Construction Or Disposition Of Windings {g11b 5/17} Patents (Class G9B/5.05)
  • Publication number: 20130329319
    Abstract: A magnetic head includes first and second coils, a main pole, a write shield, a return path section, and a core part. The return path section includes a yoke part magnetically connected to the write shield, and a coupling part located away from a medium facing surface and magnetically coupling the yoke part and the main pole to each other. The first coil is located on the front side in the direction of travel of a recording medium relative to the main pole and wound around the coupling part. The core part is located farther from the medium facing surface than is the coupling part, and is magnetically connected to the main pole. The second coil is located on the front side in the direction of travel of the recording medium relative to the main pole and wound around the core part.
    Type: Application
    Filed: June 11, 2012
    Publication date: December 12, 2013
    Applicants: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka SASAKI, Hiroyuki ITO, Kazuki SATO, Seiichiro TOMITA, Hironori ARAKI, Tatsuya SHIMIZU
  • Publication number: 20130308227
    Abstract: A magnetic head includes a magnetic structure incorporating a write shield. The magnetic structure is formed to include a first magnetic layer, a second magnetic layer stacked on the first magnetic layer, and a seed layer. The first magnetic layer has a front end face located in the medium facing surface and a top surface. The second magnetic layer has a front end face located in the medium facing surface and a bottom surface. The top surface of the first magnetic layer includes a first region including an end located in the medium facing surface and a second region farther from the medium facing surface than the first region. The seed layer is not present on the first region of the top surface of the first magnetic layer but is present on the second region.
    Type: Application
    Filed: May 16, 2012
    Publication date: November 21, 2013
    Applicants: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka SASAKI, Hiroyuki ITO, Shigeki TANEMURA, Kazuki SATO, Yukinori IKEGAWA, Atsushi IIJIMA, Tatsuya SHIMIZU
  • Publication number: 20130242432
    Abstract: A recording head comprising a write pole and a coil structure asymmetric with respect to the write pole and configured to generate more magnetic flux on a trailing side of the main pole than the magnetic flux on a front side of the main pole.
    Type: Application
    Filed: March 13, 2012
    Publication date: September 19, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Eric Roger Meloche, Chris Rea, Jianhua Xue, Eric Linville, John M. Wolf
  • Publication number: 20130215532
    Abstract: According to one embodiment, a main pole of a recording head includes a first magnetic pole layer and a second magnetic pole layer laminated on the trailing side of the first magnetic pole layer. The first magnetic pole layer includes a tapered portion and a first tip portion. The second magnetic pole layer includes a tapered portion and a second tip portion. A width in a track direction of the second tip portion is smaller than that of the first tip portion. The high-frequency oscillator is between the second tip portion and the trailing shield and includes a width in the track direction substantially equal to the width in the track direction of the second tip portion, and a height of the first tip portion is taller than that of the second tip portion.
    Type: Application
    Filed: August 21, 2012
    Publication date: August 22, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoko TAGUCHI, Kenichiro YAMADA, Katsuhiko KOUI, Tomomi FUNAYAMA, Norihito FUJITA
  • Publication number: 20130188281
    Abstract: In certain embodiments, a head includes a write coil having multiple coil turns. A portion of the multiple coil turns are positioned near an air bearing surface and form a v- or u-shape. In certain embodiments, a head includes a write coil having multiple coil turns. The coil turns closets to an air bearing surface are tapered.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 25, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Erik J. Hutchinson
  • Publication number: 20130176644
    Abstract: A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, a thin-film coil and a shield magnetic layer are laminated on a substrate. The thin-film magnetic head has a shield magnetic layer. This thin-film magnetic head has a hard guard frame layer surrounding an equidistant coil part, disposed at a position equidistant from the substrate, from outside and being in direct contact with almost a whole outside surface defining an outer shape of the equidistant coil part.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 11, 2013
