ISPSD)   241 - 244   2014

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    DOI: 10.1109/ISPSD.2014.6856021

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  • Advantage of TiN Schottky Gate over Conventional Ni for Improved Electrical Characteristics in AlGaN/GaN HEMT Reviewed

    T. Kawanago, K. Kakushima, Y. Kataoka, A. Nishiyama, N. Sugii, H. Wakabayashi, K. Tsutsui, K. Natori, H. Iwai

    2013 PROCEEDINGS OF THE EUROPEAN SOLID-STATE DEVICE RESEARCH CONFERENCE (ESSDERC)   107 - 110   2013

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    DOI: 10.1109/ESSDERC.2013.6818830

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  • Dual Metal/High-k Gate-Last Complementary Metal-Oxide-Semiconductor Field-Effect Transistor with SiBN Film and Characteristic Behavior In Sub-1-nm Equivalent Oxide Thickness Reviewed

    Yoshiaki Kikuchi, Hitoshi Wakabayashi, Masanori Tsukamoto, Naoki Nagashima

    JAPANESE JOURNAL OF APPLIED PHYSICS   50 ( 8 )   2011.8

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    DOI: 10.1143/JJAP.50.084201

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  • Channel strain analysis in high-performance damascene-gate p-metal-oxide-semiconductor field effect transistors using high-spatial resolution Raman spectroscopy

    Munehisa Takei, Daisuke Kosemura, Kohki Nagata, Hiroaki Akamatsu, Satoru Mayuzumi, Shinya Yamakawa, Hitoshi Wakabayashi, Atsushi Ogura

    JOURNAL OF APPLIED PHYSICS   107 ( 12 )   124507(1-6)   2010.6

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  • Mobility and Velocity Enhancement Effects of High Uniaxial Stress on Si (100) and (110) Substrates for Short-Channel pFETs Reviewed

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    IEEE TRANSACTIONS ON ELECTRON DEVICES   57 ( 6 )   1295 - 1300   2010.6

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    DOI: 10.1109/TED.2010.2045703

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  • Channel strain analysis in high-performance damascene-gate p-metal-oxide-semiconductor field effect transistors using high-spatial resolution Raman spectroscopy Reviewed

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    JOURNAL OF APPLIED PHYSICS   107 ( 12 )   2010.6

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  • Effects of Channel Width on Stress Enhancement for Damascene-Gate nFETs With Top-Cut Tensile-Stress Liner Reviewed

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    IEEE ELECTRON DEVICE LETTERS   31 ( 1 )   65 - 67   2010.1

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    DOI: 10.1109/LED.2009.2035146

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  • Planar Metal-Oxide-Semiconductor Field-Effect Transistors with Raised Source and Drain Extensions Fabricated by In situ Boron-Doped Selective Silicon Epitaxy Reviewed

    Yoshiaki Kikuchi, Yasushi Tateshita, Yuki Miyanami, Hitoshi Wakabayashi, Yukio Tagawa, Naoki Nagashima

    JAPANESE JOURNAL OF APPLIED PHYSICS   49 ( 3 )   2010

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    DOI: 10.1143/JJAP.49.036505

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  • Novel Damascene Gate Metal-Oxide-Semiconductor Field-Effect Transistors Fabricated by In situ Arsenic- and Boron-Doped Epitaxy Reviewed

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    JAPANESE JOURNAL OF APPLIED PHYSICS   49 ( 7 )   2010

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    DOI: 10.1143/JJAP.49.071301

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  • Channel-Stress Enhancement Characteristics for Scaled pMOSFETs by Using Damascene Gate With Top-Cut Compressive Stress Liner and eSiGe Reviewed

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    IEEE TRANSACTIONS ON ELECTRON DEVICES   56 ( 11 )   2778 - 2784   2009.11

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    DOI: 10.1109/TED.2009.2031002

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  • Impact of metal silicide layout covering source/drain diffusion region on minimization of parasitic resistance of triple-gate SOI MOSFET and proposal of practical design guideline Reviewed

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    SOLID-STATE ELECTRONICS   53 ( 9 )   959 - 971   2009.9

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    DOI: 10.1016/j.sse.2009.06.008

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  • High-Performance Metal/High-k n- and p-MOSFETs With Top-Cut Dual Stress Liners Using Gate-Last Damascene Process on (100) Substrates Reviewed

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    IEEE TRANSACTIONS ON ELECTRON DEVICES   56 ( 4 )   620 - 626   2009.4

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    DOI: 10.1109/TED.2009.2014192

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  • Evaluation of local strain in Si using UV-Raman spectroscopy Reviewed

