Patents by Inventor Yoshimitsu Wada

Yoshimitsu Wada 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).

  • Publication number: 20210215052
    Abstract: A turbine impeller includes: a base material which contains aluminum as a main element; and an anti-erosion coating which covers a surface of the base material. Accordingly, since liquid droplets hit the anti-erosion coating before the base material even when the liquid droplets flow into the rotating turbine impeller, the damage to the base material due to erosion is suppressed.
    Type: Application
    Filed: June 6, 2019
    Publication date: July 15, 2021
    Applicant: IHI Corporation
    Inventors: Yoshimitsu MATSUYAMA, Yukio TAKAHASHI, Atsushi HIRATA, Kazuo MIYOSHI, Kenichi TAKAHASHI, Daisuke WADA, Yasuhiro RAI
  • Publication number: 20200209324
    Abstract: This sensor unit includes a base having a substantially-rectangular planar shape including a first side and a second side that are substantially orthogonal to each other, and a plurality of first sensors provided on the base and arranged on a first axis. The first axis is substantially parallel to the first side and passes through a center position of the base.
    Type: Application
    Filed: March 12, 2020
    Publication date: July 2, 2020
    Applicant: TDK CORPORATION
    Inventors: Kunihiro UEDA, Yoshimitsu WADA, Hiraku HIRABAYASHI, Kazuma YAMAWAKI, Tsuyoshi UMEHARA
  • Patent number: 10634734
    Abstract: This sensor unit includes a base having a substantially-rectangular planar shape including a first side and a second side that are substantially orthogonal to each other, and a plurality of first sensors provided on the base and arranged on a first axis. The first axis is substantially parallel to the first side and passes through a center position of the base.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: April 28, 2020
    Assignee: TDK CORPORATION
    Inventors: Kunihiro Ueda, Yoshimitsu Wada, Hiraku Hirabayashi, Kazuma Yamawaki, Tsuyoshi Umehara
  • Publication number: 20180017634
    Abstract: This sensor unit includes a base having a substantially-rectangular planar shape including a first side and a second side that are substantially orthogonal to each other, and a plurality of first sensors provided on the base and arranged on a first axis. The first axis is substantially parallel to the first side and passes through a center position of the base.
    Type: Application
    Filed: July 5, 2017
    Publication date: January 18, 2018
    Applicant: TDK CORPORATION
    Inventors: Kunihiro UEDA, Yoshimitsu WADA, Hiraku HIRABAYASHI, Kazuma YAMAWAKI, Tsuyoshi UMEHARA
  • Publication number: 20170052232
    Abstract: A magnetic sensor device that can prevent an increase in detection error even when stress is applied to a magnetic sensor chip due to heat generation or the like at the time of operation includes a magnetic sensor chip that has a nearly-square shape in a plan view, and a die pad having a mounting surface where the magnetic sensor chip is mounted. Opening portions are formed at positions where four corners of the magnetic sensor chip mounted on the mounting surface overlap, respectively. An area ratio of the opening portions to an area of the die pad is 20% or greater. Also, an area of the overlapped portions with the magnetic sensor chip and the opening portions is 40% or greater relative to the area of the opening portions in a plan view of the die pad.
    Type: Application
    Filed: June 29, 2016
    Publication date: February 23, 2017
    Inventors: Yoshimitsu WADA, Kunihiro UEDA
  • Patent number: 9372243
    Abstract: The magnetic sensor of the invention comprises a base portion, a sensor chip positioned on the base portion, a wiring portion adapted to electrically connect a terminal of the sensor chip to a connecting lead, a resin having a low elastic modulus for coating at least the sensor chip, and a resin having a high elastic modulus for coating at least the low elastic-modulus resin and the wiring portion, wherein the sensor chip includes a magneto-resistive effect device, and the low elastic-modulus resin has an elastic modulus ranging from 10 kPa to 80 MPa while the high elastic-modulus resin has an elastic modulus of 1 GPa or more, and enables the sensor chip to perform well in a good state although having a structure of sealing up the sensor chip with the resin member.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: June 21, 2016
    Assignee: TDK CORPORATION
    Inventors: Yoshimitsu Wada, Nozomu Hachisuka, Yoshihiro Kudo, Jun Ono, Nobutaka Nishio
  • Publication number: 20150054498
    Abstract: The magnetic sensor of the invention comprises a base portion, a sensor chip positioned on the base portion, a wiring portion adapted to electrically connect a terminal of the sensor chip to a connecting lead, a resin having a low elastic modulus for coating at least the sensor chip, and a resin having a high elastic modulus for coating at least the low elastic-modulus resin and the wiring portion, wherein the sensor chip includes a magneto-resistive effect device, and the low elastic-modulus resin has an elastic modulus ranging from 10 kPa to 80 MPa while the high elastic-modulus resin has an elastic modulus of 1 GPa or more, and enables the sensor chip to perform well in a good state although having a structure of sealing up the sensor chip with the resin member.
