Patents Examined by A. Heinz
  • Patent number: 8441755
    Abstract: A magnetic head includes: a main pole; a coil; a first shield having an end face that is located in a medium facing surface at a position forward of an end face of the main pole along a direction of travel of a recording medium; and a first return path section disposed forward of the main pole along the direction of travel of the recording medium. The first return path section connects part of the main pole away from the medium facing surface to the first shield so that a first space is defined. The coil includes a first portion having a planar spiral shape and wound around a core part of the first return path section. The first portion includes first and second coil elements that each extend through the first space. No part of the coil other than the first and second coil elements exists in the first space.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: May 14, 2013
    Assignees: Headway Technologies, Inc., Sae Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Atsushi Iijima
  • Patent number: 8427784
    Abstract: According to one embodiment, a magnetic head includes a head slider including a bearing surface opposed to a surface of a recording medium, an inflow end face, and an outflow end face, and configured to fly by an airflow between the recording medium surface and the bearing surface, and a recording element and a reproduction element disposed in an outflow end portion of the head slider with respect to the airflow. The bearing surface of the head slider includes a trailing step on the outflow end portion, a trailing pad on the trailing step and includes an outflow end kept at an inflow-side gap away from the outflow end face, and a first groove formed along a step portion at a boundary between the trailing step and the trailing pad.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 23, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Koji Sonoda
  • Patent number: 8416529
    Abstract: A magnetic head comprises a main pole, a return pole and a magnetic damper. The main pole is configured to emit flux and the return pole is configured to return the flux to the main pole. The magnetic damper is inductively coupled to the return pole and comprises a first conductor spaced from a first side of the return pole, a second conductor spaced from a second side of the return pole and a third conductor connecting the first conductor to the second conductor.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: April 9, 2013
    Assignee: Seagate Technology LLC
    Inventor: Steven Bruce Marshall
  • Patent number: 8405930
    Abstract: A method and system for providing a magnetic recording head is described. The magnetic recording head has an ABS configured to reside in proximity to a media during use. The magnetic recording head includes a main pole, first and second auxiliary poles, a backgap, a nonmagnetic spacer, and at least one coil. The main pole includes a pole tip occupying a portion of the ABS and a back edge distal from the ABS. Each auxiliary pole has a front recessed from the ABS and a back portion. A portion of the main pole distal from the ABS resides between the auxiliary poles. The auxiliary poles are magnetically coupled with the main pole. The backgap magnetically couples the back portions of the auxiliary poles. The nonmagnetic spacer adjoins the back edge of the main pole and is between the auxiliary poles. The coil(s) energize the main pole.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: March 26, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Zhanjie Li, Zhigang Bai, Feng Liu, Yugang Wang
  • Patent number: 8405929
    Abstract: An information storage system including an enclosure, a rotating data storage medium including a surface, a slider including an ABS and an airborne oxidizable contaminant disposed in the enclosure. The system also includes an antioxidant absorbed onto the surface of the data storage medium. The antioxidant inhibits oxidation of the oxidizable contaminants at an interface between the ABS and the rotating data storage medium.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: March 26, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Sahba Ghaderi, John Martin Burns, Charles Hignite, Vedantham Raman, Thomas Karis, Charles A. Brown
  • Patent number: 8405933
    Abstract: A disk drive suspension is provided with a load beam and a flexure. A tongue portion is formed on the flexure. The tongue portion comprises a slider mounting surface and a flat portion. A slider is mounted on the slider mounting surface. A dimple is formed on the flat portion. A tip of the dimple projects thicknesswise relative to the tongue portion toward the load beam. A protrusion is formed on a facing surface of the load beam. An end face of the protrusion projects thicknesswise relative to the load beam toward the dimple. As the tip of the dimple contacts the end face of the protrusion, the tongue portion is swingably supported on the protrusion.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: March 26, 2013
    Assignee: NHK Spring Co., Ltd.
    Inventor: Jun Soga
  • Patent number: 8395862
    Abstract: The disk drive device includes a base member, a hub, a bearing unit which is arranged on the base member and which rotatably supports the hub, and a spindle drive unit which drives the hub to rotate. The spindle drive unit includes a stator core having a salient pole, a coil wound around the salient pole and a magnet opposed to the salient pole. The hub formed of magnetic material includes an outer cylinder portion engaged with an inner circumference of a recording disk and an inner cylinder portion to which an outer circumference of the magnet is fixed. The base member having a wire hole through which a wire from the coil passes, and a concavity that is formed at a bottom surface of the base member wherein the wire passes through the wire hole along a bottom face of the base member to a wiring member at the concavity.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: March 12, 2013
    Assignee: Alphana Technology Co., Ltd.
