Patents by Inventor Seong-Dae Lee

Seong-Dae Lee 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: 8048800
    Abstract: A method of fabricating a two-terminal semiconductor component using a trench technique is disclosed that includes forming a trench by etching an etching pattern formed on a substrate on which an active layer having impurities added is grown, forming a front metal layer on a front upper surface of the substrate by using an evaporation method or a sputtering method after removing the etching pattern, forming a metal plated layer on the front surface of the substrate on which the front metal layer is formed, polishing a lower surface of the substrate by using at least one of a mechanical polishing method and a chemical polishing method until the front metal layer is exposed, forming a rear metal layer on the polished substrate, and removing each component by using at least one of a dry etching method and a wet etching method.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: November 1, 2011
    Assignee: Dongguk University Industry—Academic Corporation Foundation
    Inventors: Jin-Koo Rhee, Seong-Dae Lee, Mi-Ra Kim, Dae-Hong Min, Wan-Joo Kim
  • Publication number: 20110059609
    Abstract: A method of fabricating a two-terminal semiconductor component using a trench technique is disclosed that includes forming a trench by etching an etching pattern formed on a substrate on which an active layer having impurities added is grown, forming a front metal layer on a front upper surface of the substrate by using an evaporation method or a sputtering method after removing the etching pattern, forming a metal plated layer on the front surface of the substrate on which the front metal layer is formed, polishing a lower surface of the substrate by using at least one of a mechanical polishing method and a chemical polishing method until the front metal layer is exposed, forming a rear metal layer on the polished substrate, and removing each component by using at least one of a dry etching method and a wet etching method.
    Type: Application
    Filed: October 22, 2009
    Publication date: March 10, 2011
    Applicant: Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Jin-Koo Rhee, Seong-Dae Lee, Mi-Ra Kim, Dae-Hong Min
  • Patent number: 7300813
    Abstract: The present invention relates to the manufacture of a semiconductor switch for use in a variety of communication systems, and particularly to the manufacture of a RF micro-machined switch of pull-up type, wherein an electrostatic electrode is used so as to cause the contact pad involved in the operation of the switch to be pulled upward from below. The RF micro-machined switch of pull-up type according to the invention has a high isolation characteristic for shorting and opening the circuit and needs a low driving voltage, so that miniaturization of communication system is possible because a circuit for booting driving voltage is not required within the system. Further, the characteristic of switch is little changed after a long use because the metal composing the contact pad experiences little deformation during operation, whereby the semi-permanent use of switch is possible.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: November 27, 2007
    Assignee: Dongguk University Indusrty-Academic Cooperation Foundation
    Inventors: Jin-Koo Rhee, Seong-Dae Lee
  • Publication number: 20070065978
    Abstract: The present invention relates to the manufacture of a semiconductor switch for use in a variety of communication systems, and particularly to the manufacture of a RF micro-machined switch of pull-up type, wherein an electrostatic electrode is used so as to cause the contact pad involved in the operation of the switch to be pulled upward from below. The RF micro-machined switch of pull-up type according to the invention has a high isolation characteristic for shorting and opening the circuit and needs a low driving voltage, so that miniaturization of communication system is possible because a circuit for booting driving voltage is not required within the system. Further, the characteristic of switch is little changed after a long use because the metal composing the contact pad experiences little deformation during operation, whereby the semi-permanent use of switch is possible.
    Type: Application
    Filed: September 20, 2005
    Publication date: March 22, 2007
    Applicant: Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Jin-Koo Rhee, Seong-Dae Lee