Magnetic Materials Patents (Class 148/100)
  • Patent number: 10390425
    Abstract: A golden finger structure includes a golden finger set on a substrate, a transmission line coupled to the golden finger, and slots set on each golden finger. Adjacent slots are arranged in a opposite direction and reduce impedance discontinuity from the transmission line.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: August 20, 2019
    Assignee: NANNING FUGUI PRECISION INDUSTRIAL CO., LTD.
    Inventor: Siang-Wei Wang
  • Patent number: 10363548
    Abstract: The present invention provides amorphous bi-functional catalytic aluminum metallic glass particles having an aluminum metallic glass core and 2 or more transition metals disposed on the surface of the aluminum metallic glass core to form amorphous bi-functional aluminum metallic glass particles with catalytic activity.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: July 30, 2019
    Assignee: UNIVERSITY OF NORTH TEXAS
    Inventors: Santanu Das, Sundeep Mukherjee
  • Patent number: 10332662
    Abstract: An apparatus for, and a method of controlling magnetic anisotropy in a magnetic material comprises directing a layer of powdered metal material to a heat conducting substrate. Electromagnetic energy is applied to the powdered material sufficient to melt the powdered material which is subsequently cooled to create a solid layer on the substrate. An external magnetic field is applied to the material during at least the cooling step so as to imprint the solid magnetic material layer with magnetic anisotropy. Various novel magnetic structures can be fabricated using the technique.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: June 25, 2019
    Assignee: EXMET AB
    Inventors: Mattias Unosson, Björgvin Hjörvarsson, Vassilios Kapaklis, Fridrik Magnus
  • Patent number: 10316396
    Abstract: An iron-based soft magnetic alloy greater than 63.5 mm in width, a thickness between 13 and 20 microns and having a composition represented by the following formula: (Fe1-aMa)100-x-y-z-p-q-rCuxSiyBzM?pM?qXr wherein M is Co and/or Ni, M? is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti and Mo, M? is at least one element selected from the group consisting of V, Cr, Mn, Al, elements in the platinum group, Sc, Y, rare earth elements, Au, Zn, Sn and Re, X is at least one element selected from the group consisting of C, Ge, P, Ga, Sb, In, Be and As, and a, x, y, z, p, q and r respectively satisfy 0?a?0.5, 0.1?x?3, 0?y?30, 1?z?25, 5?y+z?30, 0.1?p?30, q?10 and r?10, the alloy being at least 50% crystalline with an average particle size of 100 nm or less. This alloy has low core loss, high permeability and low magnetostriction.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: June 11, 2019
    Assignee: Metglas, Inc.
    Inventors: Eric Alan Theisen, Naoki Ito, Ronald Joseph Martis, Donald Robert Reed, Jr., John Paul Webb
  • Patent number: 10195662
    Abstract: An example insulation enclosure includes a support structure having a top end, a top wall provided at the top end, a bottom end, and an opening defined at the bottom end for receiving a mold within an interior of the support structure. Rigid insulation material may be supported by the support structure and extending between the top and bottom ends and across the top end. The rigid insulation material may extend between the top and bottom ends and consist of one or more sidewall insulation loops that extend along a circumference of the insulation enclosure.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: February 5, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Clayton A. Ownby, Jeffrey G. Thomas, Michael Clark, Ronald Joy, Grant O. Cook, III, Garrett T. Olsen
  • Patent number: 9835695
    Abstract: A system includes a helically polarized magnet having a plurality of north and south poles circumferentially and helically patterned along a linear axis. Magnetic flux varies at different positions along a linear path in a direction aligned with the linear axis. A multi-axis magnetometer and/or magnetometer array is configured with at least two sensing coils to detect the position of the helically polarized magnet by sensing the magnetic flux variations at the different positions along the linear path.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: December 5, 2017
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Joseph Michael Maurio, Charles C. McCarthy, Mark Mulhern
  • Patent number: 9761361
    Abstract: A grain-oriented electrical steel sheet produces reduced noise when worked into a transformer, by setting length d of each plastic strain region in the widthwise direction of the steel sheet to 0.05 mm or more and 0.4 mm or less, and a ratio (?d/?w) of a total ?d of the length d to a total ?w of application interval w of each of the above plastic strain regions to 0.2 or more and 0.6 or less.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: September 12, 2017
