Group Viii Or Ib Metal-base Component Patents (Class 428/668)
  • Patent number: 7358327
    Abstract: An assembled hematin is formed by depositing hematin on an electrically charged substrate in one or more layers alternating with one or more layers of polyelectrolyte, preferably a cationic polymer. In a method for polymerizing an aromatic monomer, the assembled hematin is contacted with the monomer and a template, preferably an anionic polymer. In a method for polymerizing aniline, the aniline, sulfonated multi walled carbon nano tubes, PEG hematin and a reaction initiator are dispersed in water.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: April 15, 2008
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ferdinando Bruno, Lynne A. Samuelson, Ramaswamy Nagarajan, Jayant Kumar, Michael Sennett
  • Patent number: 7344751
    Abstract: An assembled hematin is formed by depositing hematin on an electrically charged substrate in one or more layers alternating with one or more layers of polyelectrolyte, preferably a cationic polymer. In a method for polymerizing an aromatic monomer, the assembled hematin is contacted with the monomer and a template, preferably an anionic polymer. In a method for polymerizing aniline, the aniline, sulfonated multi walled carbon nano tubes, PEG hematin and a reaction initiator are dispersed in water.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: March 18, 2008
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ferdinando Bruno, Lynne A. Samuelson, Ramaswamy Nagarajan, Jayant Kumar, Michael Sennett
  • Patent number: 7335427
    Abstract: A process for repairing a turbine component of a turbomachine, as well as a sintered preform used in the process and a high gamma-prime nickel-base superalloy component repaired thereby. The sintered preform contains a sintered mixture of powders of a cobalt-base braze alloy and a cobalt-base wear-resistant alloy. The braze alloy constitutes at least about 10 up to about 35 weight percent of the sintered preform and contains a melting point depressant such as boron. The preform is formed by mixing powders of the braze and wear-resistant alloys to form a powder mixture, and then sintering the powder mixture. To use the preform, a surface portion of the turbine component is removed to expose a subsurface portion, followed by diffusion bonding of the preform to the subsurface portion to form a wear-resistant repair material containing the braze alloy dispersed in a matrix of the wear-resistant alloy.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: February 26, 2008
    Assignee: General Electric Company
    Inventor: Sujith Sathian
  • Patent number: 7323254
    Abstract: The invention relates to an alloy consisting of at least three components A, B, C, which form at least a first matrix and a soft phase dispersed therein, with a first surface (5) and a second surface (9) lying opposite it, the proportions of components A, B, C in the alloy being different from one another in the regions of the first (5) and the second surface (8). At least one of the components forms a hard phase and at least one of the other components forms another matrix different from the first matrix, the first matrix being disposed at least in the region of the first surface (5) and the other matrix being disposed at least in the region of the second surface (8), whilst the hard phase is dispersed through both the first and the other matrix.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: January 29, 2008
    Assignee: Miba Gleitlager GmbH
    Inventor: Walter Gärtner
  • 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
  • Patent number: 7205020
    Abstract: A magnetic recording medium has a non-magnetic under-layer, a magnetic layer, a protective film and a liquid lubricant layer sequentially laminated on a non-magnetic substrate. The magnetic layer has a multi-layer structure laminated with two or more magnetic layer components, each of the magnetic layer components having ferromagnetic grains and non-magnetic grain boundaries surrounding the grain. The resulting magnetic recording medium has a granular magnetic layer exhibiting very high Hc accompanying high density of magnetic recording, while decreasing the amount of platinum needed for attaining the high Hc, and reducing media noise accompanying the high recording density.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: April 17, 2007
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Tadaaki Oikawa, Hiroyuki Uwazumi, Takahiro Shimizu, Naoki Takizawa
  • Patent number: 7175920
    Abstract: The present invention is to provide an ultra-thin copper foil with a carrier which comprises a release layer, a diffusion preventive layer and a copper electroplating layer laminated in this order, or a diffusion preventive layer, a release layer and a copper electroplating layer laminated in this order on the surface of a carrier foil, wherein a surface of the copper electroplating layer is roughened; a copper-clad laminated board comprising the ultra-thin copper foil with a carrier being laminated on a resin substrate; a printed wiring board comprising the copper-clad laminated board on the ultra-thin copper foil of which is formed a wiring pattern; and a multi-layered printed wiring board which comprising a plural number of the above printed wiring board being laminated.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: February 13, 2007
    Assignee: Circuit Foil Japan Co., Ltd.
