Patents by Inventor Ji-Hyuk Kim

Ji-Hyuk 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).

  • Patent number: 6775050
    Abstract: Disclosed is a micromirror actuator that includes: a substrate provided with an insulating layer formed thereon; two lower columns spaced from each other by a designated distance, and formed on the insulating layer; a first torsion bar extending over upper surfaces of the lower columns; a second torsion bar formed so that the first and second torsion bars are orthogonal to each other; four electrodes, each disposed in four areas formed by the orthogonal crossing of the first and second torsion bars, formed on the insulating layer; two upper columns formed on an upper surface of the second torsion bar so that the upper surfaces of the upper columns are located at higher positions than the upper surfaces of the electrodes; and a micromirror located on the upper surfaces of the upper columns so that the micromirror is supported by the upper columns.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: August 10, 2004
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Euisik Yoon, Jun-Bo Yoon, Hyung-Kew Lee, Ji-Hyuk Kim
  • Publication number: 20030223103
    Abstract: Disclosed is a micromirror actuator with the degrees of freedom of two axes operated by an electrostatic force. The micromirror actuator comprises: a substrate provided with an insulating layer formed thereon; two lower columns spaced from each other by a designated distance, and formed on the insulating layer; a first torsion bar extending over upper surfaces of the lower columns; a second torsion bar formed so that the first and second torsion bars are orthogonal to each other; four electrodes, each disposed in four areas formed by the orthogonal crossing of the first and second torsion bars, formed on the insulating layer; two upper columns formed on an upper surface of the second torsion bar so that upper surfaces of the upper columns are located at higher positions than upper surfaces of the electrodes; and a micromirror located on the upper surfaces of the upper columns so that the micromirror is supported by the upper columns.
    Type: Application
    Filed: May 14, 2003
    Publication date: December 4, 2003
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Euisik Yoon, Jun-Bo Yoon, Hyung-Kew Lee, Ji-Hyuk Kim