Defined Magnetic Layer Patents (Class 428/692.1)
  • Patent number: 8385184
    Abstract: A device for mass storage of information, the device comprising: a substrate (30); an electrically-conductive tip (10) for atomic force microscopy located above the surface (31) of said substrate (30) in electrical contact therewith; and a voltage generator (41) for applying a potential difference between said tip (10) and said substrate (30); the device being characterized in that: said substrate (30) has a surface (31) of a material presenting electrical conductivity that is both electronic and ionic in nature; and in that said generator (41) is adapted to apply a potential difference that is sufficient to induce a redox reaction of said material that modifies the surface electrical conductivity of the substrate (30). The use of such a device (1) for mass storage of information.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: February 26, 2013
    Assignees: Centre National de la Recherche Scientifique, Universite Paris Sud Xi
    Inventors: Alexandre Moradpour, Olivier Schneegans, Oana Georgiana Dragos, Sylvain Franger, Nita Dragoe, Loreynne Pinsard-Gaudart, Alexandre Revcolevschi
  • Patent number: 8377576
    Abstract: Disclosed herein is a magnetic paste that generally includes a magnetic component and a liquid organic component. The magnetic component includes a plurality of discrete nanoparticles, a plurality of nanoparticle-containing assemblies, or both. Magnetic devices can be formed from the magnetic paste. Methods of making and using the magnetic paste are also described.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: February 19, 2013
    Assignee: Inframat Corporation
    Inventors: T. Danny Xiao, Xinqing Ma, Heng Zhang, Junfeng Zhou
  • Patent number: 8377147
    Abstract: The present invention uses externally applied electromagnetic stimulus to control and heat porous magnetic particles and material associated with the particles. The particles contain magnetic material, such as superparamagnetic iron oxide and are infused with a material. Application of a DC magnetic field allows them to be moved with their infused material, and application of an AC RF electromagnetic field allows them to be heated with their infused material. The material can be infused into pores of the particles and the particles can also adhere to an aqueous droplet. The present invention also provides a multi-layer porous magnetic particle. The particle includes a host layer having pores sized to accept magnetic nanoparticles. Magnetic nanoparticles are infused within pores of the host layer. An encoding layer includes pores that define a spectral code. The pores in the encoding layer are sized to substantially exclude the magnetic nanoparticles.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: February 19, 2013
    Assignee: The Regents of the University of California
    Inventors: Michael J. Sailor, Ji-Ho Park, Austin Derfus, Ester Segal, Kenneth S. Vecchio, Sangeeta N. Bhatia
  • Patent number: 8329319
    Abstract: The invention relates to a phase change magnetic composite material for use in an information recording medium, said material comprising a phase change material component, and a ferromagnetic material component, wherein said material exhibits both magnetic effects and phase change effects, and is usable for optical media, phase change random access memory (PCRAM) devices, magnetic random access memory (MRAM) devices, solid state memory devices, sensor devices, logical devices, cognitive devices, artificial neuron network, three level device, control device, SOC (system on chip) device, and semiconductors.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: December 11, 2012
    Assignee: Agency for Science, Technology and Research
    Inventors: Luping Shi, Wendong Song, Xiangshui Miao, Tow Chong Chong
  • Patent number: 8288458
    Abstract: An aggregate of functional particles includes a plurality of functional particles and an insulating material for covering the plurality of functional particles, and a large number of aggregates of functional particles are filled in a resin. Alternatively, insulating functional particles are added to the plurality of functional particles by an amount less than 50% of that of the functional particles in volume ratio.
    Type: Grant
    Filed: March 28, 2005
    Date of Patent: October 16, 2012
    Assignee: Nippon Kagaku Yakin Co., Ltd.
    Inventors: Kiyotaka Matsukawa, Kozo Ishihara, Kazuhiro Masano, Toshikazu Tanaka
  • Publication number: 20120249375
    Abstract: A material contains a curable liquid polymer containing suspended nanoparticles capable of exhibiting a magnetic property. The nanoparticles are present in a concentration sufficient to cause the curable liquid polymer to flow in response to application of a magnetic field, enabling the material to be guided into narrow regions to completely fill such regions prior to the polymer being cured. A method includes applying a filler material to at least one component, the filler material including a heat curable polymer containing nanoparticles, and applying an electromagnetic field to at least part of the filler material. The nanoparticles contain a core capable of experiencing localized heating sufficient to at least partially cure surrounding polymer. Also disclosed is an assembly for use at radio frequencies. The assembly includes a substrate and at least one component supported by the substrate.
