Multilayered Winding Patents (Class 29/603.24)
  • Patent number: 8826515
    Abstract: A write head includes a first pole P1, a P1 pedestal, a first back gap layer plated on top of the first pole P1 leaving a region between the P1 pedestal and the first back gap layer for plating a coil. Further, a first insulation layer is applied on top of the P1 pedestal and the first back gap layer and the region between the P1 pedestal and the first back gap layer. The write head further includes a coil, patterned at least partially on top of the P1 pedestal and the first back gap layer and the region between the P1 pedestal and the first back gap layer, copper plated in the coil patterns, and a second insulation layer is applied to fill the spaces in between the coil turns. The resulting structure is planarized via chemical mechanical polishing.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: September 9, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Terence Tin-Lok Lam, David Kaimon Lee, Edward Hin Pong Lee, Changqing Shi
  • Patent number: 8448330
    Abstract: A manufacturing method for a thin-film magnetic head including first and second magnetic layers, a gap layer, a thin-film coil, and a coil insulating layer for insulating neighboring ones of turns of the thin-film coil. The manufacturing method includes the steps of: forming the first magnetic layer; forming the gap layer on the first magnetic layer; forming the second magnetic layer on the gap layer; forming the thin-film coil; and forming the coil insulating layer. The coil insulating layer is formed by stacking a plurality of insulating films formed by chemical vapor deposition.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: May 28, 2013
    Assignee: TDK Corporation
    Inventors: Yoshitaka Sasaki, Tohru Inoue
  • Patent number: 8371020
    Abstract: A plurality of shaped wires, which are obtained by shaping electric wires, are assembled to form a wire assembly 47. The wire assembly 47 is then rolled around a core member 6 with aligning members 7 being inserted into spaces 472 formed between adjacent ones of straight superposed parts 471 of the wire assembly 47.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: February 12, 2013
    Assignee: Denso Corporation
    Inventors: Tetsuya Gorohata, Keigo Moriguchi, Akito Akimoto, Masahiro Takada, Masaomi Dobashi, Youichi Kamakura, Shuzo Muraki, Atsuo Ishizuka
  • Patent number: 8302286
    Abstract: A stator winding is manufactured by a forming step, a winding step, and a expanding step. In the forming step, an S-shaped offset shape is formed on a conductor part corresponding to a coil end part. Thereby, in a coil end part, it is possible to provide an expected shape stably at the coil end part. The conductor is wound around a bobbin in the winding step. In the winding step, a twisted shape is given to the conductor parts to be the inclined part of the coil end and the conductor part to be accommodated in a slot. In the expanding step, a preform product removed from the bobbin is expanded into a shape of the stator winding.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: November 6, 2012
    Assignee: Denso Corporation
    Inventor: Takashi Tokizawa
  • Patent number: 8256105
    Abstract: An apparatus and method are disclosed that may include a contact pin; and a plurality of loops of conductive wire, coated with insulation material, disposed in proximity to the contact pin, wherein along at least one portion of the conductive wire, at least one edge of the contact pin extends through the insulation material and thereby forms conductive electrical contact with the conductive wire.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: September 4, 2012
    Inventor: Anthony Freakes
  • Patent number: 8196286
    Abstract: A coil-holding assembly for an electrical machine has coil holders made of plastic and on which coils of a stator can be wound. The coil holders are formed and pivotal on an outer edge of a planar central plastic support by integral film hinges between a winding position parallel to a plane of the support and a bent-up position perpendicular to the plane. Thus the coils can be wound on the holders in the parallel position thereof and the holders are then moved into the bent-up position for use in the electric machine.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: June 12, 2012
    Assignee: Wilo AG
    Inventors: Thomas Materne, Guenter Strelow, Uwe Dreihaus, Stephan Hoheisel
  • Patent number: 8166628
    Abstract: In manufacturing a stator coil for rotary electric machine having phase windings, plural conductive shaped wire members are integrated mutually to form an integrated body. Each shaped wire member has plural straight portions and plural turn portions alternately connecting adjacent straight portions at each of both ends of each straight portion. The body has plural straight superposed portions each formed by mutually superposing the plural straight portions. A wound-up body has plural straight stack portions The straight portions are fitted to respective fitting grooves of an alignment member, the fitting grooves being formed in the alignment member at intervals each corresponding to the size of a gap between adjacent straight stack portions. The integrated body is wound about a core member together with the alignment member, with the straight portions being fitted to the alignment member to form the wound-up body.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: May 1, 2012
