Patents by Inventor Hwajun NOH

Hwajun NOH 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: 11396704
    Abstract: A substrate holder according to one embodiment of the present disclosure comprises a stage made of a dielectric material and configured to support a substrate; an attraction electrode provided in the stage and configured to electrostatically attract the substrate; and a heater configured to heat the stage. By applying a DC voltage to the attraction electrode, the substrate is electrostatically attached to a surface of the stage by a Johnsen-Rahbek force. The stage comprises an annular close contact area with which the substrate comes into close contact at a position corresponding to an outer periphery of the substrate on the surface of the stage; and a groove provided in an annular shape in a portion outside the close contact area, and a conductive deposition film formed by the raw material gas is accumulated in the groove.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: July 26, 2022
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Toshiaki Fujisato, Takashi Mochizuki, Daisuke Toriya, Kouki Suzuki, Hwajun Noh
  • Publication number: 20200165723
    Abstract: A substrate holder according to one embodiment of the present disclosure comprises a stage made of a dielectric material and configured to support a substrate; an attraction electrode provided in the stage and configured to electrostatically attract the substrate; and a heater configured to heat the stage. By applying a DC voltage to the attraction electrode, the substrate is electrostatically attached to a surface of the stage by a Johnsen-Rahbek force. The stage comprises an annular close contact area with which the substrate comes into close contact at a position corresponding to an outer periphery of the substrate on the surface of the stage; and a groove provided in an annular shape in a portion outside the close contact area, and a conductive deposition film formed by the raw material gas is accumulated in the groove.
    Type: Application
    Filed: November 27, 2019
    Publication date: May 28, 2020
    Inventors: Toshiaki FUJISATO, Takashi MOCHIZUKI, Daisuke TORIYA, Kouki SUZUKI, Hwajun NOH