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    MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS   159-60   206 - 211   2009.3

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    DOI: 10.1016/j.mseb.2008.10.059

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  • Threshold voltage modulation technique using fluorine treatment through atomic layer deposition TiN suitable for complementary metal-oxide-semiconductor devices Reviewed

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    JAPANESE JOURNAL OF APPLIED PHYSICS   47 ( 4 )   2345 - 2348   2008.4

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    DOI: 10.1143/JJAP.47.23451

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  • Tinv scaling and gate leakage reduction for n-type metal oxide semiconductor field effect transistor with HfSix/HfO2 gate stack by interfacial layer formation using ozone-water-last treatment Reviewed

    Itaru Oshiyama, Kaori Tai, Tomoyuki Hirano, Shinpei Yamaguchi, Kazuaki Tanaka, Yoshiya Hagimoto, Takayuki Uemura, Takashi Ando, Koji Watanabe, Ryo Yamamoto, Saori Kanda, Junli Wang, Yasushi Tateshita, Hitoshi Wakabayashi, Yukio Tagawa, Masanori Tsukamoto, Hayato Iwamoto, Masaki Saito, Masaharu Oshima, Satoshi Toyoda, Naoki Nagashima, Shingo Kadomura

    JAPANESE JOURNAL OF APPLIED PHYSICS   47 ( 4 )   2379 - 2382   2008.4

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    DOI: 10.1143/JJAP.47.2379

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  • Strain Technology under Metal/High-k Damascene-Gate Stacks Reviewed

    Hitoshi Wakabayashi

    SIGE, GE, AND RELATED COMPOUNDS 3: MATERIALS, PROCESSING, AND DEVICES   16 ( 10 )   101 - 115   2008

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    DOI: 10.1149/1.2986757

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  • Characteristics and modeling of sub-10-nm planar bulk CMOS devices fabricated by lateral source/drain junction control Reviewed

    Hitoshi Wakabayashi, Tatsuya Ezaki, Toshitsugu Sakamoto, Hisao Kawaura, Nobuyuki Karashi, Nobuyuki Ikezawa, Mitsuru Narihiro, Yukinori Ochiai, Takeo Ikezawa, Kiyoshi Takeuchi, Toyoji Yamamoto, Masami Hane, Tohru Mogami

    IEEE TRANSACTIONS ON ELECTRON DEVICES   53 ( 9 )   1961 - 1970   2006.9

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    DOI: 10.1109/TED.2006.880169

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  • Challenges for sub-10 nm CMOS devices Reviewed

    Tohru Mogami, Hitoshi Wakabayashi

    2006 INTERNATIONAL WORKSHOP ON NANO CMOS, PROCEEDINGS   125 - 127   2006

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    DOI: 10.1109/IWNC.2006.4570982

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  • Si-surface amorphization effects for C49-to-C54 phase transformation in TiSi2 film Reviewed

    H Wakabayashi, Y Saito, T Mogami, T Kunio

    STRESS INDUCED PHENOMENA IN METALLIZATION - FOURTH INTERNATIONAL WORKSHOP   ( 418 )   463 - 468   1998

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  • 半導体装置及び半導体装置の製造方法

    寺島 浩一, 竹内 潔, 山上 滋春, 若林 整, 小椋 厚志, 渡部 宏治, 辰巳 徹, 武田 晃一, 野村 昌弘, 田中 聖康

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    Applicant:日本電気株式会社

    Application no:JP2004015405  Date applied:2004.10

    Announcement no:WO2005-038931  Date announced:2005.4

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  • 半導体装置及び半導体装置の製造方法

    寺島 浩一, 竹内 潔, 山上 滋春, 若林 整, 小椋 厚志, 渡部 宏治, 辰巳 徹, 武田 晃一, 野村 昌弘, 田中 聖康

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    Applicant:ルネサスエレクトロニクス株式会社

