Patents by Inventor Kazunori Onuma

Kazunori Onuma 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: 8031215
    Abstract: A thermal head which forms an image on a recording medium by pressing a protruding portion on which heating elements are arranged on the recording medium while driving the heating elements to be heated includes a support substrate in which a concave gap portion facing the protruding portion is formed and a glaze layer provided on the support substrate and in which the protruding portion is formed, in which the glaze layer has a base layer stacked on the support substrate as well as forming a ceiling surface of the gap portion and a heat resistant layer stacked on the base layer and on which the heating elements are arranged.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: October 4, 2011
    Assignee: Sony Corporation
    Inventors: Noboru Koyama, Mitsuo Yanase, Toru Morikawa, Kazunori Onuma
  • Publication number: 20090201355
    Abstract: A thermal head which forms an image on a recording medium by pressing a protruding portion on which heating elements are arranged on the recording medium while driving the heating elements to be heated includes a support substrate in which a concave gap portion facing the protruding portion is formed and a glaze layer provided on the support substrate and in which the protruding portion is formed, in which the glaze layer has a base layer stacked on the support substrate as well as forming a ceiling surface of the gap portion and a heat resistant layer stacked on the base layer and on which the heating elements are arranged.
    Type: Application
    Filed: January 29, 2009
    Publication date: August 13, 2009
    Applicant: Sony Corporation
    Inventors: Noboru Koyama, Mitsuo Yanase, Toru Morikawa, Kazunori Onuma
  • Patent number: 6657824
    Abstract: It is assumed that W1 is the width for an end face of the lower magnetic shield thin film 4 which is exposed outward from the tape sliding surface 1a. It is also assumed that W2 corresponds to the sum of the width for an end face of the MR element 7 which is exposed outward from the tape sliding surface 1a and widths for end faces of a pair of ferromagnetic films 9 and 10 which are exposed outward therefrom. The width W1 is determined to be smaller than W2. When the MR head 1 is mounted on the head support plate 30 or the rotary drum 42, it is possible to use as a marker the lower magnetic shield thin film 4's end face exposed from the tape sliding surface.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: December 2, 2003
    Assignee: Sony Corporation
    Inventor: Kazunori Onuma
  • Patent number: 6452760
    Abstract: The width W1 of the lower shield thin film 3 and the width W2 of the upper shield thin film 7 are specified so that each of these widths is larger than the width W3 of the MR element 5 and is smaller than the contact width W4.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: September 17, 2002
    Assignee: Sony Corporation
    Inventors: Teruo Inaguma, Eiji Nakashio, Kazunori Onuma
  • Patent number: 6031691
    Abstract: A magnetoresistance effect magnetic head which is capable of shortening shield gap distance and which can be manufactured by a small number of manufacturing steps, and a manufacturing method therefor are provided. The magnetoresistance effect magnetic head having a magnetoresistance effect magnetic device held between a pair of soft magnetic members through insulating layers and conductors connected to the magnetoresistance effect magnetic device is structured such that the conductors are embedded in grooves formed in the insulating layer. Since the magnetoresistance effect magnetic device has the structure such that the conductors connected to the magnetoresistance effect magnetic device are embedded in the grooves formed in the insulating layer, the shield gap distance can be shortened.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: February 29, 2000
    Assignee: Sony Corporation
    Inventors: Kazunori Onuma, Akira Murakami
  • Patent number: 5691867
    Abstract: The present invention intends to solve the above described problems and provides a high reliability complex type thin film magnetic head in which high recording magnetic field density is achieved without deteriorating an MR element by heat, and in the case when the complex type thin film magnetic head is of sliding type, eccentric friction likely to occur in a lower magnetic core and a upper magnetic core is relaxed and production method thereof. The complex type thin film magnetic head is structured by forming an MR head portion on an inductive head portion produced on a base substrate. Conductive coils are formed on the recess portions formed on the lower magnetic core because the groove portions exist through a first flattening layer.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: November 25, 1997
    Assignee: Sony Corporation
    Inventors: Hiroshi Onuma, Kazunori Onuma, Takashi Tamura