Patents by Inventor Huyen D. Do

Huyen D. Do 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).

  • Apparatus and method for glide height calibration of disk surfaces by use of dual-zone laser texture
    Patent number: 6662623
    Abstract: A disk for calibrating glide heads utilizes a dual-zone configuration of multiple laser melt bumps having selected heights. Averaging the PZT response over many bumps significantly narrows the response distribution, resulting in greater certainty and correlation of the PZT amplitude to bump height. The multiple calibration bumps are circumferentially arranged on a disk surface at a selected radius in a ring-like manner. A second head cleaning zone is provided near the inner diameter of the disk to provide for increased reproducibility of the PZT calibration response. The second zone is densely textured and serves to clean the glide head prior to its use in the calibration zone.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: December 16, 2003
    Assignee: International Business Machines Corporation
    Inventors: Bradley Frederick Baumgartner, James Hammond Brannon, Jorge Daniel Colonia, Huyen D. Do, Shanlin Duan, Connie H. Moy, Hang Fai Ngo, Yu Lo
  • Apparatus and method for glide height calibration of disk surfaces by use of dual-zone laser texture
    Publication number: 20030051529
    Abstract: A disk for calibrating glide heads utilizes a dual-zone configuration of multiple laser melt bumps having selected heights. Averaging the PZT response over many bumps significantly narrows the response distribution, resulting in greater certainty and correlation of the PZT amplitude to bump height. The multiple calibration bumps are circumferentially arranged on a disk surface at a selected radius in a ring-like manner. A second head cleaning zone is provided near the inner diameter of the disk to provide for increased reproducibility of the PZT calibration response. The second zone is densely textured and serves to clean the glide head prior to its use in the calibration zone.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 20, 2003
    Applicant: International Business Machines Corp.
    Inventors: Bradley Frederick Baumgartner, James Hammond Brannon, Jorge Daniel Colonia, Huyen D. Do, Shanlin Duan, Connie H. Moy, Hang Fai Ngo, Yu Lo