    Applicants: SAE MAGNETICS (H.K.) LTD., HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka SASAKI, Hiroyuki ITO, Hironori ARAKI, Shigeki TANEMURA, Kazuki SATO, Atsushi IIJIMA
  • Patent number: 8427780
    Abstract: A magnetic head in one embodiment includes a bottom pole; a top pole positioned above a plane extending through the bottom pole and parallel to a plane of deposition of the bottom pole, wherein the top pole is at least partially offset from the bottom pole in a direction parallel to a plane of deposition of the top pole; a first write gap in the top pole; and a first coil for generating a magnetic flux across the first write gap. A method in one embodiment includes forming a bottom pole; forming a top pole above a plane extending through the bottom pole and parallel to a plane of deposition of the bottom pole, wherein the top pole is at least partially offset from the bottom pole in a direction parallel to a plane of deposition of the top pole, wherein at least one write gap is formed in the top pole; forming side poles for coupling the top and bottom poles; and forming a first coil for generating a magnetic flux across the first write gap.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: April 23, 2013
    Assignee: International Business Machines Corporation
    Inventors: Robert Glenn Biskeborn, Lubomyr T. Romankiw, Steven Erik Steen, Bucknell Chapman Webb
  • Publication number: 20130070364
    Abstract: A thin film magnetic head of the present invention is configured to include a main pole layer; a main pole direct junction magnetic layer that has an auxiliary pole layer and an auxiliary yoke layer, the main pole direct junction magnetic layer being directly joined to the main pole layer in a state where a recording gap layer is partially intervened near an air bearing surface (ABS) with respect to the main pole layer; and a first magnetic recording exciting coil that is buried between the auxiliary pole layer and the auxiliary yoke layer configuring the main magnetic direct junction magnetic layer with an insulating layer therebetween. Thereby, an effective magnetic path length can be shortened in order to improve the high-frequency characteristics, and furthermore, simplification of the manufacturing processes becomes possible.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 21, 2013
    Applicants: SAE Magnetics (H.K.) Ltd., TDK CORPORATION
    Inventors: Yuji Matsuura, Atsushi Yamaguchi, Tetsuji Hori, Naoto Matono
  • Publication number: 20130038966
    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: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Applicants: SAE MAGNETICS (H.K.) LTD., HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Atsushi Iijima
  • Publication number: 20130027810
    Abstract: The present invention relates to a method of forming a metal in a concave portion of a substrate. The method includes a step of preparing a substrate having a concave portion; a step of applying a liquid coating member on the substrate and filling in and solidifying the concave portion with the coating member; a step of covering the coating member with a resist; a step of forming a penetrating hole that penetrates the resist in a position of the concave portion of the substrate; a step of removing the coating member within the concave portion; and a step of filling a metal into a portion where the coating member has been removed.
    Type: Application
    Filed: July 29, 2011
    Publication date: January 31, 2013
    Applicant: TDK Corporation
    Inventors: Hisayoshi WATANABE, Yuji MATSUURA, Takayuki NISHIZAWA, Masashi SANO, Tetsuji HORI
  • Publication number: 20120320474
    Abstract: A microwave assisted magnetic head includes a main magnetic pole; a trailing shield, a main coil for causing the main magnetic pole to generate a perpendicular recording field, at least one secondary coil for generating an in-plane alternate-current (AC) magnetic field with a frequency in a microwave band from a magnetic recording gap between the main magnetic pole and the trailing shield, nonmagnetic films formed on magnetic recording gap facing surfaces that are defined by the main magnetic pole and the trailing shield, the main magnetic pole and the trailing shield being configured with first soil magnetic films, and second soft magnetic films formed further on the surfaces of the nonmagnetic films. The second soft magnetic films have larger anisotropy fields than the first soft magnetic films have.