    Inventors: Akitoshi Suzuki, Shin Fukuda, Kazuhiro Hoshino, Tadao Nakaoka
  • Patent number: 7156280
    Abstract: A nickel-based high-temperature braze alloy composition includes Cr, Hf, and B. Furthermore, a cobalt-based high-temperature braze alloy composition includes Cr, Hf, and B. The braze alloys can be used, for example, as a single homogenous braze. The braze alloys can also be used, for example, as a component in a wide gap braze mixture where higher or lower melting point superalloy and/or brazing powder is used. The braze alloys may permit joining/repairing of superalloy articles with complex shape and may be used in high temperature applications.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: January 2, 2007
    Assignee: General Electric Company
    Inventors: Liang Jiang, Laurent Cretegny, Warren M. Miglietti
  • Patent number: 7144544
    Abstract: An ultraviolet (UV) light curable formulation useful for repairing composite materials, comprising: an acrylic oligomer, an acrylic monomer, and a photoinitiator. This formulation may include fiberglass. The photoinitiator can be a combination of a bis-acylphosphine oxide and an alpha hydroxy ketone. The formulation can cure rapidly, such as in about 20 minutes. The cured formulation can have a Tg above 150° C.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: December 5, 2006
    Assignee: Texas Research International, Inc.
    Inventors: John W. Bulluck, Brad A. Rix
  • Patent number: 7132149
    Abstract: A data storage medium includes a haze-prevention layer between a heat-resistant thermoplastic substrate and a reflective metal layer. The haze-prevention layer includes a metal having a tensile modulus of at least about 15×106 pounds per square inch. The data storage medium resists hazing of the reflective layer at elevated temperatures.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: November 7, 2006
    Assignee: General Electric Company
    Inventors: Keith M. Borst, Robert R. Gallucci, Charles D. Iacovangelo, Donald G. LeGrand
  • Patent number: 7129194
    Abstract: An improved catalyst system that includes a metal support structure and an anti-corrosive layer on the metal support structure, and has improved resistance to corrosion and other degradation under corrosive environments. Typically, a catalyst supporting layer is applied over the anti-corrosive layer.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: October 31, 2006
    Assignee: Corning Incorporated
    Inventors: Adra S. Baca, Lin He, Youchun Shi, Charles M. Sorensen, Jr.
  • Patent number: 7128959
    Abstract: A reflective article useful, for example, in automotive headlights includes a haze-prevention layer between a heat-resistant thermoplastic substrate and a reflective metal layer. The haze-prevention layer includes a metal having a tensile modulus of at least about 15×106 pounds per square inch. The article resists hazing of the reflective layer at elevated temperatures.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: October 31, 2006
    Assignee: General Electric Company
    Inventors: Keith M. Borst, Robert R. Gallucci, Charles D. Iacovangelo, Donald G. LeGrand
  • Patent number: 7101600
    Abstract: A perpendicular magnetic recording disk is provided. The perpendicular magnetic recording disk includes an underlayer between a substrate and a perpendicular magnetic recording layer for inducing perpendicular orientation of the perpendicular magnetic recording layer, the perpendicular magnetic recording layer having a thickness in the range where the ratio of perpendicular coercivity Hc to maximum perpendicular coercivity Ho decreases with reduced thickness of the perpendicular magnetic recording layer.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: September 5, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jai-young Kim
  • Patent number: 7094474
    Abstract: A composite powder includes an FeMo based first powder including between about 20% and about 55% by weight Fe and between about 45% and about 80% by weight of Mo. The composite powder also includes an aluminum bronze based second powder blended with the FeMo based first powder.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: August 22, 2006
    Assignee: Caterpillar, Inc.
    Inventors: Sang-Ha Leigh, Hyung K. Yoon
  • Patent number: 7067201
    Abstract: A method of reducing stress and wear on one or more components in a keel joint assembly in which a cobalt-based, wear resistant alloy coating is applied to the surfaces of one or more components. The use of the coating reduces stress and wear and achieves improved corrosion, galling, erosion and abrasion resistance as compared to other currently known and applied methods. In the present invention, the coating would preferably would be applied to the surfaces of the mating components of the keel joint.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: June 27, 2006
    Assignee: Vetco Gray Inc.
