Patents by Inventor Hyun Jai LIM

Hyun Jai LIM 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: 20200361776
    Abstract: The present invention provides a method for preparing a high-performance graphite sheet by imidizing a polyamic acid resulting from a reaction of dianhydride monomer(s) and diamine monomer(s) to obtain a polyimide film; and carbonizing and/or graphitizing the polyimide film to obtain a high-performance graphite sheet, where the polyimide film contains 2 or more fillers having different average particle diameters, and the thermal conductivity of the graphite sheet is at least 1,400 W/m·K. Further, the present invention provides a graphite sheet obtained by the above method.
    Type: Application
    Filed: July 30, 2020
    Publication date: November 19, 2020
    Inventors: Dong Young WON, Hyun Jai LIM, Kyung Su KIM
  • Publication number: 20200291180
    Abstract: The present invention provides a polyimide film for a roll type graphite sheet prepared by imidizing a polyamic acid formed by a reaction of a dianhydride monomer and a diamine monomer, where the polyimide film has a modulus of 2.7 GPa or more.
    Type: Application
    Filed: December 29, 2017
    Publication date: September 17, 2020
    Applicant: SKCKOLONPI INC
    Inventors: Dong Young WON, Hyun Jai LIM, Kyung Su KIM
  • Patent number: 10766773
    Abstract: The present invention provides a method for preparing a high-performance graphite sheet by imidizing a polyamic acid resulting from a reaction of dianhydride monomer(s) and diamine monomer(s) to obtain a polyimide film; and carbonizing and/or graphitizing the polyimide film to obtain a high-performance graphite sheet, where the polyimide film contains 2 or more fillers having different average particle diameters, and the thermal conductivity of the graphite sheet is at least 1,400 W/m·K. Further, the present invention provides a graphite sheet obtained by the above method.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: September 8, 2020
    Assignee: PI Advanced Materials Co., Ltd.
    Inventors: Dong Young Won, Hyun Jai Lim, Kyung Su Kim
  • Patent number: 10519312
    Abstract: The present invention relates to an ultra-thin black polyimide film and a method for preparing the same. The ultra-thin black polyimide film according to the present invention has a thickness of 8 ?m or less, and has not only an excellent gloss and a low light transmittance in the range of visible light, but also an excellent dimensional stability so as to be effectively used in products such as slim devices, coverlays, insulating films, or semiconductor devices, which need to have a good mechanical or thermal properties.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 31, 2019
    Assignee: SKC KOLON PI Inc.
    Inventors: Kil Nam Lee, Jae Chul Ahn, In Seok Oh, Sang Hak Lee, Jae Baek Lee, Hyun Jai Lim
  • Publication number: 20190144286
    Abstract: The present invention provides a method for preparing a high-performance graphite sheet by imidizing a polyamic acid resulting from a reaction of dianhydride monomer(s) and diamine monomer(s) to obtain a polyimide film; and carbonizing and/or graphitizing the polyimide film to obtain a high-performance graphite sheet, where the polyimide film contains 2 or more fillers having different average particle diameters, and the thermal conductivity of the graphite sheet is at least 1,400 W/m·K. Further, the present invention provides a graphite sheet obtained by the above method.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 16, 2019
    Inventors: Dong Young WON, Hyun Jai LIM, Kyung Su KIM
  • Publication number: 20180346720
    Abstract: The present invention relates to an ultra-thin black polyimide film and a method for preparing the same. The ultra-thin black polyimide film according to the present invention has a thickness of 8 ?m or less, and has not only an excellent gloss and a low light transmittance in the range of visible light, but also an excellent dimensional stability so as to be effectively used in products such as slim devices, coverlays, insulating films, or semiconductor devices, which need to have a good mechanical or thermal properties.
    Type: Application
    Filed: September 29, 2017
    Publication date: December 6, 2018
    Applicant: SKC KOLON PI Inc.
    Inventors: Kil Nam LEE, Jae Chul AHN, In Seok OH, Sang Hak LEE, Jae Baek LEE, Hyun Jai LIM