Patents by Inventor Tatsuro Ohshita

Tatsuro Ohshita 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: 9252001
    Abstract: A plasma processing apparatus includes a first electrode and a second electrode so arranged in the upper portion of a processing chamber as to face a mounting table, a gas supply unit for supplying a processing gas between the first electrode and the second electrode, a RF power supply unit for applying a RF power between the first electrode and the second electrode for converting the process gas supplied between the electrodes into a plasma, and a gas exhaust unit for evacuating the inside of the processing chamber to a vacuum level from the lower portion of the processing chamber. Since the electron temperature in the plasma is low near a substrate on the mounting table, damage to the substrate caused by the plasma can be suppressed. In addition, since a metal can be used as a material for the processing chamber, the processing chamber can have good temperature controllability.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: February 2, 2016
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Ikuo Sawada, Peter Ventzek, Tatsuro Ohshita, Kazuyoshi Matsuzaki, Songyun Kang
  • Publication number: 20150332898
    Abstract: Provided is a plasma processing apparatus that performs a processing on a processing target substrate by applying plasma of a processing gas on the processing target substrate. The plasma processing apparatus includes: a processing container configured to accommodate the processing target substrate; a lower electrode disposed in the processing container to mount the processing target substrate thereon; an upper electrode disposed in the processing container to face the lower electrode with a processing space being interposed therebetween; a high frequency power source configured to apply a high frequency power between the upper electrode and the lower electrode; a main magnet unit including one or more annular main electromagnetic coils arranged around a central axis; and an auxiliary magnet unit configured to form a magnetic field that perpendicularly or obliquely crosses the central axis in the processing space.
    Type: Application
    Filed: April 29, 2015
    Publication date: November 19, 2015
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Akihiro YOKOTA, Shinji HIMORI, Tatsuro OHSHITA, Shu KUSANO
  • Publication number: 20140138356
    Abstract: A plasma processing apparatus includes a first electrode and a second electrode so arranged in the upper portion of a processing chamber as to face a mounting table, a gas supply unit for supplying a processing gas between the first electrode and the second electrode, a RF power supply unit for applying a RF power between the first electrode and the second electrode for converting the process gas supplied between the electrodes into a plasma, and a gas exhaust unit for evacuating the inside of the processing chamber to a vacuum level from the lower portion of the processing chamber. Since the electron temperature in the plasma is low near a substrate on the mounting table, damage to the substrate caused by the plasma can be suppressed. In addition, since a metal can be used as a material for the processing chamber, the processing chamber can have good temperature controllability.
    Type: Application
    Filed: January 27, 2014
    Publication date: May 22, 2014
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Ikuo Sawada, Peter Ventzek, Tatsuro Ohshita, Kazuyoshi Matsuzaki, Songyun Kang
  • Patent number: 8636871
    Abstract: A plasma processing apparatus includes a first electrode and a second electrode so arranged in the upper portion of a processing chamber as to face a mounting table, a gas supply unit for supplying a processing gas between the first electrode and the second electrode, a RF power supply unit for applying a RF power between the first electrode and the second electrode for converting the process gas supplied between the electrodes into a plasma, and a gas exhaust unit for evacuating the inside of the processing chamber to a vacuum level from the lower portion of the processing chamber. Since the electron temperature in the plasma is low near a substrate on the mounting table, damage to the substrate caused by the plasma can be suppressed. In addition, since a metal can be used as a material for the processing chamber, the processing chamber can have good temperature controllability.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: January 28, 2014
    Assignee: Tokyo Electron Limited
    Inventors: Ikuo Sawada, Peter Ventzek, Tatsuro Ohshita, Kazuyoshi Matsuzaki, Songyun Kang
  • Publication number: 20100297346
    Abstract: A vaporizing unit, in supplying a gas material produced by vaporizing a liquid material onto a substrate to conduct a film forming process, can vaporize the liquid material with high efficiency to suppress generation of particles. With the vaporizing unit, positively or negatively charged bubbles, which have a diameter of 1000 nm or less, are produced in the liquid material, and the liquid material is atomized to form a mist of the liquid material. Further, the mist of the liquid material is heated and vaporized. The fine bubbles are uniformly dispersed in advance in the liquid material, so that very fine and uniform mist particles of the liquid material are produced when the liquid material is atomized, which makes heat exchange readily conducted. By vaporizing the mist of the liquid material, vaporization efficiency is enhanced, and generation of particles can be suppressed.
    Type: Application
    Filed: August 11, 2008
    Publication date: November 25, 2010
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Ikuo Sawada, Sumie Nagaseki, Kyoko Ikeda, Tatsuro Ohshita
  • Publication number: 20100006543
    Abstract: A plasma processing apparatus includes a first electrode and a second electrode so arranged in the upper portion of a processing chamber as to face a mounting table, a gas supply unit for supplying a processing gas between the first electrode and the second electrode, a RF power supply unit for applying a RF power between the first electrode and the second electrode for converting the process gas supplied between the electrodes into a plasma, and a gas exhaust unit for evacuating the inside of the processing chamber to a vacuum level from the lower portion of the processing chamber. Since the electron temperature in the plasma is low near a substrate on the mounting table, damage to the substrate caused by the plasma can be suppressed. In addition, since a metal can be used as a material for the processing chamber, the processing chamber can have good temperature controllability.
    Type: Application
    Filed: December 27, 2007
    Publication date: January 14, 2010
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Ikuo Sawada, Peter Ventzek, Tatsuro Ohshita, Kazuyoshi Matsuzaki, Songyun Kang