    Assignee: JFE Steel Corporation
    Inventors: Seiji Okabe, Shigehiro Takajo, Takashi Kawano
  • Patent number: 9728310
    Abstract: The present invention discloses a short process preparation technology of sintered NdFeB magnets from the NdFeB sludge, which relates to a field of recycle technology of NdFeB sludge. The present invention comprises the following steps: water bath distillation of organics in sludge, ultrasonic cleaning, calcium reduction and diffusion, ultrasonic rinsing in a magnetic field and drying, powders mixing and sintering. NdFeB sludge as raw materials was directly prepared from recycled sintered magnets with high magnetic properties. Most of the organics in the sludge could be removed by a vacuum distillation process with stepwise heating. The ultrasonic rinsing process in a magnetic field could effectively remove the remaining organics. The recycled sintered magnets exhibited good maximum energy product [(BH)max] of 35.26 MGOe. The present invention has important features, such as the short processing time, efficient environmental protection, high recycling rate and effective utilization rate of rare earth metals.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: August 8, 2017
    Assignees: BEIJING UNIVERSITY OF TECHNOLOGY, ANHUI EARTH-PANDA ADVANCE MAGNETIC MATERIAL CO., LTD.
    Inventors: Ming Yue, Weiqiang Liu, Xiantao Li, Meng Li, Min Liu, Dongtao Zhang, Xiaowen Yin, Xiulian Huang, Jingwu Chen, Xiaofei Yi
  • Patent number: 9410234
    Abstract: Provided are a sputtering device and a method of forming a layer using the same. The method of forming a layer using the sputtering device includes: placing a substrate within a chamber; depositing target particles emitted from a target, which faces the substrate, on the substrate using a sputtering process; and horizontally moving a plurality of shield rods, which are installed in a shield mask disposed between the substrate and the target and are separated from each other along a first direction, during the sputtering process.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: August 9, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun Ju Kang, Sang Woo Sohn, Sang Won Shin, Dong Hee Lee, Chang Oh Jeong
  • Patent number: 9346123
    Abstract: A device reduces dust for safely preventing laser-irradiation capacity from decreasing due to contamination and reliably reducing iron loss of a grain oriented electrical steel sheet. The device improves iron loss properties of a grain oriented electrical steel sheet by irradiating its surface with laser to reduce iron loss, wherein, distance between a laser beam emission port and a laser irradiation point is L (mm); laser irradiation angle formed by a line linking the emission port and the irradiation point with respect to a direction vertical to the sheet is ? (°); and L?50, the emission port is positioned such that L and ? satisfy: 60?0.3L???60 when L?100; 40?0.1L???60 when 100<L?400; ??60 when L>400.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: May 24, 2016
    Assignee: JFE Steel Corporation
    Inventors: Seiji Okabe, Hiroi Yamaguchi, Takeshi Omura
  • Patent number: 8974608
    Abstract: A powder magnetic core with improved high frequency magnetic characteristics and reduced eddy current loss is manufactured by a manufacturing method including the steps of (a) providing coated soft magnetic particles which are particles composed of soft magnetic material which each have been coated with an insulating coating, and insulator particles; (b) forming a magnetic layer by press molding the coated soft magnetic particles in a mold assembly; (c) forming an insulator layer on the magnetic layer by press molding the insulator particles in the mold assembly; and (d) repeating the steps (b) and (c) to fabricate a laminate of alternating magnetic layers and insulator layers and provide the powder magnetic core.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: March 10, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Takayuki Hirose, Masaharu Edo, Akira Sato
  • Publication number: 20140338792
    Abstract: A grain-oriented electrical steel sheet allows for manufacture of a transformer that exhibits, when the steel sheet is applied to an iron core thereof, extremely low iron loss and extremely low noise properties, makes highly efficient use of energy, and can be used in various environments. The grain-oriented electrical steel sheet has a strain distribution in regions where closure domains are formed, when observed in a cross section in the rolling direction, with a maximum tensile strain in a sheet thickness direction being 0.45% or less, and with a maximum tensile strain t (%) and a maximum compressive strain c (%) in the rolling direction satisfying Expression (1): t+0.06?t+c?0.35??(1).