    Type: Application
    Filed: June 20, 2012
    Publication date: December 20, 2012
    Applicant: TDK Corporation
    Inventors: Yoshikazu Soeno, Kei Hirata, Tsutomu Aoyama, Isamu Sato
  • Publication number: 20120314323
    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 and first and second coupling layers. The first coupling layer is connected to the write shield. The second coupling layer magnetically couples the first coupling layer to the yoke part, and has an end face facing toward a medium facing surface and located away from the medium facing surface. The coil includes a first coil element and a plurality of second coil elements that each extend to pass through a space defined by the main pole, the gap part, the write shield, and the return path section. The first coil element is disposed with the first coupling layer interposed between the medium facing surface and the first coil element. The second coil elements are disposed with the second coupling layer interposed between the medium facing surface and the second coil elements, and with the first coil element interposed between the main pole and the second coil elements.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 13, 2012
    Applicants: SAE MAGNETICS (H.K.) LTD., HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka SASAKI, Hiroyuki ITO, Kazuki SATO, Atsushi IIJIMA
  • Publication number: 20120275061
    Abstract: According to one embodiment, a magnetic recording device includes a magnetic recording head and a magnetic recording medium. The magnetic recording head includes a main magnetic pole, a shield and a stacked structure. The main magnetic pole has a medium facing surface and a main magnetic pole side surface. The shield has a shield side surface. The stacked structure is provided between the main magnetic pole and shield, and includes first and second magnetic layers, and an intermediate layer. The magnetic recording medium includes a backing layer and a magnetic recording layer. A distance between an end portion of the medium facing surface on a side of the stacked structure and the backing layer is twice or more of a distance between the main magnetic pole side surface and the shield side surface.
    Type: Application
    Filed: April 30, 2012
    Publication date: November 1, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masayuki TAKAGISHI, Hitoshi Iwasaki, Kenichiro Yamada, Katsuhiko Koui, Tomomi Funayama, Masahiro Takashita, Mariko Kitazaki, Soichi Oikawa
  • Publication number: 20120262825
    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 write shield layer has an opposing shield part opposing the main magnetic pole layer and a front shield part. The front shield part is connected to the opposing shield part without straddling the thin-film coil. Besides, the front shield part has a shield front end face disposed in the medium-opposing surface and a shield upper end face formed distanced from the medium-opposing surface. Further, the front shield part has a shield connecting part. The shield front end face is connected to the shield upper end face by the shield connecting part.
    Type: Application
    Filed: April 18, 2011
    Publication date: October 18, 2012
    Applicants: SAE MAGNETICS (H.K.) LTD., HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka SASAKI, Hiroyuki ITO, Shigeki TANEMURA, Kazuki SATO, Atsushi IIJIMA
  • Publication number: 20120229932
    Abstract: A magnetic layer for writing incorporates: a pole layer having an end face located in a medium facing surface and a lower yoke layer. A first magnetic layer for flux concentration is connected to the lower yoke layer at a location away from the medium facing surface, and passes a magnetic flux corresponding to a magnetic field generated by a first coil. A second magnetic layer for flux concentration is connected to the pole layer at a location away from the medium facing surface, and passes a magnetic flux corresponding to a magnetic field generated by a second coil. A nonmagnetic layer is disposed between the pole layer and the lower yoke layer. The lower yoke layer is connected to the pole layer at a location closer to the medium facing surface than the nonmagnetic layer.
    Type: Application
    Filed: May 21, 2012
    Publication date: September 13, 2012
    Applicants: SAE MAGNETICS (H.K.) LTD., HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Shigeki Tanemura, Tatsushi Shimizu, Tatsuya Shimizu
  • Publication number: 20120212855
    Abstract: A magnetic head includes a pole layer accommodated in a groove. The pole layer has a track width defining portion and a wide portion. The pole layer includes a plurality of magnetic films stacked. At least one of the plurality of magnetic films includes a first portion included in the track width defining portion, a second portion included in the wide portion, and a third portion coupling the first and second portions to each other. In a cross section passing through the center of the pole layer taken in the track width direction, the second portion is smaller than the first portion in thickness and the top surface of the third portion is inclined with respect to a direction perpendicular to a medium facing surface.
    Type: Application
    Filed: April 5, 2012
    Publication date: August 23, 2012
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Shigeki Tanemura, Hironori Araki, Kazuo Ishizaki, Takehiro Horinaka
  • Publication number: 20120182644
    Abstract: According to one embodiment, a recording head includes a main pole, a trailing core, a first coil wound around the trailing core, a leading core, and a second coil wound around the leading core. The trailing core includes a return pole opposed to a trailing side of the main pole with a write gap therebetween, and side shields arranged individually on opposite sides of the main pole transversely relative to tracks and magnetically separated from the main pole at a distance not more than double a track pitch of the recording medium. The leading core includes a junction opposed to a leading side of the main pole with a gap therebetween and joined to the side shields with a width of 20 ?m or less transversely relative to the tracks and a connecting portion joined to the main pole in a position off the recording medium.
