Defined Magnetic Layer Patents (Class 428/692.1)
  • Publication number: 20090017279
    Abstract: An electromagnetic wave suppressing sheet according to the invention is a sheet including a magnetic powder and an insulating material. A real part of a permittivity in an in-plane direction of the sheet is about 200 or more, and an imaginary part thereof is about 25 or more. Accordingly, it is possible to obtain an electromagnetic wave absorbing sheet which exhibits an excellent electric wave absorption characteristic in which an absorption amount of electromagnetic waves is large in an in-plane direction of the sheet.
    Type: Application
    Filed: June 20, 2008
    Publication date: January 15, 2009
    Inventors: Takao Mizushima, Seiichi Abiko, Kyoichi Kawase, Toshio Takahashi, Satoshi Maruyama
  • Patent number: 7474094
    Abstract: Methods of reorienting ferromagnetic layers of a plurality of magnetoresistive elements and structures formed by the methods. The plurality of magnetoresistive elements, preferably GMR multilayer elements, are manufactured and arranged on a planar substrate. The method effectively allows selective orientation and reorientation of distinct ferromagnetic layers of a subset of the magnetoresistive elements on the substrate. The methods make either use of subsequent annealing processes making use of magnetic fields pointing in different directions. Prior to application of a subsequent annealing process, a complimentary subset of magnetoresistive elements is effectively shielded by selective deposition of a soft-magnetic shielding layer. Alternatively, a single annealing process can be performed when an externally applied magnetic field is locally modified by soft-magnetic structures, such as fluxguides.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 6, 2009
    Assignee: International Business Machines Corporation
    Inventors: Johannes Paul, Rolf Schaefer
  • Publication number: 20090004451
    Abstract: A composite comprises a substrate and a fluoride, oxide, nitride or boride of a substantially non-magnetic cation on the substrate, the composite exhibiting ferromagnetic properties at room temperature. The composite may be in the form of a film.
    Type: Application
    Filed: July 28, 2005
    Publication date: January 1, 2009
    Inventors: John Michael Coey, Munuswamy Venkatesan, Ciara Bridget Fitzgerald
  • Patent number: 7445852
    Abstract: A heat treatment was carried out in a pressurized condition on an amorphous metal ribbon containing Fe and Co as main components and being represented by the general formula: (Co(1?c)Fec)100?a?bXaYb. (In the formula, X represents at least one species of element selected from Si, B, C and Ge, Y represents at least one species of element selected from Zr, Nb, Ti, Hf, Ta, W, Cr, Mo, V, Ni, P, Al, Pt, Rh, Ru, Sn, Sb, Cu, Mn and rare earth elements, c, a and b satisfy 0?c?1.0, 10<a?35 and 0?b?30, respectively, and a and b are represented in terms of atomic %.) By carrying out a heat treatment in a pressurized condition in the same manner on a magnetic substrate comprising an amorphous metal ribbon and a heat resistant resin or a laminate of the substrates, not only the magnetic properties but also the mechanical properties and the processability are improved.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: November 4, 2008
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Nobuhiro Maruko, Mitsunobu Yoshida, Hiroshi Watanabe, Takashi Ono, Hidenobu Nogi, Tomoyuki Nakata
  • Patent number: 7435485
    Abstract: A magnetic material comprises 50-80 wt % of Cobalt, 9-15 wt% of Nickel, 10-25 wt% of Rhenium, 0.1 to 2.0 wt% of Phosphorus, and 5-10 wt % of Tungsten or Platinum. It can be formed as a layer having good vertical magnetic properties (e.g. when magnetised it can provide a high magnetic field strength in the direction perpendicular to the plane of the layer). The layer preferably has a thickness of above 1 ?m. It can be formed by electroplating. The layer is useful for inclusion in a MEMS device.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: October 14, 2008
    Assignee: Sony Corporation
    Inventors: Wei Beng Ng, Akio Takada
  • Patent number: 7404915
    Abstract: An objective is to provide an electromagnetic wave shielding material exhibiting an excellent electromagnetic wave shielding property, and also to provide a manufacturing method with quick and simple processing, in which a thin-line-state picture image can easily be formed. An electromagnetic wave shielding material exhibiting an excellent near-infrared shielding property can further be provided if desired. Disclosed is an electromagnetic wave shielding material possessing a support and provided thereon, a conductive metal layer, wherein the conductive metal layer satisfies at least one of the following conditions; (1) a void ratio of the conductive metal layer is 0.1-15%, (2) Glossiness of the conductive metal layer is 50-300%, and (3) Center line average surface roughness (Ra) of the conductive metal layer is 1-50 nm.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: July 29, 2008
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Narito Goto, Takeshi Habu
  • Patent number: 7390580
    Abstract: A method of preventing particles of elastomeric material employed as seals or spacers in a sanitary piping system from entering the product stream, comprising applying an effective amount of comminuted iron powder to the elastomeric base material prior to forming said material into said seals or spacers, magnetically sensing said particles in said piping system; and responsive to said magnetic sensing diverting a portion of said product stream containing said particles.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: June 24, 2008
    Assignee: Rubber Fab Gasket & Molding, Inc.
