Patents by Inventor Ji-Seok Hwang

Ji-Seok Hwang 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: 20240088059
    Abstract: An electronic device structure having a shielding structure includes a substrate with an electronic component electrically connected to the substrate. The shielding structure includes conductive spaced-apart pillar structures that have proximate ends connected to the substrate and distal ends spaced apart from the substrate, and that are laterally spaced apart from the first electronic component. In one embodiment, the conductive pillar structures are conductive wires attached at one end to the substrate with an opposing end extending away from the substrate so that the conductive wires are provided generally perpendicular to the substrate. A package body encapsulates the electronic component and the conductive spaced-apart pillar structures. In one embodiment, the shielding structure further includes a shielding layer disposed adjacent to the package body, which is electrically connected to the conductive spaced-apart pillar structures.
    Type: Application
    Filed: November 17, 2023
    Publication date: March 14, 2024
    Applicant: Amkor Technology Singapore Holding Pte. Ltd.
    Inventors: Young Woo LEE, Jae Ung LEE, Byong Jin KIM, EunNaRa CHO, Ji Hoon OH, Young Seok KIM, Jin Young KHIM, Tae Kyeong HWANG, Jin Seong KIM, Gi Jung KIM
  • Patent number: 11411226
    Abstract: Disclosed are an electrode for fuel cells, a membrane electrode assembly for fuel cells including the same and a method for manufacturing the same in which the electrode is manufactured by forming an ionomer layer between an electrode layer and a catalyst layer and an antioxidant is dispersed into the catalyst layer of the electrode and an ion exchange layer of an electrolyte membrane so as to improve interfacial bonding force between the electrode and the electrolyte membrane, the electrode is bonded to the electrolyte membrane using a transfer process, and durability of the electrode and the electrolyte membrane is improved.
    Type: Grant
    Filed: October 23, 2020
    Date of Patent: August 9, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Hee Jin Woo, Jun Woo Kim, Jun Tae Kim, Ji Seok Hwang
  • Publication number: 20210151777
    Abstract: Disclosed are an electrode for fuel cells, a membrane electrode assembly for fuel cells including the same and a method for manufacturing the same in which the electrode is manufactured by forming an ionomer layer between an electrode layer and a catalyst layer and an antioxidant is dispersed into the catalyst layer of the electrode and an ion exchange layer of an electrolyte membrane so as to improve interfacial bonding force between the electrode and the electrolyte membrane, the electrode is bonded to the electrolyte membrane using a transfer process, and durability of the electrode and the electrolyte membrane is improved.
    Type: Application
    Filed: October 23, 2020
    Publication date: May 20, 2021
    Inventors: Hee Jin Woo, Jun Woo Kim, Jun Tae Kim, Ji Seok Hwang
  • Publication number: 20140186523
    Abstract: Disclosed herein is a slot die coating apparatus and method for manufacturing a membrane electrode assembly. The apparatus is configured to discharge a mixture of a plurality of different types of catalytic slurries, to coat portions of an electrode with the different types of catalytic slurries. The apparatus includes a slot die coater head that is configured to receive different types of catalytic slurries and discharge a mixture of the catalytic slurries. In addition, the apparatus includes a catalytic slurry module that is configured to supply the different types of catalytic slurries to the slot die coater head.
    Type: Application
    Filed: April 10, 2013
    Publication date: July 3, 2014
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Jae Seung Lee, Yong Min Kim, Ji Seok Hwang
  • Publication number: 20120148935
    Abstract: The present invention provides a method of fabricating a membrane-electrode assembly for a polymer electrolyte membrane fuel cell, and a membrane-electrode assembly and a polymer electrolyte membrane fuel cell formed thereby. In the method, a 3-layered membrane-electrode assembly is formed in which a catalyst electrode layer is disposed on both surfaces of a polymer electrolyte membrane. A sub-gasket having an opening therein and having a primer layer formed on one surface thereof is formed, and is attached on both surfaces of the 3-layered membrane-electrode assembly such that the surface of the sub-gasket having the primer layer formed thereon faces the outside (is exposed) and the catalyst electrode layer is exposed through the opening.
    Type: Application
    Filed: June 3, 2011
    Publication date: June 14, 2012
    Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANY
    Inventors: Hoon Hui Lee, Nak Hyun Kwon, Ji Seok Hwang
  • Publication number: 20090081526
    Abstract: An electrode for a fuel cell and a fuel cell system including the electrode. The electrode includes an electrode substrate including carbon fiber and a hydrophobic polymer fiber, and a catalyst layer on the electrode substrate. As such, the electrode uniformly includes the hydrophobic polymer fiber thereon, and therefore can uniformly release and maintain water generated during operation of the fuel cell, thereby improving fuel cell characteristics.
    Type: Application
    Filed: July 16, 2008
    Publication date: March 26, 2009
    Inventors: Ji-Seok Hwang, Min-Kyu Song, You-Mee Kim, Hyoung-Seok Song, Hyun-Seok Cho
  • Publication number: 20090075133
    Abstract: Provided are an electrode and a membrane-electrode assembly for a fuel cell, and a fuel cell system including the same. The electrode for a fuel cell may include an electrode substrate and a catalyst layer disposed on one side of the electrode substrate. The electrode substrate may include a non-woven fabric or a woven fabric coated with an electrically conductive polymer. The electrode for a fuel cell may be configured for high-performance by promoting transfer of electrons, reactants and products.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Min-Kyu Song, Ji-Seok Hwang, In-Seob Song