Patents by Inventor Nobuhiro Okuda

Nobuhiro Okuda 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: 20210134513
    Abstract: A magnetic core having a high relative permeability is obtained. The magnetic core contains soft magnetic metal powder particles. In a cross section of the magnetic core, a number ratio of soft magnetic metal powder particles having a circularity of less than 0.50 to a total number of soft magnetic metal powder particles having a particle size of 10 ?m or more and less than 50 ?m is 0.05% or more and 1.50% or less.
    Type: Application
    Filed: October 28, 2020
    Publication date: May 6, 2021
    Applicant: TDK CORPORATION
    Inventors: Nobuhiro OKUDA, Hiroyuki MATSUMOTO, Kazuhiro YOSHIDOME
  • Publication number: 20200303105
    Abstract: The present invention relates to a magnetic core containing soft magnetic powder and a coil component using the magnetic core. The soft magnetic powder has particles each having at least one pore therein, and the number of pores present in a region of 2.5 mm square in a cross section of the magnetic core is 60×(?/80) or more and 10000×(?/80) or less, in which the volume packing density of the soft magnetic powder in the magnetic core is ?%.
    Type: Application
    Filed: March 19, 2020
    Publication date: September 24, 2020
    Applicant: TDK CORPORATION
    Inventors: Nobuhiro OKUDA, Hiroyuki MATSUMOTO, Kazuhiro YOSHIDOME
  • Patent number: 10026531
    Abstract: The present invention provides R-T-B based alloy powders, wherein R represents at least one rare earth element, and T represents at least one element selected from the group consisting of ferrum and cobalt. The R-T-B based alloy powders have main phase grains, grain boundary phases and additive phases. The main phase grains are composed of R2T14B and have an average grain size of 200 nm or more and 500 nm or less. The grain boundary phases are richer in R than the main phase grains. With respect to any cross section of the R-T-B based alloy powders, the coverage of the main phase grains defined by equation 1 with the grain boundary phases with a roundness defined by equation 2 being 0.1 or more and 0.6 or less, is 10% or more and 40% or less.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: July 17, 2018
    Assignee: TDK CORPORATION
    Inventor: Nobuhiro Okuda
  • Publication number: 20140341774
    Abstract: The present invention provides R-T-B based alloy powders, wherein R represents at least one rare earth element, and T represents at least one element selected from the group consisting of ferrum and cobalt. The R-T-B based alloy powders have main phase grains, grain boundary phases and additive phases. The main phase grains are composed of R2T14B and have an average grain size of 200 nm or more and 500 nm or less. The grain boundary phases are richer in R than the main phase grains. With respect to any cross section of the R-T-B based alloy powders, the coverage of the main phase grains defined by equation 1 with the grain boundary phases with a roundness defined by equation 2 being 0.1 or more and 0.6 or less, is 10% or more and 40% or less.
    Type: Application
    Filed: October 11, 2012
    Publication date: November 20, 2014
    Applicant: TDK CORPORATION
    Inventor: Nobuhiro Okuda
  • Patent number: 4670293
    Abstract: A method of making a semiconductor film on a substrate having a non-flat surface, by placing the substrate in a reaction chamber including at least a pair of discharge electrodes, an inlet of a reaction gas for producing a desired semiconductor film, and an outlet for reduced pressure, and performing a discharge in the presence of said reacrion gas for producing said semiconductor film, while arranging said non-flat surface of said substrate outside a plasma region formed between said discharge electrodes and further locating said non-flat surface substantially in a vertical direction with respect to electrode surfaces of said discharge electrodes, thereby semiconductor film being directly and uniformly deposited on said non-flat surface of said substrate, which is of worth in the production of, e.g., roofing tile-shaped photovoltaic devices.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: June 2, 1987
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masaru Yamano, Yukinori Kuwano, Shoichi Nakano, Tsugufumi Matsuoka, Souichi Sakai, Hirosato Yagi, Nobuhiro Okuda