Structure Or Manufacture Of Heads, E.g. Inductive {g11b 5/127} Patents (Class G9B/5.04)

  • Patent number: 8842388
    Abstract: Embodiments of the present invention provide a perpendicular magnetic recording head including a coil having small resistance. According to one embodiment, a nonmagnetic insulating layer formed on a main magnetic pole and a magnetic yoke are etched to form a recessed portion. The thickness of a conductive layer is increased by the depth of the recessed portion in a process for forming the conductive layer of the upper coil on the recessed portion to reduce resistance of the coil. Simultaneously with the formation of the recessed portion, a part of a second layer of a connection tab is removed. Simultaneously with the formation of the conductive layer of the upper coil, a space in which the part of the second layer of the connection tab is removed is filled with the same material as that of the conductive layer to further reduce the resistance of the entire coil.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: September 23, 2014
    Assignee: HGST Netherlands BV
    Inventors: Atsushi Kato, Ichiro Oodake, Gen Oikawa, Masahiko Soga
  • Publication number: 20140118860
    Abstract: Systems and methods related to magnetic tape heads are provided. A first process forms a first read module on a substrate in accordance with a prior generation recording format. A second process, different than the first, forms a second read module on a substrate in accordance with a present generation recording format. The first and second read modules are directly bonded in parallel such that a single continuous tape reading zone is defined. Write modules can be formed and disposed on opposite sides of and aligned with the tape reading zone. Bidirectional read/write heads, having backward reading compatibility, can be made and used accordingly.
    Type: Application
    Filed: October 25, 2012
    Publication date: May 1, 2014
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
  • Publication number: 20140098442
    Abstract: A data writer may be constructed, in accordance with some embodiments, with a write pole tip that is configured with leading and trailing edges on opposite sides of a tip body. The trailing edge may be shaped by a recess that extends into the tip body towards the leading edge.
    Type: Application
    Filed: October 8, 2012
    Publication date: April 10, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Harry Sam Edelman
  • Publication number: 20140098443
    Abstract: A mixed anisotropy magnetic field sensor includes a first magnetic material film having in-plane anisotropy with a first magnetic easy axis that is in-plane, a second magnetic material film having out-of-plane anisotropy with a second magnetic easy axis that is perpendicular to the first magnetic easy axis of the first magnetic material film, and a non-magnetic spacer between the first magnetic material film and the second magnetic material film. The first magnetic material film has a magnetization oriented in a first magnetization orientation parallel to the first magnetic easy axis in the presence of no applied magnetic field, and the second magnetic material film has a magnetization oriented in a second magnetization orientation parallel to the second magnetic easy axis in the presence of no applied magnetic field.
    Type: Application
    Filed: October 5, 2012
    Publication date: April 10, 2014
    Applicant: NVE CORPORATION
    Inventor: Joseph E. Davies
  • Publication number: 20140085753
    Abstract: A microwave assisted magnetic recording write head having a spin torque oscillator capable of producing high strength high frequency magnetic oscillations with reduced applied current. The spin torque oscillator uses a magnetic field generation layer with a high moment material including such as Fe and Co that is formed on an interlayer having a face centered cubic (fcc) crystal structure, that functions as an under-layer. The high moment magnetic field generation layer has also reduced magnetic damping.
    Type: Application
    Filed: September 27, 2012
    Publication date: March 27, 2014
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Keiichi Nagasaka, Masato Shiimoto, Masato Matsubara, Yuta Udou
  • Publication number: 20140085748
    Abstract: A device according to one embodiment includes a substrate; and a plurality of thin films above the substrate, the thin films having at least one dielectric layer; wherein the at least one dielectric layer has a more crystalline structure towards a first end thereof than towards an end thereof opposite the first end. A magnetic head according to one embodiment includes a substrate; and a plurality of thin films above the substrate, the thin films having at least one transducer formed therein and at least one dielectric layer; wherein the at least one dielectric layer has a more crystalline structure towards a media facing end thereof than towards an end thereof opposite the media facing end.
