Patents by Inventor David M. Grundman

David M. Grundman 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).

  • Heat-assisted magnetic recording head with constant-width gap between near-field transducer and side shield
    Patent number: 10811035
    Abstract: A recording head includes a waveguide core and write pole extending to a media-facing surface of the recording head. A near-field transducer is located between the waveguide core and the write pole. First and second side shields are located on either crosstrack side of the near-field transducer. The first and second shields have edges facing and conformal with first and second tapered sides and a peg of the near-field transducer such that there are respective first and second constant-width gaps therebetween.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: October 20, 2020
    Assignee: Seagate Technology LLC
    Inventors: TaeWoo Lee, David M. Grundman
  • Structure positioned between magnetic pole and near-field transducer
    Patent number: 9449626
    Abstract: An apparatus includes a waveguide, a magnetic pole, and a near-field transducer. The near field transducer is positioned at or near a media-facing surface. The near-field transducer is operatively coupled to the waveguide. The near-field transducer includes an enlarged region. The near-field transducer also includes a peg region extending from the enlarged region towards the media-facing surface. The peg region is separated from the magnetic pole. The near-field transducer also includes a structure positioned between the magnetic pole and the peg region. The structure is separated from the peg region by a gap. The structure extends from the enlarged region towards the media-facing surface. The structure is configured to extend generation of surface plasmons toward the magnetic pole.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: September 20, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Tae-Woo Lee, David M. Grundman
  • STRUCTURE POSITIONED BETWEEN MAGNETIC POLE AND NEAR-FIELD TRANSDUCER
    Publication number: 20160133286
    Abstract: An apparatus includes a waveguide, a magnetic pole, and a near-field transducer. The near field transducer is positioned at or near a media-facing surface. The near-field transducer is operatively coupled to the waveguide. The near-field transducer includes an enlarged region. The near-field transducer also includes a peg region extending from the enlarged region towards the media-facing surface. The peg region is separated from the magnetic pole. The near-field transducer also includes a structure positioned between the magnetic pole and the peg region. The structure is separated from the peg region by a gap. The structure extends from the enlarged region towards the media-facing surface. The structure is configured to extend generation of surface plasmons toward the magnetic pole.
    Type: Application
    Filed: October 19, 2015
    Publication date: May 12, 2016
    Inventors: Tae-Woo Lee, David M. Grundman