    Type: Application
    Filed: September 2, 2011
    Publication date: July 19, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takuya MATSUMOTO, Tomoko Taguchi, Masaya Ohtake
  • Publication number: 20120147500
    Abstract: A bottom end of a main pole includes first, second, and third portions that are contiguously arranged in order of increasing distance from the medium facing surface. A top surface of the main pole includes fourth, fifth, and sixth portions that are contiguously arranged in order of increasing distance from the medium facing surface. A distance from the top surface of the substrate to any given point on each of the first and second portions decreases with increasing distance from the given point to the medium facing surface. The second portion has an angle of inclination greater than that of the first portion with respect to a direction perpendicular to the medium facing surface. A distance from the top surface of the substrate to any given point on each of the fourth and fifth portions increases with increasing distance from the given point to the medium facing surface.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 14, 2012
    Applicants: SAE MAGNETICS (H.K.) LTD., HEADWAY TECHNOLOGIES, INC.
    Inventors: Yoshitaka SASAKI, Hiroyuki ITO, Kazuki SATO, Shigeki TANEMURA, Hironori ARAKI, Atsushi IIJIMA
  • Publication number: 20120134046
    Abstract: According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field, a return pole opposed to a trailing side of the main pole across a write gap and configured to return magnetic flux from the main pole, a coil configured to excite magnetic flux in the main pole, a spin-torque oscillator located between respective facing surfaces of the return pole and an end portion of the main pole on the recording-medium side and configured to produce a high-frequency magnetic field, a current source configured to apply current to the spin-torque oscillator through the return and main poles, and a nonmagnetic layer provided in at least one of the poles and extending from a facing surface of the at least one of the poles, which faces the spin-torque oscillator, in a direction across the facing surface.
    Type: Application
    Filed: August 25, 2011
    Publication date: May 31, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takuya MATSUMOTO, Tomoko Taguchi, Masayuki Takagishi
  • Publication number: 20120134052
    Abstract: As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.
    Type: Application
    Filed: February 6, 2012
    Publication date: May 31, 2012
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Moris Dovek, Glen Garfunkel, Po Kang Wang
  • Publication number: 20120134050
    Abstract: As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.
    Type: Application
    Filed: February 6, 2012
    Publication date: May 31, 2012
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Moris Dovek, Glen Garfunkel, Po Kang Wang
  • Publication number: 20120134051
    Abstract: As track densities increase, it becomes increasingly important, while writing in a given track, not to inadvertently write data in adjoining tracks. This problem has been overcome by limiting the width of material in the ABS plane to what it is at the write gap. The part of the lower pole that is wider than this is recessed back away from the ABS, thereby greatly reducing its magnetic influence on adjacent tracks. Four different embodiments of write heads that incorporate this notion are described together with a description of a general process for their manufacture.
    Type: Application
    Filed: February 6, 2012
    Publication date: May 31, 2012
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Moris Dovek, Glen Garfunkel, Po Kang Wang
  • Publication number: 20120127611
    Abstract: A shield design for a magnetic write head is described that eliminates the far-field WATE problem while still maintaining side shielding ability. This is achieved by moving all but the central sections of the three shields (LS, SS, and WS) and, optionally, the top yoke a short distance further away from the recording medium than the ABS.
    Type: Application
    Filed: November 24, 2010
    Publication date: May 24, 2012
    Inventor: Tai Min
  • Publication number: 20120127610
    Abstract: A magnetic recording method for a recording layer of a magnetic recording medium uses a thin film magnetic head with a sub-coil or a microwave radiator. In the method, a microwave spread spectrum (SS) signal is applied to the sub-coil or the microwave radiator, the microwave SS signal including a ferromagnetic resonant (FMR) frequency of the recording layer as a carrier wave within a band so as to generate an in-plane high-frequency magnetic field so that a magnetization reversal magnetic field Hsw of the recording layer is lowered. The magnetic recording is performed while the magnetization reversal magnetic field Hsw of the recording layer is lowered.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 24, 2012
    Applicant: TDK CORPORATION
    Inventors: Tsutomu AOYAMA, Hiroshi Ikeda, Isamu Sato
  • Publication number: 20120113543
    Abstract: A magnetic recording head enabling both enhancement of a strength of a magnetic field from a main pole and provision of narrow-track recording to achieve a high recording density in a high-frequency magnetic field-assisted recording method is provided. An oscillator 110 that generates a high-frequency magnetic field is provided on the trailing side of a main pole 120, and viewed from the air bearing surface side, a ratio Pw/Two between a track width Pw of a trailing-side edge portion of the main pole and a track width Two of a leading-side edge portion of the oscillator is no less than 0.85 and no more than 1.25, and the main pole includes a part having a track width larger than Pw between the trailing-side edge portion and a leading-side edge portion of the main pole.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 10, 2012
    Applicant: HITACHI, LTD.
