Patents by Inventor Martin Yu-Wen Chen

Martin Yu-Wen Chen 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).

  • Fly-height management in a hard disk drive (HDD)
    Patent number: 8098450
    Abstract: A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air bearing surface (ABS) of the slider. The HDD also includes a second RTD configured to detect at least one temperature correlated to a fly-height of the slider. The second RTD is not required to be proximate the ABS of the slider. HDD also includes a read/write integrated circuit (IC) configured to determine the fly-height of the slider based on detection of temperatures by the first RTD and the second RTD.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: January 17, 2012
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventors: Peter Baumgart, Martin Yu-Wen Chen, John T. Contreras, Sujit Kirpekar, Bernhard E. Knigge
  • FLY-HEIGHT MANAGEMENT IN A HARD DISK DRIVE (HDD)
    Publication number: 20110157740
    Abstract: A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air bearing surface (ABS) of the slider. The HDD also includes a second RTD configured to detect at least one temperature correlated to a fly-height of the slider. The second RTD is not required to be proximate the ABS of the slider. HDD also includes a read/write integrated circuit (IC) configured to determine the fly-height of the slider based on detection of temperatures by the first RTD and the second RTD.
    Type: Application
    Filed: December 31, 2009
    Publication date: June 30, 2011
    Inventors: Peter BAUMGART, Martin Yu-Wen Chen, John T. Contreras, Sujit Kirpekar, Bernhard E. Knigge
  • Head-disk contact detection and work function difference determination
    Patent number: 7830634
    Abstract: In a method of head-disk contact detection in a hard disk drive, a Radio Frequency (RF) carrier signal is injected into a slider which is flying above a surface of a disk in a hard disk drive. A modulated version of the RF carrier signal is received from the slider. The modulated version of the RF carrier signal is demodulated to achieve a demodulated signal. A signal spectrum of a range of frequencies in the demodulated signal is monitored for activity indicative of a contact between a head of the slider and the surface of the disk. An occurrence of the contact is determined based upon an occurrence of the activity.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: November 9, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Martin Yu-Wen Chen, John Contreras, Luiz M. Franca-Neto, Bernhard E. Knigge
  • HEAD-DISK CONTACT DETECTION AND WORK FUNCTION DIFFERENCE DETERMINATION
    Publication number: 20100157454
    Abstract: In a method of head-disk contact detection in a hard disk drive, a Radio Frequency (RF) carrier signal is injected into a slider which is flying above a surface of a disk in a hard disk drive. A modulated version of the RF carrier signal is received from the slider. The modulated version of the RF carrier signal is demodulated to achieve a demodulated signal. A signal spectrum of a range of frequencies in the demodulated signal is monitored for activity indicative of a contact between a head of the slider and the surface of the disk. An occurrence of the contact is determined based upon an occurrence of the activity.
    Type: Application
    Filed: December 23, 2008
    Publication date: June 24, 2010
    Inventors: Martin Yu-Wen CHEN, John Contreras, Luiz M. Franca-Neto, Bernhard E. Knigge