Patents by Inventor Joo-Seok Oh

Joo-Seok Oh 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).

  • Publication number: 20240120904
    Abstract: A semiconductor device includes an on-die resistor circuit comprising an on-die resistor, a calibration circuit configured to perform a calibration operation on the on-die resistor, and a calibration control circuit configured to control the calibration operation of the calibration circuit. The calibration circuit includes a current generating circuit configured to supply a calibration current to the on-die resistor and a comparing circuit configured to compare the magnitude of a first input signal that is generated by the calibration current and the on-die resistor with a magnitude of a second input signal that is generated by the calibration current and an external resistor.
    Type: Application
    Filed: February 15, 2023
    Publication date: April 11, 2024
    Applicant: SK hynix Inc.
    Inventors: Dong Seok KIM, Joo Won OH, Keun Jin CHANG
  • Patent number: 11955943
    Abstract: A semiconductor device includes an on-die resistor circuit comprising an on-die resistor, a calibration circuit configured to perform a calibration operation on the on-die resistor, and a calibration control circuit configured to control the calibration operation of the calibration circuit. The calibration circuit includes a current generating circuit configured to supply a calibration current to the on-die resistor and a comparing circuit configured to compare the magnitude of a first input signal that is generated by the calibration current and the on-die resistor with a magnitude of a second input signal that is generated by the calibration current and an external resistor.
    Type: Grant
    Filed: February 15, 2023
    Date of Patent: April 9, 2024
    Assignee: SK hynix Inc.
    Inventors: Dong Seok Kim, Joo Won Oh, Keun Jin Chang
  • Patent number: 10415246
    Abstract: A multiple support wall structure according to the present invention includes: a pair of top and bottom support plates that has a plurality of rectangular projective islands separated by lattice-shaped projections protruding in the shape of a go board, and protruding upward in the opposite direction to the lattice-shaped projections; and a intermediate reinforcing plate that is disposed between the top and bottom support plates, has upward projective insertions protruding in a shape corresponding to the rectangular islands to be fitted in the rectangular islands of the top support plate, has top grooves formed laterally and longitudinally between the upward projective insertions to fit the lattice-shaped projections, has downward projective insertions formed in the same shape as but in the opposite direction to the upward projective insertions in spaces diagonally adjacent to the upward projective insertions, and has bottom grooves formed laterally and longitudinally between the downward projective insertions
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: September 17, 2019
    Inventors: Chung Gi Kim, Il Jin Park, Joo Seok Oh
  • Publication number: 20190100916
    Abstract: A multiple support wall structure according to the present invention includes: a pair of top and bottom support plates that has a plurality of rectangular projective islands separated by lattice-shaped projections protruding in the shape of a go board, and protruding upward in the opposite direction to the lattice-shaped projections; and a intermediate reinforcing plate that is disposed between the top and bottom support plates, has upward projective insertions protruding in a shape corresponding to the rectangular islands to be fitted in the rectangular islands of the top support plate, has top grooves formed laterally and longitudinally between the upward projective insertions to fit the lattice-shaped projections, has downward projective insertions formed in the same shape as but in the opposite direction to the upward projective insertions in spaces diagonally adjacent to the upward projective insertions, and has bottom grooves formed laterally and longitudinally between the downward projective insertions
    Type: Application
    Filed: December 4, 2018
    Publication date: April 4, 2019
    Inventors: Chung Gi KIM, Il Jin PARK, Joo Seok OH
  • Patent number: 9567222
    Abstract: Provided area carbon nanotube composite material obtained by treating a mixture including carbon nanotubes, at least one carbon compound other than carbon nanotubes and a dispersion medium under a sub-critical or super-critical condition of 50-400 atm, and a method for producing the same. More particularly, the method for producing a carbon nanotube composite material, includes: introducing a mixture including carbon nanotubes, at least one carbon compound other than carbon nanotubes and a dispersion medium into a preheating unit under a pressure of 1-400 atm to preheat the mixture; treating the preheated mixture under a sub-critical or super-critical condition of 50-400 atm; cooling and depressurizing the resultant product to 0-1000 C and 1-10 atm; and recovering the cooled and depressurized product. Provided also is an apparatus for producing a carbon nanotube composite material in a continuous manner.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: February 14, 2017
    Assignee: Hanwha Chemical Corporation
    Inventors: Man Woo Jung, Seong Yun Jeon, Seong Cheol Hong, Joo Hee Han, Joo Seok Oh, Jin Seo Lee, Seung Hoe Do
  • Publication number: 20120112134
    Abstract: Provided area carbon nanotube composite material obtained by treating a mixture including carbon nanotubes, at least one carbon compound other than carbon nanotubes and a dispersion medium under a sub-critical or super-critical condition of 50-400 atm, and a method for producing the same. More particularly, the method for producing a carbon nanotube composite material, includes: introducing a mixture including carbon nanotubes, at least one carbon compound other than carbon nanotubes and a dispersion medium into a preheating unit under a pressure of 1-400 atm to preheat the mixture; treating the preheated mixture under a sub-critical or super-critical condition of 50-400 atm; cooling and depressurizing the resultant product to 0-1000 C and 1-10 atm; and recovering the cooled and depressurized product. Provided also is an apparatus for producing a carbon nanotube composite material in a continuous manner.
