Protective Structure Patents (Class 360/125.72)
  • Patent number: 9036301
    Abstract: A slider includes a substrate having a trailing edge, a leading edge opposite the trailing edge, and an air bearing surface connecting the trailing edge with the leading edge; a read/write transducer formed at the trailing edge; and a coat layer attached on the trailing edge and covering on the read/write transducer. The slider further includes a protection layer for shielding the read/write transducer thereby preventing the read/write transducer from damaging during a laser soldering process. The present invention can prevent the read/write transducer from damaging during the laser bonding process and, in turn improve the reading and writing performance of the slider. The invention also discloses an HGA and a disk drive unit.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: May 19, 2015
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Shen kuang sidney Chou, Chi hung Yuen, Yan bin Wang, Li ping Peng, Lu Xiao
  • Publication number: 20150103441
    Abstract: A magnetic storage system according to one embodiment includes a magnetic head having a removable organic coating thereon in an amount sufficient for reducing exposure of the head to oxidation promoting materials. A kit according to one embodiment includes a drive having a magnetic head, and a tape having an applicator portion for applying an organic coating to the magnetic head for reducing exposure of the head to oxidation promoting materials.
    Type: Application
    Filed: December 18, 2014
    Publication date: April 16, 2015
    Inventors: Richard L. Bradshaw, Icko Eric Timothy Iben, Wayne A. McKinley, Lee C. Randall
  • Patent number: 9007718
    Abstract: A magnetic write head with a flux opposing structure for opposing stray flux from an external source. The write head includes a yoke with two poles and a non-magnetic gap formed there between, and functions to write data to a magnetic storage medium. The flux opposing structure is proximate to the first pole and has a separation from an exterior surface of the first pole. A current applied to the secondary coil to create a secondary flux field with an opposite polarity of a first magnetic flux. The secondary flux field opposes the stray flux associated with the primary flux field of the magnetic write head and/or a neighboring magnetic write head.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: April 14, 2015
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Philipp Herget
  • Patent number: 8837081
    Abstract: A method and system provide a touchdown sensor for use in disk drive. The touchdown sensor includes a sensor layer including a plurality of magnetic layers interleaved with at least one nonmagnetic layer. The plurality of magnetic layers are magnetically coupled and single domain. Further, the sensor has a temperature coefficient of resistivity (TCR) of at least 0.15%/° C.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: September 16, 2014
    Assignee: Western Digital (Fremont), LLC
    Inventors: Chengtao R. Yu, Dehua Han, Ying Hong, Feng Liu, Laurence L. Chen, Zhanjie Li, Zhigang Bai, Yu Lo, Yunfei Ding
  • Patent number: 8537496
    Abstract: A perpendicular magnetic write head having improved Bit Error Rate (BER), Adjacent Track Interference (ATI) and Far Track Interference (FTI). The write head includes a write pole and a trailing wrap-around magnetic shield. A permanent magnetic is located at either outer side of the shield. These magnets are magnetized to have magnetizations that are oriented in the same direction, in a direction that is perpendicular to the track direction and parallel with the air bearing surface.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: September 17, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Zhihao Li, Xiaodong Che, Zhen Jin, Yansheng Luo
  • Patent number: 8295007
    Abstract: A magnetic tape head includes a writing element having a coil for generating magnetic flux and a yoke part that emits magnetic flux induced by the coil from a tape bearing surface opposite a magnetic tape, a substrate where the writing element is formed, and a closure joined with the substrate. A gap formed at a portion between the substrate and the closure exists from the yoke part in a direction orthogonal to a junction surface between the substrate and the closure.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: October 23, 2012
    Assignee: TDK Corporation
    Inventor: Yuji Ito
  • Patent number: 8213117
    Abstract: A magnetic head includes a reproducing element for reproducing information recorded on a magnetic recording medium, a recording element for recording information on the magnetic recording medium, and a heating resistor. The magnetic head has a magnetic medium-facing surface on which the reproducing element and the recording element are exposed.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: July 3, 2012
