Papers - SAKODA Tatsuya
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Esaki Masatoshi, Takada Shinji, Tashima Daisuke, Sakoda Tatsuya, Otubo Masahisa
Record of Joint Conference of Electrical and Electronics Engineers in Kyushu 2007 ( 0 ) 461 - 461 2007
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu
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Influence of pollution of polymer insulator on Leakage Current in Field Test.
Yamashita Yohei, Haji Kenichi, Shiihara Daiki, Miyake Takuma, Sakota Tatsuya, Otsubo Masahisa
Record of Joint Conference of Electrical and Electronics Engineers in Kyushu 2007 ( 0 ) 146 - 146 2007
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu
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Examination of Discharge Genaration through Micro-Babble in Discharge Gap
Matsuda Yoshihisa, Kido Shintaro, Ikeda Koichiro, Sakota Tatsuya, Baba Seiji, Kukizaki Masato
Record of Joint Conference of Electrical and Electronics Engineers in Kyushu 2007 ( 0 ) 389 - 389 2007
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu
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kanou Akifumi, Kurozumi Masaaki, Sakota Tatsuya, Otsubo Masahisa
Record of Joint Conference of Electrical and Electronics Engineers in Kyushu 2007 ( 0 ) 249 - 249 2007
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu
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Sung Y., Yuji T., Sakoda T.
Proceedings - International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV 2 600 - 603 2006.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings - International Symposium on Discharges and Electrical Insulation in Vacuum, ISDEIV
Characteristics of radio-frequency (RF) plasma-enhanced vapor deposition (PE-CVD) for the growth of carbon nanotubes (CNTs) in a CH,/N 2 mixed gas were investigated through characterization of the prepared CNTs and a numerical simulation. The preparation of the CNTs was performed by the single chamber plasma process where the catalyst sputter deposition using a capacitively coupled plasma (CCP) and the PE-CVD using a inductively coupled plasma were carried out in the same discharge chamber. The plasma chemistry which is useful for optimizing preparation conditions was evaluated using the numerical code which could calculate the temporal evolution of particle densities in the plasma. The results showed the usefulness of the single chamber process system. It was also found that CH4, HCN and C 2 H 6 radicals mainly contributed to the growth of CNTs. © 2006 IEEE.
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Monitoring of an MgO Degradation in AC Plasma Display Panel Using Multivariate Analysis Method
Y. M. Sung, K. Ikeda, C. Honda, T. Sakoda
Japanese Journal of Applied Physics 45 ( 10 B ) 8104 - 8108 2006.10
Language：Japanese Publishing type：Research paper (scientific journal)
DOI： 10.1143/JJAP.45.8104
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Tatsuya Sakoda, Toshiyuki Hamada, Kunihiro Matsukuma, Hiroki Herai, Kazuo Matsui, Kazuo Nagasawa
Japanese Journal of Applied Physics 45 ( 5 A ) 3992 - 3993 2006.5
Language：Japanese Publishing type：Research paper (scientific journal)
DOI： 10.1143/JJAP.45.3992
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Plasma treatment on electrode surfaces of bifacial silicon solar cells
T. Sakoda, Y. M. Sung, K. Matsukuma
Solar Energy Materials & Solar Cells 90 ( 7-8 ) 1089 - 1097 2006.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Measurement of Low-Frequency Ultrasonic Wave in Water Using Acoustic Fiber Sensor
T. Sakoda, Y. Sonoda
IEEE Trans. on Ultrasonics, Ferroelectrics and Frequency Control 53 ( 4 ) 761 - 766 2006.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Optimum conditions for ozone formation in a micro dielectric barrier discharge
Y. M. Sung, T. Sakoda
Surface & Coating Technology 197 ( 2-3 ) 148 - 153 2005.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Sakoda Tatsuya, Matsukuma Kunihiro, Sung Youl-Moon, Otsubo Kouji, Tahara Minoru, Nakashima Yoshihiro
Japanese Journal of Applied Physics 44 ( 4 ) 1730 - 1731 2005
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：公益社団法人 応用物理学会
To reduce the light reflection from surfaces of single-crystalline solar cells, a new surface texturing technique using a dielectric barrier discharge was proposed and examined on wet-textured surfaces of single-crystalline Si substrates. Minute uneven structures were additionally formed on the entire area of a wet-textured surface of pyramid-like shape. When the discharge voltage was 3.5 kV, the reflectance was less than 8% at wavelengths from 400 to 1000 nm and showed a minimum of 5.3% at 520 nm.
