Patents by Inventor Jin Seong Choi

Jin Seong Choi 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: 12206116
    Abstract: Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: January 21, 2025
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Korea Advanced Institute of Science and Technology
    Inventors: Ji Hoon Yang, Jin Seong Choi, Kook Il Han, Geon Hee Cho, Jin Woo Lee, Ah Ryeon Lee
  • Publication number: 20250015307
    Abstract: A lens-shaped porous support for fuel cell catalysts may improve electrochemical performance and increase mass transfer capability when the porous support is used as a carrier to support a fuel cell catalyst.
    Type: Application
    Filed: December 6, 2023
    Publication date: January 9, 2025
    Inventors: Ji Hoon Yang, Jin Seong Choi, Kook Il Han, Geon Hee Cho, Jin Woo Lee, Ah Ryeon Lee, Dong Yoon Woo
  • Publication number: 20240363473
    Abstract: The present invention is directed to semiconductor devices and integrated circuit packaging. In a specific embodiment, a semiconductor device with a heat spreader structure is provided. The heat spreader is configured to couple to a second layer to establish an effective thermal dissipation path for heat generated from a hot spot of a circuit. The second layer comprises a first portion and a second portion. The first portion is coupled to the hot spot. The heat spreader comprises a third portion and a fourth portion. The third portion comprises a protrusion coupled to the first portion via a first side surface. There are other embodiments as well.
    Type: Application
    Filed: April 28, 2023
    Publication date: October 31, 2024
    Inventors: Hyunsuk Chun, Reza Sharifi, Kian Yeow Gan, Nicole A. Butel, Jin Seong Choi
  • Publication number: 20240203898
    Abstract: An EM shielding structure for a semiconductor package is embedded in a through hole of a core layer of the semiconductor package. The EM shielding structure may include multiple vias formed by a copper plating operation. Additionally, a metal way surrounds the EM shielding structures and prevents, along with a dielectric material, unwanted EM radiation (passing through the vias) from emanating throughout the semiconductor package. The EM shielding structure can also take the form of an insert that is adhered to the core layer at a through hole of the core layer.
    Type: Application
    Filed: December 19, 2022
    Publication date: June 20, 2024
    Applicant: Avago Technologies International Sales Pte. Limited
    Inventors: Jin Seong CHOI, Hyunsuk Chun, Sampath Karikalan, Kwok Cheung Tsang, Wen Hsien Huang, Hsi-Wei Wang, Chia Yuan Yu
  • Publication number: 20230201862
    Abstract: Provided is a slot die coating device, and more specifically, a slot die coating device in which negative pressure generation is applied into a slot die and a method of using the same. The slot die coating device includes a first main body including a first surface, a second main body including a second surface corresponding to the first surface, and located to be spaced apart from the first surface by a regular interval, a main body unit including a head lip that is a space between the first surface and the second surface, and a negative pressure generation unit installed on at least one of the first main body and the second main body.
    Type: Application
    Filed: November 19, 2022
    Publication date: June 29, 2023
    Inventors: Shin Jang, Jun Tae Kim, Ji Young Kim, Jin Seong Choi, Hyo Jong Kim
  • Patent number: 11581548
    Abstract: Disclosed herein is a method of manufacturing a support for a catalyst of a fuel cell. The method may include preparing an admixture including a carbon material and a cerium precursor into a reactor, providing the admixture in a reactor, raising a temperature of the reactor to a predetermined temperature, and introducing water vapor into the reactor to perform an activation reaction of the carbon material.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: February 14, 2023
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Geon Hee Cho, Ji Hoon Yang, Kook Il Han, Jin Seong Choi
  • Publication number: 20220200013
    Abstract: The present invention provides a method for manufacturing a catalyst for a fuel cell which may not be poisoned by an ionomer. Specifically, the method includes: loading a catalyst on a support, coating a carbon layer having a predetermined thickness on the surface of the support, and exposing the catalyst to the outside by removing at least a part of the carbon layer.
    Type: Application
    Filed: October 20, 2021
    Publication date: June 23, 2022
    Inventors: Dong Hwan Yoon, Seong Min Yuk, Hoon Hui Lee, Jin Seong Choi
  • Publication number: 20220181644
    Abstract: Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.