    Inventors: Fife B. Ellis, Kim H. Phan, Eric J. Schultz
  • Patent number: 7022420
    Abstract: An assembled hematin is formed by depositing hematin on an electrically charged substrate in one or more layers alternating with one or more layers of polyelectrolyte, preferably a cationic polymer. In a method for polymerizing an aromatic monomer, the assembled hematin is contacted with the monomer and a template, preferably an anionic polymer. In a method for polymerizing aniline, the aniline, sulfonated multi walled carbon nano tubes, PEG hematin and a reaction initiator are dispersed in water.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: April 4, 2006
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ferdinando Bruno, Lynne A. Samuelson, Ramaswamy Nagarajan, Jayant Kumar, Michael Sennett
  • Patent number: 7018411
    Abstract: A bone replacement endoprosthesis has a metallic support structure, at least part of the surface of which is galvanically silvered. Beneath the silver layer a bond layer is provided which can comprise gold.
    Type: Grant
    Filed: February 18, 2002
    Date of Patent: March 28, 2006
    Assignee: Implantcast GmbH
    Inventors: Georg Gosheger, Jens Sass
  • Patent number: 7014923
    Abstract: A gas turbine component consists of a superalloy base material with a single crystal structure and a protective MCrAlY-coating. The MCrAlY-coating the MCrAlY has a ?/?-phase and single crystal structure, which is epitaxial with the base material.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: March 21, 2006
    Assignee: Alstom Technology LTD
    Inventors: Alexander Schnell, Cyrille Bezencon, Matthias Hoebel, Abdus Suttar Khan, Maxim Konter, Wilfried Kurz
  • Patent number: 6994919
    Abstract: The invention relates to a brazing sheet product including a core sheet, on at least one side of the core sheet a clad layer of an aluminum alloy including silicon in an amount in the range of 4 to 14% by weight, and further including on at least one outersurface of the clad layer a plated layer of nickel-tin alloy, such that the clad layer and all layers exterior thereto form a metal filler for a brazing operation and have a composition with the proviso that the mol-ratio of Ni:Sn is in the range of 10:(0.5 to 9).
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: February 7, 2006
    Assignees: Corus Aluminium Walzprodukte GmbH, Corus Technology BV
    Inventors: Jacques Hubert Olga Joseph Wijenberg, Adrianus Jacobus Wittebrood, Joop Nicolaas Mooij
  • Patent number: 6986951
    Abstract: The present invention relates to a cobalt-based alloy for the coating of organs subject to erosion by liquid comprising chromium 28–32% by weight, tungsten 6–8% by weight, silicon 0.1–2% by weight, carbon 1.2–1.7% by weight, nickel 3–6% by weight, molybdenum 1–3%, cobalt the complement to 100%. The invention also relates to an application method of the alloy on organs subject to erosion by liquid, in particular vapour turbine blades, to reduce the metal erosion rate following impact with liquids.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: January 17, 2006
    Assignee: Nuovo Pignone Holdings S.p.A.
    Inventor: Massimo Giannozzi
  • Patent number: 6984458
    Abstract: The present invention relates to a method for treating organs subject to erosion by liquids, in particular vapour turbine components, which contemplates laser plating with a cobalt-based alloy comprising chromium from 28 to 32% by weight; tungsten from 5 to 7% by weight; silicon from 0.1 to 2% by weight; carbon from 1.2 to 1.7% by weight; nickel from 0.5 to 3% by weight; iron from 0.01 to 1% by weight; manganese from 0.01 to 1% by weight; molybdenum from 0.2 to 1% by weight; possible impurities or other elements from 0 to 0.5% by weight and cobalt the complement to 100%.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: January 10, 2006
    Assignee: Nuovo Pignone Holding S.p.A.