    Inventors: Masato Shiimoto, Mikito Sugiyama
  • Publication number: 20120092787
    Abstract: According to one embodiment, a magnetic head includes a magnetic core including a main pole, and a return pole opposed to the main pole with a magnetic gap therebetween, and configured to return magnetic flux from the main pole and form a magnetic circuit in conjunction with the main pole, a coil configured to excite magnetic flux in the magnetic circuit, and a nonmagnetic electrically conductive layer formed by disposing only a nonmagnetic material in the magnetic gap between the return pole and an end portion of the main pole on the recording medium side, and configured to electrically connect the main pole and the return pole. The main pole, the nonmagnetic electrically conductive layer, and the return pole are configured to constitute a series electrical circuit.
    Type: Application
    Filed: July 19, 2011
    Publication date: April 19, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Gaku KOIZUMI
  • Publication number: 20120063031
    Abstract: A transducing head writer comprising a write pole having write pole tip, a yoke disposed on the write pole at a location that is recessed from the write pole tip, and a bridge feature disposed on the write pole between the yoke and the write pole tip, where the bridge feature has a geometry that is larger at a recessed end adjacent to the yoke compared to a proximate end adjacent to the write pole tip.
    Type: Application
    Filed: September 10, 2010
    Publication date: March 15, 2012
    Applicant: Seagate Technology LLC
    Inventors: Alexandru Cazacu, Mark Anthony Gubbins, Marcus B. Mooney
  • Publication number: 20120050921
    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: Application
    Filed: August 27, 2010
    Publication date: March 1, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Steven Bruce Marshall
  • Publication number: 20120044598
    Abstract: A perpendicular magnetic recording (PMR) head is fabricated with a configuration of leading edge shields and trailing edge shields that reduce the leakage of flux between the main pole and the shields. The reduction of leakage is achieved by eliminating the sharp 90° corner between the backside surfaces of the shields and the surfaces adjacent to the main pole. In one embodiment the corner is replaced by two successive acute angles, in another embodiment it is replaced by a rounded surface. In a final embodiment, leakage between the pole and trailing edge shield is achieved by shortening the length of the write gap by forming the shield with a double taper.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 23, 2012
    Inventors: Zhigang Bai, Moris Dovek, Yan Wu
  • Publication number: 20120026628
    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: Application
    Filed: July 27, 2010
    Publication date: February 2, 2012
    Inventors: Zhihao Li, Xiaodong Che, Zhen Jin, Yansheng Luo
  • Publication number: 20110279922
    Abstract: The present invention relates providing a magnetic data eraser that is capable of performing magnetizing process for magnetizing magnetic recording medium such as a hard disk drive (HDD) is easily and with reduced electric power. The magnetic data eraser includes: holding drawer means for holding a magnetic recording medium which means has a mounting tray for mounting the magnetic recording medium, wherein the mounting tray is inclined a predetermined value of degrees of angle; and magnetizing means for magnetizing the magnetic recording medium, wherein the magnetizing means is covered by a magnetizing coil and has a hollow body portion, the holding drawer means being accommodated in the hollow body portion, and the magnetic recording medium being placed on the mounting tray of the holding drawer means.
    Type: Application
    Filed: September 10, 2010
    Publication date: November 17, 2011
    Inventor: Tadashi HONDA
  • Publication number: 20110273797
    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: Application
    Filed: May 10, 2010
    Publication date: November 10, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert G. Biskeborn, Philipp Herget
  • Publication number: 20110273796
    Abstract: A magnetic write head with a flux diverting structure for diverting stray flux received 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 diverting structure is proximate to the first pole and has a magnetic connection toward the back of the structure, and a non-magnetic separation toward the front of the structure. The flux diverting structure is comprised of a magnetic permeable material such that stray flux is diverted away from portions of the write head.