    Type: Application
    Filed: December 28, 2012
    Publication date: November 20, 2014
    Applicant: JFE Steel Corporation
    Inventors: Shigehiro Takajo, Ryuichi Suehiro, Hiroi Yamaguchi
  • Publication number: 20140299232
    Abstract: The present technology relates to a Ni—Mn—Ga magnetic shape memory (MSM) alloy including twin boundaries type 2, which are deviated approximately +/?2-4 degrees from (101) or equivalent crystallographic plane by rotation about [?101] or equivalent crystallographic direction. This technology relates also to an actuator, sensor and harvester including MSM element of this technology.
    Type: Application
    Filed: May 21, 2012
    Publication date: October 9, 2014
    Applicant: ADAPTIVE MATERIALS TECHNOLOGY - ADAPTAMAT OY
    Inventors: Yossef Ezer, Oleksii Sozinov, Ladislav Straka, Aleksandr Soroka, Nataliya Lanska
  • Patent number: 8845957
    Abstract: A method for producing a magnetizable metal shaped body comprising a ferromagnetic starting material that is present in powder and in particulate form, using the following steps: (a) first compaction of the starting material (S3) such that adjoining particles become bonded to each other by means of positive adhesion and/or integral bonding in sections along the peripheral surfaces thereof and while forming hollow spaces, (b) creating an electrically isolating surface coating on the peripheral surfaces of the particles in regions outside the joining sections (S4), and (c) second compaction of the particles (S5) provided with the surface coating, such that the hollow spaces are reduced in size or eliminated.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: September 30, 2014
    Assignees: ETO Magnetic GmbH, Kennametal Europe GmbH
    Inventors: Paul Guempel, Stefan Glaeser, Beat Hofer
  • Patent number: 8836458
    Abstract: A magnetic torque sensing device having a disk-shaped member with a magnetoelastically active region. The magnetoelastically active region has oppositely polarized magnetically conditioned regions with initial directions of magnetization that are perpendicular to the sensitive directions of magnetic field sensor pairs placed proximate to the magnetically active region. Magnetic field sensors are specially positioned in relation to the disk-shaped member to accurately measure torque while providing improved RSU performance and reducing the detrimental effects of compassing.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: September 16, 2014
    Assignee: Methode Electronics, Inc.
    Inventor: Seong-Jae Lee
  • Patent number: 8821649
    Abstract: Characteristics of a magnetic material are improved without using a heavy rare earth element as a scarce resource. By incorporating fluorine into a magnetic powder and controlling the crystal orientation in crystal grains, a magnetic material securing magnetic characteristics such as coercive force and residual flux density can be fabricated. As a result, the resource problem with heavy rare earth elements can be solved, and the magnetic material can be applied to magnetic circuits that require a high energy product, including various rotating machines and voice coil motors of hard discs.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: September 2, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takayuki Kanda, Matahiro Komuro, Hiroyuki Suzuki, Yuichi Satsu
  • Patent number: 8657967
    Abstract: The present invention is related to process for producing an amorphous Fe-based bulk metallic glass product, formed of an alloy having a chemical formula of Fe100-a-b-c-d-x-y MaNbbSicBdIxJy wherein: • M is Co and/or Ni, •I is one or more elements of the group consisting of Al, Cr, Cu, Mn, C and P, •J is one or more elements of the group consisting of Ti, S, N and O and wherein a, b, c, d, x and y are satisfying the following conditions: 0 wt. %<a?46. 1 wt. %, 5.4 wt. %?b?12.4 wt. %, 2.2 wt. %?c?4.4 wt. %, 2 wt. %<d?6 wt. %, x?2 wt. % and y?0.2 wt. %, the process comprising the steps of producing a master alloy by melting starting materials, comprising Fe-containing alloys, and by melting said master and pouring the molten alloy into a mold.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: February 25, 2014
    Assignee: OCAS Onderzoekscentrum voor Aanwending van Staal N.V.
