Patents by Inventor Galvin Chia

Galvin Chia 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).

  • Data storage device modifying write operation when a laser mode hop is detected
    Patent number: 9972344
    Abstract: A data storage device is disclosed comprising a first head actuated over a first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface. A write power is applied to the laser and a first write operation is executed to write first data to the first disk surface during a first revolution of the first disk surface. A first transient decrease in an output power of the laser is detected during the first write operation, and when the first transient decrease in the output power of the laser is detected during the first write operation, a write-verify of the first data is executed during a second revolution of the first disk surface.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: May 15, 2018
    Assignee: Western Digital Technologies, Inc.
    Inventors: Huanxiang Ruan, Galvin Chia, Prakash Balasubramaniam, Phillip S. Haralson, Dennis W. Hogg
  • DATA STORAGE DEVICE MODIFYING WRITE OPERATION WHEN A LASER MODE HOP IS DETECTED
    Publication number: 20170323657
    Abstract: A data storage device is disclosed comprising a first head actuated over a first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface. A write power is applied to the laser and a first write operation is executed to write first data to the first disk surface during a first revolution of the first disk surface. A first transient decrease in an output power of the laser is detected during the first write operation, and when the first transient decrease in the output power of the laser is detected during the first write operation, a write-verify of the first data is executed during a second revolution of the first disk surface.
    Type: Application
    Filed: July 24, 2017
    Publication date: November 9, 2017
    Inventors: HUANXIANG RUAN, GALVIN CHIA, PRAKASH BALASUBRAMANIAM, PHILLIP S. HARALSON, DENNIS W. HOGG
  • Data storage device modifying write operation when a laser mode hop is detected
    Patent number: 9747928
    Abstract: A data storage device is disclosed comprising a first head actuated over a first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface. A write power is applied to the laser when executing a first write operation, and the first write operation is paused when a transient increase in the output power of the laser is detected. In another embodiment, a write-verify of the written data is executed when a transient decrease in the output power of the laser is detected.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: August 29, 2017
    Assignee: Western Digital Technologies, Inc.
    Inventors: Huanxiang Ruan, Galvin Chia, Prakash Balasubramaniam, Phillip S. Haralson, Dennis W. Hogg