Patents by Inventor Kohei Watanuki

Kohei Watanuki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8573151
    Abstract: A conventional microwave plasma processing apparatus, even when krypton (Kr) is used as a plasma-generation gas, can only obtain an oxide film or a nitride film having the same level of characteristics as those obtained when a rare gas such as argon (Ar) is used as a plasma-generation gas. Accordingly, instead of forming a dielectric window of a microwave plasma processing apparatus with only a ceramic member, a planarization film capable of obtaining a stoichiometric SiO2 composition by thermal treatment is coated on one of a plurality of surfaces of the ceramic member, the surface facing a process space, and then thermally-treated, thereby forming a planarization insulation film having a very flat and dense surface. A corrosion-resistant film is formed on the planarization insulation film.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: November 5, 2013
    Assignees: Tokyo Electron Limited, Tohoku University
    Inventors: Tadahiro Ohmi, Masaki Hirayama, Tetsuya Goto, Yasuyuki Shirai, Masafumi Kitano, Kohei Watanuki, Takaaki Matsuoka, Shigemi Murakawa
  • Patent number: 8188468
    Abstract: An organometal material gas is supplied into a low electron temperature and high density plasma excited by microwaves to form a thin film of a compound on a substrate as a film forming object. In this case, the temperature of a supply system for the organometal material gas is controlled by taking advantage of the relationship between the vapor pressure and temperature of the organometal material gas.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: May 29, 2012
    Assignees: National University Corporation Tohoku University, Rohm Co., Ltd., Tokyo Electron Limited, Ube Industries, Ltd.
    Inventors: Tadahiro Ohmi, Hirokazu Asahara, Atsutoshi Inokuchi, Kohei Watanuki
  • Publication number: 20120037407
    Abstract: It has been found out that, among transparent conductive layers, a zinc oxide layer has a function of preventing diffusion of sodium. An electronic apparatus is obtained which uses the zinc oxide layer as an electrode of the electronic apparatus and also as a diffusion preventing layer for preventing diffusion of sodium from a glass substrate.
    Type: Application
    Filed: April 10, 2010
    Publication date: February 16, 2012
    Inventors: Tadahiro Ohmi, Hirokazu Asahara, Kohei Watanuki, Kouji Tanaka
  • Publication number: 20110215384
    Abstract: In manufacturing processes of a semiconductor device including a shallow trench element isolation region and an interlayer insulating film of a multilayer structure, it is necessary to repeatedly use CMP, but since the CMP itself is costly, the repeated use of the CMP is a cause to increase the manufacturing cost. As an insulating film for use in a shallow trench (ST) element isolation region and/or a lowermost-layer interlayer insulating film, use is made of an insulating coating film that can be coated by spin coating. The insulating coating film has a composition expressed by ((CH3)nSiO2-n/2)x(SiO2)1-x(where n=1 to 3 and 0?x?1.0) and a film with a different relative permittivity k is formed by selecting heat treatment conditions. The STI element isolation region can be formed by modifying the insulating coating film completely to a SiO2 film, while the interlayer insulating film with a small relative permittivity k can be formed by converting it to a state not completely modified.
    Type: Application
    Filed: August 14, 2008
    Publication date: September 8, 2011
    Applicants: National University Corporation Tohoku University, Tokyo Electron Limited, Ube Industries, Ltd., Ube-Nitto Kasei Co., Ltd.
    Inventors: Tadahiro Ohmi, Takaaki Matsuoka, Atsutoshi Inokuchi, Kohei Watanuki, Tadashi Koike, Tatsuhiko Adachi
  • Publication number: 20110127075
    Abstract: An insulative coat film comprising one or two or more kinds of oxides having a dielectric constant (k) of 2.5 or smaller and expressed by a general formula of ((CH3)nSiO2-n/2)x(SiO2)1-x (where n=1 to 3, x?1) is used to form an interlayer insulation film. The insulative coat film applied by spin-coating is flat without reflecting underlying unevenness, and the heat-treated film has surface roughness of 1 nm or less in Ra and 20 nm or less in a P-V value. The interlayer insulation film containing the insulative coat film can have a wiring structure and an electrode formed only by etching without need of a CMP process.
    Type: Application
    Filed: August 14, 2008
    Publication date: June 2, 2011
    Applicants: NATIONAL UNIVERSITY CORPORATION TOHOKU UNIVERSITY, TOKYO ELECTRON LIMITED, UBE INDUSTRIES, LTD., UBE-NITTO KASEI CO., LTD.
