Patents by Inventor Izawa TAKAMASA

Izawa TAKAMASA 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).

  • Fluoride phosphor, method of manufacturing the same, and light emitting device
    Patent number: 10711187
    Abstract: A method of manufacturing a fluoride phosphor represented by a chemical formula A3MF7:Mn4+ includes forming a first mixture by mixing a first raw material containing A2MF6 and a second raw material containing AF or AHF2, forming a second mixture by mixing the first mixture and a sintering aid, and firing the second mixture. In the chemical formula, A is at least one selected from Li, Na, K, Rb, Cs and mixtures thereof, and M is at least one selected from Si, Ti, Zr, Hf, Ge, Sn, and mixtures thereof.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: July 14, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Do Hoon Kim, Izawa Takamasa, Chul Soo Yoon, Sung Woo Choi
  • FLUORIDE PHOSPHOR, METHOD OF MANUFACTURING THE SAME, AND LIGHT EMITTING DEVICE
    Publication number: 20170198218
    Abstract: A method of manufacturing a fluoride phosphor represented by a chemical formula A3MF7:Mn4+ includes forming a first mixture by mixing a first raw material containing A2MF6 and a second raw material containing AF or AHF2, forming a second mixture by mixing the first mixture and a sintering aid, and firing the second mixture. In the chemical formula, A is at least one selected from Li, Na, K, Rb, Cs and mixtures thereof, and M is at least one selected from Si, Ti, Zr, Hf, Ge, Sn, and mixtures thereof.
    Type: Application
    Filed: September 22, 2016
    Publication date: July 13, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Do Hoon KIM, Izawa TAKAMASA, Chul Soo YOON, Sung Woo CHOI