    Type: Application
    Filed: May 23, 2008
    Publication date: October 4, 2012
    Inventors: Markku T. Heino, Reijo K. Lehtiniemi, Markku A. Oksanen, Eira T. Seppala, Pekka Martti Tapio Ikonen, Robin H.A. Ras, Jaakko Timonen, Maija Pohjakallio, Christoffer Johans
  • Patent number: 8277960
    Abstract: The invention relates to inorganic, intermetallic, inhomogeneous compounds having a magnetic resistance effect and an intrinsic field sensitivity of at least 7% at 1 T at room temperature. The invention further relates to a method for the production and use thereof, particularly as magnetic field sensors or in spin electronics.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: October 2, 2012
    Assignee: Johannes Gutenberg-Universität Mainz
    Inventors: Frederick Casper, Claudia Felser
  • Patent number: 8273441
    Abstract: A garage door display and decorative article include a first closed cell foam layer having a thickness of at least 0.1 inches having a front face and a rear face. A rare earth metal magnet is fused to previously melted and presently solidified portions of the first closed cell foam layer on the rear face. A decorative piece is fused to previously melted and presently solidified portions of the first closed cell foam layer on the front face.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: September 25, 2012
    Inventor: Suzanne M. Deaton
  • Patent number: 8268436
    Abstract: The present invention is directed to a pneumatic tire comprising one or more indicia formed from an elastomeric coating composition comprising a diene based elastomer and from 1 to 100 parts by weight, per 100 parts by weight of elastomer, of a nanoparticle comprising an inner core of an inorganic magnetic material at least partially covered by an outer layer of silica.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: September 18, 2012
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Rene Jean Zimmer, Claude Ernest Felix Boes, Georges Koster, Hans-Bernd Fuchs, Klaus Unseld, Wolfgang Albert Lauer
  • Patent number: 8240609
    Abstract: A metamaterial has a magnetic permeability response at frequencies sufficient to generate a repulsive force between a fluid and a surface to which the metamaterial may be applied. The metamaterial may be nanofabricated such that an absolute value of the magnetic permeability of the metamaterial is substantially greater than an absolute value of an electric permittivity of the metamaterial. The metamaterial may generate a repulsive force between the surface and the fluid moving relative to the surface and thereby reduce viscous drag of the fluid on the surface. A method of reducing the viscous drag of the fluid moving past the surface includes producing relative motion between the surface and the fluid and generating the repulsive force between the surface and the fluid.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: August 14, 2012
    Assignee: The Boeing Company
    Inventors: Claudio G. Parazzoli, Minas H. Tanielian, Robert B. Greegor
  • Patent number: 8163106
    Abstract: An R—Fe—B sinlered magnet having on the surface thereof a vapor deposited film of aluminum or an alloy thereof and a method for producing the same. The vapor deposited film of aluminum or an alloy thereof comprises a columnar crystalline structure grown broader from the surface of the R—Fe—B sintered magnet body outward to the outer surface, which has a part within a region defined in the thickness direction of the film as taken from the surface of the R—Fe—B sintered magnet to ? of the film thickness, 5 to 30 intercrystalline gaps of 0.01 ?m to 1 ?m in width as counted per 10 ?m length in the lateral direction of the film. The method comprises controlling the average film formation rate such that it is slower up to a predetermined point and then is speeded up later thereon.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: April 24, 2012
    Assignee: Hitachi Metals, Ltd.
    Inventors: Atsushi Kikugawa, Koshi Yoshimura, Yoshimi Tochishita, Masanao Kamachi, Nobuhiro Misumi
  • Patent number: 8158239
    Abstract: An identification medium provided with a laminated structure comprises laminated layers of a magnetically controllable layer, in which magnetic microcapsules are dispersed, and a color shifting layer.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: April 17, 2012
    Assignee: NHK Spring Co., Ltd.