    Type: Application
    Filed: September 21, 2012
    Publication date: March 27, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Publication number: 20140078619
    Abstract: A magnetic recording head is fabricated with a pole tip shielded laterally on its sides by a pair of symmetrically disposed side shields formed of porous heterogeneous material that contains non-magnetic inclusions. The non-magnetic inclusions, when properly incorporated within the magnetic matrix of the shields, promote the formation of flux loops within the shields that have portions that are parallel to the ABS and do not display locally disorganized and dynamic regions of flux during the creation of magnetic transitions within the recording medium by the magnetic pole. These flux loop portions, combine with the magnetic flux emerging from the main pole to create a net writing field that significantly reduces adjacent track erasures (ATE) and wide area erasures (WATE).
    Type: Application
    Filed: September 15, 2012
    Publication date: March 20, 2014
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Suping Song, Lijie Guan, Tai Min, Yuhui Tang
  • Publication number: 20140063644
    Abstract: An apparatus and generally associated method may be directed to a magnetic reader capable of concurrently or independently data access and environmental measurements. Various embodiments construct such a magnetic reader with first and second data transducing elements that are each adapted to selectively read data and measure clearance from an adjacent data storage media.
    Type: Application
    Filed: August 29, 2012
    Publication date: March 6, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Huazhou Lou, Manuel Charles Anaya Defresne, Declan Macken, Brian William Karr
  • Publication number: 20140063646
    Abstract: A magnetic head according to one embodiment includes a module, the module having both read and write transducers positioned towards a media facing side of the module, wherein the read and write transducers are selected from a group consisting of piggyback read-write transducers, merged read-write transducers, interleaved read and write transducers, and an array of write transducers flanked by servo read transducers; wherein the write transducers include write poles having media facing sides with negative, zero or near-zero recession from a plane extending along the media facing side of a substrate of the module; wherein the read transducers each have at least one shield, wherein a media facing side of the at least one shield is more recessed from the plane than the write poles.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 6, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert G. Biskeborn, Jason Liang, Calvin S. Lo, Andrew C. Ting
  • Publication number: 20140063645
    Abstract: A magnetic head according to one embodiment includes a module, the module having first and second transducers of different transducer types positioned towards a media facing side of the module, wherein the different transducer types are selected from a group consisting of data reader transducers, servo reader transducers, write transducers, piggyback read-write transducers and merged read-write transducers; a first protection structure for protecting the first transducer; and wherein the second transducer has either no protection or is protected by a second protection structure that is different than the first protection structure.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 6, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Philipp Herget, Calvin S. Lo
  • Publication number: 20140029139
    Abstract: A transducing device may include features for adjusting the fly height between the transducing device and a magnetic storage medium. In one example, the transducing device includes a transducing element, at least one heating element, a permanently deformable material portion, and a temporarily deformable material portion. In this example, the permanently deformable material portion is configured to permanently deform in response to heat from the at least one heating element, and the temporarily deformable material portion is configured to temporarily deform in response to heat from the at least one heating element. The fly height of the device may be adjusted using lower temperatures and less energy than some other types of devices.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 30, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Vincent B. ENGELKES, Huazhou LOU
  • Publication number: 20130286511
    Abstract: Apparatus for two dimensional reading. In accordance with some embodiments, a magnetic read element has a bias magnet disposed between a plurality of read sensors. The bias magnet may be configured to concurrently bias each read sensor to a predetermined magnetization.
    Type: Application
    Filed: April 27, 2012
    Publication date: October 31, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Harry Sam Edelman, Thomas Roy Boonstra
  • Publication number: 20130279045
    Abstract: A head for magnetic thermally assisted magnetic data recording, having a read element, a write element a heater element for controlling thermal protrusion of the read and write elements and a thermal sensor for detecting contact a portion of the head with a magnetic media. The thermal contact sensor is arranged so that the thermal conduction between the thermal contact sensor and the read element is substantially equal to the thermal conductivity between the thermal contact sensor and the write element. In this way the accuracy of the detection of thermal contact is maintained whether the read element makes contact with the disk or the write element makes contact with disk.
    Type: Application
    Filed: April 19, 2012
    Publication date: October 24, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hiroshi Agari, Hideaki Tanaka, Yoshinori Takeuchi, Koichi Watanabe, Minoru Koike, Koji Tanaka
  • Publication number: 20130271869
    Abstract: A magnetic recording head includes a main magnetic pole generating a recording magnetic field, a trailing shield, a recording coil generating a magnetic field and a high frequency oscillator. The trailing shield includes a magnetic region including a gap side end surface facing a write gap and a nonmagnetic film arranged in the vicinity of the write gap in the trailing shield, and within a plane including track width direction centers of the main magnetic pole and the high frequency oscillator and being perpendicular to a recording layer of a recording medium, a film thickness of the nonmagnetic film along a track moving direction is substantially equivalent to or more than a half of a distance from the gap side end surface to the nonmagnetic film.