    Inventor: Robert Dupont
  • Publication number: 20080129462
    Abstract: Composite materials that include a resin containing a polymer obtained by polymerizing a monomer mixture that contains at least one polymerizable monomer and a magnetic material, where the composite material can be used to make sheet stock and articles, such as storage containers. The composite materials can be made by mechanical milling the magnetic material into the resin or by using bulk, suspension, emulsion, mini-emulsion or micro-emulsion polymerization techniques where the resin is formed in the presence of the magnetic material. Articles made of the composite material can be used in a method of deterring theft of an article which includes providing the above-described container, applying a magnetic field to an interrogation zone, causing movement of the container into the interrogation zone, and detecting a magnetic response resulting from the container moving into the interrogation zone.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 5, 2008
    Applicant: NOVA CHEMICALS INC.
    Inventors: Eric Vignola, Richard J. Burns
  • Patent number: 7374826
    Abstract: Magnetic field structures composed of stacked magnetic laminae that are magnetically oriented perpendicular to their planes and configured to cause a volume charge density and cancel the field effects of unwanted surface negative charges are provided. This arrangement causes a uniform volume magnetic charge density, which results in a magnetic field normal to the laminae. The stacked magnetic laminae magnetic field structure cancel the field effects of the deleterious unwanted surface charges because these surface charges are so situated that their contributions to the internal magnetic field mutually cancel each other, and thus they are no longer detrimental to the magnetic field created by the volume charge density. One embodiment provides a planar magnetic field gradient source structure.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: May 20, 2008
    Assignee: The United States of America as represented by the Sceretary of the Army
    Inventor: Herbert A. Leupold
  • Patent number: 7371471
    Abstract: An electromagnetic noise suppressing thin film has a structure including an inorganic insulating matrix made of oxie, nitride, fluoride, or a mixture thereof and columnar-structured particles made of a pure metal of Fe, Co, or Ni or an alloy containing at least 20 weight % of Fe, Co, or Ni and buried in an inorganic insulating matrix.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: May 13, 2008
    Assignee: NEC TOKIN Corporation
    Inventors: Shigeyoshi Yoshida, Hiroshi Ono, Yutaka Shimada, Tetsuo Itoh
  • Patent number: 7369336
    Abstract: A master carrier for magnetic transfer having a data region and a servo pattern region that has a pattern of fine projections arrayed in the track direction thereof in accordance with the preformat signal information to be transferred onto an in-plane magnetic recording medium is disclosed. The data region has a projection formed of a material such as carbon-based material that differs from the material of the servo pattern region.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: May 6, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Hideyuki Kubota, Akito Kamatani, Masakazu Nishikawa
  • Publication number: 20080090079
    Abstract: An embodiment of the present invention is a technique to fabricate a device having a magnetic material. A nano-particle colloid is formed in a plating bath of an aqueous solution. The nano-particle colloid has magnetic nano-particles made of magnetic ferrite material. A seed layer is deposited on a substrate. A composite film containing the magnetic nano-particles is deposited on the seed layer using the plating bath.