    Inventors: Daniel Ruiz Romera, Serge Claessens, Marc De Wulf, Nele Van Steenberge, Joachim Antonissen
  • Publication number: 20140041761
    Abstract: The present invention relates to a method for producing magnetic shape memory alloy wherein the method includes surface treatment of the surface of the alloy. This invention relates also to an MSM device, for example an actuator, sensor or energy harvester including an actuating element produced using the method.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 13, 2014
    Applicant: ADAPTIVE MATERIALS TECHNOLOGY - ADAPTAMAT OY
    Inventors: Yossef Ezer, Aleksandr Soroka, Ladislav Straka
  • Patent number: 8629748
    Abstract: Provided are a small wire-wound inductor having desired inductor characteristics, while allowing for high-density mounting and low-height mounting on circuit boards at the same time, as well as a method for manufacturing such wire-wound inductor which has a drum-shaped core member constituted by an assembly of soft magnetic alloy grains containing iron (Fe), silicon (Si) and 2 to 15 percent by weight of chromium (Cr), a coil conductive wire wound around the core member, a pair of terminal electrodes connected to the terminals of the coil conductive wire, and an outer sheath member covering the wound coil conductive wire and constituted by a magnetic powder-containing resin having a specified magnetic permeation ratio.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: January 14, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Yoshinari Nakada, Koichiro Wada, Yuichi Kasuya, Masanori Takahashi, Masashi Kuwahara, Tetsuo Kumahora
  • Patent number: 8574380
    Abstract: The present invention discloses a composite magnetic material. The composite magnetic material may comprise an Nd—Fe—B alloy and a Fe-based soft magnetic alloy having the general formula of Fe100-x-y-z-aAxRaSiyBz. A may be at least one element selected from Cu and Au. R may be at least one element selected from the group consisting of Ti, Zr, Hf, Mo, Nb, Ta, W and V. And the x, a, y, and z may satisfy: 0?x?3, 0?a?10, 0?y?20 and 2?z?25. The present invention further discloses a method of preparing the composite magnetic material as described above. According to the present invention, the composite magnetic material may have an enhanced magnetic energy product and residual magnetism respectively.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 5, 2013
    Assignee: BYD Company Limited
    Inventors: Qing Gong, Xin Du, Xiaofeng Cheng
  • Patent number: 8424314
    Abstract: The present invention relates to new intermetallic compounds having a crystalline structure of Ni3Sn2 type for the magnetic refrigeration, their use and a process for preparing the same. The present invention further relates to new magnetocaloric compositions for the magnetic refrigeration and their use.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: April 23, 2013
    Assignee: Universite Henri Poincare Nancy 1
    Inventor: Thomas Mazet
  • Patent number: 8404141
    Abstract: A rare earth bonded magnet is provided which is produced such that a mixture which comprises: a rare earth magnet powder; a resin binder comprising a thermosetting resin; an organic phosphorus compound; and a coupling agent is compress-molded, heated and cured, wherein the organic phosphorus compound and the coupling agent are represented by the following respective chemical formulas (structural formulas):
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: March 26, 2013
    Assignee: Minebea Co., Ltd.
    Inventors: Noboru Menjo, Kinji Uchiyama, Yuki Takeda
  • Patent number: 8330055
    Abstract: The present invention provides a magnetic composite capable of enhancing the effect of shielding against electromagnetic noise and the like (magnetic shielding effect) while inhibiting a possible eddy current, and a method for producing the magnetic composite, and a shielding structure comprising the magnetic composite. A shielding member 10 as a magnetic composite contains a resin 12 which is an insulator and serves as a matrix material and into which fine powders of an amorphous metal magnetic substance 10a containing Fe, Si, and B are mixed. In the shielding member 10, a plurality of the amorphous metal magnetic substances 10a are contained in the resin 12 at a volume fraction less than a percolation threshold. The type of the amorphous metal magnetic substance 10a is not particularly limited provided that the amorphous metal contains Fe, Si, and B.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: December 11, 2012
    Assignee: Empire Technology Development LLC
    Inventors: Tomoaki Ueda, Masanori Abe
  • Patent number: 8137593
    Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: March 20, 2012
    Assignee: Electromagnetics Corporation
    Inventor: Christopher J. Nagel
  • Publication number: 20120050920
    Abstract: According to one embodiment, a method of manufacturing a magnetoresistive element includes a layered structure and a pair of electrodes, the layered structure including a cap layer, a magnetization pinned layer, a magnetization free layer, a spacer layer and a functional layer provided in the magnetization pinned layer, between the magnetization pinned layer and the spacer layer, between the spacer layer and the magnetization free layer, in the magnetization free layer, or between the magnetization free layer and the cap layer and including an oxide, the method including forming a film including a base material of the functional layer, performing an oxidation treatment on the film using a gas containing oxygen in a form of at least one selected from the group consisting of molecule, ion, plasma and radical, and performing a reduction treatment using a reducing gas on the film after the oxidation treatment.