    Application no:特願2005-514825  Date applied:2004.10

    Patent/Registration no:特許第4865331号  Date issued:2011.11

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  • 半導体装置及びその製造方法

    竹内 潔, 寺島 浩一, 若林 整, 山上 滋春, 小椋 厚志, 田中 聖康, 野村 昌弘, 武田 晃一, 辰巳 徹, 渡部 宏治

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    Applicant:日本電気株式会社

    Application no:JP2004014243  Date applied:2004.9

    Announcement no:WO2005-036651  Date announced:2005.4

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  • 半導体装置及びその製造方法

    竹内 潔, 寺島 浩一, 若林 整, 山上 滋春, 小椋 厚志, 田中 聖康, 野村 昌弘, 武田 晃一, 辰巳 徹, 渡部 宏治

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    Applicant:日本電気株式会社

    Application no:特願2005-514553  Date applied:2004.9

    Patent/Registration no:特許第4904815号  Date issued:2012.1

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  • フィン型電界効果トランジスタを有する半導体装置

    竹内 潔, 渡部 宏治, 寺島 浩一, 小椋 厚志, 辰巳 徹, 武田 晃一, 野村 昌弘, 田中 聖康, 山上 滋春, 若林 整

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    Applicant:日本電気株式会社

    Application no:JP2004012385  Date applied:2004.8

    Announcement no:WO2005-022637  Date announced:2005.3

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  • 半導体装置及びその製造方法

    山上 滋春, 若林 整, 竹内 潔, 武田 晃一, 小椋 厚志, 田中 聖康, 野村 昌弘, 辰巳 徹, 渡部 宏治, 寺島 浩一

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    Applicant:日本電気株式会社

    Application no:JP2004012092  Date applied:2004.8

    Announcement no:WO2005-020325  Date announced:2005.3

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  • 空洞を有するシリコン基板上の高移動度MISFET半導体装置及びその製造方法

    若林 整, 小椋 厚志

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    Applicant:日本電気株式会社

    Application no:JP2004011988  Date applied:2004.8

    Announcement no:WO2005-020314  Date announced:2005.3

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  • 高移動度シリコンチャネルを有する縦型MISFET半導体装置

    若林 整, 山上 滋春

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    Applicant:日本電気株式会社

    Application no:特願2005-505331  Date applied:2004.4

    Patent/Registration no:特許第4632046号  Date issued:2010.11

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  • 高移動度シリコンチャネルを有する縦型MISFET半導体装置

    若林 整, 山上 滋春

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    Applicant:日本電気株式会社

    Application no:JP2004005145  Date applied:2004.4

    Announcement no:WO2004-090992  Date announced:2004.10

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  • 半導体装置及びその製造方法

    黄 俐昭, 山上 滋春, 李 ジョンウー, 若林 整, 斎藤 幸重, 小椋 厚志, 成廣 充, 新井 浩一, 武村 久, 最上 徹, 山本 豊二, 落合 幸徳

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    Applicant:日本電気株式会社

    Application no:特願2002-355416  Date applied:2002.12

    Announcement no:特開2004-193146  Date announced:2004.7

    Patent/Registration no:特許第4154578号  Date issued:2008.7

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  • 半導体装置及びその製造方法

    黄 俐昭, 山上 滋春, 李 ジョンウー, 若林 整, 斎藤 幸重, 小椋 厚志, 成廣 充, 新井 浩一, 武村 久, 最上 徹, 山本 豊二, 落合 幸徳

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    Applicant:日本電気株式会社

    Application no:特願2002-355416  Date applied:2002.12

    Announcement no:特開2004-193146  Date announced:2004.7

    Patent/Registration no:特許第4154578号  Date issued:2008.7

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  • せり上げ素子分離構造を有する半導体装置及びその製造方法

    若林 整, 李 ジョンウー, 黄 俐昭, 山上 滋春, 斎藤 幸重

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    Applicant:日本電気株式会社

    Application no:特願2002-332240  Date applied:2002.11

    Announcement no:特開2004-165566  Date announced:2004.6

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  • 電界効果型トランジスタの製造方法

    黄 俐昭, 若林 整, 山上 滋春, 李 ジョンウー

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    Applicant:日本電気株式会社

    Application no:特願2002-166799  Date applied:2002.6

    Announcement no:特開2004-014835  Date announced:2004.1

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  • 半導体装置およびその製造方法

    若林 整, 齋藤 幸重

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    Applicant:日本電気株式会社

    Application no:特願2000-013428  Date applied:2000.1

    Announcement no:特開2001-203276  Date announced:2001.7

    Patent/Registration no:特許第3613113号  Date issued:2004.11

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  • 半導体装置およびその製造方法

    若林 整, 齋藤 幸重

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    Applicant:日本電気株式会社

    Application no:特願2000-013428  Date applied:2000.1

    Announcement no:特開2001-203276  Date announced:2001.7

    Patent/Registration no:特許第3613113号  Date issued:2004.11

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  • 半導体装置およびその製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平10-319369  Date applied:1998.11

    Announcement no:特開2000-150871  Date announced:2000.5

    Patent/Registration no:特許第3144483号  Date issued:2001.1

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  • 半導体装置およびその製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平10-319369  Date applied:1998.11

