Tadahiro Ohmi, Naomichi Yonekawa, Hiroyuki Horiki, Toshimitsu Kaji, Fumitomo Kunimoto, Takeo Tamaki: Rotary cleaning method with chemical solutions and rotary cleaning apparatus with chemical solutions. Tadahiro Ohmi, Nisso Engineering, MTC, Baker & Daniels, January 30, 1996: US05487398 (46 worldwide citation)

To provide a cleaning method and a cleaning apparatus for decreasing the total cost by producing high-performance semiconductor using silicon wafers with cleaner surface, decreasing the semiconductor production cost, decreasing the consumption of chemical solutions and the cleaning time by using a n ...

Tadahiro Ohmi, Takahisa Nitta, Masaki Hirayama, Haruyuki Takano, Ryu Kaiwara: Plasma device. Tadahiro Ohmi, Randall J Knuth, March 19, 2002: US06357385 (45 worldwide citation)

A plasma device which is provided with a container, a gas supply system, and an exhaust system. The container is composed of a first dielectric plate made of a material capable of transmitting microwaves. An antenna for radiating microwaves is located on the outside of the container, and an electrod ...

Tadahiro Ohmi, Hiroshi Suzuki, Masaki Hirayama: Semiconductor device utilizing silicide reaction. Tadahiro Ohmi, Baker & Daniels, February 3, 1998: US05714795 (44 worldwide citation)

A semiconductor storage device capable of high-speed writing and reading and having extremely high reliability. The semiconductor device includes a plurality of cells each having a semiconductor layer between a pair of conductors. At least one of the pair of conductors is made of a metal and the sem ...

Tadahiro Ohmi, Masahiro Miki, Hirohisa Kikuyama, Matagoro Maeno: Metal material with film passivated by fluorination and apparatus composed of the metal material. Armstrong Nikaido Marmelstein Kubovcik & Murray, April 23, 1991: US05009963 (44 worldwide citation)

A metal material characterized in that a film passivated by fluorination which is mainly composed of a metal fluoride substantially satisfying stoichiometric ratio is formed at least partially on a surface of a metal of the metal material, and an apparatus at least partially composed of the metal ma ...


Tadahiro Ohmi, Senri Ojima, Takahisa Nitta: Cleaning method for peeling and removing photoresist. Tadahiro OHMI, Randall J Knuth, January 12, 1999: US05858106 (42 worldwide citation)

A cleaning method for peeling and removing photoresists from a semiconductor by applying ultrasound to a cleaning solution comprising a mixture of an organic solvent diluted with pure water and halogenated alkali metal salts, hydrofluoric acid, or ammonium fluoride. The cleaning method removes organ ...

Tadahiro Ohmi: Semiconductor manufacturing apparatus. Oblon Fisher Spivak McClelland & Maier, April 25, 1989: US04824546 (42 worldwide citation)

A semiconductor manufacturing for depositing an insulating thin film on a surface of a semiconductor substrate in a vacuum vessel at an atmosphere of reduced pressure, wherein radiofrequency powers each having different first and second radiofrequencies are applied respectively to a target electrode ...

Tadahiro Ohmi, Kazuhiko Sugiyawa, Fumio Nakahara, Masaru Umeda: Process gas supply piping system. Tadahiro OHMI, Albert L Jeffers, Anthony Niewyk, April 17, 1990: US04917136 (39 worldwide citation)

This invention relates to the supply piping system of the process gas for various types of thin-film making and fine pattern dry etching process, and more particularly to the process gas supply system, which makes it possible to form high quality thin films and to perform high quality etching.

Tadahiro Ohmi: Semiconductor manufacturing apparatus. Oblon Spivak McClelland Maier & Neustadt, October 17, 1989: US04874494 (39 worldwide citation)

A bias-sputtering apparatus is characterized by having a radio-frequency power source and an exhaust unit and means for impressing a DC bias to at least one of the susceptor and the target electrodes. That is, the invention is a semiconductor manufacturing apparatus for depositing a thin film on the ...

Junichi Nishizawa, Tadahiro Ohmi: Integrated circuit employing insulated gate electrostatic induction transistor. Handotai Kenkyu Shinkokai, Sughrue Mion Zinn Macpeak and Seas, February 17, 1987: US04644386 (38 worldwide citation)

An insulated gate electrostatic induction transistor and an integrated circuit employing such an insulating gate electrostatic induction transistor as a drive transistor. A highly resistive channel region is provided on a semiconductor substrate of higher conductivity. A highly doped source region i ...