    Type: Application
    Filed: July 18, 2014
    Publication date: February 26, 2015
    Inventors: Yoshimitsu WADA, Nozomu HACHISUKA, Yoshihiro KUDO, Jun ONO, Nobutaka NISHIO
  • Patent number: 7957101
    Abstract: A suspension is provided for improving reliability in reading/writing of data by improving stiffness in a longitudinal direction of a flexure while realizing low pitch/roll stiffness of a tongue part. The suspension includes: a flexure, including two branched outrigger parts extending to the tip side of the flexure, and a tongue part for mounting a magnetic head slider, located between the outrigger parts and linked to the tip sides of the outrigger parts; a trace formed on the flexure; and a fixed part in which at least a part of a bent part formed in the trace is fixed to the tongue part.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: June 7, 2011
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Hidetoshi Matsui, Takashi Honda, Yoshimitsu Wada
  • Patent number: 7333299
    Abstract: A suspension is provided, which comprises: a flexure with elasticity for supporting a head slider having at least one head element; a first load beam having first ribs for reinforcement at both side ends of the first load beam, for supporting the flexure; and a second load beam having second ribs for reinforcement at both side ends of the second load beam, at least a part of the second load beam being overlapped with the first load beam and being fixed to the first load beam, at least a part of the first and second ribs being overlapped with each other.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: February 19, 2008
    Assignee: TDK Corporation
    Inventors: Yoshimitsu Wada, Takeshi Wada, Takashi Honda, Yoshihisa Higuchi
  • Publication number: 20070223143
    Abstract: A suspension is provided for improving reliability in reading/writing of data by improving stiffness in a longitudinal direction of a flexure while realizing low pitch/roll stiffness of a tongue part. The suspension includes: a flexure, including two branched outrigger parts extending to the tip side of the flexure, and a tongue part for mounting a magnetic head slider, located between the outrigger parts and linked to the tip sides of the outrigger parts; a trace formed on the flexure; and a fixed part in which at least a part of a bent part formed in the trace is fixed to the tongue part.
    Type: Application
    Filed: March 20, 2007
    Publication date: September 27, 2007
    Applicant: SAE MAGNETICS (H.K.) Ltd.
    Inventors: Hidetoshi MATSUI, Takashi HONDA, Yoshimitsu WADA
  • Patent number: 7141508
    Abstract: A manufacturing method of an MR thin-film magnetic head with an MR film and lead conductors overlapping each other, includes a step of depositing a conductor layer on at least the magnetoresistive effect film, a step of forming a cap layer patterned on the deposited conductor layer, and a step of dry-etching the deposited conductor layer through a mask of the patterned cap layer using an Ar gas and an O2 gas, an O2 gas or a N2 gas so as to pattern the deposited conductor film to form the lead conductors.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: November 28, 2006
    Assignee: TDK Corporation
    Inventors: Katsuya Kanakubo, Yoshimitsu Wada, Kazuhiro Hattori
  • Publication number: 20050128644
    Abstract: A suspension is provided, which comprises: a flexure with elasticity for supporting a head slider having at least one head element; a first load beam having first ribs for reinforcement at both side ends of the first load beam, for supporting the flexure; and a second load beam having second ribs for reinforcement at both side ends of the second load beam, at least a part of the second load beam being overlapped with the first load beam and being fixed to the first load beam, at least a part of the first and second ribs being overlapped with each other.