    Type: Application
    Filed: September 7, 2012
    Publication date: October 17, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoko TAGUCHI, Takuya MATSUMOTO
  • Publication number: 20130258525
    Abstract: An apparatus is provided that generally relates to a data writer that may be constructed with a write pole coupled to a yoke. The yoke may be configured with a stabilizing layer that stabilizes magnetic domains present in the yoke. In some embodiments, the yoke has first and second sub-yokes.
    Type: Application
    Filed: April 2, 2012
    Publication date: October 3, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Eric Roger Meloche, Eric Linville, Jianhua Xue
  • Publication number: 20130258519
    Abstract: A system and method for reading magnetic tape are provided herein. The system includes a tape head including two read arrays. Each of the two read arrays includes a first set of data read elements of a first channel pitch and a second set of data read elements of a second channel pitch, and the first set of data read elements and the second set of data read elements are interleaved. The tape head also includes a write array located between the two read arrays.
    Type: Application
    Filed: April 3, 2012
    Publication date: October 3, 2013
    Inventors: Paul W. Poorman, Mike Alan Holmberg
  • Publication number: 20130244192
    Abstract: A magnetic sensor comprising a first shield and a second shield and a sensor stack between the first and the second shield, the sensor stack having a plurality of layers wherein at least one layer is annealed using in-situ rapid thermal annealing. In one implementation of the magnetic sensor a seed layer is annealed using in-situ rapid thermal annealing. Alternatively, one of a barrier layer, an AFM layer, and a cap layer is annealed using in-situ rapid thermal annealing.
    Type: Application
    Filed: March 14, 2012
    Publication date: September 19, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Qing He, Wonjoon Jung, Mark William Covington, Mark Thomas Kief, Yonghua Chen
  • Publication number: 20130188275
    Abstract: According to one embodiment, a magnetic head includes a main pole, a write shield pole on a trailing side of the main pole, a recording coil, and a temperature control element unit. The temperature control element unit includes a first electrode on a leading side of the main pole and on both sides of a track of the main pole, a second electrode on the leading side of the main pole and on a track center of the main pole, an N-type semiconductor and a P-type semiconductor connected to the first and second electrodes, and a wiring portion which applies a current via the second electrode, N-type semiconductor, first electrode, P-type semiconductor, and second electrode. The first and second electrodes form a heat absorbing portion and a heat radiating portion.
    Type: Application
    Filed: July 5, 2012
    Publication date: July 25, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hiroshi ISOKAWA, Masaya OHTAKE, Toshiyuki IKAI
  • Publication number: 20130163121
    Abstract: A magnetic read sensor having a hard bias structure that extends beyond the back edge of the sensor stack by a controlled, distance that is chosen to maximize both hard bias field and hard bias magnetic coercivity and anisotropy. The hard bias structure has a back edge that is well defined and that has a square corner at its innermost end adjacent to the sensor stack. The magnetic sensor can be constructed by a process that includes a separate making an milling process that is dedicated to defining the back edge of the hard bias structure.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Quang Le, David J. Seagle, Guangli Liu, Yongchul Ahn, Simon H. Liao
  • Publication number: 20130163124
    Abstract: A magnetic read sensor having a flat shield for improved gap thickness definition and control. The magnetic read head includes a sensor stack and hard bias layer formed at either side of the sensor stack. A SiNx hard bias capping layer is formed over the hard bias layers between the hard bias structure and the upper magnetic shield. The hard bias capping layer has an upper surface that has been planarized by chemical mechanical polishing that is co-planar with an upper surface of the sensor stack. The read sensor is constructed by a method wherein the hard bias capping layer is constructed of a material (e.g. SiNx) that is also used as a CMP stop layer and that can be planarized by chemical mechanical polishing while having some resistance to removal by chemical mechanical polishing.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hicham M. Sougrati, Quang Le, Honglin Zhu
  • Publication number: 20130155544