    Type: Application
    Filed: September 28, 2006
    Publication date: April 17, 2008
    Inventors: Arnel M. Fajardo, Chang-Min Park
  • Publication number: 20080075974
    Abstract: A technique includes forming overlaying magnetic metal layers over a semiconductor substrate. The technique includes forming at least one resistance layer between the magnetic metal layers.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 27, 2008
    Inventors: Arnel M. Fajardo, Ebrahim Andideh, Changmin Park, Patrick Morrow
  • Publication number: 20070269682
    Abstract: A film usable for displaying visual information is provided. The film may include a polymeric substrate and a ferromagnetic coating on a first surface of the substrate. The coating may enable attachment of the film to any magnetic surface and the second surface of the substrate may be use for carrying the visual information, such as advertisement, manually written information, scenery backdrop, wall design and the like.
    Type: Application
    Filed: May 16, 2007
    Publication date: November 22, 2007
    Inventors: Rina Lupu Matas, Uri Sharfberg, Gal Wollach, Yoash Carmi
  • Publication number: 20070269681
    Abstract: A high-frequency magnetic material comprises an artificial medium having a structure in which a plurality of unit particles align in a matrix medium, wherein the unit particle is composed of a split ring type conductor, or a combination of the split ring type conductor and a dielectric material, and the matrix medium contains a magnetic material.
    Type: Application
    Filed: May 9, 2007
    Publication date: November 22, 2007
    Inventors: Fumihiko AIGA, Seiichi Suenaga, Maki Yonetsu
  • Publication number: 20070259210
    Abstract: A structure has a substrate and a layer containing a magnetic material dispersed in a nonmagnetic material, the magnetic material being comprised of first crystal particles having an easy magnetization axis crytsllographically oriented in the direction of the normal line of the substrate and forming columns perpendicular to the substrate and second crystal particles having a crystallographic orientation in a direction different from the direction of the crystallographic orientation in the first crystal particles, and the ratio of the second crystal particles to the entire crystal particles in the columns ranging from 10% to 50% by weight.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 8, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shigeru Ichihara, Toru Den
  • Patent number: 7288333
    Abstract: A soft magnetic film of the present invention is a plated film composed of Co and Fe, and columnar crystals extending in the film thickness direction are provided. In the present invention, columnar crystals extending in the film thickness direction are provided so that an improvement in the surface roughness of the film surface and an improvement in the corrosion resistance can be achieved. Furthermore, the saturation magnetic flux density Bs can also be improved by making the crystal fine and eliminating the need for addition of the noble metal element. That is, according to a CoFe alloy of the present invention, both the corrosion resistance and the saturation magnetic flux density Bs can be improved, and specifically, the above-mentioned saturation magnetic flux density Bs can be increased to 2.35 T or more.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: October 30, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventors: Mitsuo Kawasaki, Hisayuki Yazawa, Yoshihiro Kanada
  • Patent number: 7285338
    Abstract: An anisotropic thin-film rare-earth permanent magnet endowed with high magnetic characteristics by rendering a vapor-phase-grown thin film anisotropic in the layering direction. The atomic laminate units are formed by laminating a monoatomic layer of a rare earth element on a substrate of a non-magnetic material having, a flat smoothness and then by laminating an atomic laminate of a transition metal element having a plurality of monoatomic layers of a transition metal element, so that the atomic laminate units of a characteristic construction are laminated in a plurality of layers. As a result, each atomic laminate of the transition metal element has an easy magnetizable axis in the laminate direction of the monoatomic layers and which are sandwiched between a monoatomic layer of a rare-earth element so that an inverse magnetic domain is suppressed to establish a strong coercive force.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: October 23, 2007
    Assignee: Neomax Co., Ltd.