    Assignee: Denso Corporation
    Inventors: Akito Akimoto, Yoshinobu Yanagisawa, Shuzo Muraki, Masaomi Dobashi, Kentaro Mitsuki, Atsuo Ishizuka
  • Patent number: 8056215
    Abstract: A first tool set holds a wire covered with an insulation film at a bending point of the wire to protrude the wire from the first tool set. A second tool set holds the protruded portion of the wire. The second tool set is rotated about the first tool set to bend the wire along a wall of the first tool set and to form a boundary corner in the wire at the same radius of curvature as the wall. The wire is released from the second tool set and is moved to place the first tool set at another bending point while protruding from the first tool set. The second tool set is placed at the protruded portion of the wire. When the wire is bent at a predetermined number of bending points and is rounded, a stator coil formed in a corrugated shape is manufactured.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: November 15, 2011
    Assignee: Denso Corporation
    Inventors: Masahiro Takada, Kuniharu Teshima, Hideji Shimaoka, Toshiaki Oohara
  • Patent number: 8035921
    Abstract: A perpendicular magnetic recording head includes a main pole, a return yoke forming a magnetic path with the main pole, and a coil encompassing the main pole in a solenoid structure to allow the main pole to generate a magnetic field that records information on a recording medium is provided. When a side of the main pole toward the return yoke is an upper portion of the main pole and a side of the main pole opposite to the return yoke is a lower portion of the main pole, the coil includes a lower wire portion passing through the lower portion of the main pole, an upper wire portion passing through the upper portion of the main pole, and a connection portion electrically connecting the lower wire portion and the upper wire portion, and the upper wire portion includes an upper wire layer having at least two layers. The structure may improve a high frequency recording characteristics required for achieving a high recording density.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: October 11, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kook-hyun Sunwoo
  • Patent number: 7905008
    Abstract: There is provided a method of manufacturing a coil component, where a first insulation layer is formed on a first magnetic substrate, an insulation film is formed on the first insulation layer, a coil conductor is formed on the insulation film, another insulation film is formed on the coil conductor, and an open region is formed on the inner circumference side and on the outer circumference side of the coil conductor. A magnetic later is embedded, at least partially, in the open region, and a second magnetic substrate is secured on the magnetic layer. Also, a plurality of electrode terminals are formed, where one of the electrode terminals is connected to a terminal portion of the coil conductor, and the electrode terminals are provided across sides of the first and second magnetic substrates. Therefore, the first insulation layer can suitably prevent shorting failures between the electrode terminals.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: March 15, 2011
    Assignee: TDK Corporation
    Inventors: Makoto Yoshida, Nobuyuki Okuzawa, Tomokazu Ito, Takashi Kudo, Makoto Otomo, Akira Sato
  • Patent number: 7770286
    Abstract: A manufacturing method of a winding assembly of a rotating electrical machine using a rotation block and a fixed block and a manufacturing apparatus used for the same. The rotation block includes a rotation surface rotatable around a rotation axis, and the fixed block includes a first surface and a second surface opposite to each other and a shaping surface. The shaping surface is formed between end parts of the first and the second surfaces, is made to have an almost semicircular shape with the rotation axis as the center, and extends along the rotation axis. Plural wire rods are simultaneously fed from the first surface of the fixed block to the rotation surface of the rotation block, and the wire rods positioned on the rotation surface are bent by rotation of the rotation block.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: August 10, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Hirota, Norihiro Murata, Toshiaki Kashihara
  • Patent number: 7657992
    Abstract: A method of making a perpendicular magnetic recording (PMR) head with single or double coil layers and with a small write shield stitched onto a main write shield. The stitched shield allows the main write pole to produce a vertical write field with sharp vertical gradients that is reduced on both sides of the write pole so that adjacent track erasures are eliminated. From a fabrication point of view, both the main pole and the stitched shield are defined and formed using a single photolithographic process, a trim mask and CMP lapping process so that the main shield can be stitched onto a self-aligned main pole and stitched shield.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: February 9, 2010
    Assignee: Headway Technologies, Inc.