DOI： 10.1143/JJAP.44.1730
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Activation of electrode surface on silicon solar cell using dielectric barrier discharge
Sakoda T., Matsukuma K., Araki I., Sung Y., Terakawa T., Furukawa K.
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers 43 ( 6 A ) 3275 - 3280 2004.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
To yield an activated electrode surface on a silicon solar cell, a surface treatment was examined using a dielectric barrier discharge instead of a wet cleaning technique. After the dry cleaning process using the dielectric barrier discharge, the surface state and the fill factor of the solar cell were evaluated. The results showed that the dielectric barrier discharge plasma could effectively activate the electrode surface of the solar cell in a relatively short time. Additionally, it was found that the surface treatment on finger electrodes played an essential role in the improvement of the fill factor.
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Activation of Electrode Surface on Silicon Solar Cell Using Dielectric Barrier Discharge
Sakoda Tatsuya, Matsukuma Kunihiro, Araki Ichiro, Sung Youl-Moon, Terakawa Takeshi, Furukawa Katsuhiko
Japanese Journal of Applied Physics 43 ( 6 ) 3275 - 3280 2004
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：公益社団法人 応用物理学会
To yield an activated electrode surface on a silicon solar cell, a surface treatment was examined using a dielectric barrier discharge instead of a wet cleaning technique. After the dry cleaning process using the dielectric barrier discharge, the surface state and the fill factor of the solar cell were evaluated. The results showed that the dielectric barrier discharge plasma could effectively activate the electrode surface of the solar cell in a relatively short time. Additionally, it was found that the surface treatment on finger electrodes played an essential role in the improvement of the fill factor.
DOI： 10.1143/JJAP.43.3275
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M. Otsubo, T. Hashigucchi, C. Honda, O. Takenouchi, T. Sakoda, Y. Hashimoto
IEEE on Dielectrics and Electrical Insulation 10 ( 6 ) 1053 - 1060 2003.12
Language：Japanese Publishing type：Research paper (scientific journal)
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Transmission and detection of light diffraction signal by low-frequency ultrasonic wave
Sakoda T., Sonoda Y.
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers 42 ( 9 A ) 5821 - 5825 2003.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Measurement of low-frequency ultrasonic waves in water was examined by the light diffraction effect of a visible laser beam. This laser beam was much narrower than the ultrasonic wavelength. Characteristics of detected signals agreed well with the theoretical prediction based on Fraunhofer diffraction. As shown in the results, light diffraction waves transmitted through a polarization-maintaining fiber could be detected correctly. The results enable us to construct a novel optical fiber sensor which will be used for the detection of low-frequency ultrasonic waves as well as the transmission of light diffraction signals.
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Spatial Distribution of Charged Particles in a Magnetic Neutral Loop Discharge Etcher
Y. M. Sung, T. Sakoda
Surface & Coating Technology 166 ( 2-3 ) 135 - 140 2003.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Observation of Copper Atoms Behavior in a Vacuum Arc Discharge using Laser Spectroscopy
Y. M.Sung, Y. Hayashi, Y. O. Yirenkyi, M. Otsubo, C. Honda, T. Sakoda
Journal of Vacuum Science & Technology A 21 ( 1 ) 180 - 185 2003.1
Language：Japanese Publishing type：Research paper (scientific journal)
DOI： 10.1116/1.1531141
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Studies on electron behaviors at downstream region of a neutral loop discharge plasma
T. Sakoda, Y. M. Sung
Journal of Vacuum Science & Technology A 20 ( 6 ) 1964 - 1968 2002.11
Language：Japanese Publishing type：Research paper (scientific journal)
DOI： 10.1116/1.1513644
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Two-dimensional Modeling and Optimization of a Neutral Loop Discharge Etcher in an Argon Plasma
Y. O. Yirenkyi, Y. M. Sung, M. Otsubo, C. Honda, T. Sakoda
Surface & Coating Technology 149 ( 2-3 ) 185 - 191 2002.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Sakoda T., Okraku-Yirenkyi Y., Sung Y., Otsubo M., Honda C.
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers 40 ( 11 ) 6607 - 6612 2001.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
In order to reveal the conditions required for the formation of a neutral loop discharge (NLD) plasma, distributions of excited atoms that are closely related to the distributions of the ionization rates were measured under various discharge conditions. Measurements of the distributions of these excited atoms were performed by laser induced fluorescence spectroscopy and optical emission spectroscopy. It was found that the results of these measurements were consistent with the theoretically predicted dependencies of electron heating on the magnetic field strength, the radio frequency (RF) electric field, and the frequency of the RF source. In addition, it was shown that the effects of electron-neutral collisions and of the finite size of the device set limitations on the formation of the NLD plasma.