    Inventors: Osamu Yamashita, Ken Makita
  • Publication number: 20070231603
    Abstract: A magnetic field generating method and a permanent magnetic circuit for, using magnetic field heat treatment, imparting axisymmetric anisotropy in a direction parallel to the substrate to a soft magnetic body, particularly a soft magnetic backing layer for a perpendicular two-layered magnetic recording medium used in perpendicular magnetic recording. In a rare earth permanent magnetic circuit that exhibits hardly any demagnetization at high temperature, a plurality of magnet side faces 95 orthogonal to pole faces 94 are disposed with space therebetween. A magnetic field that is substantially antiparallel to magnetization 91 is generated in the space, and an unprocessed sample is inserted. Further, the permanent magnetic circuit with the unprocessed sample inserted therein is placed in a heat treatment furnace, and the unprocessed sample is rotated 96 as desired.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 4, 2007
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Ken OHASHI
  • Publication number: 20070218319
    Abstract: A magnetic material composed of ?-InxFe2-xO3 (wherein 0<x?0.30) crystal in which In is substituted for a portion of the Fe sites of the ?-Fe2O3 crystal. The crystal exhibits an X-ray diffraction pattern similar to that of an ?-Fe2O3 crystal structure and has the same space group as that of an ?-Fe2O3. The In content imparts to the magnetic material a magnetic phase transition temperature that is lower than that of the ?-Fe2O3 and a spin reorientation temperature that is higher than that of the ?-Fe2O3. The In content can also give the magnetic material a peak temperature of the imaginary part of the complex dielectric constant that is higher than that of the ?-Fe2O3.
    Type: Application
    Filed: September 15, 2006
    Publication date: September 20, 2007
    Inventors: Shin-ichi Ohkoshi, Kazuhito Hashimoto, Shunsuke Sakurai, Shiro Kuroki
  • Publication number: 20070190360
    Abstract: The present invention provides a composite magnetic sheet having a high magnetic permeability, to be produced easily at a low cost. The composite magnetic sheet includes magnetic substance powders and polytetrafluoroethylene powders.
    Type: Application
    Filed: February 8, 2007
    Publication date: August 16, 2007
    Inventor: SHINICHI SAKAMOTO
  • Patent number: 7233458
    Abstract: A write element includes a first pole pedestal and a second pole pedestal opposing the first pole pedestal and defining a write gap between the first and second pole pedestals. A first layer of CoFeON is film positioned between the first pole pedestal and the write gap. A second layer of CoFeON film is positioned between the second pole pedestal and the write gap.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: June 19, 2007
    Assignee: International Business Machines Corporation
    Inventors: Brian E. Brusca, Joel S. Forrest, Richard Hsiao, James D. Jarratt, Brian R. York
  • Patent number: 7226666
    Abstract: An improved magnetoelectric composite which incorporates LaSrMn or LaCaMn oxides as a magnetostrictive composition are described. The magnetostrictive composition preferably has the formula La0.7Sr0.3MnO3 or La0.7Ca0.3MnO3. The composites preferably have a magnetostrictive layer joined to a piezoelectric layer. The composites are useful for sensors, read-heads, storage media and high frequency transducer devices.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: June 5, 2007
    Assignee: Oakland University
    Inventor: Gopalan Srinivasan
  • Patent number: 7218465
    Abstract: A stamper/imprinter for use in forming a magnetic transition pattern in a magnetic material by means of contact printing, comprising: (a) a non-magnetic substrate having a major surface comprising a patterned plurality of spaced-apart recesses with a plurality of non-recessed areas therebetween, the patterned plurality of recesses corresponding to the magnetic transition pattern to be formed in the magnetic material; and (b) unidirectionally permanently magnetized material filling each of the plurality of recesses and having exposed surfaces substantially coplanar with the plurality of non-recessed areas.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: May 15, 2007
    Assignee: Seagate Technology LLC
    Inventors: Neil Deeman, Shih-Fu Lee
  • Patent number: 7160636
