Patents by Inventor Hung Jai Lee

Hung Jai Lee 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).

  • Interconnection scheme for head arms of disk drive actuator
    Patent number: 6940697
    Abstract: The invention includes at least one head arm providing head electrical interconnection as essentially parallel traces on at least one face of the head arm using the metallic body of the head arm as a ground plane. This insures that the neighboring pairs of parallel traces used for differential read and write interconnection have essentially matched impedance, lowering crosstalk between the write and read signal pairs. The invention includes voice coil actuator arms comprising at least one of these head arms, as well as, disk drives made using these voice coil actuator arms.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: September 6, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun Kyu Jang, Hung Jai Lee
  • Method and apparatus determining maximum read bias current and maximum write current for disk merged read/write heads based upon write current and measured read resistance
    Patent number: 6898040
    Abstract: The invention includes operating a merged read/write head in a disk drive by determining both the maximum read bias current and maximum write current, based upon the measured read resistance of the read mechanism and the write current in use with the write mechanism. Both the read mechanism and write mechanism are near each other in the merged read/write head.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: May 24, 2005
    Assignee: Samsung Electronics Co., LTD
    Inventors: Eun Kyu Jang, Hung Jai Lee
  • Method and apparatus determining maximum read bias current and maximum write current for disk merged read/write heads based upon write current and measured read resistance
    Publication number: 20030117737
    Abstract: The invention includes operating a merged read/write head in a disk drive by determining both the maximum read bias current and maximum write current, based upon the measured read resistance of the read mechanism and the write current in use with the write mechanism. Both the read mechanism and write mechanism are near each other in the merged read/write head.
    Type: Application
    Filed: December 6, 2001
    Publication date: June 26, 2003
    Inventors: Eun Kyu Jang, Hung Jai Lee
  • Interconnection scheme for head arms of disk drive actuator
    Publication number: 20030103296
    Abstract: The invention includes at least one head arm providing head electrical interconnection as essentially parallel traces on at least one face of the head arm using the metallic body of the head arm as a ground plane. This insures that the neighboring pairs of parallel traces used for differential read and write interconnection have essentially matched impedance, lowering crosstalk between the write and read signal pairs. The invention includes voice coil actuator arms comprising at least one of these head arms, as well as, disk drives made using these voice coil actuator arms.
    Type: Application
    Filed: December 5, 2001
    Publication date: June 5, 2003
    Inventors: Eun Kyu Jang, Hung Jai Lee