    Type: Application
    Filed: July 19, 2011
    Publication date: March 1, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akihiko Takeo, Yoshihiko Fuji, Hiromi Yuasa, Michiko Hara, Shuichi Murakami, Hideaki Fukuzawa
  • Publication number: 20110168799
    Abstract: A magnetic component for a magnetically actuated fuel injection device is formed of a corrosion resistant soft magnetic alloy consisting essentially of, in weight percent, 3%<Co<20%, 6%<Cr<15%, 0%?S?0.5%, 0%?Mo?3%, 0%?Si?3.5%, 0%?Al?4.5%, 0%?Mn?4.5%, 0%?Me?6%, where Me is one or more of the elements Sn, Zn, W, Ta, Nb, Zr and Ti, 0%?V?4.5%, 0%?Ni?5%, 0%?C<0.05%, 0%?Cu<1%, 0%?P<0.1%, 0%?N<0.5%, 0%?O<0.05%, 0%?B<0.01%, and the balance being essentially iron and the usual impurities.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 14, 2011
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventor: Joachim GERSTER
  • Patent number: 7880573
    Abstract: A method for reducing a temperature rise of a magnetic material is provided. The method includes applying force to the magnetic material to reduce a dimensional change of the magnetic material during a first part of an operation cycle, such as due to magnetostriction. The force is removed from the magnetic material during a second part of an operation cycle, allowing magnetostrictive dimensional changes to occur.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: February 1, 2011
    Assignee: iGo, Inc.
    Inventors: Bryan Wayne McCoy, Jason Walter Swanson
  • Patent number: 7771546
    Abstract: An object of the present invention is to solve the problem in hot workability caused by Cu aggregation and provide semi-hard magnetic materials having good magnetic properties, bias materials for magnetic markers, magnetic markers and production methods of bias materials for magnetic markers. The present invention provides a semi-hard magnetic material including 2.0%?Cu?10.0% and 0.1%?Nb?5.0% by mass %, the balance being Fe and inevitable impurities, and having a microstructure in which Cu phase and an intermetallic compound of Fe and Nb are dispersed. The semi-hard magnetic material of the present invention is suitable as bias materials for magnetic markers. Furthermore, the bias materials for magnetic markers can be formed by disposing bias materials for magnetic markers mentioned above so that a bias magnetic field may be applied to a magnetostrictive element for a magnetic marker.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: August 10, 2010
    Assignee: Hitachi Metals, Ltd.
    Inventors: Noriyuki Nakaoka, Shinichiroh Yokoyama, Yoshiyuki Fujihara
  • Patent number: 7704403
    Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: April 27, 2010
    Assignee: Electromagnetic Corporation
    Inventor: Christopher J. Nagel
  • Patent number: 7547367
    Abstract: The invention relates to a method for producing magnetically active shape memory metal alloy, said metal alloy containing nickel, manganese and gallium. In the method, the different components of the metal alloy are melted, and the melt is homogenized essentially at the melting temperature; the obtained metal alloy is cast, and the cast metal alloy is subjected to directional solidification at 10-100° C. below the liquidus temperature of said metal alloy.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: June 16, 2009
    Assignee: Outotec Oyj
    Inventors: Tuija Suortti, Juha Järvi, Pekka Taskinen
  • Publication number: 20090114316
    Abstract: The present invention provides a method of production of grain-oriented electrical steel sheet greatly reducing the Watt loss of the grain-oriented electrical steel sheet and making the magnetostriction as small as possible, that is, a method of production of grain-oriented electrical steel sheet with small magnetostriction by improving the magnetic properties by irradiation by a finely focused laser beam comprising using a power modulated laser controlled in maximum power density to 1×102 to 1×104 W/mm2 to optimize the amount of strain given by laser irradiation in both the sheet width direction and rolling direction and, in particular, to make the modulation duty 70% to less than 100%.
