Patents by Inventor Masayuki KAKEHATA

Masayuki KAKEHATA 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).

  • Surface structure forming method for zirconia-based ceramics, and zirconia-based ceramics
    Patent number: 10774003
    Abstract: Provided herein is a method for forming a periodic microstructure on a surface of zirconia-based ceramics, which are not easily mechanically workable, without causing thermal adverse effects. A zirconia-based ceramic having a surface periodic microstructure is also provided. A linearly or circularly polarized laser beam is irradiated to a zirconia-based ceramic surface, and periodic irregularities are formed in a spot of the laser beam. Stripe-pattern irregularities parallel to the direction of polarization can be formed in a spot of a laser beam by irradiating a linearly polarized ultrashort pulsed-laser beam to a zirconia-based ceramic surface. A mesh-like raised region and a dot-like recessed region can be periodically formed by irradiating a circularly polarized ultrashort pulsed-laser beam to a ceramic surface.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: September 15, 2020
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Masayuki Kakehata, Hidehiko Yashiro, Isao Matsushima
  • SURFACE STRUCTURE FORMING METHOD FOR ZIRCONIA-BASED CERAMICS, AND ZIRCONIA-BASED CERAMICS
    Publication number: 20170260100
    Abstract: Provided herein is a method for forming a periodic microstructure on a surface of zirconia-based ceramics, which are not easily mechanically workable, without causing thermal adverse effects. A zirconia-based ceramic having a surface periodic microstructure is also provided. A linearly or circularly polarized laser beam is irradiated to a zirconia-based ceramic surface, and periodic irregularities are formed in a spot of the laser beam. Stripe-pattern irregularities parallel to the direction of polarization can be formed in a spot of a laser beam by irradiating a linearly polarized ultrashort pulsed-laser beam to a zirconia-based ceramic surface. A mesh-like raised region and a dot-like recessed region can be periodically formed by irradiating a circularly polarized ultrashort pulsed-laser beam to a ceramic surface.
    Type: Application
    Filed: September 10, 2015
    Publication date: September 14, 2017
    Applicant: National Institute of Advanced Industrial Science and Technology
    Inventors: Masayuki KAKEHATA, Hidehiko YASHIRO, Isao MATSUSHIMA