    Inventors: Itsuo Takeuchi, Hidekazu Hoshino, Shinya Nasubida
  • Patent number: 8119260
    Abstract: In a ferromagnetic material containing at least one kind of rare-earth element, a layer containing at least one kind of alkaline earth element or rare-earth element and fluorine is formed at the grain boundary or near the powder surface of the ferromagnetic material. A further layer containing at least one kind of rare-earth element, having a fluorine concentration lower than that of the layer described first and having a rare-earth element concentration higher than that of the host phase of the ferromagnetic material, or an oxide layer containing a rare-earth element is formed in adjacent with a portion of the layer described first.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: February 21, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Matahiro Komuro, Yuichi Satsu, Kunihiro Maeda, Yuzo Kozono
  • Patent number: 8097173
    Abstract: The invention provides porous particles that produce a predetermined optical response and that may be manipulated magnetically. A preferred particle of the invention has a porous structure that produces a predetermined optical response and magnetic material adhered to the particle. Another preferred particle is amphiphilic. The optical response provided by a particle of the invention enables particles of the invention to be used in sensing, labeling, signaling, display and many other applications. The magnetic nature of the present magnetic particles permits the particles themselves to be manipulated, e.g., vibrated, moved and re-oriented. The porous particles can also be used to control, move, and/or deliver small volumes of liquids and solids associated with the particles.
    Type: Grant
    Filed: July 18, 2005
    Date of Patent: January 17, 2012
    Assignee: The Regents of the University of California
    Inventors: Michael J. Sailor, Yang Yang Li, Nathan Trujillo, Jason Dorvee
  • Patent number: 8076010
    Abstract: A magnetic wire includes a magnetic metal wire material having a surface coated with a layer of an insulating material. The magnetic wire has a magnetic coercive force of 30 A/m or less and has a Barkhausen effect.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: December 13, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Mario Fuse, Shoji Yamaguchi, Tsukasa Matsuda, Eizo Kurihara, Yasunori Koda, Kunihiro Takahashi
  • Patent number: 8076012
    Abstract: Disclosed are a magnetic thin film capable of providing a high uniaxial magnetic anisotropy, Ku, while suppressing the saturation magnetization Ms thereof, and a method for forming the film; and also disclosed are various devices to which the magnetic thin film is applied. The magnetic thin film comprises a Co-M-Pt alloy having an L11-type ordered structure (wherein M represents one or more metal elements except Co and Pt). For example, the Co-M-Pt alloy is a Co—Ni—Pt alloy of which the composition comprises from 10 to 35 at. % of Co, from 20 to 55 at. % of Ni and a balance of Pt. The magnetic thin film is applicable to perpendicular magnetic recording media, tunnel magneto-resistance (TMR) devices, magnetoresistive random access memories (MRAM), microelectromechanical system (MEMS) devices, etc.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: December 13, 2011
    Assignees: Tohoku University, Fuji Electric Co., Ltd.
    Inventors: Takehito Shimatsu, Hideo Sato, Osamu Kitakami, Satoshi Okamoto, Hajime Aoi, Hiroyasu Kataoka
  • Patent number: 8071887
    Abstract: A printed circuit board includes a substrate having a surface, a circuit layer having a plurality of electrical traces formed on the surface, and an electrically conductive metal layer formed on the circuit layer. The circuit layer is comprised of a composite of carbon nano-tubes and metallic nano-particles.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: December 6, 2011
    Assignees: FuKui Precision Component (Shenzhen) Co., Ltd., Zhen Ding Technology Co., Ltd.
    Inventors: Shing-Tza Liou, Yao-Wen Bai, Cheng-Hsien Lin
  • Patent number: 8043727
    Abstract: An electromagnetic wave-absorption multilayer substrate has an electromagnetic wave-absorption sheet which includes a soft magnetic alloy powder and a binding agent and two insulating substrates which have facing surfaces facing the electromagnetic wave-absorption sheet and which are pressure-bonded thereto. In addition, one of the insulating substrates has a plurality of holes formed in the facing surface.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: October 25, 2011
    Assignee: Alps Electric Co., Ltd.