    Abstract: In one embodiment, a magnetic head includes a main magnetic pole, a trailing shield positioned on a trailing side of the main magnetic pole, a trailing gap positioned between the trailing shield and the main magnetic pole, side shields positioned on either side of the main magnetic pole in a cross-track direction, side gaps positioned between the side shields and the main magnetic pole on either side of the main magnetic pole in the cross-track direction, and trailing shield gaps positioned on either side of the main magnetic pole in the cross-track direction between the trailing shield and the side shields, wherein the trailing shield gaps extend beyond the side gaps in a direction parallel to the cross-track direction. In addition, a method for producing a magnetic head as described above is also disclosed, according to one embodiment.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Tomoaki Hamasaki, Hiroyuki Katada, Isao Nunokawa, Kimitoshi Etoh
  • Publication number: 20130148242
    Abstract: According to one embodiment, a magnetic recording head includes a spin-torque oscillator between a main pole and a trailing shield. An oscillation layer of the spin-torque oscillator is formed by repeatedly stacking two or more laminates each including a metallic magnetic layer of a body-centered cubic crystalline metal and a metallic magnetic layer containing cobalt. The film thickness of each metallic magnetic layer is more than 0.2 nm and not more than 3 nm. The intensity of an anisotropic magnetic field is higher than a value obtained by subtracting the intensity of a gap magnetic field from the intensity of a diamagnetic field and lower than the intensity of the diamagnetic field.
    Type: Application
    Filed: August 14, 2012
    Publication date: June 13, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuhiko KOUI, Mariko KITAZAKI, Shuichi MURAKAMI, Kenichiro YAMADA
  • Publication number: 20130148228
    Abstract: A magnetic recording system configured for recording to a bit patterned media using both hypertrack recording and shingled recording. The magnetic recording system includes a write pole with a notched trailing edge that results in a write bubble with a trailing edge that has two outer convex lobes separated by a centrally disposed concave region. By locating one of the lobes over first and second data tracks of a hypertrack, a proper alignment of the relative phase of the two tracks can be maintained. Further adjustment to the alignment can be achieved by adjusting the radial location of the write head.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 13, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Thomas R. Albrecht, Prakash Kasiraj
  • Publication number: 20130135772
    Abstract: A method for manufacturing a magnetic sensor that includes depositing a plurality of mask layers, then forming a stripe height defining mask over the sensor layers. A first ion milling is performed just sufficiently to remove portions of the free layer that are not protected by the stripe height defining mask, the first ion milling being terminated at the non-magnetic barrier or spacer layer. A dielectric layer is then deposited, preferably by ion beam deposition. A second ion milling is then performed to remove portions of the pinned layer structure that are not protected by the mask, the free layer being protected during the second ion milling by the dielectric layer.
    Type: Application
    Filed: November 29, 2011
    Publication date: May 30, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yongchul Ahn, Xiaozhong Dang, Quang Le, Simon H. Liao
  • Publication number: 20130128371
    Abstract: Techniques to use a model associating condition of a tape head with tape head usage are described. The tape head is for use in a magnetic tape drive. In examples, a condition of the tape head is determined using a model. In examples, the model fits determined values of the condition parameter.
    Type: Application
    Filed: November 18, 2011
    Publication date: May 23, 2013
    Inventors: BRIAN BRONG, Mike Alan Holmberg, Steven L. Brittenham, Michael Anthony Ellis, Saiman Kusin, Geoff Spratt
  • Publication number: 20130107395
    Abstract: A magnetic head according to an embodiment includes: a spin-torque oscillator comprising a first ferromagnetic layer, a second ferromagnetic layer, a third ferromagnetic layer provided on the opposite side of the second ferromagnetic layer from the first ferromagnetic layer, a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, a second nonmagnetic layer provided between the second ferromagnetic layer and the third ferromagnetic layer, a first electrode provided on a surface on the opposite side of the first ferromagnetic layer from the first nonmagnetic layer, and a second electrode provided on a surface on the opposite side of the third ferromagnetic layer from the second nonmagnetic layer. Magnetization precession is induced in each of the first through third ferromagnetic layers when current is applied between the first and second electrodes.