    Inventor: Massimo Giannozzi
  • Patent number: 6967061
    Abstract: High density longitudinal magnetic recording media are formed with two magnetic layers for enhanced SMNR, high signal, low PW 50 and high resolution. The bilayer magnetic structure comprises a first magnetic layer optimized for SMNR and a second magnetic layer formed directly on the first magnetic layer and optimized for Ms. Embodiments of the present invention include first and second magnetic layers containing Co, Cr and Pt, wherein the first magnetic layer has a higher Cr content than the second magnetic layer and the second magnetic layer has a higher Co content than the first magnetic layer.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: November 22, 2005
    Assignee: Seagate Technology LLC
    Inventors: Mariana Munteanu, Kuo-Hsing Hwang
  • Patent number: 6939622
    Abstract: A copper foil having a high etching factor, enabling formation of fine patterns excellent in linearity of bottom lines of circuit patterns and without leaving particles of copper foil forming the circuit patterns in the resin, free from a drop in bond strength between the copper foil and resin substrate due to the processing for formation of solder balls, excellent in visibility, and excellent in mounting of ICs on fine patterns, comprising a copper foil on at least one surface of which is provided an alloy fine roughening particle layer comprised of a copper-cobalt-nickel alloy with contents of cobalt and nickel equal to or greater than that of copper, specifically a copper foil on the surface of the copper foil for bonding with the resin substrate of which is provided an alloy fine roughening particle layer comprised of 5 to 12 mg/dm2 copper, 6 to 13 mg/dm2 cobalt, and 5 to 12 mg/dm2 nickel, wherein the alloy fine roughening particle layer provided on the copper foil surface may be treated for stainproof or
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: September 6, 2005
    Assignee: Furukawa Circuit Foil Co., LTD
    Inventors: Yasuhisa Yoshihara, Hisao Kimijima
  • Patent number: 6936352
    Abstract: A magnetic recording medium can be produced without substrate heating during sputtering. The recording medium has a substrate, an underlayer of a nonmagnetic film with a bcc structure formed on the substrate, an intermediated layer of a nonmagnetic film with an hcp structure formed on the underlayer, a magnetic layer of a magnetic film with an hcp structure formed on the intermediate layer, and a protective layer formed on the magnetic layer. Materials used for the underlayer, the intermediate layer, and the magnetic layer has spacings between principal lattice planes of the respective crystals that can be expresses as d1 (between (110) planes in the underlayer)>d2 (between (002) planes in the intermediate layer)>d3 (between (002) planes in the magnetic layer).
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: August 30, 2005
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Michio Ohsawa, Akihiro Otsuki
  • Patent number: 6929705
    Abstract: The present invention relates to metallic sheets having an improved antimicrobial property and also related to a method of manufacturing such sheets. More particularly, it relates to the continuous coating on metallic sheets with a resin composition containing antimicrobial additives. The surface of the metallic article is afforded antimicrobial properties by coating a liquid dispersion or solution of fine particles made of an antimicrobial ingredient on the surface of the metallic sheet dispersed in a uniform layer and cured or dried to affix to the metallic surface. The inorganic antibacterial particles are metal component-supporting oxides and zeolite powders. The inorganic antibacterial core particles have at least a primary surface coating of at least one metal or metal compound having antimicrobial properties. Roll coaters apply the coating.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: August 16, 2005
    Assignee: AK Steel Corporation
    Inventors: Frederick A. Myers, LeRoy R. Price
  • Patent number: 6913837
    Abstract: A perpendicular magnetic recording medium and method thereof, includes a nonmagnetic substrate; a soft magnetic under layer; an intermediate layer; a bilayer magnetic recording layer; a protective layer; and a liquid lubricant layer. According to a following order, the soft magnetic under layer, the intermediate layer, the bilayer magnetic recording layer, the protective layer, and the liquid lubricant layer are sequentially stacked on the nonmagnetic substrate. The bilayer magnetic recording layer includes a first magnetic layer including a CoCr alloy crystalline film, and a second magnetic layer including a rare earth-transition metal alloy noncrystalline film.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: July 5, 2005
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yasushi Sakai, Hiroyuki Uwazumi, Kazuo Enomoto, Sadayuki Watanabe
  • Patent number: 6913839
    Abstract: A coated article having a high resistance to particle-impact damage has a substrate, and a layered coating overlying the substrate. The layered coating includes a substantially continuous quasicrystalline layer, and a substantially continuous ductile metallic layer in facing contact with the quasicrystalline layer. The coated article is preferably used in applications where it is subjected to particle-impact conditions.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: July 5, 2005
    Assignee: General Electric Company
    Inventors: Ramgopal Darolia, Robert Edward Schafrik
  • Patent number: 6913836
    Abstract: A spin-valve type magnetoresistive sensor with a bias structure enabling a magnetization direction of a free magnetic layer to be uniformly arranged with certainty. The spin-valve type magnetoresistive sensor comprises an antiferromagnetic layer; a pinned magnetic layer having a magnetization direction made stationary; a nonmagnetic electrically conductive layer formed between the pinned magnetic layer and a free magnetic layer; soft magnetic layers that are arranged on the free magnetic layer while a spacing corresponding to a track width is left between the soft magnetic layers and that fill recesses in the free magnetic layer on both sides of an area corresponding to the track width; bias layers formed on the soft magnetic layers; and electrically conductive layers. The antiferromagnetic layer and the bias layers are each made of an alloy containing at least one or more elements selected from among Pt, Pd, Rh, Ru, Ir, Os, Au, Ag, Cr, Ni, Ne, Ar, Xe and Kr, as well as Mn.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: July 5, 2005
    Assignee: Alps Electric Co., Ltd.
