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Featured researches published by Chiaki Kudo.


Materials Science Forum | 2008

Normally-Off 1400V/30A 4H-SiC DACFET and its Application to DC-DC Converter

Makoto Kitabatake; Masaki Tagome; Shun Kazama; Kenya Yamashita; Koichi Hashimoto; Kunimasa Takahashi; Osamu Kusumoto; Kazuya Utsunomiya; Masashi Hayashi; Masao Uchida; R. Ikegami; Chiaki Kudo; Shin Hashimoto

Large (3.6 x 3.6 mm2) chips of the SiC DACFET were fabricated and mounted in TO220 packages. The drain-source avalanche breakdown voltage without any gate bias (Vgs=0V) is measured to be >1400V. The SiC DACFET keeps the normally-off characteristics even at 150°C. Ron and specific Ron of the SiC DACFET is measured to be 62mΩ and 6.7 mΩcm2 at RT while those at 150°C change to 107 mΩ and 11.6 mΩcm2. The 400V / 3 kW DC-DC switched-mode power-conversion circuit with 100kHz switching was fabricated using the SiC DACFET and the SiC SBD. The turn-off switching loss reduces dramatically using the SiC-DACFET down to 77μJ/pulse which is less than 1/10 of that using the Si-IGBT.


Archive | 1997

Method of manufacturing trench-isolated semiconductor device

Takaaki Ukeda; Chiaki Kudo; Toshiki Yabu


Archive | 1991

Method for manufacturing a semiconductor device using a heat treatment according to a temperature profile that prevents grain or particle precipitation during reflow

Takatoshi Yasui; Chiaki Kudo; Ichiro Nakao; Toyokazu Fujii; Yuka Terai; Shin-ichi Imai; Hiroshi Yamamoto; Yasushi Naito


Archive | 1999

Trench isolated semiconductor device

Takaaki Ukeda; Chiaki Kudo; Toshiki Yabu


Archive | 1997

Method of manufacturing a semiconductor apparatus having a silicon-on-insulator structure

Takashi Nakabayashi; Chiaki Kudo


Archive | 2000

Semiconductor device, and semiconductor integrated device

Takashi Nakabayashi; Chiaki Kudo


Archive | 2004

Substrate polishing method and substrate polishing management system

Katsuyuki Ikenouchi; Chiaki Kudo; Kazuo Tanimoto; 千秋 工藤; 勝行 池ノ内; 一夫 谷本


Archive | 2008

Silicon carbide semiconductor element, and manufacturing method thereof

Chiaki Kudo; Kunimasa Takahashi; 千秋 工藤; 邦方 高橋


Archive | 2005

Signal processing method and image capturing device

Chiaki Kudo


Archive | 2004

Method and apparatus for correcting pixel image signal intensity

Chiaki Kudo

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