    Type: Application
    Filed: March 30, 2021
    Publication date: June 9, 2022
    Inventors: Ji Hoon Yang, Jin Seong Choi, Kook Il Han, Geon Hee Cho, Jin Woo Lee, Ah Ryeon Lee
  • Publication number: 20220166032
    Abstract: Disclosed herein is a method of manufacturing a support for a catalyst of a fuel cell. The method may include preparing an admixture including a carbon material and a cerium precursor into a reactor, providing the admixture in a reactor, raising a temperature of the reactor to a predetermined temperature, and introducing water vapor into the reactor to perform an activation reaction of the carbon material.
    Type: Application
    Filed: September 28, 2021
    Publication date: May 26, 2022
    Inventors: Geon Hee Cho, Ji Hoon Yang, Kook Il Han, Jin Seong Choi
  • Patent number: 10910660
    Abstract: Disclosed is a method of manufacturing a membrane-electrode assembly for fuel cells. The method includes (a) admixing a metal catalyst, an ionomer and a first dispersion solvent to prepare a first admixture, (b) heat treating the first admixture prepared in (a) to form an ionomer-fixed metal catalyst, and (c) immersing the ionomer-fixed metal catalyst formed in (b) in a solvent, wherein the solvent in (c) may include one or more selected from the group consisting of ethanol, propanol, and isopropyl alcohol. The membrane-electrode assembly for fuel cells manufactured by the method may have substantially improved durability.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: February 2, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dae Yong Son, Yoon Hwan Cho, Jin Seong Choi, Yong Min Kim
  • Patent number: 10511029
    Abstract: A method for manufacturing a catalyst support includes: heat-treating a crystalline carbon support in a temperature range from 700° C. to 1100° C. under a vapor atmosphere to increase a specific surface area of the carbon support; and applying a magnetic field to the increased specific surface area of the carbon support to remove an impurity.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: December 17, 2019
    Assignees: HYUNDAI MOTOR COMPANY, VINATECH CO., LTD.
    Inventors: Jin Seong Choi, Bum Wook Roh, Seung Ho Yu, Jin Su Hyun, Han Gi Jeong
  • Patent number: 10439230
    Abstract: A method for manufacturing an electrode for a fuel cell includes a mixing step of producing a first mixed solution by mixing a carbon support, a metal catalyst, a binder and a first dispersion solvent, a drying step of producing a first mixed solution dried body by drying the first mixed solution, a heat treatment step of heating the first mixed solution dried body, a second mixed solution production step of producing a second mixed solution by dissolving the heat-treated first mixed solution dried body in a second dispersion solvent, and a release paper coating step of producing an electrode by coating the second mixed solution onto a release paper, and then drying the second mixed solution.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: October 8, 2019
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Dae-Yong Son, Yoon-Hwan Cho, Jin Seong Choi, Young-Taek Kim
  • Publication number: 20190207238
    Abstract: Disclosed is a method of manufacturing a membrane-electrode assembly for fuel cells. The method includes (a) admixing a metal catalyst, an ionomer and a first dispersion solvent to prepare a first admixture, (b) heat treating the first admixture prepared in (a) to form an ionomer-fixed metal catalyst, and (c) immersing the ionomer-fixed metal catalyst formed in (b) in a solvent, wherein the solvent in (c) may include one or more selected from the group consisting of ethanol, propanol, and isopropyl alcohol. The membrane-electrode assembly for fuel cells manufactured by the method may have substantially improved durability.
    Type: Application
    Filed: September 13, 2018
    Publication date: July 4, 2019
    Inventors: Dae Yong Son, Yoon Hwan Cho, Jin Seong Choi, Yong Min Kim
  • Patent number: 10128037
    Abstract: Inductors are fabricated in core layers according to a predefined semiconductor package manufacturing process rules. The inductors provide an embedded substrate trace inductor solution. The inductors may be part of an on-chip voltage regulator or any other circuit design. The inductors provide a core spiral structure to help increase inductance, particularly using magnetic field coupling between inductors. The core layers provide thicker and heavier conductive segments for the inductors, particularly as compared to inductors fabricated in build-up layers according to the semiconductor package manufacturing process rules.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: November 13, 2018
    Assignee: Avago Technologies International Sales Pte. Limited
    Inventors: Namhoon Kim, Sampath Komarapalayam Karikalan, Zhihui Wang, Jin Seong Choi, Boon Leong Tan, Edward Law
  • Publication number: 20180062182
    Abstract: A method for manufacturing a catalyst support includes heat-treating a crystalline carbon support in a temperature range from 700° C. to 1100° C. under a vapor atmosphere to increase a specific surface area of the carbon support; and applying a magnetic field to the increased specific surface area of the carbon support to remove an impurity.
