Patents by Inventor Yuki KAWAMATA

Yuki KAWAMATA 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).

  • FLUX AND SOLDER PASTE
    Publication number: 20230113712
    Abstract: A flux containing an organic acid, a water-soluble base agent, and a solvent, but not containing water is adopted. In this flux, the organic acid includes 1,2,3-propanetricarboxylic acid. The water-soluble base agent is one or more selected from the group consisting of a nonionic surfactant and a weak cationic surfactant. The content of the 1,2,3-propanetricarboxylic acid is 1% by mass or more and 15% by mass or less with respect to the total amount of the entire flux, the total content of the water-soluble base agent is 30% by mass or more and 65% by mass or less with respect to the total amount of the entire flux, and the total content of the solvent is 30% by mass or more and 65% by mass or less with respect to the total amount of the entire flux. According to this flux, the wettability of solder can be enhanced and ball missing after reflow and flux residue washing is suppressed.
    Type: Application
    Filed: February 17, 2021
    Publication date: April 13, 2023
    Inventors: Hiroyoshi KAWASAKI, Masato SHIRATORI, Kazuhiro MINEGISHI, Yuki KAWAMATA
  • Diamond crystal substrate, method for producing diamond crystal substrate, and method for homo-epitaxially growing diamond crystal
    Patent number: 11505878
    Abstract: A diamond crystal substrate has a substrate surface that is one crystal plane among (100), (111), and (110) and that has atomic steps and terraces structure at an off-angle of 7° or less excluding 0°.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: November 22, 2022
    Assignee: Adamant Namiki Precision Jewel Co., Ltd.
    Inventors: Koji Koyama, Seongwoo Kim, Yuki Kawamata, Naoki Fujita
  • DIAMOND CRYSTAL SUBSTRATE, METHOD FOR PRODUCING DIAMOND CRYSTAL SUBSTRATE, AND METHOD FOR HOMO-EPITAXIALLY GROWING DIAMOND CRYSTAL
    Publication number: 20210062362
    Abstract: A diamond crystal substrate has a substrate surface that is one crystal plane among (100), (111), and (110) and that has atomic steps and terraces structure at an off-angle of 7° or less excluding 0°.
    Type: Application
    Filed: November 12, 2020
    Publication date: March 4, 2021
    Applicant: Adamant Namiki Precision Jewel Co., Ltd.
    Inventors: Koji KOYAMA, Seongwoo KIM, Yuki KAWAMATA, Naoki FUJITA