    Type: Application
    Filed: November 29, 2004
    Publication date: June 16, 2005
    Applicant: TDK CORPORATION
    Inventors: Yoshimitsu Wada, Takeshi Wada, Takashi Honda, Yoshihisa Higuchi
  • Patent number: 6665145
    Abstract: In conjunction with a so-called patterned medium including recording tracks each having an array of unit minute recording portions of a magnetic material separated by non-recording portions of a nonmagnetic material, a magnetic head slider is prevented from sticking to the medium. The magnetic recording medium includes recording tracks each having an array of unit minute recording portions of a magnetic material separated by non-recording portions of a nonmagnetic material. The surface height of the unit minute recording portions is set higher than the surface height of the non-recording portions.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: December 16, 2003
    Assignee: TDK Corporation
    Inventor: Yoshimitsu Wada
  • Publication number: 20030146186
    Abstract: A manufacturing method of an MR thin-film magnetic head with an MR film and lead conductors overlapping each other, includes a step of depositing a conductor layer on at least the magnetoresistive effect film, a step of forming a cap layer patterned on the deposited conductor layer, and a step of dry-etching the deposited conductor layer through a mask of the patterned cap layer using an Ar gas and an O2 gas, an O2 gas or a N2 gas so as to pattern the deposited conductor film to form the lead conductors.
    Type: Application
    Filed: August 7, 2002
    Publication date: August 7, 2003
    Applicant: TDK CORPORATION
    Inventors: Katsuya Kanakubo, Yoshimitsu Wada, Kazuhiro Hattori
  • Patent number: 6495240
    Abstract: In conjunction with a so-called patterned medium comprising recording tracks each having an array of unit minute recording portions of a magnetic material separated by non-recording portions of a nonmagnetic material, the invention aims to prevent the recorded information from being disrupted by contact of a magnetic head slider with the medium. The magnetic recording medium of the invention includes recording tracks each having an array of unit minute recording portions (14) of a magnetic material separated by non-recording portions (16) of a nonmagnetic material. The surface height of the unit minute recording portions (14) is set lower than the surface height of the non-recording portions (16).
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: December 17, 2002
    Assignee: TDK Corporation
    Inventors: Yoshimitsu Wada, Tsutomu Aoyama
  • Publication number: 20020135939
    Abstract: In conjunction with a so-called patterned medium comprising recording tracks each having an array of unit minute recording portions of a magnetic material separated by non-recording portions of a nonmagnetic material, the invention aims to prevent a magnetic head slider from sticking to the medium. The magnetic recording medium of the invention includes recording tracks each having an array of unit minute recording portions (14) of a magnetic material separated by non-recording portions (16) of a nonmagnetic material. The surface height of the unit minute recording portions (14) is set higher than the surface height of the non-recording portions (16).
    Type: Application
    Filed: February 9, 2000
    Publication date: September 26, 2002
    Inventor: Yoshimitsu Wada
  • Patent number: 6317294
    Abstract: The present invention is directed to a slider, a head, a head device and a read/write apparatus that are extremely effective for achieving high density writing and an increase in the storage capacity. The slider comprises a front flat surface, a first positive pressure generating portion, a second positive pressure generating portion and a first negative pressure generating portion. The front flat surface, which is provided starting at a leading edge, ends at an intermediate point along a lengthwise direction. The first and second positive pressure generating portions have flat surfaces which are essentially of equal heights and are positioned separated from each other over a distance at two sides in a widthwise direction running perpendicular to a lengthwise direction, with edges at one end located toward the leading edge forming step faces rising up from the front flat surface in a step.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: November 13, 2001
    Assignee: TDK Corporation
    Inventors: Yoshimitsu Wada, Tetsuya Roppongi, Takeshi Wada, Isamu Sato
  • Patent number: 6144529
    Abstract: The present invention is directed to a slider, a head, a head device and a read/write apparatus that are extremely effective for achieving high density writing and an increase in the storage capacity.The slider comprises a front flat surface, a first positive pressure generating portion, a second positive pressure generating portion and a first negative pressure generating portion. The front flat surface, which is provided starting at a leading edge, ends at an intermediate point along a lengthwise direction. The first and second positive pressure generating portions have flat surfaces which are essentially of equal heights and are positioned separated from each other over a distance at two sides in a widthwise direction running perpendicular to a lengthwise direction, with edges at one end located toward the leading edge forming step faces rising up from the front flat surface in a step.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: November 7, 2000
    Assignee: TDK Corporation
    Inventors: Yoshimitsu Wada, Tetsuya Roppongi, Takeshi Wada, Isamu Sato
  • Patent number: D475716
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: June 10, 2003
    Assignee: TDK Corporation
    Inventors: Yoshimitsu Wada, Tetsuya Roppongi, Takeshi Wada, Isamu Sato
  • Patent number: D489075
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: April 27, 2004
    Assignee: TDK Corporation
    Inventors: Yoshimitsu Wada, Tetsuya Roppongi, Takeshi Wada, Isamu Sato