Magnetic Coating Patents (Class 427/128)
  • Patent number: 8153189
    Abstract: A novel structure is provided in which an ordered alloy material is filled in pores of the structure. A process for producing the structure is also provided. The process comprises a first step for forming an alloy in pores of a porous layer, a second step for forming a film composed of a second material on the porous layer, and a third step for heat-treating the porous layer having the film. Further a process is provided for producing a structure containing fine L10-crystal grains with a low-temperature heat treatment. This process comprises a process for producing a structure containing a magnetic substance dispersed in a nonmagnetic material, comprising: forming a first layer containing a magnetic substance A dispersed in a nonmagnetic material, forming a second layer containing a magnetic substance B on the first layer, and heating the first layer and the second layer during or after formation of the second layer to connect the magnetic substance A and the magnetic substance B to form an ordered alloy.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: April 10, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Ichihara, Toru Den
  • Patent number: 8151442
    Abstract: Magnetoresistive (MR) elements having flux guides defined by the free layer. The MR element includes a free layer, a spacer/barrier layer, a pinned layer, and a pinning layer. A back edge of the free layer (opposite the sensing surface of the MR element) extends past a back edge of the spacer/barrier layer. The portion of the free layer extending past the back edge of the spacer/barrier layer defines a continuous flux guide. The flux guide is processed to reduce the conductive characteristics of the flux guide, thereby reducing current shunt loss in the flux guide.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: April 10, 2012
    Assignee: Hitachi Global Strorage Technologies Netherlands, B.V.
    Inventor: Hardayal S. Gill
  • Patent number: 8137590
    Abstract: Solid particles bearing zwitterionic functional groups exhibit properties unlike other functionalized particles, and are particularly useful as proton-conductive fillers in membranes for fuel cells, where they increase physical properties as well as charge conducting properties. The particles are prepared by reacting functionalized particles with zwitterionic group-containing silanes or siloxanes.
    Type: Grant
    Filed: October 5, 2006
    Date of Patent: March 20, 2012
    Assignee: Wacker Chemie AG
    Inventors: Christoph Briehn, Peter Ball, Martina Baumann, Torsten Gottschalk-Gaudig, Manfred Hoelzl
  • Patent number: 8133529
    Abstract: A method of forming a micromagnetic device including providing a substrate and forming a magnetic core layer over the substrate from a magnetic alloy. The magnetic alloy includes iron, cobalt and phosphorous. A content of the cobalt is in a range of 1.8 to 4.5 atomic percent. A content of the phosphorus is in a range of 20.1 to 30 atomic percent. A content of the iron is substantially a remaining proportion of the magnetic alloy.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: March 13, 2012
    Assignee: Enpirion, Inc.
    Inventors: Ashraf W. Lotfi, Trifon M. Liakopoulos, Robert W. Filas
  • Publication number: 20120045575
    Abstract: A method of producing a nanopattern on an upper side and a lower side of a disc.
    Type: Application
    Filed: October 28, 2011
    Publication date: February 23, 2012
    Inventor: Erich Thallner
  • Publication number: 20120037615
    Abstract: An item of induction cookware for keeping food warm comprises a base with ribs, between which the base is coated with a ferromagnetic material. According to the invention, the ferromagnetic material is divided into fields. This prevents constriction points in the ferromagnetic material, at which intense local heating can occur, which can cause the induction cookware to break.
