Patents by Inventor Seiji Kurashina

Seiji Kurashina 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 head and method for magnetic recording and playback
    Patent number: 6137663
    Abstract: A magnetoresistive effect type magnetic head has a magnetoresistive effect (magnetoresistive effect film) and a soft adjacent layer (SAL) that is disposed in opposition to the magnetoresistive effect film via an intervening non-magnetic film, for the purpose of applying a transversal bias magnetic field to the magnetoresistive effect film, and also has an antiferromagnetic film which is disposed so as to be in contact with at least part of the magnetoresistive effect film, for the purpose of applying a longitudinal bias magnetic field to the magnetoresistive effect film. The surface area of the region over which the magnetoresistive effect film makes contact with the antiferromagnetic film is established so as to be greater than the surface area of the active region thereof which does not contact the antiferromagnetic film.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: October 24, 2000
    Assignee: NEC Corporation
    Inventor: Seiji Kurashina