Patents by Inventor Hwan Sun Kim

Hwan Sun Kim 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).

  • Electronic device and method for manufacturing electronic device
    Patent number: 11950522
    Abstract: A method for manufacturing an electronic device including a semiconductor memory may include forming a first carbon electrode material, surface-treating the first carbon electrode material to decrease a surface roughness of the first carbon electrode material, and forming a second carbon electrode material on the treated surface of the first carbon electrode material. The second carbon electrode material may have a thickness that is greater than a thickness of the first carbon electrode material.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: April 2, 2024
    Assignee: SK hynix Inc.
    Inventors: Myoung Sub Kim, Tae Hoon Kim, Beom Seok Lee, Seung Yun Lee, Hwan Jun Zang, Byung Jick Cho, Ji Sun Han
  • Vertically-shifting electrostatic actuator and optical scanner employing the same
    Patent number: 11789254
    Abstract: An optical scanner includes a mirror configured to reflect an incident light and a vertically-shifting electrostatic actuator configured to oscillate the mirror. The electrostatic actuator includes a frame having an installation space in a central portion and a drive electrode, a stationary electrode, a shifter, and a force application part installed in the installation space. Drive electrode fingers in the drive electrode and stationary electrode fingers in the stationary electrode are alternately disposed. The shifter may be connected either between the frame and the drive electrode or between the frame and the stationary electrode and vertically shifts either the drive electrode or the stationary electrode connected to the shifter when a vertical force is applied through the force application part.
    Type: Grant
    Filed: October 12, 2020
    Date of Patent: October 17, 2023
    Assignee: KOREA OPTRON CORP.
    Inventors: Yun Goo Kim, Hwan Sun Kim, Eun Joong Lee, Yong Kook Kim
  • VERTICALLY-SHIFTING ELECTROSTATIC ACTUATOR AND OPTICAL SCANNER EMPLOYING THE SAME
    Publication number: 20210132370
    Abstract: A vertically-shifting electrostatic actuator and an optical scanner employing the electrostatic actuator are disclosed. The optical scanner includes a mirror configured to reflect an incident light and an electrostatic actuator configured to oscillate the mirror. The electrostatic actuator includes a frame having an installation space in a central portion and a drive electrode, a stationary electrode, a shifter, and a force application part installed in the installation space. Drive electrode fingers in the drive electrode and stationary electrode fingers in the stationary electrode are alternately disposed. The shifter may be connected either between the frame and the drive electrode or between the frame and the stationary electrode and vertically shifts either the drive electrode or the stationary electrode connected to the shifter when a vertical force is applied through the force application part.
    Type: Application
    Filed: October 12, 2020
    Publication date: May 6, 2021
    Inventors: Yun Goo Kim, Hwan Sun Kim, Eun Joong Lee, Yong Kook Kim