    Inventors: Isao Ishigaki, Hideo Komura
  • Patent number: 8029922
    Abstract: Methods and associated structures of forming microelectronic devices are described. Those methods may include forming a magnetic material on a substrate, wherein the magnetic material comprises rhenium, cobalt, iron and phosphorus, and annealing the magnetic material at a temperature below about 330 degrees Celsius, wherein the coercivity of the annealed magnetic material is below about 1 Oersted.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: October 4, 2011
    Assignee: Intel Corporation
    Inventors: Paul McCloskey, Donald S. Gardner, Brice Jamieson, Saibal Roy, Terence O'Donnell
  • Patent number: 8021771
    Abstract: A thin film structure including a plurality of grains of a first magnetic material having a first Curie temperature embedded in a matrix of a second material having a second Curie temperature, wherein the second Curie temperature is lower than the first Curie temperature and the second material comprises one or more of an oxide, a sulfide, a nitride, and a boride.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: September 20, 2011
    Assignee: Seagate Technology LLC
    Inventors: Dieter Klaus Weller, Edward Charles Gage, Ganping Ju, Bin Lu
  • Patent number: 8017255
    Abstract: An electromagnetic noise suppressor of the present invention has magnetic resonance frequency of 8 GHz or higher, and the imaginary part of complex magnetic permeability at 8 GHz is higher than the imaginary part of complex magnetic permeability at 5 GHz. Such an electromagnetic noise suppressor is capable of achieving sufficient electromagnetic noise suppressing effect over the entire sub-microwave band. The electromagnetic noise suppressor can be manufactured by forming a composite layer on the surface of a binding agent through physical deposition of a magnetic material on the binding agent. The structure with an electromagnetic noise suppressing function of the present invention is a printed wiring board, a semiconductor integrated circuit or the like that is covered with the electromagnetic noise suppressor on at least a part of the surface of the structure.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: September 13, 2011
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Toshiyuki Kawaguchi, Atsushi Taniguchi, Takashi Gonda
  • Patent number: 7993762
    Abstract: The present invention relates to a magnetic thin film containing a L11 type Co—Pt—C alloy in which atoms are orderly arranged, and can realize an order degree excellent in regard to the L11 type Co—Pt—C alloy to achieve excellent magnetic anisotropy of the magnetic thin film. Therefore, in the various application devices using the magnetic thin film, it is possible to achieve a large capacity process and/or a high density process thereof in a high level.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: August 9, 2011
    Assignees: Tohoku University, Fuji Electric Device Technology Co., Ltd.
    Inventors: Takehito Shimatsu, Hideo Sato, Osamu Kitakami, Satoshi Okamoto, Hajime Aoi, Hiroyasu Kataoka
  • Patent number: 7981528
    Abstract: A water-repelling layer is formed on a resin film, and a stripe pattern region is formed so as to be positioned within a surface region of the water-repelling layer and so as to be relatively hydrophilic with respect to water repellency of the water-repelling layer. A magnetic stripe pattern is formed of needle-shaped magnetic grains oriented and aggregated in the stripe pattern region. The needle-shaped magnetic grains are arranged in a desirable state in a predetermined stripe pattern, with a high magnetic permeability and a magnetic sheet with stripe-arranged magnetic grains that is thin and flexible is obtained.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: July 19, 2011
    Assignee: Panasonic Corporation
    Inventors: Seiichi Nakatani, Yoshihisa Yamashita, Takashi Ichiryu, Koichi Hirano
  • Patent number: 7978078
    Abstract: A magnetic core transceiver antenna for EAS marker detection is provided. The core includes a stack of amorphous alloy ribbons insulated from each other and laminated together. A coil winding of wire, also insulted from the ribbons, and connected to an electronic controller provides the transmitter and receiver modes. The transceiver antenna is optimized for the dual mode operation, and is smaller and uses less power than conventional air-core EAS antennas with equivalent performance. Complex core geometries, such as a sandwiched stack of different sized ribbons, can be implemented to vary the effective permeability of the core to customize antenna performance. Multiple transceiver antennas can be combined to increase the size of the generated EAS interrogation zone.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 12, 2011
    Assignee: Sensormatic Electronics, LLC
    Inventors: Richard L. Copeland, Brent F. Balch, Steven W. Embling, William M. Farrell, Stewart E. Hall
  • Patent number: 7976961
    Abstract: A laminate of a magnetic substrate comprising a high molecular compound layer and a magnetic metal thin plate wherein the volume resistivity defined in JIS H 0505 in a direction perpendicular to the high molecular compound layer surface of the laminate is less than 108 ?cm. The laminate is provided with an electrical continuity point created among magnetic metal thin plates such that the high molecular compound inside the laminate is pushed out to the outside of the laminate by pressurizing the laminate. The laminate can exhibit high thermal conductivity in order to prevent deterioration of heat releasing properties caused by low thermal conductivity when exothermic heat due to the core loss of the laminate of the magnetic substrate is released to the outside.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: July 12, 2011
    Assignee: Nakagawa Special Steel Co., Ltd.
