Patents by Inventor Myung-wook Song

Myung-wook Song 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).

  • Patent number: 8174795
    Abstract: A hard disk drive has a disk, a spindle motor for rotating the disk, a head stack assembly including a swing arm and a head slider disposed at a leading end of the swing arm, and a controller operatively connected to the head slider. The head slider is positioned by the swing arm over the disk and floats in such position during a read/write operation in which data is being read from or written onto the disk. The head slider has a head slider body, a magnetic head embedded in the body, and at least one resistive heating element that generates heat when current is supplied thereto. The heat causes the body of the head slider to thermally expand in such a way that the profile of the disk-facing side of the body of the head slider changes. The controller controls the height of the head slider relative to the disk by controlling the supplying of current to the resistive heating element(s).
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: May 8, 2012
    Assignee: Seagate Technology International
    Inventors: Myung-wook Song, Yong-bae Yoon
  • Publication number: 20120075744
    Abstract: A hard disk drive includes a controller that optimizes a flying height of a head of a hard disk drive. The controller determines an optimal flying height of a head based on a preset table value and an MRR value of a head measured during a hard disk drive manufacturing process and sets the head according the determined optimal flying height such that recording capacitance is improved.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 29, 2012
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Seong Yong YOON, Myung Wook Song, Chang-Hwan Lee, Su-Hyeon Kim
  • Patent number: 7602571
    Abstract: An apparatus and method to retry data read and write while changing a flying height of a magnetic head in a disk drive. The apparatus includes the magnetic head including a magnetic read element to sense a magnetic field on a disk and a magnetic write element to magnetize the disk, having a structure to generate an air bearing surface between the surface of the disk and the magnetic read and write elements, and includes a heater heating an assembly to generate the air bearing surface, a controller to generate a power control signal to adjust a flying height of the magnetic head in a retry mode, and a heater power supply circuit to generate power corresponding to the power control signal and to supply the power to the heater.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: October 13, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myung-wook Song, Hyun-bum Cho
  • Publication number: 20080174916
    Abstract: A hard disk drive has a disk, a spindle motor for rotating the disk, a head stack assembly including a swing arm and a head slider disposed at a leading end of the swing arm, and a controller operatively connected to the head slider. The head slider is positioned by the swing arm over the disk and floats in such position during a read/write operation in which data is being read from or written onto the disk. The head slider has a head slider body, a magnetic head embedded in the body, and at least one resistive heating element that generates heat when current is supplied thereto. The heat causes the body of the head slider to thermally expand in such a way that the profile of the disk-facing side of the body of the head slider changes. The controller controls the height of the head slider relative to the disk by controlling the supplying of current to the resistive heating element(s).
    Type: Application
    Filed: January 23, 2008
    Publication date: July 24, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Myung-wook SONG, Yong-bae YOON
  • Publication number: 20070230019
    Abstract: An apparatus and method to retry data read and write while changing a flying height of a magnetic head in a disk drive. The apparatus includes the magnetic head including a magnetic read element to sense a magnetic field on a disk and a magnetic write element to magnetize the disk, having a structure to generate an air bearing surface between the surface of the disk and the magnetic read and write elements, and includes a heater heating an assembly to generate the air bearing surface, a controller to generate a power control signal to adjust a flying height of the magnetic head in a retry mode, and a heater power supply circuit to generate power corresponding to the power control signal and to supply the power to the heater.
    Type: Application
    Filed: April 2, 2007
    Publication date: October 4, 2007
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Myung-wook SONG, Hyun-bum Cho