Patents by Inventor Joong Tak Han

Joong Tak Han 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: 9123914
    Abstract: Provided are an electronic device and a fabrication method thereof. The electronic device according to the concept of the present invention includes auxiliary interconnections disposed on a substrate, a light extraction layer that is provided on the substrate and fills between the auxiliary interconnection, and a first electrode provided on the auxiliary interconnections and the light extraction layer, wherein the light extraction layer may have a first surface facing the substrate and a second surface opposite to the first surface, the first surface may have protrusions, and the auxiliary interconnections may include a material having a lower resistance than the first electrode. Since electrical properties of the electronic device are improved, uniform light emission characteristics may be realized.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: September 1, 2015
    Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE, KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Jeong Ik Lee, Jonghee Lee, Doo-Hee Cho, Jun-Han Han, Geon-Woong Lee, Joong-Tak Han, Do-Geun Kim, Sunghoon Jung
  • Publication number: 20150008401
    Abstract: Provided are an electronic device and a fabrication method thereof. The electronic device according to the concept of the present invention includes auxiliary interconnections disposed on a substrate, a light extraction layer that is provided on the substrate and fills between the auxiliary interconnection, and a first electrode provided on the auxiliary interconnections and the light extraction layer, wherein the light extraction layer may have a first surface facing the substrate and a second surface opposite to the first surface, the first surface may have protrusions, and the auxiliary interconnections may include a material having a lower resistance than the first electrode. Since electrical properties of the electronic device are improved, uniform light emission characteristics may be realized.
    Type: Application
    Filed: May 5, 2014
    Publication date: January 8, 2015
    Applicants: Electronics and Telecommunications Research Institute, Korea Electrotechnology Research Institute, Korea Institute of Machinery & Materials
    Inventors: Jeong Ik LEE, Jonghee LEE, Doo-Hee CHO, Jun-Han HAN, Geon-Woong LEE, Joong-Tak HAN, Do-Geun KIM, Sunghoon JUNG
  • Patent number: 8637122
    Abstract: This invention relates to a method of manufacturing a transparent conductive film containing carbon nanotubes and a binder, in which the carbon nanotubes are subjected to acid treatment, dispersion in a solvent, mixing with the binder, and application on the substrate, and to a transparent conductive film manufactured thereby. The method includes subjecting carbon nanotubes having an outer diameter of less than 15 nm to acid treatment to thus purify and surface functionalize them, followed by dispersing the treated carbon nanotubes in a solvent along with the binder, or mixing a carbon nanotube solution using a polar or nonpolar solvent with a binder solution, and applying the mixture on the substrate.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: January 28, 2014
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Geon-Woong Lee, Joong Tak Han, Jong Seok Woo, Sun Young Kim
  • Publication number: 20080286559
    Abstract: This invention relates to a method of manufacturing a transparent conductive film containing carbon nanotubes and a binder, in which the carbon nanotubes are subjected to acid treatment, dispersion in a solvent, mixing with the binder, and application on the substrate, and to a transparent conductive film manufactured thereby. The method includes subjecting carbon nanotubes having an outer diameter of less than 15 nm to acid treatment to thus purify and surface functionalize them, followed by dispersing the treated carbon nanotubes in a solvent along with the binder, or mixing a carbon nanotube solution using a polar or nonpolar solvent with a binder solution, and applying the mixture on the substrate.
    Type: Application
    Filed: December 4, 2007
    Publication date: November 20, 2008
    Applicant: Korea Electrotechnology Research Institute
    Inventors: Geon-Woong Lee, Joong Tak Han, Jong Seok Woo, Sun Young Kim