    Inventors: Mitsunobu Yoshida, Nobuhiro Maruko, Hiroshi Watanabe
  • Patent number: 7943240
    Abstract: In order to obtain actuator elements capable of being displaced such as expansion and contract or bending for practical use even when used as actuator elements with larger size, stacked layers or bundles in which conductive polymer-containing layers or fiber-like tubes are provided with conductive polymer composite structures which include conductive substrates and conductive polymers, said conductive substrates have deformation property, and conductivity of said conductive substrates is not less than 1.0×103 S/cm are used.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: May 17, 2011
    Assignee: Eamax Corporation
    Inventors: Tetsuji Zama, Susumu Hara, Shingo Sewa
  • Patent number: 7913906
    Abstract: A reader/writer comprises a circuit board, a communication control portion mounted on the circuit board and configured to perform communication with IC tags, sealing resin for sealing the communication control portion; and an antenna electrically connected to the communication control portion, in which a resin layer is disposed on the sealing resin, the resin layer having a higher adhesiveness to a conductive film used as the antenna than that of the sealing resin, and the antenna is disposed on the resin layer.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: March 29, 2011
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Tomoki Kobayashi, Toshiji Shimada, Hiroyuki Kato, Hiroshi Shimizu
  • Patent number: 7914912
    Abstract: Described herein is a microstructure having a substrate and a plurality of nano-fibers attached to the substrate. Each nano-fiber moves between the first and second states without an external mechanical load being applied to the nano-fibers. Each nano-fiber is configured to move between a first state and a second state in response to applied electricity, magnetism, chemical solution, heat, or light. Each nano-fiber is straight in the first state and curved in the second state, and when the nano-fibers are in the second state and in contact with a contact surface, the nano-fibers adhere to the contact surface.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: March 29, 2011
    Assignee: The Regents of the University of California
    Inventors: Ronald S. Fearing, Abraham Bachrach, Richard Groff, Carmel Majidi
  • Patent number: 7898249
    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: July 16, 2008
    Date of Patent: March 1, 2011
    Assignee: International Business Machines Corporation
    Inventors: Johannes Paul, Rolf Schaefer
  • Patent number: 7855861
    Abstract: A hard disk drive slider comprises an overcoat layer, which covers an air-bearing surface of the slider. The overcoat covers an exposed surface of a tunneling magnetoresistance transducer. An adhesion layer is coupled with the overcoat layer and the air-bearing surface. The adhesion layer comprises a compound of nitrogen. The compound of nitrogen reduces noise in read data from the tunneling magnetoresistance transducer.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: December 21, 2010
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Peter M. Dang, Eric W. Flint, Daryl J. Pocker, Yongjian Sun, Jila Tabib, Brian R. York
  • Patent number: 7820307
    Abstract: A recording paper having a magnetic material-containing layer, that includes a magnetic material that generates a large Barkhausen effect and a filler, and is disposed between pulp layers containing a pulp.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 26, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eizo Kurihara, Tsukasa Matsuda, Mario Fuse, Shoji Yamaguchi, Kunihiro Takahashi
  • Publication number: 20100255292
    Abstract: A problem of the present invention is to prevent a magnetic property from degrading and suppress eddy currents efficiently. A motor permanent-magnet (1) according to the present invention includes a coating film (12) near a surface where an eddy current tends to flow in a great magnitude. The eddy current is cut off by an electrical nonconductive a matrix (13) intervening between magnetic phases (14) as well as small dispersed eddy currents flow in respective magnetic phases (14). In this motor permanent-magnet (1), the coating film (12) suppresses the eddy currents, which originally become great in magnitude near the surface, to make the eddy current small.