    Inventors: Cherng-Chyi Han, Kenichi Takano
  • Patent number: 7631418
    Abstract: A manufacturing process is provided where 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 electroplated 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: December 15, 2009
    Assignee: Headway Technologies, Inc.
    Inventors: Cherng-Chyi Han, Mao-Min Chen, Laurie Lauchlan, Lei Zhang
  • Patent number: 7624493
    Abstract: There are proposed a manufacturing method of a winding assembly of a rotating electrical machine using a rotation block and a fixed block and a manufacturing apparatus used for the same. The rotation block includes a rotation surface rotatable around a rotation axis, and the fixed block includes a first surface and a second surface opposite to each other and a shaping surface. The shaping surface is formed between end parts of the first and the second surfaces, is made to have an almost semicircular shape with the rotation axis as the center, and extends along the rotation axis. Plural wire rods are simultaneously fed from the first surface of the fixed block to the rotation surface of the rotation block, and the wire rods positioned on the rotation surface are bent by rotation of the rotation block.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: December 1, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Hirota, Norihiro Murata, Toshiaki Kashihara
  • Patent number: 7549216
    Abstract: The invention is directed to a method for manufacturing a thin film magnetic head comprising forming a first coil, a first pole piece and a first back gap piece on a first insulating film formed on a surface of a first magnetic film, so that the first coil, the first pole piece and the first back gap piece have a taper angle making a sectional shape wider in a lower part and narrower in an upper part; forming a second insulating film on surfaces of the first coil, the first pole piece and the first back gap piece; forming a first seed film on the second insulating film; growing a first plating film for a second coil on the first seed film in an area where the second coil is to be formed, so that the first plating film fills up spaces between the first pole piece and an outermost coil turn of the first coil, between coil turns of the first coil, and between an innermost coil turn of the first coil and the first back gap piece; and flattening the first plating film by polishing, so that to obtain a pattern of t
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: June 23, 2009
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Takehiro Kamigama, Hiroyuki Itoh
  • Patent number: 7526857
    Abstract: A method of manufacturing a thin-film magnetic head including the step of forming a thin-film coil. The step of forming the thin-film coil forms: a flat first coil of a single turn; a flat second coil of two turns arranged to sandwich the first coil from inner and outer sides thereof; a flat third coil of a single turn located above the first and second coils; and a flat fourth coil of two turns arranged to sandwich the third coil from inner and outer sides thereof. The first and fourth coils are connected in series to constitute a first three-turn coil. The second and third coils are connected in series to constitute a second three-turn coil. The first three-turn coil and the second three-turn coil are connected in series.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: May 5, 2009
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Takehiro Kamigama
  • Patent number: 7428776
    Abstract: A method of manufacturing a thin-film coil in which a first coil and a second coil each having a desired number of winding are electrically connected in series and the second coil is formed between winding portions of the first coil on substantially the same plane, comprising: forming the first coil having a predetermined number of windings via a first insulating film; forming a second insulating film on a surface of the first coil and between the winding portions of the first coil; forming an underlying conductive film on the second insulating film, and treating the underlying conductive film so as to leave only the bottom portions of the underlying conducting film between the winding portions of the first coil; and growing deposition originating from a remaing portion of the underlying conductive film on the bottom portions of the underlying conducting film between the winding portions of the first coil so as to form the second coil.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: September 30, 2008
    Assignee: Sony Corporation
    Inventor: Teruo Inaguma
  • Patent number: 7370403
    Abstract: Within a method for fabricating an inductor structure there is first provided a substrate. There is then formed over the substrate a planar spiral conductor layer to form a planar spiral inductor, wherein a successive series of spirals within the planar spiral conductor layer is formed with a variation in at least one of: (1) a series of linewidths of the successive series of spirals; and (2) a series of spacings of the successive series of spirals. The method contemplates a planar spiral inductor structure fabricated in accord with the method. A planar spiral inductor structure fabricated in accord with the method is characterized by an enhanced Q value of the planar spiral inductor structure.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: May 13, 2008