    Type: Application
    Filed: March 28, 2007
    Publication date: May 7, 2009
    Inventors: Tatsuhiko Sakai, Hideyuki Hamamura
  • Patent number: 7479621
    Abstract: A heat exchange system and processes for a magnetic annealing tool is provided. The system includes a process chamber housing workpieces to be processed; an element chamber partly surrounding the periphery of the process chamber, at least one vacuum for drawing a vacuum in fluid communication with the process chamber and separately with the element chamber in order to apply a vacuum to either or both of the process and element chamber so as to promote radiation heating of the workpieces; at least one supply of fluid in communication with the process chamber and separately with the element chamber to supply a cooling gas so as to promote conductive cooling of the workpieces; a cooling chamber disposed to surround the element chamber; and magnetic field generator for generating a magnetic field disposed on the outer periphery of the cooling chamber.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: January 20, 2009
    Assignee: Praxair Technology, Inc.
    Inventors: Richard John Jibb, John Fredric Billingham, Edward Duffy, Noel O'Shaughnessy, Kevin McMahon, Peter Ferris
  • Patent number: 7469604
    Abstract: A sensor includes a shaft and a magnetic sensor. The shaft may have at least one magnetized active region. The magnetic sensor may be configured to sense a magnetic field about the shaft, and may provide an output representative of torque applied to the shaft, shaft rotational speed and shaft rotational position.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: December 30, 2008
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Patent number: 7425353
    Abstract: Magnetic medium recording performance can be enhanced by irradiating a magnetic medium with ions having an acceleration voltage of between 10 keV and 100 keV to induce exchange coupling between grains of the magnetic medium. The magnetic medium is exposed to a cumulative ion dosage of between 1013 ions/cm2 and 1017 ions/cm2 using a non-patterned exposure of the magnetic medium. The ions can be selected from the group consisting of H+, He+, Ne+, Ar+, Kr+, and Xe+. Alternatively, the ions can be selected from the group consisting of Ga+, Hg+, and In+.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: September 16, 2008
    Assignee: International Business Machines Corporation
    Inventors: Manfred Albrecht, Charles Thomas Rettner, Bruce David Terris, Thomas Thomson
  • Publication number: 20080142121
    Abstract: Embodiments of the present disclosure are directed to an Fe-based amorphous magnetic alloy and method that includes 4 at. % or less of a low temperature annealing-enabling element M and 10 at. % or less of nickel (Ni). The total amount of the low temperature annealing-enabling element M and nickel (Ni) may be 2 at. % or more and 10 at. % or less.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 19, 2008
    Applicant: Alps Electric Company, Ltd.
    Inventors: Hisato Koshiba, Keiko Tsuchiya, Kinshiro Takadate
  • Patent number: 7363827
    Abstract: A torque sensor includes a shaft and a magnetic sensor. The shaft may have at least one active region having an elliptical magnetization. The magnetic sensor may be configured to sense a magnetic field about the shaft, where the magnetic field is representative of a torque applied to the shaft. The elliptical magnetization may have a nonzero axial component directed along a center line axis of said shaft at zero torque.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: April 29, 2008
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Kayvan Hedayat, Norman Poirier
  • Publication number: 20070261764
    Abstract: A magnetization apparatus for magnetizing a magnetic material provided inside a yoke housing of a motor, which has a connector portion radially outward of the yoke housing, includes at least one pair of magnetization cores and a plurality of magnetization coils. The at least one pair of magnetization cores are provided to oppose to each other, wherein the at least one pair of magnetization cores have corresponding magnetization surfaces, which oppose to each other. The plurality of magnetization coils generate a magnetic field at the at least one pair of magnetization cores, wherein the plurality of magnetization coils magnetize the magnetic material in a state, where the yoke housing is provided between the magnetization surfaces. The at least one pair of magnetization cores defines a receiving recess therein for receiving the connector portion of the motor in the state, where the yoke housing is provided between the magnetization surfaces.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 15, 2007
    Applicant: ASMO CO., LTD.