    Inventors: Tadahiro Ohmi, Takaaki Matsuoka, Atsutoshi Inokuchi, Kohei Watanuki, Tadashi Koike, Tatsuhiko Adachi
  • Publication number: 20110094781
    Abstract: An electronic device comprises a glass substrate (10) containing sodium, and a sodium diffusion-preventing film (11) which is a planarization coating film formed on the glass substrate (10). An electronic element (12) is formed on the sodium diffusion-preventing film (11).
    Type: Application
    Filed: June 25, 2009
    Publication date: April 28, 2011
    Inventors: Tadahiro Ohmi, Kohei Watanuki, Hirokazu Suzuki
  • Publication number: 20100203713
    Abstract: An object of this invention is to provide a method for manufacturing an electronic device wherein a conductor layer is uniformly formed on a substrate having a super large area. In the method for manufacturing the electronic device, a metal film for forming a gate electrode is selectively embedded in a transparent resin film formed on a substrate, and the metal film is formed by sputtering directly on the substrate at the gate electrode portion, and on an insulating coat film on portions other than the gate electrode portion. The metal film on the insulating coat film is removed by chemical liftoff with removal of the insulating coat film by etching.
    Type: Application
    Filed: September 5, 2008
    Publication date: August 12, 2010
    Inventors: Tadahiro Ohmi, Makoto Fujimura, Tadashi Koike, Akinori Bamba, Akihiro Kobayashi, Kohei Watanuki
  • Publication number: 20100139762
    Abstract: An organometal material gas is supplied into a low electron temperature and high density plasma excited by microwaves to form a thin film of a compound on a substrate as a film forming object. In this case, the temperature of a supply system for the organometal material gas is controlled by taking advantage of the relationship between the vapor pressure and temperature of the organometal material gas.
    Type: Application
    Filed: May 2, 2008
    Publication date: June 10, 2010
    Applicants: NATIONAL UNIVERSITY CORP TOHOKU UNIVERSITY, ROHM CO., LTD., TOKYO ELECTRON LIMITED, UBE INDUSTRIES, LTD.
    Inventors: Tadahiro Ohmi, Hirokazu Asahara, Atsutoshi Inokuchi, Kohei Watanuki
  • Publication number: 20100059820
    Abstract: A thin-film transistor (TFT) has a gate insulating film excellent in transparency and flatness. The gate insulating film is formed by a transparent insulating film (131) which is composed of an oxide represented by RxMOy and which is arranged between a gate electrode and a semiconductor layer. The transparent insulating film (131) is made of a coating agent which is composed of one mixed liquid obtained by dissolving or dispersing a condensate, which is obtained by subjecting a compound represented by RxMXm-x (where R represents a non-hydrolyzable substituent, M represents Si, Ti, Al, Zr, Zn, Sn or In, X represents a hydrolyzable substituent, x represents an integer of 0-3, and m represents the valence of M) to a hydrolysis-condensation reaction, in an organic solvent, water or their mixed solvent, or alternatively a coating agent which is obtained by mixing two or more of such mixed liquids.
    Type: Application
    Filed: December 19, 2007
    Publication date: March 11, 2010
    Applicants: NATIONAL UNIVERSITY CORPORATION TOHOKU UNIVERSITY, ZEON CORPORATION, UBE-NITTO KASEI CO., LTD., UBE INDUSTRIES, LTD.
    Inventors: Tadahiro Ohmi, Koichi Sugitani, Tadashi Koike, Akinori Bamba, Akihiro Kobayashi, Kohei Watanuki
  • Publication number: 20090218044
    Abstract: A conventional microwave plasma processing apparatus, even when krypton (Kr) is used as a plasma-generation gas, can only obtain an oxide film or a nitride film having the same level of characteristics as those obtained when a rare gas such as argon (Ar) is used as a plasma-generation gas. Accordingly, instead of forming a dielectric window of a microwave plasma processing apparatus with only a ceramic member, a planarization film capable of obtaining a stoichiometric SiO2 composition by thermal treatment is coated on one of a plurality of surfaces of the ceramic member, the surface facing a process space, and then thermally-treated, thereby forming a planarization insulation film having a very flat and dense surface. A corrosion-resistant film is formed on the planarization insulation film.
    Type: Application
    Filed: February 26, 2009
    Publication date: September 3, 2009
    Applicants: TOKYO ELECTRON LIMITED, TOHOKU UNIVERSITY
    Inventors: Tadahiro OHMI, Masaki HIRAYAMA, Tetsuya GOTO, Yasuyuki SHIRAI, Masafumi KITANO, Kohei WATANUKI, Takaaki MATSUOKA, Shigemi MURAKAWA