    Type: Application
    Filed: April 29, 2010
    Publication date: February 16, 2012
    Applicant: Gastros AG
    Inventor: Timo Hafner
  • Patent number: 8110119
    Abstract: A method of manufacturing a magnetic field sensor device in one embodiment includes applying a mask on a substrate, performing a wet etching procedure on the substrate for generating at least a first groove having tilted side walls, and depositing at least one layer of magnetoresistive material onto a section of the surface of at least a first tilted side wall of the groove. A method of manufacturing a magnetic field sensor device on a substrate having a plurality of tilted planar sections, each of the tilted planar sections having a surface normal angled with respect to a surface normal of the substrate is also provided.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: February 7, 2012
    Assignee: International Business Machines Corporation
    Inventors: Marcus Breuer, Guenther Crolly, Michael Haag, Manfred Jung, Thorsten Muehge, Johannes Paul, Joerg Sauerwein, Rolf Schaefer, Alexandra Welzel
  • Patent number: 8101049
    Abstract: Disclosed is a method for the low cost manufacturing a plurality of rigid sputtered magnetic media disks of one or more sizes from a rigid sheet, in which one or more initial steps of preparing the media are performed while the media is in sheet form. The individual disks are then removed from the sheet, and final processing is performed individually on the disks.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: January 24, 2012
    Assignee: Seagate Technology LLC
    Inventors: Jeffrey Shane Reiter, Steven Eric Barlow, Matthew James Cross
  • Publication number: 20120003503
    Abstract: An aspect of the present invention relates to a method of manufacturing a magnetic recording medium comprising dispersing magnetic particles in a water-based solvent having a pH that is lower than an isoelectric point of the magnetic particles to prepare a magnetic liquid, wherein the dispersing is conducted to a state of dispersion where a particle diameter in liquid is equal to or lower than 35 nm; adjusting a zeta potential of the magnetic particles to within a range of 0 to 25 mV by modifying a surface of the magnetic particles with the addition of a prescribed surface-modifying agent to the. magnetic liquid; dispersing the magnetic particles after the adjusting together with an organic solvent and a binder to prepare a magnetic coating material; and forming a magnetic layer of the magnetic recording medium with the magnetic coating material that has been prepared.
    Type: Application
    Filed: July 1, 2011
    Publication date: January 5, 2012
    Applicant: FUJIFILM CORPORATION
    Inventor: Masahiko MORI
  • Patent number: 8034413
    Abstract: A method for manufacturing discrete track media and patterned media is disclosed which enables a magnetic recording layer having excellent magnetic characteristics to be obtained without imparting damage to a crystal orientation control layer which is at the surface when forming the magnetic recording layer. The method for manufacturing magnetic recording media comprises a process of forming a soft magnetic layer on a substrate; a process of forming a first crystal orientation control layer on the soft magnetic layer; a process of providing a depression in at least a portion of the first crystal orientation control layer; a process of performing heat treatment of the first crystal orientation control layer; and a process of forming a magnetic recording layer on the first crystal orientation control layer.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: October 11, 2011
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Shinji Uchida
  • Publication number: 20110244116
    Abstract: Disclosed are methods and systems for transferring dry or semi-dry nanoparticles onto a substrate. In one embodiment, this includes the steps of providing a roller comprising an elastomeric stamp; transferring nanoparticles in a dry or semi-dry state, and which contact the surface of a donor substrate, from the donor substrate onto the elastomeric stamp; and depositing the dry or semi-dry nanoparticles from the elastomeric stamp onto a receiver substrate by rolling the elastomeric stamp onto the receiver substrate. The substrate, in other embodiments, can have a relief structure.
    Type: Application
    Filed: April 1, 2011
    Publication date: October 6, 2011
    Applicants: Rhodia Operations, The Trustees of the University of Pennsylvania
    Inventors: Chantal BADRE, Jean-Paul Chapel, Shu Yang, Jean-Christophe Castaing
  • Patent number: 8028400
    Abstract: A method for forming a tapered, electroplated structure. The method involves forming a first mask structure having an opening. A shrink material is deposited into the opening, such that the thickness of the shrink material is less than the thickness of the first mask structure. The first mask structure and the shrink material are then heated causing the sides of the opening in the mask structure to bulge inward. The shrink material is then removed, and a first electrically conductive material can then be electroplated into the opening to a thickness that is much less than the thickness of the mask. The bulbous shaped of the deformed photoresist mask forms a taper on the first electrically conductive material. The first mask can then be removed and a second electrically conductive material can be electroplated over the first electrically conductive material.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: October 4, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Christian Rene Bonhote, Jeffrey S. Lille, Scott Arthur MacDonald
  • Patent number: 8029853
    Abstract: The inventive fabrication process for magnetoresistive devices (CPP-GMR devices) involves the formation of a zinc oxide or ZnO layer that provides the intermediate layer of a spacer layer, comprising Zn film formation operation for forming a zinc or Zn layer and Zn film oxidization operation for oxidizing the zinc film after the Zn film formation operation. The Zn film formation operation is implemented such that after a multilayer substrate having a multilayer structure before the formation of the Zn film is cooled down to the temperature range of ?140° C. to ?60° C., the formation of the Zn film is set off, and the Zn film oxidization operation is implemented such that after the completion of the Zn film oxidization operation, oxidization treatment is set off at the substrate temperature range of ?120° C. to ?40° C. Thus, excelling in both flatness and crystallizability, the ZnO layer makes sure the device has high MR ratios, and can further have an area resistivity AR best suited for the device.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: October 4, 2011
    Assignee: TDK Corporation
    Inventors: Hironobu Matsuzawa, Tsutomu Chou, Yoshihiro Tsuchiya, Shinji Hara
  • Patent number: 8028399
    Abstract: Write elements and methods of fabricating magnetic write poles are described. For one method, a vertical mask structure is formed on a magnetic layer in locations of a pole tip and a yoke of a write pole. The vertical mask structure may be formed by coating vertical surfaces of resists with an atomic layer deposition (ALD) process or a similar process. A removal process is then performed around the vertical mask structure to define the pole tip and part of the yoke of the write pole, and the vertical mask structure is removed. A lower portion of the pole tip is them masked while the upper portion of the pole tip and the part of the yoke is exposed. The upper portion of the pole tip and the part of the yoke are then expanded with magnetic material, such as with a plating process.