    Type: Application
    Filed: May 10, 2010
    Publication date: November 10, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert G. Biskeborn, Philipp Herget
  • Publication number: 20110249360
    Abstract: According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole including a write magnetic pole layer for recording, the write magnetic pole layer comprising magnetic layers being antiferromagnetically coupled via a thin non-magnetic conductor layer between the magnetic layers, wherein the write magnetic pole layer for recording has a flare section which gradually widens in a height-wise direction of a throat height section. The main magnetic pole also includes a non-magnetic cap layer laminated above an uppermost layer of the write magnetic pole layer, the non-magnetic cap layer being textured to provide anisotropy, and a subsidiary magnetic pole layer for supplementing the recording laminated above the non-magnetic cap layer. The head also includes an auxiliary magnetic pole, a magnetic shield positioned via a non-magnetic layer on a trailing edge and both sides of the main magnetic pole in a track width direction, and a coil for generating a recording magnetic field.
    Type: Application
    Filed: April 8, 2010
    Publication date: October 13, 2011
    Inventors: Isao Nunokawa, Mikito Sugiyama, Kikuo Kusukawa, Keizo Kato
  • Publication number: 20110242694
    Abstract: According to one embodiment, a magnetic head for perpendicular recording includes a first magnetic core includes a main pole configured to produce a recording magnetic field, and a return pole configured to reflux magnetic flux from the main pole to form a magnetic circuit in conjunction with the main pole, a first coil configured to excite magnetic flux in the magnetic circuit, side shields arranged individually on opposite sides of the main pole transversely relative to a track so as to be magnetically separated from the main pole and formed integrally with the return pole, a second magnetic core configured to form a physically closed magnetic path, a part of which comprises the return pole, and a second coil wound around the second magnetic core and configured to excite magnetic flux in the closed magnetic path.
    Type: Application
    Filed: January 4, 2011
    Publication date: October 6, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Tomoko Taguchi
  • Publication number: 20110128652
    Abstract: According to one embodiment, a magnetic head includes a main pole configured to produce a recording magnetic field, a return pole opposed to a trailing side of the main pole across a write gap and configured to return magnetic flux from the main pole, a coil configured to excite the main pole, a spin-torque oscillator between the main pole and a surface of the return pole, configured to produce a high-frequency magnetic field, and side shields individually on opposite sides of the main pole transversely relative to a track, magnetically separated from the main pole, and located at a height position above the recording medium higher than that of the spin-torque oscillator.
    Type: Application
    Filed: October 25, 2010
    Publication date: June 2, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoko Taguchi, Gaku Koizumi
  • Publication number: 20110102936
    Abstract: According to one embodiment, a perpendicular magnetic recording head includes a main pole, wherein a thickness in a down-track direction of the main pole increases moving away from an air bearing surface of the magnetic pole, and wherein a center position in a thickness direction of a portion of the main pole which is exposed at the air bearing surface (the ABS portion) is positioned toward a trailing side of the main pole with respect to a center position in a thickness direction of a portion of the magnetic pole having a greatest cross-sectional area and which is set back from the air bearing surface (the set-back portion). Further embodiments of this magnetic recording head, along with systems thereof and methods of producing magnetic recording heads are also described, according to more embodiments.