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Hun-Ming Hsu, Yen-Shih Ho
  • Patent number: 7360303
    Abstract: There are proposed a manufacturing method of a winding assembly of a rotating electrical machine using a rotation block and a fixed block and a manufacturing apparatus used for the same. The rotation block includes a rotation surface rotatable around a rotation axis, and the fixed block includes a first surface and a second surface opposite to each other and a shaping surface. The shaping surface is formed between end parts of the first and the second surfaces, is made to have an almost semicircular shape with the rotation axis as the center, and extends along the rotation axis. Plural wire rods are simultaneously fed from the first surface of the fixed block to the rotation surface of the rotation block, and the wire rods positioned on the rotation surface are bent by rotation of the rotation block.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: April 22, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yutaka Hirota, Norihiro Murata, Toshiaki Kashihara
  • Patent number: 7346978
    Abstract: A method for manufacturing a thin film magnetic head comprises forming a first magnetic core extending from a surface facing a recording medium in a height direction. The method further comprises forming first coil pieces from a first conductive material on the coil insulating underlayer at a side of the surface facing the recording medium with respect to the connecting region, and simultaneously forming a first metal layer from said first conductive material on the first magnetic core in the back region located from the connecting region in the height direction. The method also comprises forming a coil insulating layer for covering the first coil pieces, and forming the second magnetic core above the first magnetic core.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: March 25, 2008
    Assignee: Alps Electric Co., Ltd
    Inventor: Kiyoshi Sato
  • Patent number: 7322097
    Abstract: The induction coil of the magnetic head of the present invention is fabricated in a patterned electrical insulation material, preferably utilizing reactive ion etch (RIE) techniques. The electrical insulation material is particularly patterned such that it is formed away from the ABS surface and in the location of the induction coil. A fill layer is deposited around the patterned electrical insulation material layer, such that the fill layer is disposed at the ABS surface. In a preferred embodiment, the patterned electrical insulation material is initially fabricated from hard baked photoresist and subsequent to the deposition of the fill layer the hard baked photoresist material is removed and replaced by SiO2. The SiO2 is thereby located away from the ABS surface and the induction coil is subsequently fabricated within the SiO2 material.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: January 29, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Richard Hsiao, Edward Hin Pong Lee
  • Patent number: 7243411
    Abstract: A method for protecting a write head coil during write pole notching using ion mill resistant mask formed by reactive ion etching is disclosed. Ion mill shaping of the write pole is performed after depositing an ion mill-resistant material to protect the coil.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: July 17, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: David P. Druist, Aron Pentek
  • Patent number: 7194798
    Abstract: Methods suitable for use in making a write coil of a magnetic head includes the steps of forming a seed layer made of ruthenium (Ru) over a substrate; forming, over the seed layer, a patterned resist having a plurality of write coil trenches patterned therein; electroplating electrically conductive materials within the plurality of write coil trenches to thereby form a plurality of write coil layers; removing the patterned resist; and performing a reactive ion etch (RIE) in ozone gas (O3) for removing exposed seed layer materials in between the plurality of write coil layers. Advantageously, the write coil layers remain undamaged from the RIE in the ozone gas. Other structures may be fabricated in a similar manner.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: March 27, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Christian René Bonhôte, Quang Le
  • Patent number: 7168156
    Abstract: A thin-film magnetic head comprises first and second magnetic pole groups, magnetically connected to each other, having respective magnetic pole parts opposing each other on a side of a medium-opposing surface; a recording gap layer formed between the magnetic pole parts; and a thin-film coil insulated from the first and second magnetic pole groups and helically wound about at least one of them; which are laminated on a substrate. The thin-film coil comprises a first conductor group having a plurality of inner conductor parts disposed between the first and second magnetic pole groups, a second conductor group having a plurality of outer conductor parts disposed outside the second magnetic pole group, and a connecting part group having a plurality of connecting parts for connecting the inner conductor parts to the outer conductor parts.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: January 30, 2007