    Assignee: TDK Corporation
    Inventors: Yosuke Antoku, Norio Takahashi, Katsuki Kurihara
  • Patent number: 8004795
    Abstract: Methods and structures for the fabrication of a thin film, longitudinal and perpendicular recording heads are disclosed. The heads comprise a plurality of embedded static dissipative layers that extend a few nanometers from the air bearing surface. These extended layers are first to contact the magnetic media surface and drain any electric charge buildup before a damaging discharge occurs with read or write head components. The embedded static dissipative layers are particularly useful for use in heads utilizing thermal fly height control systems, which tend to increase the probability of damaging electrical discharge through critical head components.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: August 23, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Albert John Wallash, Hong Zhu
  • Patent number: 7764466
    Abstract: A thin-film magnetic head where the closure is bonded with sufficiently high adhesive strength by the adhesive layer thinner than conventional and that is free from the problem of fine dusts, is provided. The head comprises: a substrate having an element-formed surface and an opposed-to-medium surface; at least one magnetic head element provided on/above the element-formed surface; an overcoat layer formed on the element-formed surface; an etching pattern formed on a part of an upper surface of the overcoat layer, the whole or a part of the etching pattern being filled up by adhesive; a closure provided on the etching pattern of the overcoat layer; and an opening portion formed close to an edge on the opposite side to the opposed-to-medium surface of an adhesive surface of the closure, being a portion exposed from the closure of the etching pattern.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: July 27, 2010
    Assignee: TDK Corporation
    Inventors: Mitsuyoshi Kawai, Tomonaga Nishikawa, Tsutomu Chikamatsu, Makoto Yoshida
  • Patent number: 7751146
    Abstract: Aggressive (i.e. tight tolerance) stitching offers several advantages for magnetic write heads but at the cost of some losses during pole trimming. This problem has been overcome by replacing the alumina filler layer, that is used to protect the stitched pole during trimming, with a layer of electro-plated material. Because of the superior step coverage associated with the plating method of deposition, pole trimming can then proceed without the introduction of stresses to the stitched pole while it is being trimmed.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: July 6, 2010
    Assignee: Headway Technologies, Inc.
    Inventors: Cherng-Chyi Han, Mao-Min Chen, Laurie Lauchlan, Lei Zhang
  • Patent number: 7616403
    Abstract: Embodiments of the present invention are directed to structures of a recording head having a winged design for reducing corner stray magnetic fields. In one embodiment, the present invention comprises a magnetic recording head comprising a plurality of components. In embodiments of the present invention at least one of the plurality of components comprises a surface exposed to an air bearing surface when in operation with a recording medium. The surface exposed to the air bearing surface comprises notched edges for constraining corner stray magnetic fields associated therewith.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: November 10, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kuok San Ho, Yimin Hsu, Masafumi Mochizuki, Ching Hwa Tsang, Roger Wood
  • Patent number: 7463450
    Abstract: A thin film magnetic head has a configuration in which a main magnetic pole film having a magnetic pole end portion on a medium opposing surface (ABS) side facing a magnetic disk, a write shield film facing the magnetic pole end portion so as to form a recording gap film on the medium opposing surface side, and a thin film coil wound around at least a part of the write shield film are laminated. Further, the thin film magnetic head has an upper yoke magnetic pole film whose size is larger than that of the main magnetic pole film at a part more distant from the ABS than the recording gap film, and this upper yoke magnetic pole film is bonded to the side of the main magnetic pole film close to the thin film coil. In the upper yoke magnetic pole film, an end portion on the ABS side is retracted in a direction apart from the ABS in accordance with an increase in film thickness which is measured from the surface of the main magnetic pole film.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: December 9, 2008
    Assignees: Headweay Technologies, Inc., Sae Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Takehiro Kamigama, Tatsushi Shimizu