    Type: Grant
    Filed: December 16, 2007
    Date of Patent: October 4, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Amanda Baer, Jeffrey S. Lille, Aron Pentek
  • Patent number: 8015692
    Abstract: A method for providing a perpendicular magnetic recording head includes providing a metal underlayer and forming a trench in the metal underlayer. The trench has a bottom and a top wider than the bottom. The method also includes providing a PMR pole. At least a portion of the PMR pole resides in the trench. The method also includes providing a write gap on the PMR pole and providing a top shield on at least the write gap.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: September 13, 2011
    Assignee: Western Digital (Fremont), LLC
    Inventors: Lei Larry Zhang, Yong Shen, Honglin Zhu, Yizhong Wang
  • Patent number: 8007860
    Abstract: There is provided a method for manufacturing a magnetic recording medium which can easily produce a magnetic recording medium, the magnetic recording medium having a plurality of magnetically separated recording layers suitable as the recording layers in a discrete track medium or patterned medium, and also having excellent surface flatness, in which spaces between the adjacent recording layers are filled in with a non-magnetic material.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: August 30, 2011
    Assignee: Showa Denko K.K.
    Inventors: Shinichi Ishibashi, Yoshiko Takahashi, Naoyuki Imai, Masato Fukushima
  • Patent number: 8003163
    Abstract: Provided are a magnetic recording medium and a method of manufacturing the magnetic recording medium. The magnetic recording medium includes a substrate, a soft magnetic underlayer formed on the substrate, a texturing layer formed on the soft magnetic underlayer and including a uniform pattern, and a recording layer including magnetic grains and a non-magnetic boundary region isolating the magnetic grains. The magnetic grains and the non-magnetic boundary region of the recording layer are formed into a regular granular structure by segregation according to the regular pattern of the texturing layer. Therefore, a regular granular structure can be formed in the recording layer without a process such as etching of the recording layer, so that the recording density of the magnetic recording medium can be largely improved.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: August 23, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Du-hyun Lee, Seong-yong Yoon, Jin-seung Sohn, Byung-kyu Lee
  • Patent number: 7998912
    Abstract: A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may include a non-phosphazene component and a phosphazene component where the non-phosphazene component is a difunctional perfluoropolyether compound terminated with first and second polar end groups, the first polar end group comprising a first number of hydroxyls and the second polar end includes a second number of hydroxyls, greater than the first number of hydroxyls. The phosphazene component may be a difunctional perfluoropolyether compound terminated with a phosphazene functional group and with a third polar end group, the third polar end group comprising a third number of hydroxyls equal to the second number of hydroxyls.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: August 16, 2011
    Assignee: WD Media, Inc.
    Inventors: Shaun H. Chen, Yasuo Sakane, Henry S. Nishihira, Chi Kong Kwok, The V. Tran, Bing-Shiuan Chang
  • Patent number: 7989065
    Abstract: Magnetically responsive particles can include two or more magnetically responsive layers (“MRL”). As such, the particles can have the following: a polymeric core; a first magnetically responsive layer (“MRL”) on the core; a first polymeric layer bound to the first MRL; a second MRL layer bound to the first polymeric layer; and a second polymeric layer bound to the second MRL. The particles can have a faster magnetic response time compared to a similar particle having only a single MRL, which can be at least 25% faster. Also, the particle can have a magnetic squareness of less than about 0.1. Preferably, the particle can have negligible residual magnetism after being exposed to a magnetic field sufficient for the particle to respond thereto. Further, the particle can be colloidally stable in water at concentrations from about 0.1 to 10 grams of particle per 100 milliliters of water.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: August 2, 2011
    Assignee: Seradyn, Inc.