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Takehiro Kamigama
  • Patent number: 7146714
    Abstract: A method of manufacturing a digital magneto-optical signal write/read head including a thin-film in-plane magnetic coil disposed on an outwardly directed surface of a coil substrate. Coil lead in and coil lead out sections of the coil are extended to an interconnection part of the side surface of the coil substrate and first and second spaced interconnecting conductors are deposited on the side surface of the coil substrate in electrical connection with the lead in and lead out sections of the magnetic coil for contacting the external lead in and lead out lines. Alternatively first and second contacting conductors may additionally be deposited on a top surface of the coil substrate in electrical connection with the first and second interconnecting conductors on the side surface of the coil substrate for contacting the said external lead in and lead out lines.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: December 12, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Frank Cornelis Penning
  • Patent number: 7117583
    Abstract: A method and apparatus using a pre-patterned seed layer for providing an aligned coil for an inductive head structure. The method uses an aligned process where the base plate imprint is fabricated on an electrically insulating layer and the reversed image is fabricated and etched into the coil insulation material, e.g., hard bake photoresist to alleviate the problems associated with complete ion removal of the seed layer between high aspect ratio coils. The method would also not be prone to plating non-uniformities (voids), and would not be subject to seed layer undercutting in a wet etch step process.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: October 10, 2006
    Assignee: International Business Machines Corporation
    Inventors: Thomas Edward Dinan, Jeffrey S. Lille, Son Van Nguyen, Hugo Alberto Emilio Santini
  • Patent number: 7111387
    Abstract: A method of manufacturing a thin film magnetic head comprising an insulating layer provided between a core and a coil is provided. Also provided is a method for forming an inorganic insulation underlying layer and an organic insulation underlying layer on a lower core layer behind a recording region. The withstand voltage between the lower core layer and the coil layer can be improved because a coil is formed on the organic insulation underlying layer with an inorganic insulation layer disposed on the organic insulation layer.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: September 26, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Patent number: 7111384
    Abstract: A method for manufacturing a magnetic recording head includes the steps of forming a first lifting layer and a second lifting layer on a bottom core layer, forming an inorganic insulating layer in a gap between the first lifting layer and the second lifting layer, forming a groove in the inorganic insulating layer to form a coil layer, and forming the coil layer in the groove and over the groove by plating.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: September 26, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Minoru Yamada
  • Patent number: 7107666
    Abstract: An ultra-miniature magnetic device generally comprises a conductive winding and a magnetic core. The conductive winding includes an upper conductor and a lower conductor. The magnetic core is of an elongate rectangular or oval shape having two elongate sections and two short sections. The lower conductor is preferably positioned below the elongate sections of the magnetic core while the upper conductor is preferably positioned above the elongate sections of the magnetic core. The lower and upper conductors are electrically connected by conducting via structures that are formed in sequential steps using semiconductor processing technology. The result is a coil winding around the elongate sections, with the short sections being preferably free of windings. The process provides an advantage of avoiding shorting between the via structures and the magnetic core caused by overetching when etching the via holes.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: September 19, 2006
    Assignee: BH Electronics
    Inventors: Fred C. Hiatt, John E. DeCramer, Robert T. Fayfield, Richard J. Rassel
  • Patent number: 7089651
    Abstract: A method for forming at least two layers of electrical coils and their supportive resistive layers for a magnetic write head having an ultra-short yoke so that the second and any additional coil layers are formed on flat resistive surfaces to eliminate problems associated with inter- and intra-layer shorting and with shorting between coil and yoke. The resistive layers are formed with flat surfaces and desired apex angles by using a novel two-step photoresist scheme in which a layer of photoresist is first photoexposed and developed, then photoexposed a second time to cure a surface region that will remain flat during a final low temperature curing process.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: August 15, 2006
    Assignee: Headway Technologies, Inc.
