Patents by Inventor David A. Dudek

David A. Dudek 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).

  • Method of forming a magnetic read/write head
    Patent number: 7770285
    Abstract: A magnetic read/write head is produced with an insert layer between the substrate and the magnetic transducer. The insert layer has a lower coefficient of thermal expansion than the substrate, which reduces the temperature pole tip recession (T-PTR) of the head because the insert layer is an intervening layer between the substrate and magnetic transducer. The insert layer is produced by plating, e.g., an Invar layer over the substrate prior to fabricating the magnetic transducer. The Invar layer is annealed and the structure planarized prior to depositing a non-magnetic gap layer followed by the fabrication of the magnetic transducer.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: August 10, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Christian R. Bonhote, Malika D. Carter, David A. Dudek, Wen-Chien D. Hsiao, John W. Lam, Vladimir Nikitin
  • Head Design With Low Coefficient of Thermal Expansion Insert Layer
    Publication number: 20080172862
    Abstract: A magnetic read/write head is produced with an insert layer between the substrate and the magnetic transducer. The insert layer has a lower coefficient of thermal expansion than the substrate, which reduces the temperature pole tip recession (T-PTR) of the head because the insert layer is an intervening layer between the substrate and magnetic transducer. The insert layer is produced by plating, e.g., an Invar layer over the substrate prior to fabricating the magnetic transducer. The Invar layer is annealed and the structure planarized prior to depositing a non-magnetic gap layer followed by the fabrication of the magnetic transducer.
    Type: Application
    Filed: March 28, 2008
    Publication date: July 24, 2008
    Inventors: Christian R. Bonhote, Malika D. Carter, David A. Dudek, Wen-Chien D. Hsiao, John W. Lam, Vladimir Nikitin