Patents by Inventor Nobuhiro Sugawara

Nobuhiro Sugawara 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).

  • Patent number: 5946168
    Abstract: A magneto-resistance effect device (MR device) in which stable magneto-resistance characteristics may be achieved even if a layer of a soft magnetic material is reduced in width. The MR device includes a layer of a soft magnetic material 1, a rear end electrode 4, connected to one longitudinal end of the layer of a soft magnetic material 1, and a forward end electrode 5 connected to the opposite end of the soft magnetic material 1. On both ends of the layer of the soft magnetic material 1 are arranged magnetic domain stabilizers 2, 3 generating a bias magnetic field having a component parallel to the direction of width of the layer of a soft magnetic material 1. If the bias magnetic field sufficient to overcome the longitudinal magnetostatic anisotropy can be impressed, the direction of magnetization D.sub.f of the mono-layer soft magnetic material 1 is oriented in the direction of width.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: August 31, 1999
    Assignee: Sony Corporation
    Inventors: Minoru Hashimoto, Nobuhiro Sugawara, Toshihiko Yaoi, Hiroshi Kano
  • Patent number: 5867350
    Abstract: A magneto-resistance effect magnetic head having a uniform bias distribution and adapted for avoiding shorting between a magneto-resistance device and a bias conductor wherein a magneto-resistance device 5 and a bias conductor 6 for applying a bias magnetic field to the magneto-resistance device 5 are interposed between a lower shielding magnetic member 1 and an upper shielding magnetic member 2. The bias conductor is embedded in a groove formed in the shielding magnetic member provided on the opposite side of forward and rear electrodes with respect to the magneto-resistance effect device.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: February 2, 1999
    Assignee: Sony Corporation
    Inventors: Shuichi Haga, Mamoru Sasaki, Hideo Suyama, Nobuhiro Sugawara, Akio Takada, Mikiya Kurosu, Chizuru Ohshima
  • Patent number: 5671105
    Abstract: A magneto-resistive effect thin-film magnetic head including a magnetic layer exhibiting a magneto-resistive effect, the magnetic layer having a longitudinal axis and two ends positioned at opposite ends of the longitudinal axis, and a flux guide layer of a high magnetic permeability soft magnetic material formed at an overlapping one end of the magnetic layer, the flux guide layer having two opposite ends longitudinally aligned with the longitudinal axis of the magnetic layer. On overlapping both ends of the flux guide layer, there are formed separate hard fills operating as permanent magnets.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: September 23, 1997
    Assignee: Sony Corporation
    Inventors: Nobuhiro Sugawara, Hideo Suyama, Akio Takada