Patents by Inventor Sang Hun Cheong

Sang Hun Cheong 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).

  • Method for producing spherical aluminum nitride power
    Patent number: 10427939
    Abstract: The present invention provides method for producing a spherical aluminum nitride powder. In an embodiment, the method comprises mixing an Al precursor and a flux in a solvent to produce a mixed solution, spray-drying the mixed solution to form a spray-dried powder, mixing the spray-dried powder and a carbon-based material to form a mixture, heat treating the mixture in a nitrogen atmosphere to form a heat-treated compound, and decarbonizing the heat-treated compound in an air atmosphere, wherein the flux is at least one selected from the group consisting of Cu2O, TiO2, Bi2O3, and CuO, or a mixture of at least one selected from the group consisting of Cu2O, TiO2, Bi2O3, and CuO and at least one selected from the group consisting of CaF2 and Y2O3.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: October 1, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Han Nah Jeong, Donghwan Kim, Shin Hee Jun, Myounghwan Oh, Haejong Jung, Sang Hun Cheong
  • Method for Producing Spherical Aluminum Nitride Powder
    Publication number: 20190202697
    Abstract: The present invention provides method for producing a spherical aluminum nitride powder. In an embodiment, the method comprises mixing an Al precursor and a flux in a solvent to produce a mixed solution, spray-drying the mixed solution to form a spray-dried powder, mixing the spray-dried powder and a carbon-based material to form a mixture, heat treating the mixture in a nitrogen atmosphere to form a heat-treated compound, and decarbonizing the heat-treated compound in an air atmosphere, wherein the flux is at least one selected from the group consisting of Cu2O, TiO2, Bi2O3, and CuO, or a mixture of at least one selected from the group consisting of Cu2O, TiO2, Bi2O3, and CuO and at least one selected from the group consisting of CaF2 and Y2O3.
    Type: Application
    Filed: March 7, 2019
    Publication date: July 4, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Han Nah Jeong, Donghwan Kim, Shin Hee Jun, Myounghwan Oh, Haejong Jung, Sang Hun Cheong