    Inventor: Tomomi Nakamura
  • Publication number: 20070200464
    Abstract: A stator is constructed by winding excitation coils around respective main poles. A rotor is constructed by fixing a first rotor unit, which consists of a pair of rotor cores and a magnetic material sandwiched between the rotor cores, and a second rotor unit, which has the same construction as the first rotor unit, to a rotation shaft. The rotor is assembled to the stator to form an assembled body. The magnet material of the first rotor unit is magnetized in the axial direction by a magnetizing flux passing through a half of the assembled body in the axial direction. The magnet material of the second rotor unit is magnetized in the axial direction in an opposite polarity by a magnetizing flux passing through the remaining half of the assembled body in the axial direction.
    Type: Application
    Filed: February 22, 2007
    Publication date: August 30, 2007
    Applicant: JAPAN SERVO CO., LTD.
    Inventors: Masafumi Sakamoto, Toru Kobayashi, Masahiko Azegami, Yasuaki Motegi, Takaya Kato, Shoji Oiwa, Yasuo Matsuda, Kazuo Onishi, Tadashi Fukushima, Norimoto Tanaka
  • Patent number: 7238297
    Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: July 3, 2007
    Assignee: Electromagnetics Corporation
    Inventor: Christopher J. Nagel
  • Patent number: 7230514
    Abstract: Inductive component (10; 20; 30) having at least one coil (12; 22; 32) and a magnetically soft core (11; 21; 31) made from a ferromagnetic powder composite in which the ferromagnetic powder composite shows an alloy powder mixture made from alloy powders having formanisotropic as well as formisotropic powder particles and a casting resin.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: June 12, 2007
    Assignee: Vacuumschmelze GmbH & Co KG
    Inventor: Markus Brunner
  • Patent number: 7192491
    Abstract: In order to dampen magnetization changes in magnetic devices, such as magnetic tunnel junctions (MTJ) used in high speed Magnetic Random Access Memory (MRAM), a transition metal selected from the 4d transition metals and 5d transition metals is alloyed into the magnetic layer to be dampened. In a preferred form, a magnetic permalloy layer is alloyed with osmium (Os) in an atomic concentration of between 4% and 15% of the alloy.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: March 20, 2007
    Assignee: International Business Machines Corporation
    Inventors: Snorri T. Ingvarsson, Roger H. Koch, Stuart S. Parkin, Gang Xiao
  • Patent number: 7144642
    Abstract: A ferrite magnet obtained by adding a ferrite having a hexagonal W-type magnetoplumbite structure to a ferrite having a hexagonal M-type magnetoplumbite structure, in which a portion of Sr, Ba, Pb or Ca is replaced with at least one element that is selected from the group consisting of the rare-earth elements (including Y) and Bi and that always includes La, during the fine pulverization process thereof. By adding a small amount of the element such as Co, Ni, Mn or Zn to the ferrite already having the hexagonal M-type magnetoplumbite structure during the fine pulverization process thereof, the magnetic properties can be improved.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: December 5, 2006
    Assignee: Neomax Co., Ltd.