    Type: Application
    Filed: October 19, 2012
    Publication date: May 2, 2013
    Inventors: Tazumi Nagasawa, Hirofumi Suto, Kiwamu Kudo, Rie Sato, Koichi Mizushima, Tao Yang
  • Publication number: 20130094108
    Abstract: A magnetic read sensor having improved magnetic performance and robustness. The magnetic sensor includes a magnetic free layer and a magnetic pinned layer structure. The magnetic pinned layer structure includes first and second magnetic layers separated from one another by a non-magnetic coupling layer. The second magnetic layer of the magnetic pinned layer structure includes a layer of CoFeBTa, which prevents the diffusion of atoms and also promotes a desired BCC crystalline grain growth. The magnetic free layer structure can also include such a CoFeBTa layer for further prevention of atomic diffusion and further promotion of a desired BCC grain growth.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 18, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Zheng Gao, Yingfan Xu, Hua Ai Zeng
  • Publication number: 20130083433
    Abstract: A magnetic head that includes: a slider having a leading edge and a trailing edge; and a transducer, the transducer formed on the trailing edge of the slider and the transducer including: a substrate; a basecoat positioned adjacent the substrate, wherein the basecoat includes a material having a Young's modulus that is less than that of alumina and a coefficient of thermal expansion that is less than that of alumina; a reader; a writer; a heater; and an overcoat encasing at least a portion of the transducer, wherein the overcoat includes a material having a Young's modulus that is less than that of alumina and a coefficient of thermal expansion that is less than that of alumina.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Paul Julio Sonda, Edwin Frank Rejda, Declan Macken
  • Publication number: 20130070367
    Abstract: A spin torque oscillator for microwave assisted recording includes a perpendicular free layer having a magnetic anisotropy axis in a direction perpendicular to a film surface, and an in-plane free layer composed of a magnetic film effectively having a magnetization easy plane on a film surface. When electric currents flows from the in-plane free layer side to the perpendicular free layer side, both free layers exchange spin information and thereby rotate their respective magnetizations almost antiparallel to each other and along a boundary surface with high-speed. Preferably, the perpendicular free layer is thinner than the in-plane free layer. It is also preferable that a magnetic anisotropy field of the perpendicular free layer attributable to materials should balance, in reverse directions, with an effective demagnetizing field in the perpendicular direction. Furthermore, the perpendicular free layer is preferably placed on the main pole side.
    Type: Application
    Filed: February 24, 2012
    Publication date: March 21, 2013
    Inventors: Masukazu IGARASHI, Masato MATSUBARA, Keiichi NAGASAKA, Masato SHIIMOTO
  • Publication number: 20130063837
    Abstract: A magnetic recording head used for microwave-assisted magnetic recording includes: a main pole; a spin torque oscillator provided on the main pole, including a high-speed rotating magnetization layer in which the magnetization is rapidly rotated by a spin torque; a trailing shield provided on the spin torque oscillator; and a sub pole magnetically coupled to the trailing shield provided in a medium-facing surface, extending in a vertical direction to the medium-facing surface. Then, a non-magnetic electrode is provided on the outside of a trailing gap in which the spin torque oscillator is provided with respect to a magnetic material of the main pole, the trailing shield, or the sub pole, to prevent the line resistance variation due to the AMR effect or the eddy current. Thus, the variation of the current flowing to the spin torque oscillator can be controlled to achieve stable oscillation.
    Type: Application
    Filed: February 23, 2012
    Publication date: March 14, 2013
    Inventors: Yuta UDO, Katsuro Watanabe
  • Publication number: 20130063840
    Abstract: According to one embodiment, a magnetic head has a main magnetic pole, a write-shield constituting the main magnetic pole and a magnetic circuit, and a spin torque oscillation element provided between the main magnetic pole and the write-shield. The spin torque oscillation element is provided with a first oscillation layer, a nonmagnetic spin sink layer, a second oscillation layer, a nonmagnetic intermediate layer, and a spin injection layer provided in sequence from the write-shield side to the main magnetic pole side. The nonmagnetic spin sink layer is formed of at least one element selected from the group consisting of Ru, Rh, Ta, W, Cr, Ir, Mo, Re, Nb, Pt, and Pd.