    Inventors: J Winstead, William L. Grimm
  • Publication number: 20110177360
    Abstract: A method of producing a perpendicular magnetic recording medium with a magnetic recording layer formed from ferromagnetic crystal grains and oxide-including non-magnetic crystal grain boundaries and provided on a non-magnetic substrate. The method is initiated by forming the magnetic recording layer by a reactive sputtering method using rare gas containing 2% by volume to 10% by volume (both inclusively) of oxygen gas at an initial stage of film formation. The method continues by successively forming the magnetic recording layer by reactive sputtering while reducing the concentration of the oxygen gas. The method may further include forming an undercoat layer of Ru or a Ru-alloy under the magnetic recording layer. In this manner, a granular magnetic layer having high characteristic coercive force (Hc) can be formed, while reducing the amount of expensive Pt or Ru required.
    Type: Application
    Filed: January 10, 2011
    Publication date: July 21, 2011
    Applicant: Fuji Electric Device Technology Co., Ltd.
    Inventor: Naoki TAKIZAWA
  • Publication number: 20110177590
    Abstract: The present invention provides compositions and methods that combine the initial patterning capabilities of a direct cell printing system with the active patterning capabilities of magnetically labeled cells, such as cells labeled with superparamagnetic nanoparticles. The present invention allows for the biofabrication of a complex three-dimensional tissue scaffold comprising bioactive factors and magnetically labeled cells, which can be further manipulated after initial patterning, as well as monitored over time, and repositioned as desired, within the tissue engineering construct.
    Type: Application
    Filed: December 13, 2010
    Publication date: July 21, 2011
    Inventors: Alisa Morss Clyne, Kivilcim Buyukhatipoglu, Robert Chang, Wei Sun
  • Publication number: 20110165439
    Abstract: Provided is a method of manufacturing a magnetic disk glass substrate, wherein, in a main surface polishing process, main surface polishing is applied to one of main surfaces of a glass substrate so that the one main surface has a predetermined arithmetic mean roughness, and main surface polishing is applied to the other main surface of the glass substrate so that the other main surface has a roughness which is higher than the arithmetic mean roughness (Ra) of the one main surface and which is low enough to prevent a component forming the magnetic disk glass substrate from being eluted from the other main surface.
    Type: Application
    Filed: September 2, 2009
    Publication date: July 7, 2011
    Applicants: HOYA CORPORATION, HOYA GLASS DISK (THAILAND) LTD.
    Inventors: Kenichi Nishimori, Tadashi Tomonaga
  • Publication number: 20110159174
    Abstract: A doping gun may be used to dope the coating layer of a bonded material with magnetically-sensitive particles. During a recycling process, pieces of the coating layer may be magnetically separated from non-doped pieces of the bonded material. In this way, the non-doped pieces are of a relatively high purity level. Then, these non-doped pieces can be recycled with an improved yield.
    Type: Application
    Filed: February 16, 2010
    Publication date: June 30, 2011
    Applicant: ENVIRONTICS, VILL.
    Inventor: Manibrata Paul
  • Publication number: 20110151377
    Abstract: Compositions including hard magnetic photoresists, soft photoresists, hard magnetic elastomers and soft magnetic elastomers are provided.