    Type: Application
    Filed: November 4, 2008
    Publication date: October 7, 2010
    Inventors: Yasutaka Shintani, Toshiyasu Komatsu
  • Patent number: 7794859
    Abstract: A rare-earth magnet having a protective film for enhancing a corrosion resistance is provided. The protective film is a three-layer film including a first protective layer with a crystalline structure ? (for example, a polycrystalline structure), a second protective layer with a crystalline structure ? (for example, a columnar-crystalline structure), and a third protective layer with the crystalline structure ? from the side near a magnet body. Since the adjoining first and second protective layers have different crystalline structures from each other, and the adjoining second and third protective layers have also different crystalline structures from each other, compactness among the three layers in the protective film may be improved. Therefore, development of a pinhole is restrained, and corrosion of the protective film can be restrained.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: September 14, 2010
    Assignee: TDK Corporation
    Inventors: Takeshi Sakamoto, Nobuya Uchida, Yoshitomo Tanaka, Yasuyuki Nakayama
  • Patent number: 7790300
    Abstract: An R—Fe—B based thin film magnet including an R—Fe—B based alloy which contains 28 to 45 percent by mass of R element (where R represents at least one type of rare-earth lanthanide elements) and which is physically formed into a film, wherein the R—Fe—B based alloy has a composite texture composed of R2Fe14B crystals having a crystal grain diameter of 0.5 to 30 ?m and R-element-rich grain boundary phases present at boundaries between the crystals. The magnetization characteristics of the thin film magnet are improved. The R—Fe—B based thin film magnet can be prepared by heating to 700° C. to 1,200° C. during physical film formation or/and the following heat treatment, so as to grow crystal grains and form R-element-rich grain boundary phases.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: September 7, 2010
    Assignees: Japan Science and Technology Agency, Hitachi Metals, Ltd., Namiki Precision Jewel Co., Ltd.
    Inventors: Shunji Suzuki, Kenichi Machida, Eiji Sakaguchi, Kazuya Nakamura
  • Patent number: 7781508
    Abstract: A rubber composition, which comprises 100 parts by weight of an ethylene-alkyl acrylate copolymer rubber, 5-40 parts by weight of EPDM, 1-40 parts by weight of an ?-olefin oligomer, 0.5-4 parts by weight of an organic peroxide cross-linking agent, 0.5-4 parts by weight of an amine-based vulcanizing agent, and 300-1,000 parts by weight of magnetic powder. The rubber composition is a rubber composition filled a magnetic powder at a high packing density, where an ethylene-alkyl acrylate copolymer rubber having amine vulcanizable groups as a binder, and effectively usable in rubber-bonded sensor magnets, etc., without any foaming at the time of vulcanization molding and with distinguished processabilities such as mold releasability, etc.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: August 24, 2010
    Assignee: NOK Corporation
    Inventors: Eiji Komiya, Shiro Hirose
  • Patent number: 7718279
    Abstract: An epitaxial Ni3FeN film with unique magnetic properties such as single magnetic domain (even in a large scale 0.5?×0.5?), which rotates coherently in response to the desired switching field with a very sharp transition is described. The magnetic hysteresis loop of this new magnetic nitride is close to the perfect ideal square with the same value of saturation magnetization, remnant magnetization, and magnetization right before switching (domain reversal). The switching field is tunable which make this material more attractive for magneto-resistive devices such as MRAM's, read heads and magnetic sensors.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: May 18, 2010
    Assignee: Board of Trustees of Michigan State University
    Inventor: Reza Loloee
  • Patent number: 7700193
    Abstract: A core-shell structure with magnetic, thermal, and optical characteristics. The optical absorption band is tailorable by choice of the mixing ratio of the core/shell component to give the desired shell thickness. The core-shell structure is particularly suitable for biomedical applications such as MRI (magnetic resonance imaging) developer, specific tissue identification developer, and magnetic thermal therapy.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: April 20, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Ming-Yao Chen, Wen-Hsiang Chang, Chin-I Lin, Shian-Jy Jassy Wang, Yuh-Jiuan Lin
  • Publication number: 20100068512
    Abstract: Disclosed is a magnetic material for a high frequency wave which has high magnetic permeability and small eddy-current loss, particularly a magnetic material for a high frequency wave which can be used suitably in an information device which works in a high frequency field of 1 GHz or higher. Specifically disclosed is a composite magnetic material for a high frequency wave, which comprises a (rare earth element)-(iron)-(nitrogen)-based magnetic material and a (rare earth element)-(iron)-(nitrogen)-based magnetic material whose surface is coated with a ferrite magnetic material.