    Type: Application
    Filed: December 1, 2016
    Publication date: March 1, 2018
    Inventors: Jin Seong CHOI, Bum Wook ROH, Seung Ho YU, Jin Su HYUN, Han Gi JEONG
  • Publication number: 20180026274
    Abstract: A method for manufacturing an electrode for a fuel cell includes a mixing step of producing a first mixed solution by mixing a carbon support, a metal catalyst, a binder and a first dispersion solvent, a drying step of producing a first mixed solution dried body by drying the first mixed solution, a heat treatment step of heating the first mixed solution dried body, a second mixed solution production step of producing a second mixed solution by dissolving the heat-treated first mixed solution dried body in a second dispersion solvent, and a release paper coating step of producing an electrode by coating the second mixed solution onto a release paper, and then drying the second mixed solution.
    Type: Application
    Filed: July 17, 2017
    Publication date: January 25, 2018
    Inventors: Dae-Yong SON, Yoon-Hwan CHO, Jin Seong CHOI, Young-Taek KIM
  • Publication number: 20170294659
    Abstract: A release liner used for manufacturing a membrane electrode assembly includes one or more first films formed of a material having a releasing property, and a second film bonded to the first films and having a tensile strength higher than a tensile strength of the first film. The first films are formed of polytetrafluoroethylene (PTFE) having a non-bonding property and the releasing property.
    Type: Application
    Filed: April 4, 2017
    Publication date: October 12, 2017
    Inventors: Yong Min KIM, Jin Seong CHOI, Yoon Hwan CHO, Dae Yong SON, Jae Seung LEE, Young Taek KIM, Su Won SEOL
  • Patent number: 9608277
    Abstract: A method for manufacturing an alloy catalyst for a fuel cell is disclosed. The method for manufacturing an alloy catalyst for a fuel cell may include predetermined processes and reaction conditions, such that iridium is alloyed to platinum contained in a cathode carbon support catalyst. Accordingly, time for stabilizing charge on the carbon surface may be reduced and a metal particle size may be controlled, thereby manufacturing high quality products having uniform metal particle distribution and improved durability. In addition, corrosion of a cathode carbon support catalyst in a harsh condition such as vehicle driving may be prevented.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: March 28, 2017
    Assignee: Hyundai Motor Company
    Inventors: Mi Hye Yi, Jin Seong Choi, Bum Wook Roh
  • Publication number: 20160300661
    Abstract: Inductors are fabricated in core layers according to a predefined semiconductor package manufacturing process rules. The inductors provide an embedded substrate trace inductor solution. The inductors may be part of an on-chip voltage regulator or any other circuit design. The inductors provide a core spiral structure to help increase inductance, particularly using magnetic field coupling between inductors. The core layers provide thicker and heavier conductive segments for the inductors, particularly as compared to inductors fabricated in build-up layers according to the semiconductor package manufacturing process rules.
    Type: Application
    Filed: June 29, 2015
    Publication date: October 13, 2016
    Inventors: Namhoon Kim, Sampath Komarapalayam Karikalan, Zhihui Wang, Jin Seong Choi, Boon Leong Tan, Edward Law
  • Patent number: 9401513
    Abstract: Titanium suboxide (TixO2x-1) nanoparticles useful as a support for a catalyst electrode of a fuel cell, and a method for synthesizing the titanium suboxide (TixO2x-1) nanoparticles by using TiO2, a Co catalyst and hydrogen gas at a low temperature ranging from 600 to 900° C. are described Since the titanium suboxide nanoparticles show high corrosion resistance to acid and durability and have excellent thermal and electric conductivities, a catalyst electrode manufactured by using the same as a support exhibits improved catalytic activity and oxidation reduction (redox) properties.
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: July 26, 2016
    Assignees: HYUNDAI MOTOR COMPANY, SONGSIL UNIVERSITY RESEARCH CONSORTIUM TECHNO-PARK
    Inventors: Bum Wook Roh, Jin Seong Choi, Mi Hye Yi, In Chul Hwang, Young Woo Lee, Sang Beom Han, Kyung Won Park