    Type: Application
    Filed: April 30, 2010
    Publication date: June 23, 2011
    Applicant: Simon Fraser University
    Inventors: Bonnie GRAY, Daniel B. LEZNOFF, Jasmine L. KORCOK, Ajit KHOSLA
  • Patent number: 7960025
    Abstract: The invention relates to nanoparticles of noble metals, having a controlled microstructure which leads to the appearance of ferromagnetic behaviour in said nanoparticles, thereby enabling the use of very small magnets (<5 nm) in a range in which standard ferromagnetic metals behave as superparamagnetic entitles (disappearance of hysteresis cycle). The inventive nanoparticles can be used, for example, to reduce the dimensions in magnetic recordings, as well as in biomedicine as tools for biomolecule recognition, nuclear magnetic resonance imaging, drug-release control or hypothermia treatments.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: June 14, 2011
    Assignees: Consejo Superior De Investigaciones Cientificas, Universidad Complutense De Madrid
    Inventors: M' Asunción Fernandez Camacho, Rocio Litran Ramos, Teresa Cristina Rojas Ruiz, Juan Carlos Sanchez Lopez, Antonio Hernando Grande, Patricia Crespo Del Arco, Blanca Sampedro Rozas
  • Patent number: 7950135
    Abstract: A manufacturing method of an MR element in which current flows in a direction perpendicular to layer planes, includes a step of forming on a lower electrode layer an MR multi-layered structure with side surfaces substantially perpendicular to the layer lamination plane, a step of forming a first insulation layer on at least the side surfaces of the formed MR multi-layered structure, a step of forming a second insulation layer and a magnetic domain control bias layer on the lower electrode layer, and a step of forming an upper electrode layer on the MR multi-layered structure and the magnetic domain control bias layer.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: May 31, 2011
    Assignee: TDK Corporation
    Inventors: Takeo Kagami, Takayasu Kanaya
  • Patent number: 7951415
    Abstract: A pole layer has an end located in a medium facing surface, the end having: a first side close to a substrate; a second side located opposite to the first side; a third side connecting an end of the first side to an end of the second side; and a fourth side connecting the other end of the first side to the other end of the second side. The second side defines a track width. The end of the pole layer located in the medium facing surface has a width that decreases toward the first side. The pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic insulating material, with a nonmagnetic conductive film provided between the encasing layer and the pole layer. The pole layer incorporates: a first layer located closer to the surface of the groove; and a second layer located farther from the surface of the groove.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: May 31, 2011
    Assignee: Headway Technologies, Inc.
    Inventors: Yoshitaka Sasaki, Dong-Hong Li, Shigeki Tanemura, Hiroyuki Itoh
  • Publication number: 20110123710
    Abstract: To provide a process to improve acid resistance of a glass substrate for an information recording medium. A process for producing a glass substrate for an information recording medium, comprising processing a glass formed into a plate by a float process, a down-draw method or a press method, wherein, in cooling of the glass in the last step where the glass has a temperature of at least its strain point, the time during which the glass temperature is at least its strain point and at most a temperature where the glass viscosity is 1010 dPa·s is at least 13 minutes.
    Type: Application
    Filed: October 21, 2010
    Publication date: May 26, 2011
    Applicant: Asahi Glass Company, Limited
    Inventors: Jun ENDO, Tetsuya Nakashima
  • Patent number: 7947434
    Abstract: The process of forming a plated film according to the invention is designed such that the surface asperities of the inorganic film formed by the tracing of a standing wave occurring at the inner wall surface of the first opening in the resist at the resist pattern-formation step are reduced or eliminated. It is thus possible to form, efficiently yet in a short period of time, a high aspect-ratio plated film portion having an aspect ratio of greater than 1. In addition, the formed plated film quality is extremely improved for the absence of pores (cavities).