    Type: Application
    Filed: October 25, 2010
    Publication date: May 5, 2011
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Mikito Sugiyama, Kazuhiro Nakamoto, Kaori Suzuki
  • Publication number: 20110076393
    Abstract: Methods for fabrication of magnetic write heads, and more specifically to fabrication of magnetic poles and trailing magnetic pole steps. A write pole may first be patterned on a substrate. Then a side gap material may be patterned along sidewall portions of the write pole. Thereafter, a masking layer may be deposited and patterned to expose a portion of the write pole. A trailing magnetic pole step may be formed on the exposed portion of the write pole.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Inventors: Christian R. Bonhôte, Trevor W. Olson, Aron Pentek, Thomas J. A. Roucoux
  • Publication number: 20110038080
    Abstract: A perpendicular magnetic recording write head that a write pole, an electrically conductive coil coupled to the write pole for generating magnetic flux in the write pole in the presence of electrical write current, and a spin torque oscillator (STO) that injects auxiliary magnetic flux to the write pole in a direction generally orthogonal to the write pole to facilitate magnetization switching of the write pole. The STO comprises a stack of layers including electrodes, a pinned ferromagnetic layer having a fixed, a free ferromagnetic layer having a magnetization free to rotate, and a nonmagnetic spacer layer between the pinned and free layers. The free layer may be oriented either substantially orthogonal to the write pole or substantially parallel to the write pole, in which latter embodiment a flux guide may be located between the free layer and the write pole for directing the auxiliary magnetic flux from the free layer to the write pole.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 17, 2011
    Applicant: HITACHI GLOBAL STORAGE TECHNOLOGY NETHERLANDS B.V.
    Inventors: Michael Alex, John Thomas Contreras, Manfred Ernst Schabes, Xinzhi Xing
  • Publication number: 20100328816
    Abstract: Improved writability and a substantial reduction in adjacent track erasure are achieved by incorporating a composite shield structure in a PMR writer. There is a trailing shield formed a certain distance above the top surface of a write pole, a leading shield formed a certain distance below the bottom surface of the write pole, and a partial side shield having a side shield section formed on each side of the write pole. The partial side shield thickness is less than that of the write pole. Each partial side shield section has a side that is parallel to the nearest write pole side and a top surface that is offset from the write pole top surface by 0 to 0.15 microns. A plurality of magnetic connections between two or more shield elements is employed to ensure correct magnetic potential. The large write pole has a flare angle of 45 to 75 degrees.
    Type: Application
    Filed: August 30, 2010
    Publication date: December 30, 2010
    Inventors: Lijie Guan, Moris Dovek, Joe Smyth, Yoshitaka Sasaki
  • Publication number: 20100290157
    Abstract: A magnetic recording head is provided. The magnetic recording head comprises a write pole and a write coil structure configured to generate a magnetic field in the write pole. The write coil structure comprises a substrate layer and a coil material disposed within the substrate layer. The write coil structure is substantially free of photoresist. A method for forming a write coil structure is also provided. The method comprises the steps of providing a substrate layer, forming a photoresist pattern mask over the substrate layer, opening a damascene trench in the substrate layer by reactive ion etching, and disposing a coil material into the damascene trench in the substrate layer.
    Type: Application
    Filed: May 14, 2009
    Publication date: November 18, 2010
    Applicant: Western Digital (Fremont), LLC
    Inventors: Jinqiu Zhang, Hongping Yuan, Hai Sun, Ming Zhao
  • Publication number: 20100265617
    Abstract: To provide a magnetic head provided with a microprocessor capable of storing a firmware downloaded from an external server. The magnetic head has a core which is provided with a coil for converting data stored in a magnetic card to analog signals, an A/D conversion chip which is connected to the core to convert the analog signals to digital signals, and the microprocessor which is connected to the A/D conversion chip. The processor has a firmware storage means. When the firmware which controls its arithmetic/storage functions and controls an external hardware is downloaded from the external server (11) to the magnetic head, the firmware storage means stores the firmware.
    Type: Application
    Filed: December 22, 2008
    Publication date: October 21, 2010
    Inventor: Yasuo Isuyama
  • Publication number: 20100254041
    Abstract: A perpendicular magnetic recording system has a write head having a main helical coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The auxiliary coil is preferably a helical coil wrapped around the auxiliary pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.
    Type: Application
    Filed: April 6, 2009
    Publication date: October 7, 2010
    Applicant: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.
    Inventors: Michael Alex, John Thomas Contreras, Manfred Ernst Schabes, Xinzhi Xing
  • Publication number: 20100254042
    Abstract: A perpendicular magnetic recording system has a write head having a main coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.
    Type: Application
    Filed: April 6, 2009
    Publication date: October 7, 2010
    Applicant: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.
