Patents by Inventor Chikayoshi Yamamoto

Chikayoshi Yamamoto 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).

  • Polishing apparatus
    Publication number: 20050040050
    Abstract: A polishing apparatus for polishing a workpiece by utilizing a fluid including abrasive particles having a dielectric property. The polishing apparatus includes an electrode for applying processing pressure to the abrasive particles on the workpiece and having electrode elements for collecting and arranging the abrasive particles by a Coulomb force produced by application of an alternating-current voltage to the electrode, and a driving device for driving the electrode.
    Type: Application
    Filed: October 7, 2004
    Publication date: February 24, 2005
    Applicant: Governor of Akita prefecture
    Inventors: Yoichi Akagami, Yukichi Satou, Chikayoshi Yamamoto
  • Polishing apparatus and method
    Patent number: 6857940
    Abstract: A polishing method with a polishing apparatus includes an electrode constituted as a plurality of electrode elements, a device of driving the electrode, and dielectric abrasive particles disposed between the electrode and a workpiece. Polishing pressure is applied to the particles by a Coulomb force generated when an alternating-current voltage is applied to the electrode.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: February 22, 2005
    Assignee: Governor of Akita prefecture
    Inventors: Yoichi Akagami, Yukichi Satou, Chikayoshi Yamamoto
  • Polishing apparatus
    Publication number: 20030068964
    Abstract: A polishing apparatus includes an electrode constituted as a plurality of electrode elements, a device of driving the electrode, and dielectric abrasive particles disposed between the electrode and a workpiece. Polishing pressure is applied to the particles by a Coulomb force generated when an alternating-current voltage is applied to the electrode.
    Type: Application
    Filed: January 25, 2002
    Publication date: April 10, 2003
    Applicant: Governor of Akita prefecture
    Inventors: Yoichi Akagami, Yukichi Satou, Chikayoshi Yamamoto