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: May 24, 2011
    Assignee: TDK Corporation
    Inventors: Akifumi Kamijima, Hitoshi Hatate, Hideyuki Yatsu
  • Patent number: 7941911
    Abstract: A method is provided for forming a plurality of regions of magnetic material in a substrate having a first approximately planar surface. The method comprises the steps of fabricating projections in the first surface of the substrate, depositing onto the first surface a magnetic material in such a way that the tops of the projections are covered with magnetic material, and depositing filler material atop the substrate so produced. The filler material may then be planarized, for example by chemical-mechanical polishing. In an alternative embodiment magnetic material is deposited on a substrate and portions of it are removed, leaving islands of material. Filler material is then deposited, which may be planarized.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: May 17, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Zvonimir Z. Bandic, Elizabeth Ann Dobisz, Jui-Lung Li, Henry Hung Yang
  • Patent number: 7936536
    Abstract: In a discrete track medium and a patterned medium, a meniscus adsorptive force is reduced and writing into adjacent tracks is prevented. A magnetic layer in lands or patterns in the discrete track medium or the patterned medium is formed into a cylindrical shelly or spherical shelly shape with a uniform thickness. Moreover, a height of cylindrical shelly land or a height of spherical shelly land is changed between 5 nm and 30 nm according to radial positions. Thus, an effect is achieved for providing a magnetic recording medium and a magnetic disk apparatus which are excellent in realizing higher recording density and higher reliability.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: May 3, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Ryuji Tsuchiyama, Masahumi Mochizuki, Kyosuke Ono, Yuko Tsuchiya, Hiroshi Ikekame
  • Patent number: 7921542
    Abstract: Certain example embodiments relate to a manufacturing method for a disk drive unit. At least one head gimbal assembly having first terminal pads is provided. A controlling circuit for controlling the at least one head gimbal assembly is provided, with the controlling circuit having second terminal pads to connect with the first terminal pads. The at least one head gimbal assembly is disposed in a motor base. The controlling circuit is disposed in the motor base. The at least one head gimbal assembly and the controlling circuit are tightened to the motor base such that the first and second terminal pads are face-to-face and have an electrical touch contact therebetween.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: April 12, 2011
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: YiuSing Ho, GuoHong Lu, CanHua Chen
  • Patent number: 7914845
    Abstract: A method of manufacturing for providing closer head-to-media spacing, and the resulting disk, includes evenly lubricating a magnetic media disk, increasing the viscosity of a selected non-data zone region of the disk, and removing at least a portion of the lower viscosity region of the lubrication layer in a data zone region of the disk, thereby decreasing the thickness of the lubrication layer in the data zone portion of the lower viscosity region, producing a magnetic media disk capable of closer head-to-media spacing in the data zone portion of the lower viscosity region of the lubrication layer than in the non-data zone portion.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: March 29, 2011
    Assignee: Seagate Technology LLC
    Inventor: Jeffrey Shane Reiter
  • Patent number: 7906170
    Abstract: An apparatus capable of producing a moveable magnetic field includes a moveable support structure (110) and a magnetic field source (120) supported by the moveable support structure, where the magnetic field source is in a fixed position relative to the moveable support structure. The magnetic field source generates a magnetic field at a wafer surface of at least approximately 50 Oersted, and the magnetic field is aligned so as to produce magnetic anisotropy in a plane of the moveable support structure.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: March 15, 2011
    Assignee: Intel Corporation
    Inventors: Adam J. Schafer, Arnel M. Fajardo, Chang-Min Park
  • Publication number: 20110059235
    Abstract: Provided are a method of producing a magnetic recording medium with improved environmental resistance, especially, corrosion resistance and an apparatus used therefor.
    Type: Application
    Filed: November 3, 2009
    Publication date: March 10, 2011
    Applicant: SHOWA DENKO K.K.
    Inventors: Masato FUKUSHIMA, Shinichi ISHIBASHI, Akira YAMANE
  • Patent number: 7900341
    Abstract: A high yield in a manufacture of an HDD having a high recording density and using a patterned medium by a trench-like or a dot-like pattern is realized. In this HDD manufacturing method, a magnetic field size (writing and reading) of a head in a head manufacturing process is measured in a head unit inspection process. According to the result of the measurement, the head is classified into a plurality of groups in a head classifying process. In a patterned medium manufacturing process, a plurality of types of the patterned media which are designed so as to correspond to the classified head groups are manufactured. In an HDD assembly process, the HDD is manufactured by combining the plurality of head groups and the plurality of patterned media following a predetermined rule.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: March 8, 2011
    Assignee: Hitachi, Ltd.
