Patents by Inventor Kirk B. Cheng

Kirk B. Cheng 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).

  • Tuned edge profile of a disk substrate for use in magnetic recording media
    Patent number: 11664050
    Abstract: A disk for a magnetic recording apparatus is described. The disk includes a first surface extending along a first plane, a second surface extending along a second plane parallel to the first plane, and a disk thickness between the first surface and the second surface, measured along a first direction substantially normal to the first surface. The disk further includes an edge surface disposed along a perimeter of the disk and between the first surface and the second surface, where the edge surface extends along a third plane substantially perpendicular to the first surface, a first chamfer disposed between the first surface and the edge surface, and a second chamfer disposed between the second surface and the edge surface. In an aspect, a length of the edge surface measured along the first direction may be between 40% and 80% of the disk thickness.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: May 30, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Shoji Suzuki, Kirk B. Cheng
  • TUNED EDGE PROFILE OF A DISK SUBSTRATE FOR USE IN MAGNETIC RECORDING MEDIA
    Publication number: 20230104944
    Abstract: A disk for a magnetic recording apparatus is described. The disk includes a first surface extending along a first plane, a second surface extending along a second plane parallel to the first plane, and a disk thickness between the first surface and the second surface, measured along a first direction substantially normal to the first surface. The disk further includes an edge surface disposed along a perimeter of the disk and between the first surface and the second surface, where the edge surface extends along a third plane substantially perpendicular to the first surface, a first chamfer disposed between the first surface and the edge surface, and a second chamfer disposed between the second surface and the edge surface. In an aspect, a length of the edge surface measured along the first direction may be between 40% and 80% of the disk thickness.
    Type: Application
    Filed: December 6, 2021
    Publication date: April 6, 2023
    Inventors: Shoji Suzuki, Kirk B. Cheng