    Type: Application
    Filed: June 22, 2012
    Publication date: March 14, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuhiko Koui, Shuichi Murakami, Mariko Kitazaki, Yusuke Tomoda, Norihito Fujita
  • Publication number: 20130057980
    Abstract: The strength of a magnetic field applied from a main pole to an oscillator and the strength of a magnetic field applied from the main pole to a recording medium are improved in a magnetic recording head for microwave assisted recording. In the magnetic recording head according to the present invention, an interval between the main pole and a trailing shield at a place in a position above an air bearing surface is larger than an interval between the main pole and the trailing shield on the air bearing surface.
    Type: Application
    Filed: February 24, 2012
    Publication date: March 7, 2013
    Inventors: Masato SHIIMOTO, Kenji SUGIURA, Mikito SUGIYAMA, Isao NUNOKAWA, Yo SATO, Katsuro WATANABE, Kazuhiko HOSOMI, Nobuo YOSHIDA
  • Publication number: 20130057983
    Abstract: A magnetic write head for magnetic data recording that incorporates a novel magnetic oscillation generator stricture that sets up a magnetic oscillation in the magnetic media for improving writing and that also narrows the write width and reduces adjacent track interference by suppressing writing in regions outside of the desired data track. The magnetic oscillation generating structure includes a centrally disposed magnetic assist element that generates an oscillating magnetic field that oscillates in a direction that will assist the write pole in writing to the magnetic medium. The magnetic oscillation generating structure also includes first and second magnetic non-assist elements at either side of the assist element. The non-assist elements generate a magnetic field that oscillates in a second direction that is opposite to the first direction, which counteracts the magnetic write assist from the centrally disposed magnetic assist element and acts to suppress writing in these side regions.
    Type: Application
    Filed: September 6, 2011
    Publication date: March 7, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hiroyasu Tanabe, Hiroyasu Masuda
  • Publication number: 20130050866
    Abstract: In a magnetic recording device adopting a microwave assisted recording method, a microwave frequency on a positive polarity side and a microwave frequency on a negative polarity side are adjusted to be optimal. The magnetic recording device of the invention supplies to a magnetic head a write current of which a current waveform on the positive polarity side and a current waveform on the negative polarity side are asymmetric.
    Type: Application
    Filed: February 23, 2012
    Publication date: February 28, 2013
    Inventors: Masato MATSUBARA, Masato Shiimoto
  • Publication number: 20130050875
    Abstract: According to one embodiment, a magnetic recording head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a trailing shield opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between the main pole and the trailing shield in a range of a width of the main pole in a track width direction, and configured to generate a high-frequency magnetic field. The high-frequency oscillator includes a spin injection layer, an intermediate layer, and an oscillation layer, and at least the oscillation layer comprises divided oscillation regions.
    Type: Application
    Filed: August 2, 2012
    Publication date: February 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kenichiro YAMADA, Katsuhiko KOUI
  • Publication number: 20130050867
    Abstract: A magnetic head includes a medium facing surface that faces a surface of a recording medium, a write head section, a contact sensor that detects contact of the medium facing surface with the surface of the recording medium, and a heat sink adjacent to the contact sensor. The write head section has a magnetic pole that produces a write magnetic field for writing data on the recording medium. The contact sensor and the heat sink have respective end faces located in the medium facing surface. The contact sensor varies in resistance in response to temperature variations, and is to be energized. The heat sink includes an intermediate layer made of a nonmagnetic metal material, and two ferromagnetic layers made of a metal-based magnetic material, the two ferromagnetic layers being disposed with the intermediate layer therebetween, and being antiferromagnetically exchange-coupled to each other via the intermediate layer.
    Type: Application
    Filed: August 25, 2011
    Publication date: February 28, 2013
    Applicant: TDK CORPORATION
    Inventors: Takekazu YAMANE, Yosuke ANTOKU, Katsuki KURIHARA, Norio TAKAHASHI, Kenzo MAKINO
  • Publication number: 20130050869
    Abstract: In high frequency magnetic assisted recording technique, a spin torque oscillator that stably oscillates at a low current and a magnetic recording head with high recording density are provided. In a magnetic recording head including an oscillator that generates a high frequency magnetic field, a spin injection layer structure of two laminated magnetic layers which are coupled to be anti-parallel is adopted. A product Ms×t of the saturated magnetization Ms and the film thickness t of the first magnetic layer close to a field generation layer is smaller than a product Ms×t of the second magnetic layer remote from the field generation layer.