    Inventor: Yoshiteru Katsumura
  • Patent number: 7897200
    Abstract: The present invention provides a ferromagnetic/antiferromagnetic coupling film structure and a fabrication method thereof. The structure includes an antiferromagnetic layer of cobalt oxide having a thickness of 2 to 15 monolayers and formed on a substrate at a temperature ranging from 700K to 900K; and a ferromagnetic layer of cobalt having a thickness of at least one monolayer for being formed on the antiferromagnetic layer of cobalt oxide.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: March 1, 2011
    Assignee: National Chung Cheng University
    Inventors: Jyh-Shen Tsay, Chi-Wei Lee, Gung Chern
  • Patent number: 7895731
    Abstract: A method for manufacturing a magnetic field detecting element having a free layer whose magnetization direction is variable depending on an external magnetic field and a pinned layer whose magnetization direction is fixed and these are stacked with an electrically conductive, nonmagnetic spacer layer sandwiched therebetween, wherein sense current flows in a direction perpendicular to film planes of the magnetic field detecting element. The method comprises: forming a spacer adjoining layer adjacent to the spacer layer, Heusler alloy layer, and a metal layer successively in this order; and forming either at least a part of the pinned layer or the free layer by heating the spacer adjoining layer, the Heusler alloy layer, and the metal layer. The spacer adjoining layer has a layer chiefly made of cobalt and iron. The Heusler alloy layer includes metal which is silver, gold, copper, palladium, or platinum, or an alloy thereof. The metal layer is made of the same.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: March 1, 2011
    Assignee: TDK Corporation
    Inventors: Tomohito Mizuno, Yoshihiro Tsuchiya, Koji Shimazawa, Kei Hirata, Keita Kawamori
  • Patent number: 7891081
    Abstract: A process is described for the fabrication of a magnetic read head in which contact between the pinned layer and the AFM is limited to their edges. The principal steps are to deposit an antiferromagnetic layer and to then pattern it into a pair of antiferromagnetic layers separated by no more than about 2 microns. A layer of magnetic material that lies between, and is in contact with, said antiferromagnetic layers is then deposited, following which the layer of magnetic material is magnetized.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: February 22, 2011
    Assignee: Headway Technologies, Inc.
    Inventor: Glen Garfunkel
  • Publication number: 20110039020
    Abstract: Magnetic materials and uses thereof are provided. In one aspect, a magnetic film is provided. The magnetic film comprises superparamagnetic particles on at least one surface thereof. The magnetic film may be patterned and may comprise a ferromagnetic material. The superparamagnetic particles may be coated with a non-magnetic polymer and/or embedded in a non-magnetic host material. The magnetic film may have increased damping and/or decreased coercivity.
    Type: Application
    Filed: October 22, 2010
    Publication date: February 17, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Snorri Thorgeir Ingvarsson, Philip Louis Trouilloud, Shouheng Sun, Roger Hilsen Koch, David William Abraham
  • Publication number: 20110014363
    Abstract: An apparatus for manufacturing a magnetic recording medium is provided. The apparatus has a plurality of connected film forming chambers; a carrier for holding a substrate; a mechanism for placing the substrate on the carrier prior to forming a film; a mechanism for sequentially transferring the carriers into the connected film forming chambers; and a mechanism for removing the substrate from the carrier after the film is formed. The mechanism for transferring the carrier is a linear motor. Furthermore, a method for manufacturing the magnetic recording medium by using such apparatus is also provided.
    Type: Application
    Filed: February 26, 2009
    Publication date: January 20, 2011
    Applicant: SHOWA DENKO K.K.
    Inventor: Satoru Ueno
  • Patent number: 7862853
    Abstract: A method for manufacturing a magnetic recording medium with high reliability is provided, which can form a thin magnetic layer having a dry film thickness of, for example, 60 nm or less while the occurrence of defects on the surface is suppressed. In this method, a magnetic paint having a solid concentration NV (mass %) of 3?NV?8 is applied to a non-magnetic underlayer formed over a non-magnetic support to a wet film thickness Tw in a range of ?2300 (nm).
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: January 4, 2011
    Assignee: TDK Corporation
    Inventor: Hiroyuki Tanaka
  • Patent number: 7851014
    Abstract: Magnetic recording media having a magnetic layer with an easy magnetization axis lying about 35° out of plane of the magnetic layer is disclosed. This media has a reduced total magnetic layer thickness and higher signal, while improving the media signal-to-noise ratio (SNR).