    Announcement no:特開2000-150871  Date announced:2000.5

    Patent/Registration no:特許第3144483号  Date issued:2001.1

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  • 半導体装置の配線構造およびその製造方法

    林 喜宏, 柴 和利, 若林 整

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    Applicant:日本電気株式会社

    Application no:特願平10-009634  Date applied:1998.1

    Announcement no:特開平11-214507  Date announced:1999.8

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  • 半導体装置の製造方法

    若林 整, 辰巳 徹

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    Applicant:日本電気株式会社

    Application no:特願平9-305506  Date applied:1997.11

    Announcement no:特開平11-145058  Date announced:1999.5

    Patent/Registration no:特許第3104658号  Date issued:2000.9

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  • 半導体装置の製造方法

    若林 整, 辰巳 徹

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    Applicant:日本電気株式会社

    Application no:特願平9-305506  Date applied:1997.11

    Announcement no:特開平11-145058  Date announced:1999.5

    Patent/Registration no:特許第3104658号  Date issued:2000.9

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  • 半導体装置の製造方法および半導体装置

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平9-222455  Date applied:1997.8

    Announcement no:特開平11-068099  Date announced:1999.3

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  • 半導体装置の製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平9-213141  Date applied:1997.8

    Announcement no:特開平11-054752  Date announced:1999.2

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  • 半導体装置およびその製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平8-159829  Date applied:1996.6

    Announcement no:特開平10-012869  Date announced:1998.1

    Patent/Registration no:特許第2907126号  Date issued:1999.4

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  • 半導体装置およびその製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平8-159829  Date applied:1996.6

    Announcement no:特開平10-012869  Date announced:1998.1

    Patent/Registration no:特許第2907126号  Date issued:1999.4

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  • 半導体装置の製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平7-183755  Date applied:1995.7

    Announcement no:特開平9-036360  Date announced:1997.2

    Patent/Registration no:特許第2833530号  Date issued:1998.10

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  • 半導体装置の製造方法

    若林 整

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    Applicant:日本電気株式会社

    Application no:特願平7-183755  Date applied:1995.7

    Announcement no:特開平9-036360  Date announced:1997.2

    Patent/Registration no:特許第2833530号  Date issued:1998.10

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  • 半導体装置の製造方法

    堀内 忠彦, 石上 ▲隆▼司, 中村 弘幸, 最上 徹, 若林 整, 國尾 武光, 奥村 孝一郎

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    Applicant:日本電気株式会社

    Application no:特願平6-301947  Date applied:1994.12

    Announcement no:特開平8-162453  Date announced:1996.6

    Patent/Registration no:特許第2692617号  Date issued:1997.9

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  • 半導体装置の製造方法

    堀内 忠彦, 石上 ▲隆▼司, 中村 弘幸, 最上 徹, 若林 整, 國尾 武光, 奥村 孝一郎

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    Applicant:日本電気株式会社

    Application no:特願平6-301947  Date applied:1994.12

    Announcement no:特開平8-162453  Date announced:1996.6

    Patent/Registration no:特許第2692617号  Date issued:1997.9

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Research Projects

  • Growth mechanism and thermoelectric conversion property of transition metal dichalcogenides thin films

    Grant number:22K04181  2022.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

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  • 社会実装に向けた超秩序構造物質ライブラリーに基づく合成プロセス開発

    Grant number:20H05880  2020.11 - 2025.3

    日本学術振興会  科学研究費助成事業  学術変革領域研究(A)

    脇原 徹, 増野 敦信, 北村 尚斗, 小野 円佳, 伊與木 健太, 若林 整

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    Grant amount:\172510000 ( Direct Cost: \132700000 、 Indirect Cost:\39810000 )