    Inventor: Naoya Hasegawa
  • Patent number: 6908691
    Abstract: The aim of the invention is to provide a metal strip for epitaxial coating with a biaxially textured layer, this metal strip, however, being able to be produced in an uncomplicated manner and having a high tensile strength, low magnetic losses and/or a high electrical conductivity. According to the invention, the metal strip is comprised of Nj, Cu, Ag or alloys thereof all serving as basic material, whereby the one-layer metal strip and, in the instance of a multilayer metal strip, at least one of its layers contains 10 nm to 5 ?m large, strength-increasing dispersoids comprised of carbides, borides, oxides and/or nitrides with a volume proportion ranging from 0.1 to 5%. In the instance of a multilayer metal strip, the layers form a composite, and at least one of the layers does not contain any dispersoids and has a biaxial texture. For the production, a starting material is used, which is comprised of Ni, Cu, Ag or of alloys thereof all serving as basic material and which contains 0.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: June 21, 2005
    Assignee: Institut fuer Festkoerper-und Werkstoffforschung Dresden e.V.
    Inventors: Bernd De Boer, Bernhard Holzapfel, Gunter Risse
  • Patent number: 6902826
    Abstract: A film structure and deposition method for creating laminated Fe—M—N and Fe—M—O—N films which retain good anisotropy after HA annealing are provided. Interleaved layers of thin alumina laminations between the Fe—M—[O]—N layers and sublayer alumina nanolaminations within the Fe—M—[O]—N layers create stable magnetic anisotropy in the film. The magnetic anisotropy in the film survives HA annealing at hardbake resist curing conditions in wafer manufacturing processes for GMR magnetic recording heads.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: June 7, 2005
    Assignee: International Business Machines Corporation
    Inventor: John David Westwood
  • Patent number: 6899959
    Abstract: A magnetic recording medium includes a substrate, an underlayer, a lower magnetic layer formed on the underlayer, an intermediate layer, and an upper magnetic layer formed on the intermediate layer. The intermediate layer is typically Ru, and promotes antiferromagnetic coupling between the upper and lower magnetic layers. The upper and lower magnetic layers are typically Co alloys. The lower magnetic layer has a high saturation magnetization Ms to promote high exchange coupling between the upper and lower magnetic layers. The dynamic coercivity of the lower magnetic layer is lower than the exchange field to ensure rapid switching of the lower magnetic layer.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: May 31, 2005
    Assignee: Komag, Inc.
    Inventors: Gerardo Bertero, Sudhir Malhotra, David Wachenschwanz, Zhengsheng Shan, Donald Stafford
  • Patent number: 6896978
    Abstract: In the joint construction of cobalt-based alloy, a cobalt-based alloy layer 1, in which granular or massive eutectic carbide 2 disperses, is joined to a metal of a base metal 37 via an insert metal layer 36. For the joint construction of cobalt-based alloy, liquid phase diffusion bonding is performed at a temperature of 1100° C. for a retention time of 1 hour with an insert metal with a thickness of about 40 ?m being interposed between the base metal, which is S45C carbon steel, and a cobalt-based alloy material which has granular or massive eutectic carbide with a grain size not larger than 30 ?m in a matrix of cast structure and contains 1.03 wt % C, 29.73 wt % Cr, 3.86 wt % W, 2.59 wt % Ni, 2.67 wt % Fe, 0.59 wt % Si, and 0.07 wt % Mo, the balance substantially being Co. The cobalt-based alloy layer 1 after bonding contains granular or massive eutectic carbide.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: May 24, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihisa Kiyotoki, Mitsuo Chigasaki, Shizuo Matsushita, Jiro Kuniya, Takahiko Kato, Yoshiteru Chiba
  • Patent number: 6893735
    Abstract: A magnetic recording medium includes a nonmagnetic underlayer, an initial magnetic layer, a nonmagnetic spacer layer provided on the initial magnetic layer, and a final magnetic layer provided on the nonmagnetic spacer layer. The initial magnetic layer is disposed closer to the nonmagnetic underlayer than the final magnetic layer, and the initial and final magnetic layers are made of mutually different compositions and are anti-ferromagnetically coupled.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: May 17, 2005
    Assignee: Fujitsu Limited
    Inventors: B. Ramamurthy Acharya, E. Noel Abarra
  • Patent number: 6893740
    Abstract: A magnetoresistive sensor and a method of manufacturing the magnetoresistive sensor are provided, which can effectively increase ?RA, and which can more easily and reliably bring magnetization of a free magnetic layer and magnetization of a pinned magnetic layer into an orthogonal state than the related art. By forming the pinned magnetic layer of a multilayered structure comprising a first hard magnetic layer, a nonmagnetic layer, and a second hard magnetic layer, the magnetization of the free magnetic layer and the magnetization of the pinned magnetic layer can be more easily and reliably brought into an orthogonal state than in the related art. Also, the pinned magnetic layer can be formed in a larger film thickness than that in the related art. Accordingly, the product (?RA) of a resistance change amount (?R) and a sensor area (A) in a direction parallel to film surfaces can be increased.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: May 17, 2005
    Assignee: Alps Electric Co., Ltd.