    Inventors: Takanori Watanabe, Hiroshi Iwai, Tomoyuki Tashiro
  • Patent number: 8390953
    Abstract: The disk drive device includes a base plate, a hub on which a recording disk is mounted, a shaft bearing unit that is arranged on the base plate and that rotatably supports the hub, and a spindle drive unit that drives the hub to rotate. The spindle driving unit includes a stator core having a salient pole, a coil wound around the salient pole, and a magnet opposed to the salient pole. The hub formed of a magnetic material includes an outer cylindrical portion engaged with an inner circumference of the recording disk. A shaft is inserted into a sleeve, and the sleeve, which is of an approximate cylindrical shape, is inserted into a housing as part of the shaft bearing unit. The shaft is fixed to the rotational center of the hub, rotating along the axis together with the hub.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: March 5, 2013
    Assignee: Alphana Technology Co., Ltd.
    Inventor: Yusuke Tokunaga
  • Patent number: 8379345
    Abstract: A spindle motor includes a stationary portion and a rotating portion. The stationary portion preferably includes a shaft portion, an upper thrust portion, and an outer tubular portion. The rotating portion preferably includes an inner tubular portion, a flange portion, an upper hub annular portion, and a lower hub annular portion. The flange portion includes a communicating hole. An upper surface of a lubricating oil is located in a fifth gap defined between an upper thrust portion and an upper hub annular portion, while a lower surface of the lubricating oil is located in a sixth gap defined between an outer tubular portion and a lower hub annular portion. The communicating hole and a space extending from the fifth gap to the sixth gap through a fourth gap, a first gap, a second gap, and a third gap are continuously filled with the lubricating oil.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: February 19, 2013
    Assignee: Nidec Corporation
    Inventors: Junya Mizukami, Takayuki Oe, Yoichi Sekii, Naoki Sabashi, Hideki Nishimura, Takehito Tamaoka, Takashi Yamamoto
  • Patent number: 8379352
    Abstract: A “thermagnonic” spin-torque oscillator (STO) uses heat flow alone to cause the spin-torque (ST) effect and generate the persistent oscillation of the free layer magnetization. In addition to the conventional free and reference layers, the thermagnonic STO also includes a magnetic oxide layer having a fixed in-plane magnetization, a ferromagnetic metallic layer on one surface of the magnetic oxide layer, a nonmagnetic electrically conductive layer between the free layer and the metallic layer, and an electrically resistive heater on the other surface of the magnetic oxide layer. Due to the thermagnonic effect, heat flow from the magnetic oxide layer through the metallic layer, conductive layer and free layer ultimately results in a spin transfer torque (STT) to the free layer. Electrical sense current flowing in the opposite direction as the heat flow is used to monitor the frequency of oscillation of the free layer magnetization.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: February 19, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Patrick Mesquita Braganca, Bruce Alvin Gurney
  • Patent number: 8373940
    Abstract: According to one embodiment, a magnetic head for recording magnetic data by changing the magnetization direction of a magnetic recording layer of a magnetic medium comprises a magnetic pole for generating a magnetic field to change the magnetization direction of the magnetic recording layer, and a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layer to assist the change of the magnetization direction of the magnetic recording layer caused by the magnetic field from the magnetic pole. Other embodiments are also presented.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: February 12, 2013
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yohji Maruyama, Nobumasa Nishiyama, Masafumi Mochizuki
  • Patent number: 8369046
    Abstract: In a disk drive suspension including a baseplate, a load beam, and a flexure, the suspension comprises a recess formed in one surface of the load beam relative to the thickness thereof, a damping material contained in the recess, and a lid portion superposed on the damping material so as to cover at least a part of the recess. The lid portion is formed of a part of a flexure. The flexure is an example of a suspension constituent member.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: February 5, 2013
    Assignee: NHK Spring Co., Ltd.
