Patents by Inventor Shunichi Taka

Shunichi Taka 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 of fabricating a magnetic head by sputter etching
    Patent number: 5052099
    Abstract: A floating type magnetic head is made of a polycrystalline material. A surface to be opposed to a magnetic recording medium is undulated with lands and grooves having a height difference of 50 to 200 .ANG. on an average and a repetition pitch of 5 to 20 microns on an average. The portions, in which the heights of the lands and the grooves abruptly change, extend along the boundaries of the polycrystals. The head surface opposed to the magnetic recording medium is sputter-etched to have the predetermined surface roughness.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: October 1, 1991
    Assignee: Hitachi Metals, Ltd.
    Inventors: Akira Taguchi, Shigetoshi Morita, Shunichi Taka, Hirohide Yamada, Yoshiaki Takada, Shinji Furuichi, Masahiro Ao
  • Floating magnetic head having improved static friction coefficient
    Patent number: 5010429
    Abstract: A floating type magnetic head is made of a polycrystalline material. A surface to be opposed to a magnetic recording medium is undulated with lands and grooves having a height different of 50 to 200 .ANG. on an average and a repetition pitch of 5 to 20 microns on an average. The portions, in which the heights of the lands and the grooves abruptly change, extend along the boundaries of the polycrystals. The head surface opposed to the magnetic recording medium is sputter-etched to have the predetermined surface roughness.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: April 23, 1991
    Assignee: Hitachi Metals, Ltd.
    Inventors: Akira Taguchi, Shigetoshi Morita, Shunichi Taka, Hirohide Yamada, Yoshiaki Takada, Shinji Furuichi, Masahiro Ao
  • Magnetic head assembly
    Patent number: 4506308
    Abstract: A magnetic head assembly comprising a read/write head unit adapted for reading and writing data and provided with a magnetic core 1 having a thin sheet of an Mn-Zn ferrite. The magnetic head assembly also has erase head units bonded to the read/write head unit and adapted to erase the edges of the data, each of the erase head units being provided with a magnetic core 2 having a thin sheet of an Ni-Zn ferrite. The read/write head unit and erase head units are bonded by means of a glass 6.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: March 19, 1985
    Assignee: Hitachi Metals, Ltd.
    Inventors: Shinji Furuichi, Shigetoshi Morita, Shunichi Taka, Hirohisa Suwabe