    Inventors: John Thomas Contreras, Manfred Ernst Schabes, David John Seagle
  • Publication number: 20100188774
    Abstract: A magnetic head in one embodiment includes a bottom pole; a top pole positioned above a plane extending through the bottom pole and parallel to a plane of deposition of the bottom pole, wherein the top pole is at least partially offset from the bottom pole in a direction parallel to a plane of deposition of the top pole; a first write gap in the top pole; and a first coil for generating a magnetic flux across the first write gap. A method in one embodiment includes forming a bottom pole; forming a top pole above a plane extending through the bottom pole and parallel to a plane of deposition of the bottom pole, wherein the top pole is at least partially offset from the bottom pole in a direction parallel to a plane of deposition of the top pole, wherein at least one write gap is formed in the top pole; forming side poles for coupling the top and bottom poles; and forming a first coil for generating a magnetic flux across the first write gap.
    Type: Application
    Filed: January 23, 2009
    Publication date: July 29, 2010
    Inventors: Robert Glenn Biskeborn, Lubomyr T. Romankiw, Steven Erik Steen, Bucknell Chapman Webb
  • Publication number: 20100157471
    Abstract: According to one embodiment, a system comprises an upper yoke having a first length defined between a pole tip thereof and a back gap thereof. In addition, the system includes a lower yoke having a second length defined between a pole tip thereof and a back gap thereof, the second length being greater than the first length. Also, the system includes coil turns in the upper and lower yokes. Additional systems and methods are also presented.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 24, 2010
    Inventors: Donald G. Allen, Wen-Chien David Hsiao, Edward Hin Pong Lee, Jennifer Leung, Vladimir Nikitin
  • Publication number: 20100149687
    Abstract: A magnetic head includes a coil, a pole layer, and a coil adjacent layer. The coil includes a winding portion having two side surfaces. The coil adjacent layer is adjacent to at least part of the whole of the two side surfaces of the winding portion. The coil adjacent layer is formed of a nonmagnetic material having a linear thermal expansion coefficient of 5×10?6/° C. or smaller at a temperature of 25° C. to 100° C. and having a thermal conductivity of 40 W/m·K or higher at a temperature of 25° C.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 17, 2010
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Hironori Araki, Yoshitaka Sasaki, Hiroyuki Ito, Takehiro Horinaka, Kazuo Ishizaki, Shigeki Tanemura
  • Publication number: 20100134921
    Abstract: According to one embodiment, a storage device includes a coil supporting arm, an actuator, and a magnetic circuit. The coil supporting arm includes a flat coil and a coil supporting module that is coupled with the inner circumference of the flat coil to support the flat coil. The actuator holds a head at one end and is provided with the coil supporting arm at another end. The magnetic circuit is arranged near the flat coil to drive the actuator.
    Type: Application
    Filed: September 29, 2009
    Publication date: June 3, 2010
    Applicant: FUJITSU LIMITED
    Inventor: Hiroshi Suzuki
  • Publication number: 20100134922
    Abstract: A magnetic recording head includes a first magnetic pole, a second magnetic pole, a spin torque oscillator, a first coil, a second coil, and a third coil. The first magnetic pole applies a recording magnetic field to a magnetic recording medium. The second magnetic pole is provided parallel to the first magnetic pole. At least a portion of the spin torque oscillator is provided between the first magnetic pole and the second magnetic pole. The first coil magnetizes the first magnetic pole. A current is passed through the second coil independently of the first coil. A current is passed through the third coil independently of both the first coil and the second coil.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 3, 2010
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kenichiro Yamada, Hitoshi Iwasaki, Masayuki Takagishi
  • Publication number: 20100079894
    Abstract: To provide a magnetic transfer master carrier to be placed on a perpendicular magnetic recording medium so as to transfer magnetic information to the medium by application of a magnetic field, the magnetic transfer master carrier including: transfer portions that include a magnetic layer and correspond to the magnetic information; and non-transfer portions which are lower in height than the transfer portions that include the magnetic layer, and each of which has a concave shape, wherein the magnetic layer has perpendicular magnetic anisotropy, and the magnetic anisotropy energy of the magnetic layer is less than 4×106 erg/cm3.
    Type: Application
    Filed: September 30, 2009
    Publication date: April 1, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Yoichi Nishida, Masakazu Nishikawa, Hideyuki Kubota