    Inventors: Etsushi Oda, Seiichi Hosokawa, Sachio Toyota
  • Patent number: 7089648
    Abstract: There is provided a magnetoresistive head which can realize high sensitivity and low noise even when the reading track is being reduced. Longitudinal biasing is performed to a ferromagnetic free layer whose magnetization is rotated according to an external magnetic field by providing unidirectional magnetic anisotropy by exchange coupling to an antiferromagnetic layer. A hard magnetic film is arranged at the edge of a magnetoresistive film to reduce an effective reading track width.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: August 15, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kenichi Meguro, Hisashi Kimura, Katsuro Watanabe
  • Patent number: 7056599
    Abstract: A steel sheet for a magnetic shield comprising less than 0.005% by weight of C and 0.0003 to 0.01% by weight of B, and having a thickness of 0.05 to 0.5 mm and an anhysteresis magnetic permeability of 7500 or more.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: June 6, 2006
    Assignees: JFE Steel Corporation, Sony Corporation
    Inventors: Reiko Sugihara, Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Satoshi Kodama, Kenji Tahara, Yasuyuki Takada, Ken-ichi Mitsuzuka
  • Patent number: 6960240
    Abstract: Rare earth magnet scrap and/or sludge is remelted for reuse. Once a rare earth-free magnet-constituent metal feed is loaded in a melting furnace and heated into a melt, a rare earth-containing metal feed and the rare earth magnet scrap and/or sludge are added to the melt, a particulate flux of an alkali metal, alkaline earth metal or rare earth metal halide and having an average particle size of 1-50 ?m, preferably wrapped in a metal foil, is added to the melt, and the resulting mixture is melted, from which an alloy ingot is obtained. The valuable elements in the scrap and/or sludge can be recycled. Better separation between the slag and the molten metal ensures that the ingot is obtained from the melt in a high yield.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: November 1, 2005
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Koichi Hirota, Takehisa Minowa
  • Patent number: 6941637
    Abstract: The method of manufacturing rare earth thick film magnet comprising a step of forming an alloy layer of 30-100 ?m thick having a general formula RXBYTMZ on a substrate by a physical deposition process, and a step of heat-treating the alloy layer to form a thick film magnetic layer having R2TM14B phase as a main phase. In the general formula, R is at least one of rare earth elements, B is boron, TM is iron or its alloy partly substituted by cobalt. X is 0.1-0.2, Y is 0.05-0.2 and Z=1-X-Y. Further, the method of the present invention includes a step of laminating a plurality of alloy layers formed on a substrate together with the substrate. A motor comprising rare earth thick film magnet of the present invention is extremely small while obtaining high output.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: September 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hirotoshi Fukunaga, Masaki Nakano, Fumitoshi Yamashita
  • Publication number: 20040258436
    Abstract: The long magnet includes a magnet block made of a mixture of rare earth magnetic powder, thermoplastic resin particles, fluidity additive, pigment, wax and charge control agent, and a reinforcing member to reinforce the magnet block. At least part of the reinforcing member is arranged inside of the magnet block.
    Type: Application
    Filed: April 8, 2004
    Publication date: December 23, 2004
    Inventors: Makoto Nakamura, Mieko Kakegawa, Sumio Kamoi, Tsuyoshi Imamura, Kyohta Koetsuka, Noriyuki Kamiya
  • Publication number: 20040245492
    Abstract: A ferroelectric material for forming a ferroelectric that is described by a general formula ABO3, includes an A-site compensation component which compensates for a vacancy of an A site, and a B-site compensation component which compensates for a vacancy of a B site.
    Type: Application
    Filed: March 24, 2004
    Publication date: December 9, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yasuaki Hamada, Takeshi Kijima, Junichi Karasawa, Koji Ohashi, Eiji Natori
  • Patent number: RE40348
    Abstract: A thin arc segment magnet made of a an R-T-B based, rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe T, wherein R is at least one rare earth element including Y, and T is Fe or Fe and Co, which has an oxygen content of 0.3 weight % or less, a density of 7.56 g/cm3 or more, a coercivity iHc of 1.1 MA/m (14 kOe) or more at room temperature, and an orientation Br/4?Imax of 96% or more in an anisotropy-providing direction at room temperature can be produced by using a slurry mixture formed by introducing fine alloy powder of the above composition into a mixture liquid comprising 99.7-99.99 parts by weight of a mineral oil, a synthetic oil or a vegetable oil and 0.01-0.3 parts by weight of a nonionic surfactant and/or an anionic surfactant.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: June 3, 2008
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hisato Tokoro, Kimio Uchida, Kazuo Oda, Tsukasa Mikamoto
  • Patent number: RE40524
    Abstract: The magnet powder-resin compound particles substantially composed of rare earth magnet powder and a binder resin are in such a round shape that a ratio of the longitudinal size a to the transverse size b (a/b) is more than 1.00 and 3 or less, and that an average particle size defined by (a/b)/2 is 50-300 ?m. They are produced by charging a mixture of rare earth magnet powder and a binder resin into an extruder equipped with nozzle orifices each having a diameter of 300 ?m or less; extruding the mixture while blending under pressure though the nozzle orifices to form substantially cylindrical, fine pellets; and rounding the pellets by rotation.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: September 30, 2008
    Assignee: Hitachi Metals, Ltd.
    Inventors: Katsunori Iwasaki, Kazunori Tabaru