    Type: Application
    Filed: February 23, 2012
    Publication date: February 28, 2013
    Inventors: Keiichi NAGASAKA, Masato Shiimoto, Yo Sato
  • Publication number: 20130044394
    Abstract: In certain embodiments, a magnetic had includes a top shield and a bottom shield positioned at an air bearing surface. A polarizer and a nonmagnetic layer are positioned between the top and bottom shields. An analyzer is positioned adjacent the nonmagnetic layer at a distance recessed from the air bearing surface. Current travels through the top shield, polarizer, nonmagnetic layer, and first analyzer.
    Type: Application
    Filed: December 21, 2011
    Publication date: February 21, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Scott Stokes
  • Publication number: 20130038965
    Abstract: A method, including depositing a layer of material onto a base portion of a wafer, is disclosed. The layer of material has a first surface adjacent the base portion. The method also includes depositing a pattern of masking material onto a portion of a second surface of the layer. Material from the layer of material that is unprotected by the pattern of masking material is removed from the layer of material. By removing such material a portion of the layer of material is suspended from the base portion.
    Type: Application
    Filed: August 27, 2012
    Publication date: February 14, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Jie Zou, Kaizhong Gao
  • Publication number: 20130027803
    Abstract: In one embodiment, a magnetic head includes a main magnetic pole, a first MAMR element positioned above and wider than the main magnetic pole that is positioned to extend beyond sides of the main magnetic pole in a track width direction, a spin-rectifying-current-pinned-magnetic layer, a magnetic interlayer, a FGL, a magnetic-zone-control layer, and a second MAMR element that is wider than the main magnetic pole and is positioned to extend beyond sides of the main magnetic pole in the track width direction positioned above the first MAMR element, and a trailing shield positioned above the second MAMR element, wherein the main magnetic pole is adapted for producing a high-frequency magnetic field comprising oscillating microwaves, wherein during a writing operation, current is applied to the first and second MAMR elements to produce magnetic fields which oppose bit-switching in the magnetic medium to avoid adjacent track bit reversal.
    Type: Application
    Filed: July 27, 2011
    Publication date: January 31, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hiroyasu Tanabe, Masafumi Mochizuki
  • Publication number: 20130021697
    Abstract: A tunneling magneto-resistive reader includes a sensor stack separating a top magnetic shield from a bottom magnetic shield. The sensor stack includes a reference magnetic element having a reference magnetization orientation direction and a free magnetic element having a free magnetization orientation direction substantially perpendicular to the reference magnetization orientation direction. A non-magnetic spacer layer separates the reference magnetic element from the free magnetic element. A first side magnetic shield and a second side magnetic shield is disposed between the top magnetic shield from a bottom magnetic shield, and the sensor stack is between the first side magnetic shield and the second side magnetic shield. The first side magnetic shield and the second side magnetic shield electrically insulates the top magnetic shield from a bottom magnetic shield.
    Type: Application
    Filed: January 20, 2012
    Publication date: January 24, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Dimitar V. Dimitrov, Zheng Gao, Wonjoon Jung, Paul Edward Anderson, Olle Gunnar Heinonen
  • Publication number: 20130010387
    Abstract: A method for forming a magnetic write pole with a trapezoidal cross-section is described. The method consists of first forming a magnetic seedlayer on a base followed by depositing a removable material layer on the seedlayer, and then a resist layer on the removable material layer. A trench is then formed in the resist, and the resist is heated to cause the cross-sectional profile of the trench to assume a trapezoidal shape. The resist is then capped with another resist layer and further heated to cause the width of the trapezoidal trench to become narrower. The cap layer and removable material layer at the bottom of the trench are then removed and the trench filled with magnetic material by electroplating. The resist and seedlayer external to the trench are finally removed to form a write pole with a trapezoidal cross-section.
    Type: Application
    Filed: September 4, 2012
    Publication date: January 10, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: XiaoMin Yang, Shuaigang Xiao, Jie Gong, Michael Seigler
  • Publication number: 20130010386
    Abstract: An apparatus and associated method provides a magnetic element, such as a data transducing head. A first permanent magnet may be configured to bias the write pole to decrease remnant magnetization and erasure after write (EAW). The first permanent magnet can be separated from the write pole be a predetermined distance.
