Patents by Inventor Hai Chi Nguy

Hai Chi Nguy 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).

  • Demagnetization of magnetic media for data storage device using gradually reduced magnetic field
    Patent number: 7079345
    Abstract: Demagnetizing magnetic media for recording data in a data storage device includes placing the magnetic media in a magnetic field at a first strength, and gradually reducing the magnetic field to a second strength to essentially eliminate net magnetization in the magnetic media.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: July 18, 2006
    Assignee: Maxtor Corporation
    Inventors: Hai Chi Nguy, Steven Lambert, Steven Marshall, George H. Bellesis
  • Magnetic shield for the drive housing of a recording drive
    Patent number: 7068465
    Abstract: A drive housing (22) for shielding a storage disk (13) and a data transducer (48) of a disk drive (10) from external magnetic fields includes a housing shield (24) positioned near the storage disk (13). The housing shield (24) includes a base shield portion (60) and a cover shield portion (64) that are positioned substantially parallel to the storage disk (13). The housing shield (24) also includes one or more wall shield portions (62) oriented substantially perpendicular to the storage disk (13). The housing shield (24) is uniquely sized, shaped and formed from material to have an attenuation of field of at least approximately 10 dB. With this design, the influence of external magnetic fields is reduced and the incidence of damage to data stored on the storage disk (13) is reduced. Additionally, the housing shield (24) enhances the accurate transfer of information between the storage disk (13) and the data transducer (48) of the disk drive (10).
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: June 27, 2006
    Assignee: Maxtor Corporation
    Inventor: Hai Chi Nguy
  • Transverse biased shields for perpendicular recording to reduce stray field sensitivity
    Patent number: 6995950
    Abstract: A method for reducing flux concentrating capacity of a shield in a magnetic read/write head positioned to read perpendicular residual magnetic fields on a magnetic media. Permeability of the shield is reduced in a direction oriented perpendicular to the magnetic media by inducing a transverse magnetic bias field within the shield.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: February 7, 2006
    Assignee: Maxtor Corporation
    Inventors: Bruce Lairson, Mark Nichols, Hai Chi Nguy, Tim Glassburn
  • Concave trailing edge write pole for perpendicular recording
    Patent number: 6950277
    Abstract: A magnetic recording system includes a magnetic medium and a magnetic write head to write information on the magnetic medium. The magnetic write head includes a write pole having a downstream side that has a concave shaped portion when the write pole is viewed from an air bearing surface of the magnetic write head.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: September 27, 2005
    Assignee: Maxtor Corporation
    Inventors: Hai Chi Nguy, Michael Mallary, Adam F. Torabi, Bruce Lairson
  • Transverse biased shields for perpendicular recording to reduce stray field sensitivity
    Publication number: 20020171982
    Abstract: A method for reducing flux concentrating capacity of a shield in a magnetic read/write head positioned to read perpendicular residual magnetic fields on a magnetic media. Permeability of the shield is reduced in a direction oriented perpendicular to the magnetic media by inducing a transverse magnetic bias field within the shield.
    Type: Application
    Filed: April 9, 2001
    Publication date: November 21, 2002
    Inventors: Bruce Lairson, Mark Nichols, Hai Chi Nguy, Tim Glassburn
  • Magnetic shield for a recording drive
    Publication number: 20020141109
    Abstract: A drive housing (22) for shielding a storage disk (13) and a data transducer (48) of a disk drive (10) from external magnetic fields includes a housing shield (24) positioned near the storage disk (13). The housing shield (24) includes a base shield portion (60) and a cover shield portion (64) that are positioned substantially parallel to the storage disk (13). The housing shield (24) also includes one or more wall shield portions (62) oriented substantially perpendicular to the storage disk (13). The housing shield (24) is uniquely sized, shaped and formed from material to have an attenuation of field of at least approximately 10 dB. With this design, the influence of external magnetic fields is reduced and the incidence of damage to data stored on the storage disk (13) is reduced. Additionally, the housing shield (24) enhances the accurate transfer of information between the storage disk (13) and the data transducer (48) of the disk drive (10).
    Type: Application
    Filed: March 30, 2001
    Publication date: October 3, 2002
    Inventor: Hai Chi Nguy