Patents by Inventor Hans-Peter Nickel

Hans-Peter Nickel 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).

  • Recession control via thermal expansion coefficient differences in recording heads during lapping
    Patent number: 6679762
    Abstract: A method is disclosed for precision control of pole tip recession of magnetic recording heads. This is achieved by first constructing the head so that the thermal expansion coefficient of the recording head is different from the thermal expansion coefficient of the overcoat. Then the recording head is heated during the lapping process of the slider and recording head. The average and distribution of the recession between the overcoat and the recording head pole tips are improved.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: January 20, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Joseph John Fatula, Jr., Hans-Peter Nickel
  • Recession control via thermal expansion coefficient differences in recording heads during lapping
    Publication number: 20020155794
    Abstract: A method is disclosed for precision control of pole tip recession of magnetic recording heads. This is achieved by first constructing the head so that the thermal expansion coefficient of the recording head is different from the thermal expansion coefficient of the overcoat. Then the recording head is heated during the lapping process of the slider and recording head. The average and distribution of the recession between the overcoat and the recording head pole tips are improved.
    Type: Application
    Filed: April 19, 2001
    Publication date: October 24, 2002
    Inventors: Joseph John Fatula, Hans-Peter Nickel