    Type: Application
    Filed: April 25, 2008
    Publication date: March 18, 2010
    Inventors: Nobuyoshi Imaoka, Masanori Abe, Takashi Nakagawa, Sasaru Tada
  • Patent number: 7655324
    Abstract: An electro-magnetic storage device and method are disclosed. In one embodiment, a memory device includes a first magnetic material to attract a movable structure (e.g., a ferromagnetic material) when a first voltage is applied between the first magnetic material and the movable structure, and a second magnetic material to release the movable structure when a second voltage is applied between the second magnetic material and the movable structure. The movable arm may create a closed circuit when the second voltage is applied between the second magnetic material and the movable structure. There may be a vacuum-gap between the movable structure and at least one of the first magnetic material and/or the second magnetic material. The memory device may be stackable on other memory devices having similar properties, and/or electrically coupled with other memory devices having similar properties in a memory array.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: February 2, 2010
    Inventor: Sridhar Kasichainula
  • Patent number: 7625640
    Abstract: An electromagnetic noise suppressor of the present invention has magnetic resonance frequency of 8 GHz or higher, and the imaginary part ??H of complex magnetic permeability at 8 GHz is higher than the imaginary part ??L of complex magnetic permeability at 5 GHz. Such an electromagnetic noise suppressor is capable of achieving sufficient electromagnetic noise suppressing effect over the entire sub-microwave band. The electromagnetic noise suppressor can be manufactured by forming a composite layer 3 on the surface of a binding agent 2 through physical deposition of a magnetic material on the binding agent 2. The structure with an electromagnetic noise suppressing function of the present invention is a printed wiring board, a semiconductor integrated circuit or the like that is covered with the electromagnetic noise suppressor on at least a part of the surface of the structure.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: December 1, 2009
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Toshiyuki Kawaguchi, Atsushi Taniguchi, Takashi Gonda
  • Patent number: 7622202
    Abstract: A soft magnetic material includes a plurality of composite magnetic particles (40) each including a metal magnetic particle (10) and an insulation coating (20) covering the surface of the metal magnetic particle (10), wherein the insulation coating (20) contains Si (silicon), and 80% or more of Si contained in the insulation coating constitutes a silsesquioxane skeleton. Therefore, it is possible to effectively decrease a hysteresis loss while suppressing an increase in eddy-current loss.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: November 24, 2009
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Toru Maeda, Kazuyuki Maeda, Yasushi Mochida, Koji Mimura
  • Patent number: 7608346
    Abstract: A magnetic field sensor, in particular an rpm sensor and/or rotational direction sensor and/or position sensor for the drive train of a motor vehicle, has a sensor array, with a sensor element that responds to a magnetic field, and optionally with a permanent magnet, the latter being sheathed with plastic jointly with the sensor array and parts of terminal conductor tracks, and the conductor tracks are embodied in one piece with a fixing element for the permanent magnet and the sensor array as a stamped grid, wherein stamped grid is shaped as a three-dimensional structure which carries the sensor array and optionally embraces the permanent magnet in the manner of a mount, and the mount and the terminal conductor tracks are first stamped out from a metal sheet as a gridlike developed form, and then deformed to form the mount.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: October 27, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Alexander Braun, Andreas Herzberger, Steffen Waldenmeier
  • Patent number: 7604875
    Abstract: Materials suitable for medical and dental implants with magnetic susceptibility matched to surrounding environment to reduce artifacts in nuclear magnetic resonance imaging. Paramagnetic and diamagnetic materials may be added to ceramics and polymer resins to adjust magnetic susceptibility. Other embodiments are described and claimed.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: October 20, 2009
    Assignee: California Institute of Technology
    Inventor: Shawn Wagner
  • Publication number: 20090256823
    Abstract: A display device is provided with an optical waveguide, a transparent fixed electrode disposed in surface contact with the optical waveguide, and a transparent movable electrode disposed facing the transparent fixed electrode on a side opposite to the optical waveguide. When a driving voltage is applied, the transparent movable electrode is movable by an external force, between a first stable state in which it is kept apart from the transparent fixed electrode by elasticity, and a second stable state in which it makes insulated contact with the transparent fixed electrode by electrostatic force. There is no concern about contaminating the air or dirtying hands, and it is possible to write easily using a finger or a simple writing tool, and repeatedly erase.