    Inventors: Yi Zheng, Yi-Chun Liu
  • Patent number: 6977796
    Abstract: A bottom track pole is formed on a surface of a bottom pole, a thin film coil is formed on the bottom pole to form a flat coplanar surface with the bottom track pole, a write gap film is formed on the flat coplanar surface, first and second magnetic material films constituting a top pole are formed on a flat surface of the thin film coil, and the second magnetic material film, first magnetic material film, write gap film and bottom track pole are partially removed by RIE to form a top track pole and trim structure in a self-aligned manner. The thin film coil is formed by a first thin film coil half and a second thin film coil half having coil windings which are formed in a self-aligned manner between successive coil windings of the first thin film coil half and have a two-layer structure of a first conductive film at least a part of which is formed by CVD and a second conductive film formed by electrolytic plating.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: December 20, 2005
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.), Ltd.
    Inventors: Yoshitaka Sasaki, Takehiro Kamigama
  • Patent number: 6868600
    Abstract: A method of manufacturing a thin film magnetic head having superior overwrite characteristics as well as an extremely small pole width is disclosed. The thin film magnetic head has a thin film coil provided in a recess region of a bottom pole. This makes it possible to appropriately ensure a thickness of the thin film coil, as well as to reduce a thickness of a second pole tip portion, and therefore it is possible to ensure superior overwrite characteristics, as well as to form the second pole tip portion having an extremely small uniform width. The method of manufacturing a thin film magnetic head forms a recess region in a second magnetic layer close to a first magnetic layer, and forms a first thin film coil for constituting a part of the thin film coil in the recess region.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: March 22, 2005
    Assignee: TDK Corporation
    Inventor: Yoshitaka Sasaki
  • Patent number: 6804879
    Abstract: A method for producing a magnetic transducer with a inductive write head having a multilayer coil with a high aspect ratio and a short yoke is provided. A damascene process is used for two coil layers and a conventional process for the third coil layer. The process of the invention allows a seed layer for the coil to be deposited on the side walls of the trenches for the first and second coil layers. In one embodiment the seed layer for the coil is preceded by an adhesion layer.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: October 19, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Richard D. Hsiao, Quang Le, Edward Hin Pong Lee, Paul Phong Nguyen, Son Van Nguyen, Denny D. Tang, Bradley Douglas Webb, Patrick Rush Webb, Samuel Wei-san Yuan
  • Patent number: 6785955
    Abstract: A method and system for providing a writer is disclosed. The method and system include providing a first pole, an insulator covering a portion of the first pole and a coil on the first insulator. The coil includes a plurality of turns. The method and system also include providing a second insulator covering the coil, providing a second pole on the second insulator and providing a write gap separating a portion of the first pole from a second portion of the second pole. A first portion of the second pole is coupled with the first pole. In one aspect, the method and system include providing a coil having a plurality of turns with a pitch of no more than 1.2 micrometers. In another aspect, the plurality of turns of the coil is provided using a hard mask layer on a photoresist layer. A portion of the hard mask layer and a portion of the photoresist layer define a plurality of spaces between the pluralities of turns of the coil. In another aspect, the writer is a pedestal defined zero throat writer.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: September 7, 2004
    Assignee: Western Digital (Fremont), Inc.
