Patents by Inventor Masato Yumoto

Masato Yumoto 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 for producing thin film magnetic head
    Patent number: 5483734
    Abstract: A lower magnetic film, a magnetic gap layer, a conductor coil, an insulating layer for electrically insulating the conductor coil, an upper magnetic film and a protective film are laminated on a substrate. Formation data of a lamination step are collected. An optimum value of a magnetic gap depth G of the magnetic gap layer is calculated on the basis of the formation data. The magnetic gap depth is machined to the optimum value on the basis of the optimum value so calculated.
    Type: Grant
    Filed: September 8, 1993
    Date of Patent: January 16, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Yukihiro Isono, Makoto Saito, Kazuyoshi Adachi, Masato Yumoto, Akio Takakura