Patents by Inventor Masanori Hamajima

Masanori Hamajima 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).

  • Plasma ignition system, plasma ignition method, and plasma generating apparatus
    Patent number: 8716939
    Abstract: Provided is a plasma ignition technique allowing easy and reliable ignition and reignition of plasma without monitoring or manual handling. A plasma ignition system according to this technique is provided with a radio-frequency power supply configured to supply a predetermined high frequency signal to an applied electrode for generating plasma; a matching device configured to match impedance on a side of the radio-frequency power supply and impedance on a side of the applied electrode; a forward wave/reflected wave detector configured to detect a forward wave and a reflected wave of the high frequency signal; a high-voltage generator configured to generate a predetermined high voltage; and a controller configured to superimpose the high voltage on the high frequency signal when a ratio of the reflected wave to the forward wave is greater than a first threshold value.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: May 6, 2014
    Assignee: Shinkawa Ltd.
    Inventors: Tetsuya Utano, Toru Maeda, Jun'ichi Takahira, Masanori Hamajima
  • PLASMA IGNITION SYSTEM, PLASMA IGNITION METHOD, AND PLASMA GENERATING APPARATUS
    Publication number: 20120280618
    Abstract: Provided is a plasma ignition technique allowing easy and reliable ignition and reignition of plasma without monitoring or manual handling. A plasma ignition system according to this technique is provided with a radio-frequency power supply configured to supply a predetermined high frequency signal to an applied electrode for generating plasma; a matching device configured to match impedance on a side of the radio-frequency power supply and impedance on a side of the applied electrode; a forward wave/reflected wave detector configured to detect a forward wave and a reflected wave of the high frequency signal; a high-voltage generator configured to generate a predetermined high voltage; and a controller configured to superimpose the high voltage on the high frequency signal when a ratio of the reflected wave to the forward wave is greater than a first threshold value.
    Type: Application
    Filed: June 7, 2012
    Publication date: November 8, 2012
    Applicant: Shinkawa Ltd.
    Inventors: Tetsuya Utano, Toru Maeda, Jun'ichi Takahira, Masanori Hamajima