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Dive into the research topics where Koichi Hirata is active.

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Featured researches published by Koichi Hirata.


Complete Guide to Semiconductor Devices, Second Edition | 2012

Schottky barrier diode

Tetsuro Asano; Katsuaki Onada; Yoshibumi Nakajima; Shigeyuki Murai; Hisaaki Tominaga; Koichi Hirata; Mikito Sakakibara; Hidetoshi Ishihara

In the central region of the substrate, is formed adjacent to the second semiconductor layer and second semiconductor layer adjacent to the guard ring across a third insulating layer between the second semiconductor layer. I.e., between the second semiconductor layer and the second semiconductor layer, forming a third insulating layer covering the first semiconductor layer on the first surface of the substrate (the main surface) is exposed. Thus, the third insulating layer between the second semiconductor layer and the second semiconductor layer, the electrical insulation between the first semiconductor layer and the metal layer of the substrate first face 11a 11 exposed.


Archive | 2001

Compound semiconductor switching device for high frequency switching

Tetsuro Asano; Takayoshi Higashino; Koichi Hirata


Archive | 2001

Compound semiconductor device with depletion layer stop region

Tetsuro Asano; Toshikazu Hirai; Takayoshi Higashino; Koichi Hirata; Mikito Sakakibara


Archive | 2002

Semiconductor device manufacturing method using mask slanting from orientation flat

Tetsuro Asano; Masahiro Uekawa; Koichi Hirata; Mikita Sakakibara


Archive | 2001

Semiconductor device having capacitance element and method of producing the same

Nobuyuki Sekikawa; Koichi Hirata; Wataru Andoh; Noriyasu Katagiri


Archive | 2002

Manufacturing method of schottky barrier diode

Tetsuro Asano; Katsuaki Onoda; Yoshibumi Nakajima; Shigeyuki Murai; Hisaaki Tominaga; Koichi Hirata; Mikito Sakakibara; Hidetoshi Ishihara


Archive | 2002

Integrated schottky barrier diode and manufacturing method thereof

Tetsuro Asano; Katsuaki Onoda; Yoshibumi Nakajima; Shigeyuki Murai; Hisaaki Tominaga; Koichi Hirata; Mikito Sakakibara; Hidetoshi Ishihara


Archive | 2001

Insulated gate semiconductor device and its manufacturing method

Nobuyuki Sekikawa; Masaaki Momen; Wataru Andoh; Koichi Hirata


Archive | 2003

Method of manufacturing insulated gate semiconductor device

Nobuyuki Sekikawa; Masaaki Momen; Wataru Andoh; Koichi Hirata


Archive | 2009

Mask and the production method for producing compound semiconductor device with the mask

Tetsuo Asano; Masahiro Uekawa; Koichi Hirata; Kanto Sakakibara

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