    Inventor: Akira Nojima
  • Patent number: 8358487
    Abstract: A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, and a thin-film coil are laminated on a substrate. The thin-film coil has a coil-layer. The coil-layer has a turn part arranged closer to an ABS than is a rear end part of the main magnetic pole layer farthest from the ABS. Regarding a substrate side coil-layer, arranged between the main magnetic pole layer and the substrate, of the coil-layer, a thickness of a non-corresponding magnetic pole part other than a magnetic pole corresponding part corresponding to an arrangement space of the main magnetic pole layer is larger than a thickness of the magnetic pole corresponding part.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: January 22, 2013
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Atsushi Iijima
  • Patent number: 8351160
    Abstract: First and second piezoelectric element overlapped portions of an insulating layer of a flexure part is formed with first and second connecting openings, respectively. There are provided on an upper surface of the insulating layer, first and second lower conductive adhesive agents that electrically connect lower electrode layers of first and second piezoelectric elements to a voltage supply wiring through the first and second connecting openings, and a surrounding insulative adhesive agent that is arranged so as to surround the first and second lower conductive adhesive agents in a plan view.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: January 8, 2013
    Assignee: Suncall Corporation
    Inventor: Yasuo Fujimoto
  • Patent number: 8351152
    Abstract: A system according to one embodiment includes a first portion comprising at least a portion of a coil structure and at least a portion of a magnetic yoke, the first portion being oriented at an angle of greater than 0° and less than 90° relative to a substantially planar portion of an underlying substrate; a first pole; a second pole; and a write gap, a portion of the write gap having a plane of deposition oriented about perpendicular to a final media-facing surface of the write gap.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: January 8, 2013
    Assignee: International Business Machines Corporation
    Inventors: Philipp Herget, Pierre-Oliver Jubert
  • Patent number: 8351148
    Abstract: To provide a magnetic tape library device with which a plurality of housed magazines can be extracted safely from the device with the same operation, while the device is made to be simple. The magnetic tape library device includes: a plurality of magazines for housing a plurality of magnetic tape cartridges inside thereof; a device main body for housing the magazines within a same plane in a freely movable manner and in series in an inserting/extracting direction from an inserting/extracting slot; a connecting mechanism for enabling the plurality of magazines to be connected with each other or to be released by a releasing operation from outside; and a locking mechanism for enabling at least the magazine on the back side of the inserting/extracting direction of the device main body, among the plurality of magazines, to be locked or to be released from the locked state at the inserting/extracting slot side.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: January 8, 2013
    Assignee: NEC Corporation
    Inventor: Hiroaki Ishii
  • Patent number: 8345382
    Abstract: A magnetic head includes a coil, a main pole, a gap part, a write shield, and a return path section. The return path section includes a yoke part with a first coupling layer connected to the write shield and a second coupling layer magnetically coupling the first coupling layer to the yoke part. The second coupling layer has an end face facing toward a medium facing surface and located away from the medium facing surface. The coil includes i) a first coil element disposed with the first coupling layer interposed between the medium facing surface and the first coil element and ii) a plurality of second coil elements aligned perpendicularly to the medium facing surface and disposed with the second coupling layer interposed between the medium facing surface and the second coil elements. The first coil element being interposed between the main pole and the second coil elements.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: January 1, 2013
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Atsushi Iijima
  • Patent number: 8345377
    Abstract: An aerodynamic device for aerostatic sealing in a hard disk drive (HDD) including an exterior surface configured to modify airflow in the HDD and proximate at least one magnetic disk and an inlet port configured to receive pressurized airflow. The aerodynamic device also includes a plurality of outlet ports disposed on the exterior surface configured to discharge the pressurized airflow directly onto the at least one magnetic disk and aerostatically seal the aerodynamic device with the at least one magnetic disk.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: January 1, 2013
    Assignee: HGST, Netherlands B.V.
    Inventor: Ferdinand Hendriks
  • Patent number: 8345389
    Abstract: A magnetoresistive element includes a first ferromagnetic layer, a second ferromagnetic layer, a nonmagnetic layer, a first metal layer, a second metal layer, a first electrode, and a second electrode. The nonmagnetic layer is provided between the first ferromagnetic layer and the second ferromagnetic layer. The first metal layer includes Au and is provided so that the first ferromagnetic layer is sandwiched between the nonmagnetic layer and the first metal layer. The second metal layer includes a CuNi alloy, and is provided so that the first metal layer is sandwiched between the first ferromagnetic layer and the second metal layer. In addition, magnetization of either one of the first ferromagnetic layer and the second ferromagnetic layer is fixed in a direction. Magnetization of the other is variable in response to an external field. At least one of the first ferromagnetic layer and the second ferromagnetic layer includes a half metal.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: January 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiromi Yuasa, Shuichi Murakami, Yoshihiko Fuji, Hideaki Fukuzawa
  • Patent number: 8345378
    Abstract: An air pump for generating air pressure in a hard disk drive (HDD) including a rotor disposed inside the HDD. The rotor comprises a first air pressure generating feature. The air pump further includes a stator. The stator includes a second air pressure generating feature. The first air pressure generating feature corresponds with the second air pressure generating feature and the air pressure is generated at a location where the first air pressure generating feature rotates in proximity to the second air pressure generating feature.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: January 1, 2013
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventor: Ferdinand Hendriks