Patents by Inventor Yusuke Touma

Yusuke Touma 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).

  • Thin-film magnetic head in which perpendicular magnetic record head overlaps on reproducing head
    Patent number: 7821745
    Abstract: A thin-film magnetic head is provided. The thin-film magnetic head includes a return-yoke layer formed on an opposed surface such that a maximum length of the return-yoke layer is shorter than a longer length of the length of the upper shield layer and the lower shield layer. The length sets in the range of 0 to 2 ?m, and more preferably 2 ?m. Accordingly, magnitudes of leakage magnetic fields leaked from each front end surface of return-yoke layer, the upper shield layer, and the lower shield layer toward the record medium are balanced and reduced. An advantage of the invention is to provide a thin-film magnetic head so as to prevent a record data recorded in a record medium from being erased.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: October 26, 2010
    Assignee: TDK Corporation
    Inventors: Hiroshi Kameda, Yusuke Touma
  • THIN-FILM MAGNETIC HEAD IN WHICH PERPENDICULAR MAGNETIC RECORD HEAD OVERLAPS ON REPRODUCING HEAD
    Publication number: 20070195453
    Abstract: A thin-film magnetic head is provided. The thin-film magnetic head includes a return-yoke layer formed on an opposed surface such that a maximum length of the return-yoke layer is shorter than a longer length of the length of the upper shield layer and the lower shield layer. The length sets in the range of 0 to 2 ?m, and more preferably 2 ?m. Accordingly, magnitudes of leakage magnetic fields leaked from each front end surface of return-yoke layer, the upper shield layer, and the lower shield layer toward the record medium are balanced and reduced. An advantage of the invention is to provide a thin-film magnetic head so as to prevent a record data recorded in a record medium from being erased.
    Type: Application
    Filed: February 20, 2007
    Publication date: August 23, 2007
    Applicant: ALPS ELECTRIC CO., LTD.
    Inventors: Hiroshi KAMEDA, Yusuke Touma