    Inventors: Yingjian Chen, Hugh Craig Hiner, Benjamin Chen, Xizeng Shi, Kyusik Sin
  • Publication number: 20040123449
    Abstract: The invention seeks to provide a thin-film coil of high space factor and of a low resistance in an easy and reliable manner. In a thin-film coil in which a first coil and a second coil each having a desired number of winding are electrically connected in series and mounted in the thin-film coil, the second coil is formed between winding portions of the first coil on substantially the same plane, and only an insulating film is interposed between the first coil and the second coil.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Inventor: Teruo Inaguma
  • Patent number: 6729012
    Abstract: A method of manufacturing a thin-film magnetic head comprises the steps of forming a bottom pole layer, forming a gap layer, forming a top pole layer, and forming a thin-film coil. The thin-film coil is wound around the top pole layer in a helical manner. In the step of forming the bottom pole layer, the bottom pole layer is formed to include a first layer facing a portion of the thin-film coil, and a second layer that forms a pole portion and is connected to a surface of the first layer facing the top pole layer. In the step of forming the thin-film coil, a portion of the coil is disposed on a side of the second layer and another portion of the coil is disposed over the top pole layer via an insulating film.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: May 4, 2004
    Assignee: TDK Corporation
    Inventor: Yoshitaka Sasaki
  • Patent number: 6631550
    Abstract: A method of manufacturing a thin-film magnetic head includes the steps of: forming a first shield layer and a first portion of a second shield layer to be placed in one plane and insulated from each other; forming at least part of a thin-film coil on the first portion of the second shield layer such that the coil is insulated from the first portion; forming a first insulating layer on the first shield layer; forming a magnetoresistive element on the first insulating layer; forming a second insulating layer on the magnetoresistive element; forming a second portion of the second shield layer on the second insulating layer; forming a gap layer on the second portion of the second shield layer; and forming a second magnetic layer on the gap layer.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: October 14, 2003
    Assignee: TDK Corporation
    Inventor: Yoshitaka Sasaki
  • Patent number: 6603641
    Abstract: A bottom pole is divided into a bottom pole tip and a bottom pole layer, and the bottom pole tip is formed on the flat surface of the bottom pole layer. An insulating layer is formed in a concave region adjacent to the bottom pole tip, and the throat height is determined by the end of the insulating layer on the bottom pole tip side. The film thickness of the second layer of thin film coil is thicker than that of the first layer of thin film coil. The film thickness of the first thin film coil is determined by the film thickness of the bottom pole tip. The whole coil resistance of the first and the second thin film coils is decreased by making the second thin film coil thicker than the first thin film coil. Thereby, the first thin film coil can be formed as thin as possible without increasing the coil resistance and the read write distance (RWD) can be shortened while the recording and reproducing capacity can be increased.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: August 5, 2003
    Assignee: TDK Corporation
    Inventor: Yoshitaka Sasaki
  • Patent number: 6496330
    Abstract: A magnetoresistive head having a split coil structure including multiple, similar coil layers separated by an insulator and joined at their ends to define parallel electrical paths. The coil passes through a magnetic yoke having an open end and a closed end and is electrically insulated from the yoke. The parallel electrical paths of the separate coil layers can each be modeled as a resistor in series with an inductor, each of the paths also being in parallel with a capacitor. The split coil has a much faster current rise time than a comparable single layer coil or than multiple coils connected in series. Since the coil current provides the magneto-motive force for imparting a signal on a passing recording medium, the decreased current rise time corresponds to an increased data recording rate.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: December 17, 2002
    Assignee: Read-Rite Corporation
    Inventors: Billy W. Crue, Jr., Zhupei Shi, Mark David Thomas, Lien-Chang Wang
  • Patent number: 6226860
    Abstract: A method of fabricating a coil structure for use in a writer portion of a recording head is disclosed. The method comprises fabricating a bottom pole. A bottom insulating layer is fabricated on the bottom pole, while a seed layer is fabricated on the bottom insulator layer. Alternating third and fourth coil conductors are spacially positioned on the seed layer. A first plurality of insulating barriers are fabricated on the seed layer between the alternating third and fourth coil conductors. A middle insulating layer is fabricated on the third coil conductor, the second coil conductor, and the first plurality of insulating barriers. The A alternating third and fourth coil conductors are spacially positioned on the middle insulating layer. A second plurality of insulating barriers are fabricated on the middle insulating layer between the alternating third and fourth conductors.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: May 8, 2001
    Assignee: Seagate Technology, Inc.
    Inventor: Daniel Paul Burbank
  • Patent number: 6195872
    Abstract: A method of manufacturing a thin film magnetic head including a first magnetic layer, a second magnetic layer, a gap layer, and a thin film coil consisting of one or more thin film coil layers.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: March 6, 2001
    Assignee: TDK Corporation
    Inventor: Yoshitaka Sasaki