    Type: Application
    Filed: July 6, 2011
    Publication date: January 10, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Eric Roger Meloche, Jianhua Xue, Eric Linville, Huaqing Yin, Zhiran Wang, Frank A. McGinnity, Robert William Lamberton
  • Publication number: 20130003225
    Abstract: A method of fabricating a recording head includes depositing an insulator material onto at least a portion of a first member, wherein the insulator material forms an insulator film having a film thickness. The method further includes depositing a writer pole material onto the insulator film, wherein the writer pole material forms a writer pole member, and wherein the insulator film is between the writer pole member and a contact layer. Further, in some embodiments, the film thickness determines the distance between the writer pole member and the first contact member and also determines the distance between the writer pole member and the second contact member.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Nurul Amin, Ibro Tabakovic, Eric S. Linville, Ming Sun
  • Publication number: 20130003226
    Abstract: A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole. The write pole comprises a main pole with a tapered tip on a leading edge or a trailing edge, on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the main pole, giving the head a stepped profile. The yoke can be a single yoke formed on one side of the main pole or it can be two yokes formed on both the leading and trailing sides of the main pole. The write pole structure creates an efficient channeling of magnetic flux to the ABS surface of the pole tip which produces magnetic recording field at high area densities.
    Type: Application
    Filed: September 10, 2012
    Publication date: January 3, 2013
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Zhigang Bai, Kowang Liu, Yan Wu, Moris Dovek
  • Publication number: 20120327535
    Abstract: A write pole can have a magnetically conductive pole tip has at least one corner. The at least one corner may be chamfered to limit magnetic saturation of the conductive pole tip. The conductive pole tip can have one or more beveled surface that has a chamfered corner which extends a predetermined distance along an edge of the write pole.
    Type: Application
    Filed: June 22, 2011
    Publication date: December 27, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Eric Roger Meloche, Eric Linville, Jianhua Xue, Chris Rea, Huaqing Yin
  • Publication number: 20120314326
    Abstract: According to one embodiment, a recording head includes a main pole configured to apply a recording magnetic field to a recording medium, a trailing shield opposed to the main pole with a gap therebetween, a spin-torque oscillator at least a part of which is located between the main pole and the trailing shield and configured to apply a high-frequency magnetic field to the recording medium, and an auxiliary oscillator configured to apply an auxiliary magnetic field to the spin-torque oscillator.
    Type: Application
    Filed: February 29, 2012
    Publication date: December 13, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko TAKEO, Masahiro TAKASHITA
  • Publication number: 20120314325
    Abstract: A selectively magnetic insert that is capable of enhancing magnetic writing, such as in use as a data transducing head. In accordance with various embodiments, a write pole is in contact with a selectively magnetic insert that decouples the write pole from at least one adjacent shield in response a powered operation.
    Type: Application
    Filed: June 13, 2011
    Publication date: December 13, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: James Gary Wessel, Mourad Benakli, Raul Horacio Andruet, Kirill A. Rivkin, Sarbeswar Sahoo
  • Publication number: 20120307397
    Abstract: A magnetic head according to one embodiment includes outer modules each having a media bearing surface and an array of transducers selected from a group consisting of data read transducers and write transducers; and at least one inner module positioned between the outer modules, the inner module having a media bearing surface and an array of transducers selected from a group consisting of data read transducers and write transducers, wherein a configuration of at least one protection feature for the transducers on the outer modules is different than a configuration of at least one protection feature for the transducers on the inner modules.
    Type: Application
    Filed: June 2, 2011
    Publication date: December 6, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Publication number: 20120307403
    Abstract: According to one embodiment, a magnetic recording medium includes: a data area on which a plurality of first magnetic dots are arranged at predetermined positions to record information; a servo area on which a plurality of second magnetic dots for specifying the positions of said plurality of first magnetic dots are arranged at predetermined positions; and servo frames configured so that a frequency of said servo frames is 2 N per circumference of said medium having a radius, that said servo frames are radially discontinuous, and that said servo frame and a space-area, on which no servo frames exist, are alternately radially arranged at a cycle W.
    Type: Application
    Filed: February 13, 2012
    Publication date: December 6, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kazuto KASHIWAGI, Makoto Asakura, Haruhiko Izumi, Masatoshi Sakurai