Defined Magnetic Layer Patents (Class 428/692.1)
-
Publication number: 20090017279Abstract: 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: ApplicationFiled: June 20, 2008Publication date: January 15, 2009Inventors: Takao Mizushima, Seiichi Abiko, Kyoichi Kawase, Toshio Takahashi, Satoshi Maruyama
-
Patent number: 7474094Abstract: 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: GrantFiled: August 30, 2005Date of Patent: January 6, 2009Assignee: International Business Machines CorporationInventors: Johannes Paul, Rolf Schaefer
-
Publication number: 20090004451Abstract: 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: ApplicationFiled: July 28, 2005Publication date: January 1, 2009Inventors: John Michael Coey, Munuswamy Venkatesan, Ciara Bridget Fitzgerald
-
Patent number: 7445852Abstract: 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: GrantFiled: July 6, 2004Date of Patent: November 4, 2008Assignee: Mitsui Chemicals, Inc.Inventors: Nobuhiro Maruko, Mitsunobu Yoshida, Hiroshi Watanabe, Takashi Ono, Hidenobu Nogi, Tomoyuki Nakata
-
Patent number: 7435485Abstract: 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: GrantFiled: June 27, 2005Date of Patent: October 14, 2008Assignee: Sony CorporationInventors: Wei Beng Ng, Akio Takada
-
Patent number: 7404915Abstract: 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: GrantFiled: December 11, 2006Date of Patent: July 29, 2008Assignee: Konica Minolta Medical & Graphic, Inc.Inventors: Narito Goto, Takeshi Habu
-
Patent number: 7390580Abstract: 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: GrantFiled: August 19, 2005Date of Patent: June 24, 2008Assignee: Rubber Fab Gasket & Molding, Inc.Inventor: Robert Dupont
-
Publication number: 20080129462Abstract: 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: ApplicationFiled: December 12, 2007Publication date: June 5, 2008Applicant: NOVA CHEMICALS INC.Inventors: Eric Vignola, Richard J. Burns
-
Patent number: 7374826Abstract: 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: GrantFiled: July 28, 2005Date of Patent: May 20, 2008Assignee: The United States of America as represented by the Sceretary of the ArmyInventor: Herbert A. Leupold
-
Patent number: 7371471Abstract: 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: GrantFiled: March 8, 2005Date of Patent: May 13, 2008Assignee: NEC TOKIN CorporationInventors: Shigeyoshi Yoshida, Hiroshi Ono, Yutaka Shimada, Tetsuo Itoh
-
Patent number: 7369336Abstract: 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: GrantFiled: July 21, 2004Date of Patent: May 6, 2008Assignee: FUJIFILM CorporationInventors: Hideyuki Kubota, Akito Kamatani, Masakazu Nishikawa
-
Publication number: 20080090079Abstract: 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: ApplicationFiled: September 28, 2006Publication date: April 17, 2008Inventors: Arnel M. Fajardo, Chang-Min Park
-
Publication number: 20080075974Abstract: 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: ApplicationFiled: September 26, 2006Publication date: March 27, 2008Inventors: Arnel M. Fajardo, Ebrahim Andideh, Changmin Park, Patrick Morrow
-
Publication number: 20070269682Abstract: 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: ApplicationFiled: May 16, 2007Publication date: November 22, 2007Inventors: Rina Lupu Matas, Uri Sharfberg, Gal Wollach, Yoash Carmi
-
Publication number: 20070269681Abstract: 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: ApplicationFiled: May 9, 2007Publication date: November 22, 2007Inventors: Fumihiko AIGA, Seiichi Suenaga, Maki Yonetsu
-
Publication number: 20070259210Abstract: 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: ApplicationFiled: April 26, 2007Publication date: November 8, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Shigeru Ichihara, Toru Den
-
Patent number: 7288333Abstract: 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: GrantFiled: September 10, 2003Date of Patent: October 30, 2007Assignee: Alps Electric Co., Ltd.Inventors: Mitsuo Kawasaki, Hisayuki Yazawa, Yoshihiro Kanada
-
Patent number: 7285338Abstract: 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: GrantFiled: July 30, 2001Date of Patent: October 23, 2007Assignee: Neomax Co., Ltd.Inventors: Osamu Yamashita, Ken Makita
-
Publication number: 20070231603Abstract: 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: ApplicationFiled: March 30, 2007Publication date: October 4, 2007Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventor: Ken OHASHI
-
Publication number: 20070218319Abstract: 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: ApplicationFiled: September 15, 2006Publication date: September 20, 2007Inventors: Shin-ichi Ohkoshi, Kazuhito Hashimoto, Shunsuke Sakurai, Shiro Kuroki
-
Publication number: 20070190360Abstract: 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: ApplicationFiled: February 8, 2007Publication date: August 16, 2007Inventor: SHINICHI SAKAMOTO
-
Patent number: 7233458Abstract: 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: GrantFiled: September 11, 2002Date of Patent: June 19, 2007Assignee: International Business Machines CorporationInventors: Brian E. Brusca, Joel S. Forrest, Richard Hsiao, James D. Jarratt, Brian R. York
-
Patent number: 7226666Abstract: 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: GrantFiled: January 30, 2003Date of Patent: June 5, 2007Assignee: Oakland UniversityInventor: Gopalan Srinivasan
-
Patent number: 7218465Abstract: 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: GrantFiled: June 4, 2003Date of Patent: May 15, 2007Assignee: Seagate Technology LLCInventors: Neil Deeman, Shih-Fu Lee
-
Patent number: 7160636Abstract: 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: GrantFiled: September 11, 2003Date of Patent: January 9, 2007Assignee: NEC Tokin CorporationInventors: Koichi Kondo, Okikuni Takahata, Tatsuya Chiba, Hiroshi Ono, Shigeyoshi Yoshida, Masanori Abe, Masahiro Yamaguchi
-
Patent number: 7141311Abstract: 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: GrantFiled: November 21, 2001Date of Patent: November 28, 2006Assignee: Japan Science and Technology AgencyInventors: Jun Takada, Tatsuo Fujii, Makoto Nakanishi
-
Patent number: 7128986Abstract: 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: GrantFiled: October 16, 2003Date of Patent: October 31, 2006Assignee: Seagate Technology, LLCInventors: Robert W. Lamberton, Declan Macken, Paul M. Dodd, William J. O'Kane
-
Patent number: 7094478Abstract: 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: GrantFiled: September 13, 2002Date of Patent: August 22, 2006Assignee: Material Sciences Corporation, Engineered Materials and Solutions Group, Inc.Inventors: Kevin W. Griffey, Gregory Pardus, Ahid D. Nashif, Edwin F. Aquino
-
Patent number: 7070869Abstract: 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: GrantFiled: August 9, 2001Date of Patent: July 4, 2006Assignee: Universität KonstanzInventors: Günter Schatz, Manfred Albrecht, Mireille Maret, Andreas Maier, Frank Treubel
-
Patent number: 7056599Abstract: 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: GrantFiled: July 8, 2003Date of Patent: June 6, 2006Assignees: JFE Steel Corporation, Sony CorporationInventors: Reiko Sugihara, Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Satoshi Kodama, Kenji Tahara, Yasuyuki Takada, Ken-ichi Mitsuzuka
-
Patent number: 6986953Abstract: 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: GrantFiled: January 28, 2004Date of Patent: January 17, 2006Assignee: Ward/Kraft, Inc.Inventor: Jesse D. Crum