Presentations -
-
Characterization of physical properties and UV photoresponse of amorphous GaOx thin films grown on c-plane sapphire substrates by mist CVD method
Iori YAMASAKI, Shunsuke ENOKI, Misaki NISHIKAWA, Masatoshi KOYAMA, Akihiko FUJII, Toshihiko MAEMOTO
Internal meeting Oral Presentation(general)
2025.06 -
Electron-Beam Deposition with Low Spitting Silver Source Material Improved by New Impurity Removal Processes
Y. Fujimoto, T. Kobayashi, M. Koyama, Y. Shindo
International conference The 39th International Conference on Compound Semiconductor Manufacturing Technology (CS MANTECH) ( New Orleans, U.S.A. ) Poster (general)
2025.05 -
Heat Resistance Improvement of Palladium Pre Plated Frames of Semiconductor Packaging with a New Additive for Nickel Plating
S. Sekiguchi, S. Mizuhashi, Y. Sato, M. Koyama, Y. Shindo
International conference The 39th International Conference on Compound Semiconductor Manufacturing Technology (CS MANTECH) ( New Orleans, U.S.A ) Oral Presentation(general)
2025.05 -
Achieving High Current Density in AlOx/ZnO Multilayer TFTs for Flexible OLED Applications through Low-Temperature Post Annealing
Kensuke Nakata, Kaiko Yuge, Akira Fujimoto, Hideo Wada, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference The 2024 International Meeting for Future of Electron Devices, Kansai ( Ryukoku Univ. Fukakusa Campus (Jojukan), Kyoto, Japan ) Poster (general)
2024.11 -
Thickness Controle in CH3NH3PbI3 Thin Film Fabrication by Bar-Coating Method for Solar Cell Application
Masaki Horie, Masatoshi Koyama, Toshihiko Maemoto, Akihiko Fujii
International conference The 16th Asian Conference on Organic Electronics(A-COE 2024) ( I-site Namba, Osaka, Japan ) Poster (general)
2024.11 -
Effect of Post-annealing on Structural and Optical Properties of Mist-CVD Grown Amorphous Ga2O3 Thin Films
Manami Miyazaki, Iori Yamasaki, Yuma Tanaka, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference The 11th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2024) ( Busan, Korea ) Poster (general)
2024.10 -
Low Temperature Growth of Amorphous Ga2O3 on C-plane Sapphire Substrates by Mist Chemical Vapor Deposition
Iori Yamasaki, Manami Miyazaki, Yuma Tanaka, Masatoshi Koyama, Akihiko Fujii, and Toshihiko Maemoto
International conference The 11th Asia-Pacific Workshop on Widegap Semiconductors (APWS 2024) ( Busan, Korea ) Poster (general)
2024.10 -
UV Detection Properties of Mist CVD Grown Amorphous Ga2O3 Thin Films
Internal meeting Oral Presentation(general)
2024.08 -
Weak Localization and Gas Sensing of Graphene
Akira Fujimoto, Shoji Maeda, DaijuTerasawa, Akira Fukuda, Masatoshi Koyama, Kazuto Koike, Yoshiyuki Harada, ZhigangJiang, Eric M. Vogel
International conference 36th International Conference on the Physics of Semiconductors ( Ottawa, Canada ) Poster (general)
2024.07-2024.08 -
Electron-beam Deposition with Low Spitting Platinum Source Material Improved by New Impurity Removal Processes
Atsushi Kawashimo, Takahiro Kobayashi, Masatoshi Koyama, and Yuichiro Shindo
International conference International Conference on Compound Semiconductor manufacturing Technology ( Tuson, Arizona, U.S.A. ) Oral Presentation(general)
2024.05 -
