Patents by Inventor Kousaku Takasaka

Kousaku Takasaka 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).

  • Apparatus for measuring film thickness
    Patent number: 4606641
    Abstract: An elliptically polarized monochromatic light is obtained from monochromatic light select unit and is reflected at an interface between an objective film and substrate. An extinction wavelength of the reflected light, when the amount thereof detected at photodetector becomes zero, is detected at control unit and the true thickness of the film is calculated from the detected extinction wavelength.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: August 19, 1986
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Takeo Yamada, Kousaku Takasaka