    Abstract: A ferrite film is formed by regularly arranging constituents such as magnetized grains or one analogous to that. In the ferrite film, the constituents have at least one of the uniaxial anisotropy and the multiaxial anisotropy. The ferrite film has the magnetic anisotropy or the magnetic isotropy. The ferrite film is formed by the use of the plating method in the presence of a magnetic field. Furthermore, an electromagnetic noise suppressor includes the ferrite film.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: January 9, 2007
    Assignee: NEC Tokin Corporation
    Inventors: Koichi Kondo, Okikuni Takahata, Tatsuya Chiba, Hiroshi Ono, Shigeyoshi Yoshida, Masanori Abe, Masahiro Yamaguchi
  • Patent number: 7141311
    Abstract: The present invention provides a Y-type hexagonal ferrite thin film suitable for high frequency devices, having a crystal structure with the c-axis oriented perpendicular to the surface of the thin film. The present invention also provides a method of producing the Y-type hexagonal ferrite thin film, comprising the steps of preparing a viscous solution containing a metal-organic complex which is formed using a primary component including a Fe+3 ion, and a secondary component including a Ba2+ ion, at least one transition metal ion selected from the group consisting of Fe2+, Co2+, Ni2+, Zn2+, Cu2+ and Mn2+; and optionally at least one metal ion selected from the group consisting of Sr2+, Ca2+ and Pb2+, forming a film having a Y-type ferrite composition on a surface made of noble metal through a coating process using the viscous solution, and burning the film at a temperature of 750° C. or more.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: November 28, 2006
    Assignee: Japan Science and Technology Agency
    Inventors: Jun Takada, Tatsuo Fujii, Makoto Nakanishi
  • Patent number: 7128986
    Abstract: The present invention includes magnetic write elements with portions formed a nanophase high magnetic moment material to enable further increases in areal density in magnetic recording. The nanophase deposited high magnetic moment material comprises coated nanoclusters and nanolaminated cluster films that are deposited to form nanophase high magnetic moment material portions of a write pole and SUL layer in perpendicular recording media. The nanophase write poles exhibit high magnetic moments and are generally compatible with conventional writer head fabrication techniques.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: October 31, 2006
    Assignee: Seagate Technology, LLC
    Inventors: Robert W. Lamberton, Declan Macken, Paul M. Dodd, William J. O'Kane
  • Patent number: 7094478
    Abstract: A vibration damping laminate includes a magnetic layer and an uncoated constraining layer joined by a viscoelastic layer, wherein the modulus of elasticity of the viscoelastic layer is substantially less than that of either of the other two layers. The laminate is magnetically attached to an associated source of vibrations by the magnetic layer, and substantially all vibrational damping is effected by the viscoelastic layer.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: August 22, 2006
    Assignee: Material Sciences Corporation, Engineered Materials and Solutions Group, Inc.
    Inventors: Kevin W. Griffey, Gregory Pardus, Ahid D. Nashif, Edwin F. Aquino
  • Patent number: 7070869
    Abstract: The invention relates to an element, comprising a substrate with a surface roughness of less than 5 nm, with saturated bonds on the surface and an MPt3 film applied to at least one side of the substrate, with a magnetic anisotropy perpendicular to the plane of the film, with M=a metal of the 5th to 9th sub-group of the periodic table, nickel or gadolinium. The invention further relates to a method for production of the above and the use of said elements as a magnetic component, for example as a magnetic sensor or as a magneto-optical storage element.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: July 4, 2006
    Assignee: Universität Konstanz
    Inventors: Günter Schatz, Manfred Albrecht, Mireille Maret, Andreas Maier, Frank Treubel
  • 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: 6986953
    Abstract: The present invention pertains to a magnetic laminate that may be used in the creation of an advertising, novelty or remembrance item. The laminated construction provides for containment of the coercive rings so as to substantially eliminate the migration of forces between successive sheets in a stack. The sheets may have one or more removable elements that release cleanly from the configuration through the use of a curable, frangible coating that creates a frangible bond and that does not impede the processing or handling of the sheets.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: January 17, 2006
    Assignee: Ward/Kraft, Inc.
    Inventor: Jesse D. Crum