Patents by Inventor Kohichiroh Naka

Kohichiroh Naka 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: 11676628
    Abstract: A hard disk drive head slider housing a read-write transducer includes a plurality of electrical connection pads, where each electrical pad includes an interconnection portion configured for electrically connecting to an interconnected component, such as a lead suspension, a probe contact portion configured for electrical testing the head slider, and at least one slit positioned between the interconnection portion and the probe contact portion, thereby physically distinguishing and separating the two portions of a multiple-portion pad to inhibit undesirable solder flow to the wider probe contact portion on the slider side of each pad. A more controlled solder joint is provided, while the probe contact portion can remain relatively wide for probe contact and the interconnection portion can remain relatively narrow to reduce solder bridges among the pads.
    Type: Grant
    Filed: December 2, 2021
    Date of Patent: June 13, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Kohichiroh Naka, Takeshi Hyugano, Kenichi Murata, Yuhsuke Matsumoto
  • Publication number: 20230178105
    Abstract: A hard disk drive head slider housing a read-write transducer includes a plurality of electrical connection pads, where each electrical pad includes an interconnection portion configured for electrically connecting to an interconnected component, such as a lead suspension, a probe contact portion configured for electrical testing the head slider, and at least one slit positioned between the interconnection portion and the probe contact portion, thereby physically distinguishing and separating the two portions of a multiple-portion pad to inhibit undesirable solder flow to the wider probe contact portion on the slider side of each pad. A more controlled solder joint is provided, while the probe contact portion can remain relatively wide for probe contact and the interconnection portion can remain relatively narrow to reduce solder bridges among the pads.
    Type: Application
    Filed: December 2, 2021
    Publication date: June 8, 2023
    Inventors: Kohichiroh Naka, Takeshi Hyugano, Kenichi Murata, Yuhsuke Matsumoto
  • Patent number: 11631426
    Abstract: A hard disk drive suspension assembly includes a pad base layer, a pad-end fixing layer, and a plurality of electrical pads each comprising a conductive layer on the pad base layer, where the base layer extends to the fixing layer, to which a distal end of the base layer is fixed. This configuration inhibits the delamination or deformation of the end edge of each pad. An additional cover layer may be implemented to cover the distal end of the conductive layer(s), further inhibiting deformation of the pads. These techniques are especially relevant with narrow, high-density, small pitch electrical pads.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: April 18, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Kohichiroh Naka, Hiroyasu Tsuchida, Kenichi Murata, Yuhsuke Matsumoto
  • Patent number: 7550695
    Abstract: Embodiments of the invention correct the static attitude of a head gimbal assembly (HGA) with high accuracy. In one embodiment, a vector group that constitutes the shortest path from the initial attitude of the HGA to the final anticipatory attitude is formed. The vector group is formed of the plural displacement vectors that give a variety of variations in static attitude when unit shots of laser light are performed on the HGA. Displacement vectors are synthesized while the displacement vectors each giving the anticipatory attitude closest to a target attitude are being selected in order from the initial attitude, toward the target attitude. Unit shots equivalent to the number of displacement vectors are performed on irradiating positions related to the displacement vectors included in the vector group. The static attitude existing after the unit shots is measured, then the displacement vectors are corrected, and a vector group constituting the new shortest path is formed.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: June 23, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yohtaroh Ichimura, Kohichiroh Naka, Yoshio Uematsu, Tatsushi Yoshida
  • Publication number: 20060053621
    Abstract: Embodiments of the invention correct the static attitude of a head gimbal assembly (HGA) with high accuracy. In one embodiment, a vector group that constitutes the shortest path from the initial attitude of the HGA to the final anticipatory attitude is formed. The vector group is formed of the plural displacement vectors that give a variety of variations in static attitude when unit shots of laser light are performed on the HGA. Displacement vectors are synthesized while the displacement vectors each giving the anticipatory attitude closest to a target attitude are being selected in order from the initial attitude, toward the target attitude. Unit shots equivalent to the number of displacement vectors are performed on irradiating positions related to the displacement vectors included in the vector group. The static attitude existing after the unit shots is measured, then the displacement vectors are corrected, and a vector group constituting the new shortest path is formed.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 16, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yohtaroh Ichimura, Kohichiroh Naka, Yoshio Uematsu, Tatsushi Yoshida
  • Patent number: 6848167
    Abstract: A head gimbal assembly, which is a component of a hard disk drive, has a bending portion that has elasticity and is bent at a predetermined angle under an unloaded condition, and a slider is bonded to a holding portion thereof by mounting the head gimbal assembly on a bonding jig in a state in which the bending portion is stretched. When the head gimbal assembly is separated from the bonding jig after bonding, the bending portion is not restored freely, so that the head gimbal assembly is caught by the bonding jig during the separating process and a locked state is sometimes established.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: February 1, 2005
    Assignee: International Business Machines Corporation
    Inventors: Yasuhiro Mita, Kohichiroh Naka, Takuya Satoh, Tatsumi Tsuchiya, Tatsushi Yoshida
  • Publication number: 20010054225
    Abstract: A head gimbal assembly, which is a component of a hard disk drive, has a bending portion that has elasticity and is bent at a predetermined angle under an unloaded condition, and a slider is bonded to a holding portion thereof by mounting the head gimbal assembly on a bonding jig in a state in which the bending portion is stretched. When the head gimbal assembly is separated from the bonding jig after bonding, the bending portion is not restored freely, so that the head gimbal assembly is caught by the bonding jig during the separating process and a locked state is sometimes established.
    Type: Application
    Filed: June 12, 2001
    Publication date: December 27, 2001
    Applicant: International Business Machines Corporation
    Inventors: Yasuhiro Mita, Kohichiroh Naka, Takuya Satoh, Tatsumi Tsuchiya, Tatsushi Yoshida