Patents by Inventor Mark H. BURKHARDT

Mark H. BURKHARDT 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).

  • Magnetic recording head with trailing shield having multiple throat-heights
    Patent number: 11894028
    Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole and a trailing shield disposed adjacent to the main pole. A recessed edge of the trailing shield has throat heights varying in the cross-track direction. In one embodiment, the central portion of the trailing shield has a first throat height greater than a second throat height of outer portions of the trailing shield. The trailing shield having varying throat heights in the cross-track direction strengthens the writing capability or improves the XTI of the magnetic recording head.
    Type: Grant
    Filed: December 16, 2022
    Date of Patent: February 6, 2024
    Assignee: Western Digital Technologies, Inc.
    Inventors: Quan-Chiu Harry Lam, Mark H. Burkhardt, El-Amine Salhi
  • Magnetic recording head with trailing shield having multiple throat-heights
    Patent number: 11657837
    Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole and a trailing shield disposed adjacent to the main pole. A recessed edge of the trailing shield has throat heights varying in the cross-track direction. In one embodiment, a central portion of the trailing shield disposed adjacent or closest to the main pole has a first throat height less than a second throat height of outer portions of the trailing shield further from the main pole. In another embodiment, the central portion of the trailing shield has a first throat height greater than a second throat height of outer portions of the trailing shield. The trailing shield having varying throat heights in the cross-track direction strengthens the writing capability or improves the XTI of the magnetic recording head.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: May 23, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Quan-Chiu Harry Lam, Mark H. Burkhardt, El-Amine Salhi
  • Magnetic Recording Head with Trailing Shield Having Multiple Throat-Heights
    Publication number: 20230118634
    Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole and a trailing shield disposed adjacent to the main pole. A recessed edge of the trailing shield has throat heights varying in the cross-track direction. In one embodiment, a central portion of the trailing shield disposed adjacent or closest to the main pole has a first throat height less than a second throat height of outer portions of the trailing shield further from the main pole. In another embodiment, the central portion of the trailing shield has a first throat height greater than a second throat height of outer portions of the trailing shield. The trailing shield having varying throat heights in the cross-track direction strengthens the writing capability or improves the XTI of the magnetic recording head.
    Type: Application
    Filed: December 16, 2022
    Publication date: April 20, 2023
    Applicant: Western Digital Technologies, Inc.
    Inventors: Quan-Chiu Harry LAM, Mark H. BURKHARDT, El-Amine SALHI
  • Magnetic Recording Head with Trailing Shield Having Multiple Throat-Heights
    Publication number: 20220375495
    Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole and a trailing shield disposed adjacent to the main pole. A recessed edge of the trailing shield has throat heights varying in the cross-track direction. In one embodiment, a central portion of the trailing shield disposed adjacent or closest to the main pole has a first throat height less than a second throat height of outer portions of the trailing shield further from the main pole. In another embodiment, the central portion of the trailing shield has a first throat height greater than a second throat height of outer portions of the trailing shield. The trailing shield having varying throat heights in the cross-track direction strengthens the writing capability or improves the XTI of the magnetic recording head.
    Type: Application
    Filed: May 19, 2021
    Publication date: November 24, 2022
    Inventors: Quan-Chiu Harry LAM, Mark H. BURKHARDT, El-Amine SALHI