    「超秩序構造」を理解することにより、ナノスケールで高度に構造を制御し、新規高機能性材料の創出が期待される。現在、構造・物性・機能の制御が完全に達成できていない材料群として、ゼオライト、蓄電池材料、ガラス、半導体材料に着目し、超秩序材料の設計による高機能材料の開発とその社会実装へ向けたスケールアップ検討を目的としている。
    固体と液体が存在する系で合成されるゼオライトにおいて、多くは固液を分離したうえで固体成分の構造変化等をex situ条件で分析してきた。合成条件下での結晶化の挙動をin situ測定することにより、ex situ測定だけでは得られなかった情報を得ることができると考えられる。触媒などとして用いられるCHA型ゼオライトを対象とし、in situ HEXTS測定を行った。合成装置の改良によってゼオライトのin situ測定の適用範囲を広げ、実際に初めて合成途中にリング構造が変化する様の観察に成功した。特にアルミノシリケート非晶質の重縮合に伴う4員環の増加がCHAゼオライトの核発生前に進行していることを明らかにした。リチウムイオン電池の負極材料として、超高速充放電が可能なTi-Nb-O系材料に着目し、TiNb2O7にInを置換した試料とTi:Nb比が異なる試料を合成して充放電試験を行った。その結果、In置換により放電容量が増加することが明らかになった。希土類シリケート二元系ガラスの合成に成功し、機械特性評価や構造解析を行った。また、リン酸塩ガラスに微量添加したクロムが、化学的耐久性を劇的に向上させること、またそれが強い組成依存性を示すことを見出した。HIPを用いて1800℃、高圧下処理した高純度シリカガラスを得た。これらのガラスのレイリー散乱光係数を測定したところ、0.2 GPaの結果は既報データと整合性が良く、圧力が高いほど散乱が小さくなった。

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  • Self-Heating-Effect-Free p/n-Stacked-NW/Bulk-FinFETs and 6T-SRAM

    Grant number:18K04258  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Hitoshi Wakabayashi

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    For MOSFET technology for ultra-low power consumption LSI, miniaturization by nano-wire (NW) structure is effective. However, the decrease in drive current due to self-heating effect is a problem, and it is effective to realize a heat dissipation path (recess contact) leading to the substrate by stacked NW on FinFETs. Therefore, we clarified the self-heating effect suppression and area reduction effect for Inverter, Transfer gate, NOR, NAND, multi-input NOR / NAND, and SRAM by p/n-stacked NW/FinFETs. Next, although the self-heating effect is more serious in NOR than in NAND, but it was clarified that the drive current is able to be maintained up to 5 inputs.

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  • Challenge to fabricate 3D structure of atomically thin TMDC film for future 2D-MISFET

    Grant number:16K14247  2016.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Wakabayashi Hitoshi

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    Grant amount:\3640000 ( Direct Cost: \2800000 、 Indirect Cost:\840000 )

    Regarding a two-dimensional channel field effect transistor (2D-MISFET) using a transition metal dichalcogenide (TMDC) as an atomic layered semiconductor, the molybdenum disulfide (MoS2) film formed by the ultra-high vacuum RF magnetron sputtering method has been investigated. Three dimensional fin shape was observed in cross sectional TEM, but lacked controllability. On the other hand, the MoS2 fin shape was confirmed due to the surface roughness of the underlying substrate as a trigger. It was confirmed by Raman spectroscopy that its internal stress was small and its crystallinity was high. As described above, we found that grain boundary control of TMDC film is more effective than nucleation from patterned structure to realize three-dimensional MoS2 film.

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  • Control of 3D atomic structures of impurities doped in semiconductors and its application to low-loss high efficient devices

    Grant number:26105014  2014.7 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Tsutsui Kazuo, Sato Shintaro, Mori Daisuke, Hoshii Takuya, Iwai Hiroshi, Kawamura Tomoaki

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    Grant amount:\83720000 ( Direct Cost: \64400000 、 Indirect Cost:\19320000 )

    Controls of impurity doping, electronic states of interfaces and surfaces are always significant problems for development of high performance semiconductor devices. Observation of atomic scale structures of particular sites governing their electrical properties is significant. In this project, photoelectron holography was employed as a main analytical method, and it was applied to silicon (Si), wide band gap semiconductors and layered material semiconductors. 3D structures of arsenic (As) doped in Si, electrically active subsitutional As atoms and electrically inactive clustered As atoms, and additive atoms incorporated at the interface of SiC and dielectric film were successfully evaluated. Particular electronic states of MoS2 films were also revealed.
    Improvement of both sensitivity and energy resolution in the photoelectron holography technique realized analyses of impurity doped in semiconductors. New contributions to development of semiconductor technologies are expected.

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  • Basic research of high-mobility transistor with layered MoS2 channel

    Grant number:25889022  2013.8 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Research Activity Start-up

    WAKABAYASHI Hitoshi

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    Grant amount:\2730000 ( Direct Cost: \2100000 、 Indirect Cost:\630000 )

    A basic research of MoS2 film, which is an atomically-layered semiconductor instead of silicon, was carried out for high-performance and low-cost LSIs. In order to improve the mobility determining transistor performance, it was confirmed that the impurity concentration of MoS2 film is reduced as 1017 cm-3 by using a high-temperature sputtering method. Moreover, 1016 cm-3 and mobility of 26 cm2/V-s were achieved by using the flatting process for SiO2 underneath film.

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