    Inventor: Masamichi Saito
  • Patent number: 6893738
    Abstract: An electrodeposited copper foil to be laminated on an insulation substrate for a printed circuit board, comprising a barrier layer of ternary alloy of Zn—Co—As formed on the copper foil, is provided. Further, a surface treatment method of an electrodeposited copper foil for a printed circuit board, comprising electrolytically treating the copper foil in an electrolytic solution containing pyrophosphoric acid potassium of about 10 g/l to about 200 g/l, Zn of about 0.1 g/l to about 20 g/l, Co of about 0.1 g/l to about 20 g/l and As of about 0.05 g/l to about 5 g/l, is provided. Further, the electrolytic solution remains at the temperature of about 20° C. to about 50° C. and a pH of about 9 to about 13. The copper foil is electrolytically treated for about 2 seconds to about 20 seconds at a cathode current density of about 0.5 A/dm2 to about 20 A/dm2.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: May 17, 2005
    Assignee: LG Cable Ltd.
    Inventors: Sang-Kyum Kim, Chang-Hee Choi
  • Patent number: 6890667
    Abstract: A magnetic recording medium having a soft magnetic underlayer structure that includes two soft underlayers is presented. A thick first soft underlayer, disposed on the medium substrate, is made of material which provides a low magnitude of magnetization saturation (Bsat) and high permeability. The first soft underlayer can be formed by plating or high-rate sputtering. The second soft underlayer, which has a lesser thickness than the first soft underlayer, is made of a material which provides a relatively high magnitude of Bsat and low permeability. The second soft underlayer can be formed by low-rate sputtering. The first soft under layer can be isolated from other layers in the medium by an exchange isolation layer. The second soft underlayer can be exchange coupled to a radial exchange pin layer disposed on the exchange isolation layer.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: May 10, 2005
    Assignee: Maxtor Corporation
    Inventors: Bruce Lairson, Mourad Benakli
  • Patent number: 6886809
    Abstract: In the joint construction of cobalt-based alloy, a cobalt-based alloy layer 1, in which granular or massive eutectic carbide 2 disperses, is joined to a metal of a base metal 37 via an insert metal layer 36. For the joint construction of cobalt-based alloy, liquid phase diffusion bonding is performed at a temperature of 1100° C. for a retention time of 1 hour with an insert metal with a thickness of about 40 ?m being interposed between the base metal, which is S45C carbon steel, and a cobalt-based alloy material which has granular or massive eutectic carbide with a grain size not larger than 30 ?m in a matrix of cast structure and contains 1.03 wt % C, 29.73 wt % Cr, 3.86 wt % W, 2.59 wt % Ni, 2.67 wt % Fe, 0.59 wt % Si, and 0.07 wt % Mo, the balance substantially being Co. The cobalt-based alloy layer 1 after bonding contains granular or massive eutectic carbide.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: May 3, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihisa Kiyotoki, Mitsuo Chigasaki, Shizuo Matsushita, Jiro Kuniya, Takahiko Kato, Yoshiteru Chiba
  • Patent number: 6884519
    Abstract: A magnetic recording medium having excellent magnetic read/write characteristics and thermal stability characteristics, and a method of manufacturing therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium comprises an orientation control film 3 that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film 5, of which the axis of easy magnetization is generally oriented perpendicular to a substrate, and a protective film 6, that are provided on a non-magnetic substrate 1, wherein the orientation control film 3 is made of a non-magnetic material which contains 33 to 80 at % of Ni and one or more kinds of elements selected from Sc, Y, Ti, Zr, Hf, Nb and Ta.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 26, 2005
    Assignees: Showa Denko K.K., Toshiba Corporation