    Type: Application
    Filed: November 28, 2006
    Publication date: October 15, 2009
    Applicant: TOKYO, THE UNIVERSITY OF
    Inventors: Hiroyuki Fujita, Hiroshi Toshiyoshi, Akio Higo, Roi Shigematsu
  • Patent number: 7588840
    Abstract: A magnetic thin film with a high resonant frequency and superior high-frequency characteristics, and a magnetic device and an inductor with superior high-frequency characteristics are provided. A planar coil and a magnetic thin film are disposed on a substrate, and an inductor is formed between connection terminals. An obliquely-grown magnetic layer in the magnetic thin film is crystal-grown in an oblique direction with respect to a surface of the substrate (an obliquely-grown magnetic body). In order to make the obliquely-grown magnetic body exhibit soft magnetism in the obliquely-grown magnetic layer, an insulator is mixed into the obliquely-grown magnetic body. The obliquely-grown magnetic layer shows in-plane magnetocrystalline anisotropy, and the in-plane magnetocrystalline anisotropy is increased, and an anisotropic magnetic field is increased.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: September 15, 2009
    Assignee: TDK Corporation
    Inventor: Kyung-Ku Choi
  • Patent number: 7579095
    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: Grant
    Filed: April 26, 2007
    Date of Patent: August 25, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Ichihara, Toru Den
  • Patent number: 7566506
    Abstract: A magnetic body includes a plurality of laminated inner layers and an insulating enclosure fully enclosing the inner layers therein. The inner layers include a first or central metal layer, each one of upper and lower sides of which is sequentially provided with a first insulating layer, a second metal layer, a filter layer, a second insulating layer, a third metal layer, and a light-absorbing material layer. Each of the metal layers is negatively charged and formed by coating a specific high-temperature vaporized metal element on an entire surface of an insulating body. The filter layer is woven from an insulating material and has at least 144 millions of meshes per square inch. The light-absorbing material layer stores pre-absorbed light energy. The magnetic body with the above-described structure produces a radial magnetic field of force that provides enhanced magnetizing effect.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: July 28, 2009
    Inventor: Jen-Chieh Wang
  • Patent number: 7553561
    Abstract: A rare earth magnet having excellent corrosion resistance is provided. It has a magnet body (10) containing a rare earth element, and a protective film (20) formed on the magnet body (10). In the protective film (20), a first protective film (21), a second protective film (22) and a third protective film (23) are laminated in this order from the side of the magnet body (10). These are in a polycrystalline state and composed of a metal plated film, for example. The first protective film (21) and the third protective film (23) have a smaller mean crystal grain size than that of the second protective film (22). Microcrystallization of the first protective film (21) can improve the density of the interface between the protective film (20) and the magnet body (10), and decrease the number of pinholes.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: June 30, 2009
    Assignee: TDK Corporation
    Inventors: Takeshi Sakamoto, Nobuya Uchida, Yoshitomo Tanaka, Yasuyuki Nakayama
  • Patent number: 7553562
    Abstract: Present inventions relate to a composite-type magnetic core and a method of manufacturing same. The composite-type magnetic core is made of a soft magnetic metal powder and an insulating binder having a lower electrical conductivity than the soft magnetic metal powder. The composite-type magnetic core has 10 parts per million (ppm) or more but 500 ppm or less of sodium oxide and 50 ppm or more but 3000 ppm or less of boron oxide. The sodium oxide and the boron oxide are concentrated in an inner layer near the surface of the magnetic core.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: June 30, 2009
    Assignee: Sumida Corporation
    Inventor: Tsutomu Otsuka
  • Patent number: 7498088
    Abstract: There are provided a magnetic thin film utilizing a granular film and having excellent high frequency characteristics and a method of manufacturing the same, and a multilayered magnetic film and magnetic components and electronic equipment utilizing the same. A nonreactive sputtering is performed so that there is no oxidation of a magnetic metal, and a saturation magnetization is increased to increase a resonant frequency of permeability. Also, a multi-target simultaneous sputtering is combined with the nonreactive sputtering so that in a granular structure including magnetic grains and an insulating layer a size of the magnetic grains and a thickness of the insulating layer are optimized thereby ensuring a proper magnitude for a crystalline magnetic anisotropy within the grains and excellent soft magnetic properties.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: March 3, 2009
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Kazuyoshi Kobayashi, Kenji Ikeda, Masayuki Fujimoto