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: December 14, 2010
    Assignee: Seagate Technology LLC
    Inventor: Thomas Patrick Nolan
  • Patent number: 7842334
    Abstract: A magnetic sensor includes a single substrate, a conventional GMR element formed of a spin-valve film including a single-layer-pinned fixed magnetization layer, and a SAF element formed of a synthetic spin-valve film including a plural-layer-pinned fixed magnetization layer. When the spin-valve film intended to act as the conventional GMR element and the synthetic spin-valve film intended to act as the SAF element are subjected to the application of a magnetic field oriented in a single direction at a high temperature, they become giant magnetoresistive elements whose magnetic-field-detecting directions are antiparallel to each other. Since films intended to act as the conventional GMR element and the SAF element can be disposed close to each other, the magnetic sensor which has giant magnetoresistive elements whose magnetic-field-detecting directions are antiparallel to each other can be small.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: November 30, 2010
    Assignee: Yamaha Corporation
    Inventors: Yukio Wakui, Masayoshi Omura
  • Publication number: 20100273030
    Abstract: A glass substrate for a magnetic disk, wherein, in regions with respect to two places arbitrarily selected on a surface of the glass substrate on its central portion side relative to its outer peripheral end, a surface shape with a shape wavelength in a band of 60 to 500 ?m is extracted from surface shapes in each of the regions and, assuming that a root mean square roughness Rq of the surface shape is given as a microwaviness Rq, the difference between the microwavinesses Rq of the regions is 0.02 nm or less or the difference between standard deviations of the microwavinesses Rq of the regions is 0.04 nm or less.
    Type: Application
    Filed: December 24, 2008
    Publication date: October 28, 2010
    Applicant: HOYA CORPORATION
    Inventors: Kouji KITSUNAI, Takashi MAEDA
  • Patent number: 7807218
    Abstract: A magnetic tunneling element is constructed from a MgO or Mg—ZnO tunnel barrier and an amorphous magnetic layer in proximity with the tunnel barrier. The amorphous magnetic layer includes Co and at least one additional element selected to make the layer amorphous. Magnetic tunnel junctions formed from the amorphous magnetic layer, the tunnel barrier, and an additional ferromagnetic layer have tunneling magnetoresistance values of up to 200% or more.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: October 5, 2010
    Assignee: International Business Machines Corporation
    Inventor: Stuart Stephen Papworth Parkin
  • Publication number: 20100246063
    Abstract: An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising preparing a melt by melting a starting material mixture comprising a hexagonal ferrite-forming component and a glass-forming component; rapidly cooling the melt to obtain an amorphous material comprising 0.3 to 2.0 weight percent of carbon atoms; heating the amorphous material to a temperature range of 580 to 700° C. and maintaining the amorphous material within the temperature range to precipitate hexagonal ferrite magnetic particles; and collecting the hexagonal ferrite magnetic particles precipitated.
    Type: Application
    Filed: March 30, 2010
    Publication date: September 30, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Shiho KAMISAWA, Toshio TADA, Nobuo YAMAZAKI
  • Patent number: 7802357
    Abstract: A method of forming a plating film capable of improving magnetic properties is provided. A photoresist pattern, having a first opening with an aspect ratio greater than 1 and a second opening with an aspect ratio smaller than that of the first opening, is formed on a surface of a substrate. A seed film is formed to cover an exposed surface of the substrate in the openings and an inner wall of the photoresist pattern in the openings. On the seed film in the openings, the plating film of magnetic material is deposited such that the first opening is filled under application of a magnetic field in the direction intersecting the surface of the substrate, and the second opening is filled under application of the magnetic field in the direction along the surface of the substrate.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: September 28, 2010
    Assignee: TDK Corporation
    Inventor: Akifumi Kamijima
  • Patent number: 7794783
    Abstract: A wear-resistant article of manufacture, such as a screen, is produced by the method of providing a screen having a front face, a rear face, and openings extending through the screen from the front face to the rear face, contacting at least a portion of the screen with a coating material comprising ferromagnetic or paramagnetic hard particles and a braze material, subjecting at least a portion of the screen to a magnetic field during at least a portion of the contacting step, and transforming the coating material to a wear-resistant coating comprising the hard particles distributed in the braze material.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: September 14, 2010
    Assignee: Kennametal Inc.
    Inventors: Vaishali Bhagwanbhai Patel, Donald W. Bucholz, Kevin Michael Singer
  • Patent number: 7794784
    Abstract: A method of forming a nanowire comprising: providing nanoparticles of a metallic material; providing a vapor of fluorocarbon molecules by heating a solid polymer; depositing at least some of the carbon of said molecules onto an exterior of one of said particles to form a deposit of carbon which surrounds at least part of the exterior of said one particle and assembling further of said particles with said one particle to form an elongate configuration of material in the form of a nanowire. Similar methods of production of nanotubes are also disclosed.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: September 14, 2010
    Assignee: BAE Systems plc
    Inventors: Sajad Haq, Ioannis Alexandrou, Gehan A J Amaratunga, Khai H Ang