    Inventors: Kenji Shimizu, Akira Sakawaki, Hui Yang, Hiro Mochizuki, Hiroshi Sakai, Takashi Hikosaka, Soichi Oikawa
  • Patent number: 6881496
    Abstract: A magnetic recording medium has first, second and third magnetic layers having magnetization directions which are alternately antiparallel in a state where no external magnetic field is applied on the magnetic recording medium, with a first nonmagnetic layer interposed between the first and second magnetic layers and a second nonmagnetic layer interposed between the second and third magnetic layers. A relationship Ms2×t2<(Ms1×t1+Ms3×t3) stands, where Ms1, Ms2 and Ms3, and t1, t2 and t2 respectively denote saturation magnetizations and thicknesses of the first, second and third magnetic layers.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: April 19, 2005
    Assignee: Fujitsu Limited
    Inventor: Iwao Okamoto
  • Patent number: 6881497
    Abstract: A thermal spring magnetic medium is provided having first and second stacks providing two exchange coupled ferromagnetic layers having different Curie temperatures. The first stack has a high magneto-crystalline anisotropy, a relatively low saturation magnetization and a low Curie temperature. The second stack has a relatively low magneto-crystalline anisotropy, a high saturation magnetization and a high Curie temperature. Preferably the first stack includes an alloy of Fe—Pt or Co—Pt, and the second stack includes an allow of Co—Pt or Co—Pd. A disk drive system having the novel medium is also provided.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: April 19, 2005
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kevin Robert Coffey, Jan-Ulrich Thiele, Dieter Klaus Weller
  • Patent number: 6881503
    Abstract: A perpendicular magnetic recording medium comprises a hard magnetic recording layer, a soft magnetic layer, and a non-magnetic intermediate layer between the hard magnetic recording-layer and the soft magnetic layer, wherein the hard magnetic recording layer includes an hcp-structured layer and a Co-alloy layer which may be either a Co3Pt-alloy layer or an hcp CoPt-based alloy layer positioned adjacent to the hcp-structured layer. A magnetic disc drive storage system that includes the perpendicular magnetic recording medium is also included.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: April 19, 2005
    Assignee: Seagate Technology LLC
    Inventors: Bin Lu, Dieter K. Weller
  • Patent number: 6878439
    Abstract: A magnetic recording medium and a magnetic recording device using the same. The magnetic recording medium has a nonmagnetic substrate having applied thereon, through a crystal orientation-improving layer and a seed layer, a magnetic recording layer. The seed layer consists of a material having a higher surface energy than that of the crystal orientation-improving layer.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: April 12, 2005
    Assignee: Fujitsu Limited
    Inventors: Hiroyoshi Kodama, Nobutaka Ihara, Takuya Uzumaki
  • Patent number: 6878459
    Abstract: A magnetic recording medium was a high normalized coercive force and superior thermal stability. The magnetic recording medium comprises a non-magnetic base material, and a ferromagnetic metal layer of cobalt based alloy formed on top of this base material with a metal underlayer disposed therebetween, and displays a coercive force Hc of at least 2000 (Oe) and an anisotropic magnetic field Hkgrain of at least 10,000 (Oe). Furthermore, magnetic recording media in which the aforementioned metal underlayer and/or the ferromagnetic metal layer are fabricated in a film fabrication chamber with an ultimate vacuum at the 10?9 Torr level are preferred. A magnetic recording medium according to the present invention can be ideally applied to hard disks, floppy disks, and magnetic tapes and the like.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: April 12, 2005
    Assignees: Anelva Corporation, Fuji Electric Co., Ltd., Showa Denko K.K.
