Patents by Inventor Yuji Ohtsubo

Yuji Ohtsubo 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 with inductive magnetic conversion element and magnetoresistive conversion element
    Patent number: 5936812
    Abstract: An upper magnetic layer and a lower magnetic layer of an inductive magnetic conversion element constitute pole tips which face opposite each other over a gap layer at their front end portions and have a back gap portion for completing a thin film magnetic circuit at the rear. A magnetoresistive element is provided on a slider below the inductive magnetic conversion element between an upper shield layer positioned above it and a lower shield layer positioned below it. The upper shield layer also constitutes the lower magnetic layer of the inductive magnetic conversion element. The lower shield layer is formed outside a projection area achieved by projecting the back gap portion onto the surface where the lower shield layer is formed.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: August 10, 1999
    Assignee: TDK Corporation
    Inventors: Koichi Terunuma, Yuji Ohtsubo