Low-temperature fabrication process of In2O3 thin-film transistors using aqueous precursor solution and excimer light
Takeaki Komai, Ryosuke Kasahara, Hideo Wada, Masatoshi Koyama, Akihiko Fujii, Toshihiko Maemoto, Akihiro Shimizu, Noritaka Takezoe and Hiroyasu Ito
International conference International Meeting for Future Electron Devices, Kansai (IMFEDK) ( Avanti Kyoto Hall, Kyoto, Japan) ) Poster (general)
2023.11 -
Fabrication and characterization of low barrier height InAs/GaxIn1-xAs/InAs heterostructure diodes toward millimeter-wave detection
Moto Inoue, Masatoshi Koyama, Toshihiko Maemoto, and Shigehiko Sasa
International conference 48th CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES ( Montreal, Canada ) Poster (general)
2023.09 -
Study for enhanced THz radiation using InGaSb/InAs heterostructures
Yoshiyuki Takagi, Takayuki Hasegawa, Masatoshi Koyama, Toshihiko Maemoto, and Shigehiko Sasa
International conference 14th Topical Workshop on Heterostructure Microelectronics ( Hiroshima ) Poster (general)
2022.08-2022.09 -
Can longitudinal optical phonons obtain longer decay time by introducing defects with the use of surface treatments? A terahertz time-domain spectroscopic study on GaAs epilayers
HideoTakeuchi, Yuto Omuku, Ryota Onoda, Toshihiro Nakaoka, Jun Utsumi, Shigeo Kawasaki , Masatoshi Koyama
International conference International Conference on the Physics of Semiconductors 2022 ( Sydney, Australia ) Poster (general)
2022.06 -
HZOバッファ層を用いたMOD法によるR 面サファイア基板上への VO2 薄膜の作製
豊田和晃, 扶川 泰斗, 大内 涼介, 小池 一歩, 小山 政俊, 和田英男, 河原正美
Internal meeting 第30回（2021年度）日本赤外線学会研究発表会 ( オンライン ) Poster (general)
2021.10 -
Terahertz time-domain spectroscopy of GaAs epitaxial layers treated with the use of fast atom bombardment
Hideo Takeuchi, Yuto Omuku, Ryota Onoda, Toshihiro Nakaoka, Jun Utsumi, Shigeo Kawasaki, and Masatoshi Koyama
International conference 31st International Conference on Defects in Semiconductors (ICSD31) 2021 ( Oslo ) Poster (general)
2021.07 -
Structural Analysis and Characterization of Bilayer AZO Thin Film Transistor by SolutionProcess
Kazuyori Oura, Keisuke Takano, Hideo Wada, Masatoshi Koyama, Toshihiko Maemoto and Shigehiko Sasa
International conference 33rd International Microprocesses and Nanotechnology Conference (MNC 2020) ( Online ) Oral Presentation(general)
2020.11 -
Development of terahertz optical sources for excitation wavelength of 1.56 μm
Daichi Shimada, Ryota Ohashi, Masatoshi Koyama, Toshihiko Maemoto, Shigehiko Sasa, Kosuke Okada, Hironaru Murakami, and Masayoshi Tonouchi
International conference 45th International Conference on Infrared Millimeter and Terahertz Waves ( Buffalo, NY, USA(Online) ) Poster (general)
2020.11 -
Impact of optical absorption for THz radiation in GaSb/InAs heterostructures
Ryota Ohashi, Daichi Shimada, Masatoshi Koyama, Toshihiko Maemoto, Shigehiko Sasa, Kosuke Okada, Hironaru Murakami, and Masayoshi Tonouchi
International conference 45th International Conference on Infrared Millimeter and Terahertz Waves ( Buffalo, NY, USA(online) ) Poster (general)
2020.11 -
R. Ohashi, D. Shimada, M. Koyama, T. Maemoto, and S. Sasa
International conference PACIFIC RIM MEETING ON ELECROCHEMICAL AND SOLID STATE SCIENCE 2020 (PRiME 2020) ( Hawaii, USA(Online) ) Poster (general)
2020.10