Patents by Inventor Ayaka Takimoto

Ayaka Takimoto 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).

  • Hard disk substrate and hard disk device including the hard disk substrate
    Patent number: 11205453
    Abstract: Provided are a thin hard disk substrate that is scratch-resistant on the disk surface and wobbles less during rotation and a hard disk device including such a hard disk substrate. The hard disk substrate 1 includes an aluminum alloy substrate 2 having NiP plating films 3 on the surfaces. The aluminum alloy substrate 2 has the Vickers hardness of 60 Hv or more, the ratio between the thickness of the NiP plating films 3 and the thickness of the Al alloy substrate 2 is 3.8% or more, the Young's modulus of the hard disk substrate 1 is 74.6 GPa or more, and the Vickers hardness of the hard disk substrate 1 is 293 Hv or more.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: December 21, 2021
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Ayaka Takimoto, Nobuaki Mukai
  • HARD DISK SUBSTRATE AND HARD DISK DEVICE INCLUDING THE HARD DISK SUBSTRATE
    Publication number: 20190333535
    Abstract: Provided are a thin hard disk substrate that is scratch-resistant on the disk surface and wobbles less during rotation and a hard disk device including such a hard disk substrate. The hard disk substrate 1 includes an aluminum alloy substrate 2 having NiP plating films 3 on the surfaces. The aluminum alloy substrate 2 has the Vickers hardness of 60 Hv or more, the ratio between the thickness of the NiP plating films 3 and the thickness of the Al alloy substrate 2 is 3.8% or more, the Young's modulus of the hard disk substrate 1 is 74.6 GPa or more, and the Vickers hardness of the hard disk substrate 1 is 293 Hv or more.
    Type: Application
    Filed: December 28, 2017
    Publication date: October 31, 2019
    Applicant: Toyo Kohan Co., Ltd.
    Inventors: Ayaka Takimoto, Nobuaki Mukai