    Inventors: Migaku Takahashi, David Djayaprawira, Kazuya Komiyama, Satoru Yoshimura
  • Patent number: 6869671
    Abstract: A thin film based nanoporous alumina template has been developed which allows the in situ removal of an electrically insulating alumina barrier layer at the pore bases. This barrier free nanoporous system has great utility for electrodeposition of a wide variety of nanowire materials. An exemplary multilayer thin film precursor is provided comprising Al (anodization layer), Ti (diffusion barrier) and Pt (active electrode) on a Si substrate. Aluminum anodization in sulfuric acid with a subsequent applied voltage ramping program produces a Pt electrode at the base of the nanopores without the additional steps of alumina removal, barrier layer dissolution, and metal deposition onto the pore bottoms.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: March 22, 2005
    Assignee: University of Notre Dame
    Inventors: Michael M. Crouse, Albert E. Miller, Juan Jiang, David T. Crouse, Subash C. Basu
  • Patent number: 6869688
    Abstract: A magnetic recording medium comprising a flexible support and a magnetic layer selected from a cobalt/palladium multilayer film and a cobalt/platinum multilayer film.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: March 22, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kazuyuki Usuki
  • Patent number: 6866948
    Abstract: A magnetic recording medium based on the perpendicular recording system, which has high coercivity and low medium noise, is provided by using an underlayer which has a thin film thickness and which makes it possible to improve the orientation of a recording layer. The magnetic recording medium based on the perpendicular recording system has the recording layer which is formed of a CoPtCr alloy magnetic film containing oxygen. The magnetic recording medium has such a structure that an adhesive layer 2, a soft magnetic back layer 3, the underlayer 4, the recording layer 5, and a protective layer 6 are successively stacked on a substrate 1. A CoCrRu film, which has a film thickness of 5 nm to 20 nm, is used as the underlayer for the recording layer formed of the CoPtCr alloy magnetic film containing oxygen. Thus, it is possible to improve the crystalline orientation of the recording layer with the underlayer having the thin film thickness.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: March 15, 2005
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Tetsunori Koda, Hideaki Yamanaka, Enji Fujita, Satoshi Matsunuma
  • Patent number: 6863993
    Abstract: A thin film structure for a magnetic thin film recording medium including a dual seed layer of RuAl/NiAlB is disclosed. The use of the RuAl/NiAlB structure provides reduced grain size, an increased Mrt orientation ratio (OR), increased SNR and lower PW50 at higher amplitude. The RuAl and NiAlB seed layers each have a B2 crystallographic structure. The RuAl/NiAlB dual seed layer can be used to obtain an underlayer with a preferred in-plane orientation of (200) and a cobalt alloy magnetic film with the preferred in-plane orientation of (11{overscore ( )}20).
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: March 8, 2005
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Mary Frances Doerner, Kai Tang, Qi-Fan Xiao
  • Patent number: 6863991
    Abstract: A coated metallic mesh having a molecular layer thereon comprising: (1) a metallic mesh comprising at least one aperture; (2) a coating disposed on the metallic mesh that at least partially fills at least one aperture so as to form a partially-filled aperture; and (3) a molecular layer comprising at least one molecule having a hydrophilic region and a hydrophobic region, wherein the hydrophilic region at least partially extends into the partially-filled aperture. Also, provided are coated metallic meshes having bilayers and a method of providing a molecular layer to a coated mesh.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: March 8, 2005
    Assignee: The Ohio State University
    Inventors: James V. Coe, Shaun M. Williams, Kenneth R. Rodriguez
  • Patent number: 6862159
    Abstract: A magnetic sensing element includes a lower multilayer film including a lower pinned magnetic layer, a lower nonmagnetic layer, a free magnetic layer, an upper nonmagnetic layer, and an upper pinned magnetic layer; and an upper multilayer film including a lower pinned magnetic layer, a lower nonmagnetic layer, a free magnetic layer, an upper nonmagnetic layer, and an upper pinned magnetic layer. Each pinned magnetic layer includes a first pinned magnetic sublayer, a second pinned magnetic sublayer, and an intermediate nonmagnetic sublayer. By setting the magnetization direction of the second pinned magnetic sublayers in the lower multilayer film antiparallel to the second pinned magnetic sublayers in the upper multilayer film, the magnetic sensing element can output a pulsed signal directly when moving over a magnetization transition region.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: March 1, 2005
    Assignee: Alps Electric Co., Ltd.
    Inventor: Naoya Hasegawa
  • Patent number: 6861156
    Abstract: A metal fiber-reinforced composite material can be produced by providing metal layers and reinforcing layers disposed alternately into a sandwich structure, the reinforcing layers containing fibers of a high-strength metallic material, which are disposed in the form of a loose structure between the metal layers, in order to create a material excess of fibers in the reinforcing layers, the sandwich structure being bonded by a thermomechanical process in such a manner, that the fibers are lengthened because of the excess of material, the sandwich structure being bonded.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: March 1, 2005
    Assignee: EADS Deutschland GmbH
    Inventor: Frank Palm