    Type: Application
    Filed: June 30, 2010
    Publication date: May 10, 2012
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Man Woo Jung, Seong Yun Jeon, Seong Cheol Hong, Joo Hee Han, Joo Seok Oh, Jin Seo Lee, Seung Hoe Do
  • Publication number: 20090178826
    Abstract: Disclosed are anisotropic conductive balls for electric connection comprised of conductive balls and insulation resin layers coating the surfaces of those conductive balls, where the conductive balls are coated with a core-shell-structured emulsion-phase or suspension-phase or water-dispersible resin to form insulation resin layers and the functions of the insulation layers are improved as the shells of corpuscles of the insulation resin layers are cross-linked by using a cross-linking agent. Also disclosed are methods of manufacturing such anisotropic conductive balls for electric connection as well as the products using them. Although the anisotropic conductive balls for electric connection of the present invention are single-layered or cross-linked, they show superior alive and insulation characteristics as the problems with the conventional anisotropic conductive balls for electric connection coated with a thermoplastic resin or a thermosetting resin are improved.
    Type: Application
    Filed: February 2, 2006
    Publication date: July 16, 2009
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Joo-Seok Oh, Eui-Deok Kim, Ki-Suk Park, Seoung-Whan Shin
  • Publication number: 20080237545
    Abstract: Disclosed are anisotropic conductive balls for electric connection comprised of conductive balls and insulation resin layers coating the surfaces of those conductive balls. The conductive balls are coated with a core-shell-structured emulsion-phase or suspension-phase or water-dispersible resin to form insulation resin layers as the shells of the insulation resin layers are coated with resin layers having the water-emission ability. Also disclosed are methods of manufacturing anisotropic conductive balls for electric connection as well as the products using them. Although the surfaces of the anisotropic conductive balls are coated with single- or multi-layered insulation resin layers, they show superior alive and insulation characteristics.
    Type: Application
    Filed: February 2, 2006
    Publication date: October 2, 2008
    Applicant: HANWHA CHEMICAL CORPORATION
    Inventors: Eui-Deok Kim, Joo-Seok Oh, Ki-Suk Park, Seoung-Whan Shin
  • Patent number: 7169332
    Abstract: Disclosed is an insulated conductive ball for anisotropic conductive connection, a method of preparing the same and a product using the same. The insulated conductive ball includes a conductive ball, and an insulating resin layer coated on a surface of the conductive ball, in which the insulating resin layer is formed of water-soluble resin beads of core/shell structure. Therefore, the conductive ball of the current invention can exhibit superior current feed and insulation characteristics, compared to those of conventional insulated conductive balls for anisotropic conductive connection coated with thermoplastic resin or thermosetting resin.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: January 30, 2007
    Assignee: Hanwha Chemical Corporation
    Inventors: Joo-Seok Oh, Sang-Hun Lee, Jeong-Deok Seo, Kee-Ho Chang, Jeong-Teck Rim
  • Publication number: 20040222523
    Abstract: Disclosed is an insulated conductive ball for anisotropic conductive connection, a method of preparing the same and a product using the same. The insulated conductive ball includes a conductive ball, and an insulating resin layer coated on a surface of the conductive ball, in which the insulating resin layer is formed of water-soluble resin beads of core/shell structure. Therefore, the conductive ball of the current invention can exhibit superior current feed and insulation characteristics, compared to those of conventional insulated conductive balls for anisotropic conductive connection coated with thermoplastic resin or thermosetting resin.
    Type: Application
    Filed: May 6, 2004
    Publication date: November 11, 2004
    Applicant: Hanwha Chemical Corporation
    Inventors: Joo-Seok Oh, Sang-Hun Lee, Jeong-Deok Seo, Kee-Ho Chang, Jeong-Teck Rim
  • Patent number: D809697
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: February 6, 2018
    Assignee: KUMHO ELECTRIC, INC.
    Inventors: Min Su So, Joo Seok Oh