Details of a Researcher - SAKODA Tatsuya

Characteristics of AE waves in oil immersed pole transformer

Kurose Mitsuharu, Yamamoto Takuya, Sakoda Tatsuya, Otsubo Masahisa, Yarimitsu Takayoshi, Nagasato Shinnya, Akaiwa Shigeru

Record of Joint Conference of Electrical and Electronics Engineers in Kyushu 2009 ( 0 ) 214 - 214 2009

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu

DOI： 10.11527/jceeek.2009.0.214.0

Characteristics of On-line and Off-line Partial Discharge for Hydorogenerator Stator Windings with AE Sensor and CT Sensor

I. Maeda, T. Kaneko, O. Takenouchi, T. Miyake, T. Sakoda, M. Otsubo, S. Fukumoto, A. Tokumitsu, T. Kai, M. Ando

Proceedings of 2008 International Symposium on Electrical Insulating Materials 577 - 580 2008.12

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

DOI： 10.1109/ISEIM.2008.4664533

Fundamental research on characteristics of hydrophobicity disappearance of silicone rubber surface in dynamic drop test

Shiibara D., Haji K., Sakoda T., Otsubo M.

Proceedings of the International Symposium on Electrical Insulating Materials 99 - 102 2008.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings of the International Symposium on Electrical Insulating Materials

A study on the development of deterioration / performance evaluation method for outdoor electric insulation of polymer materials is pushed forward now in the International Council on Large Electric Systems (CIGRE). The small scale docimasy (Dynamic Drop Test) which could evaluate a disappearance characteristic of the hydrophobicity easily was suggested [1] . This test method is to evaluate the loss of hydrophobicity to drop electrically-charged water droplets on the sample surface continuously. We applied this dynamic drop test (DDT) to polymer materials which differ in the amount of Alumina Tri-Hydrate (ATH) filled and investigated factors about the change of hydrophobicity, in which the surface roughness and difference of the quantity of migration of the low molecular weight (LMW) were examined.

DOI： 10.1109/ISEIM.2008.4664506

Influence of Temperature Variation on Characteristics of ZnO Elements

Y. Miyakawa, T. Sokoda, M. Otsubo and M.Ikuta

Proceedings of 2008 International Symposium on Electrical Insulating Materials 119 - 122 2008.12

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

DOI： 10.1109/ISEIM.2008.4664511

Relation Between Leakage Current and NSDD on the Surface of Polymer Insulator

Y. Yamashita, T. Miyake, H. Haji, T. Sakoda, M. Otsubo

roceedings of 2008 International Symposium on Electrical Insulating Materials 103 - 106 2008.12

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

DOI： 10.1109/ISEIM.2008.4664507

Characteristics Evaluation of the Partial Arc Discharge and the Silicone Rubber Surface by Dynamic Drop Test

高気圧沿面放電による太陽電池用電極溝の作製 Reviewed

濱田俊之, 荒川純一, 大坪昌久, 迫田達也

電気学会論文誌A 128-A ( 12 ) 733 - 739 2008.12

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

Studies on Erosion of Silicone Rubber Exposed to Partial Arc Discharges Reviewed

Kenich Haji, Yong Zhu, Masahisa Otsubo, Tatsuya Sakoda

Polymer Degradation and Stability 93 ( 12 ) 2214 - 2221 2008.12

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

Haji, Kenichi; Shiibara, Daiki; Otsubo, Masahisa, Sakoda Tatsuya, Yoshihiro Arata

2008 Annual Report Conference on Electrical Insulation Dielectric Phenomena 2008 272 - 275 2008.12

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

DOI： 10.1109/CEIDP.2008.4772897

Fabrication of Electrode Groove on Silicon Solar Cell using High-Pressure Surface Discharge

HAMADA Toshiyuki, ARAKAWA Shunichi, OTSUBO Masahisa, SAKODA Tatsuya

IEEJ Transactions on Fundamentals and Materials 128 ( 12 ) 733 - 739 2008.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan

We proposed a low-cost plasma process technique to fabricate narrower front electrode grooves on a single crystalline silicon solar cell, in which the surface discharge operated at high-pressure etched the silicon nitride film of 150 nm thickness on a silicon layer. The results showed that the surface discharge could effectively etch the silicon nitride film in a short time and that a high etching rate more than 3000 nm/min was obtained. The narrow and uniform grooves with the width of less than 70 μm were obtained when the pressure in a chamber, the back electrode length and the etching time were 152 kPa, 2 mm and 10 s, respectively. The narrower electrode groove could be obtained when the back electrode length was short and the pressure was high.

DOI： 10.1541/ieejfms.128.733

Studies on Erosion of Silicone Rubber Exposed to Partial Arc Discharges

Kenich Haji, Yong Zhu, Masahisa Otsubo, Tatsuya Sakoda

Polymer Degradation and Stability 93 ( 12 ) 2214 - 2221 2008.12

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

DOI： 10.1016/j.polymdegradstab.2008.05.025

Studies of Elastic Waves in Ethylene Propylene Rubber Using Acoustic Emission Sensor

Masanori Takaoka, Tatsuya Sakoda, Masahisa Otsubo, Shigeru Akaiwa, Masatoshi Iki, Shigeharu Nakano

IEEE (Institute of Electrical Engineers of Japan) Transaction on Fundamentals and Materials Society 128 ( 10 ) 641 - 646 2008.12

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

DOI： 10.1541/ieejfms.128.641

Surface Modification of Carbon Electrode using Argon Plasma

Etching of Silicon Nitride Using Atmospheric Pressure Surface Discharge Plasma Reviewed

T. HAMADA, M. OTSUBO, T. SAKODA

The 7th International Conference on Materials Processing for AMFT7005_1 - 3 2008.11

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

D. Tashima, A. Sakamoto, M. Taniguchi, T. Sakoda, M. Otsubo

Vacuum 83 ( 3 ) 695 - 698 2008.10

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

DOI： 10.1016/j.vacuum.2008.04.060