Katsuhisa Homma
Toshiba
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Publication
Featured researches published by Katsuhisa Homma.
international electron devices meeting | 1987
Shigeya Kimura; Katsuhisa Homma; Masaru Nikaido; Kazuo Kobayashi; Toshiharu Higuchi; Y. Ouchi
A long-life high-reliability Ir-coated dispenser cathode has been developed. To study the life characteristics of Ir-coated dispenser cathode, which is provided with a surface alloy layer of εII, extended life tests were conducted over 10,000h. From this life data, this cathode was estimated to have a 200,000h life at 920°Cb with 0.8A/cm2, and to have a 100,000h life at 980°Cb with 2.5A/cm2before emission decreases by 4%. Further, the experiment equation for surface Ir concentration of the cathodes was deduced from the results of surface analysis. Using this equation, the surface alloy layer was evaluated as extremely stable without substantial degradation during cathode life. Thus, the Ir-coated dispenser cathode has been proved to be exceedingly durable and highly reliable.
Archive | 1998
Naotada Okada; Masahiro Kato; Katsuhisa Homma; Kitio Akiyama; Ryuichi Togawa
Archive | 2010
Katsuhisa Homma; Shinetsu Fujieda
Archive | 1998
Naotada Okada; Masahiro Kato; Katsuhisa Homma
Archive | 2012
Yuichi Shinba; Katsuhisa Homma
Archive | 1998
Naotada Okada; Katsuhisa Homma; Masahiro Kato
Archive | 2009
Shinetsu Fujieda; Katsuhisa Homma; Akiko Suzuki; Tatsuoki Kono
Archive | 2010
Katsuhisa Homma; Hitoshi Chiyoma; Shinetsu Fujieda; Keiko Sakai; Masakuni Ikagawa; Akiko Suzuki
Archive | 2000
Eiichirou Uda; Toshiharu Higuchi; Osamu Nakamura; Kiyomi Koyama; Sadao Matsumoto; Yoshiaki Ouchi; Kazuo Kobayashi; Takashi Sudo; Katsuhisa Homma
Archive | 1999
Eiichirou Uda; Toshiharu Higuchi; Osamu Nakamura; Kiyomi Koyama; Sadao Matsumoto; Yoshiaki Ouchi; Kazuo Kobayashi; Takashi Sudo; Katsuhisa Homma
