Patents Examined by Paul Thibodeau
  • Patent number: 6756128
    Abstract: A low resistance magnetic tunnel junction device, such as a memory cell in a nonvolatile magnetic random access memory (MRAM) array or a magnetoresistive read head in a magnetic recording disk drive, has a titanium oxynitride (TiOxNy) layer as the single-layer tunnel barrier or as one of the layers in a bilayer tunnel barrier. In a bilayer barrier the other barrier layer is an oxide or nitride of Al, Si, Mg, Ta, [[Si]] and Y, such as Al2O3, AlN, Si3N4, MgO, Ta2O5, TiO2, or Y2O3. The Ti barrier material can be alloyed with other known metals, such as Al and Mg, to produce barriers with TiAlOxNy and TiMgOxNy compositions.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: June 29, 2004
    Assignee: International Business Machines Corporation
    Inventors: Matthew J. Carey, Bruce A. Gurney, Yongho Ju
  • Patent number: 6753075
    Abstract: An infrared camouflaging system comprises a thermorefractive layer system or a thermorefractive material, whose thermal emissivity has a negative temperature coefficient.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: June 22, 2004
    Assignee: OGUS Netze & Wirkwaren GmbH & Co. KG
    Inventors: Andreas Leupolz, Werner Scherber, Walter Rothmund
  • Patent number: 6749920
    Abstract: Using a combination of relatively coarse filler and latex binder, a high solids coating which has a minimum solids content of about 60% by volume, can be produced with a relatively low working viscosity. These very high solids coatings can be applied in thick single layers and oven cured without cracking. They maintain more than 80% of their original wet thickness. The resulting coating provides an extremely hard and durable surface, even on relatively soft mineral fiber board ceiling tiles or wall panels.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: June 15, 2004
    Assignee: AWI Licensing Company
    Inventors: Kenneth G. Caldwell, James L. Work
  • Patent number: 6746749
    Abstract: The magnetic recording medium includes an underlayer 12 formed of an inorganic compound layer, and a magnetic layer 13 formed over the underlayer 12. The inorganic compound layer as the underlayer 12 has crystal grains and at least one kind of oxide, the crystal grains having as main elements at least one of cobalt oxide, chromium oxide, iron oxide and nickel, the at least one kind of oxide lying as a non-crystalline phase in grain boundaries between the crystal grains and selected from among silicon oxide, aluminum oxide, titanium oxide, tantalum oxide and zinc oxide.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: June 8, 2004
    Assignees: Hitachi, Ltd., Hitachi Maxell, Ltd.
    Inventors: Fumiyoshi Kirino, Nobuyuki Inaba, Hiroki Yamamoto, Ken Takahashi, Takashi Naitou, Motoyasu Terao, Sumio Hosaka, Eiji Koyama, Hiroki Kuramoto
  • Patent number: 6740412
    Abstract: Polymeric adhesive comprising a homogeneous mixture of at least three constituents: (a) at least one thermoplastic halogenated hydrocarbon polymer, (b) at least one copolymer of monoethylenic monomers which carry an alkyl carboxylate functional group and (c) at least one alpha-olefin polymer modified by the incorporation of at least one functional group chosen from a carboxyl, an acid anhydride, a hydroxyl and an epoxide. Process for the preparation of this polymeric adhesive and use of this polymeric adhesive in the preparation of structures with multiple polymeric layers. Structures with multiple polymeric layers comprising a layer (A) based on thermoplastic halogenated hydrocarbon polymer bonded to a layer (C) based on thermoplastic nonhalogenated polymer incompatible with (A) via a layer (B) based on this polymeric adhesive.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: May 25, 2004
    Assignee: Solvay (Societe Anonyme)
    Inventors: Jean-Marie Oreins, Vincent Thulliez, Guy Laurent, Fredy Declerck
  • Patent number: 6740397
    Abstract: A magnetic recording medium on glass or Al substrates with a film structure of subseedlayer/seedlayer/underlayer/magnetic layer/carbon overcoat, in this order, in which the subseedlayer comprises an element of Group VIb and the seedlayer comprises a material having a B2 structure.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: May 25, 2004
    Assignee: Seagate Technology LLC
    Inventor: Li-Lien Lee
  • Patent number: 6740383
    Abstract: A magnetic recording medium and a magnetic disk device using the same. The magnetic recording medium comprising a nonmagnetic substrate having applied thereon, through two or more chromium-based underlayers, a magnetic recording layer having a circumferential direction of easy magnetization and containing cobalt as a principal component thereof, and also containing chromium and platinum in combination with tantalum or tantalum and niobium. Using the magnetic recording medium, a reproducing output and S/N ratio can be increased without causing an increase in noise.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: May 25, 2004
    Assignee: Fujitsu Limited
    Inventors: Masayoshi Shinohara, Kenji Sato, Yuki Yoshida, Iwao Okamoto, Yasuji Ikeda, Kiyoshi Yamaguchi
  • Patent number: 6740398
    Abstract: Magnetic films comprising iridium, manganese and nitrogen (IrMnN) are disclosed. Multi-layer structures including ferromagnetic layers deposited on the IrMnN films are also disclosed. The IrMnN films have a (200) texture and may act as seed layers and/or exchange biasing layers for the ferromagnetic layers deposited thereon. The multi-layer structures are useful in applications such as read sensors for magnetic recording heads and soft magnetic underlayers for perpendicular magnetic recording media.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: May 25, 2004
    Assignee: Seagate Technology LLC
    Inventor: Christopher Loren Platt
  • Patent number: 6736919
    Abstract: The invention pertains to a method for making a laminate comprising at least the following steps: placing a metal sheet on a form tool or a substrate, placing an adhesive layer on top of the first metal sheet, placing a second metal sheet on top of the adhesive layer such that at least one of the metal sheets overlaps at least one edge of the other metal sheet, applying heat and pressure to the thus obtained stack, where during the application of pressure at least one of the metal sheets is bent towards the plane of the other metal sheet. Thus, complicated structures can be optimized for a certain application and, besides, manufactured in one go using comparatively inexpensive tools.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: May 18, 2004
    Assignee: Structural Laminates Company
    Inventor: Gerardus Hubertus Joannes Joseph Roebroeks
  • Patent number: 6730395
    Abstract: A fundamentally new magnetic tunnel junction technology based on the use of magnetic nanoparticles is disclosed. The hard layer of the device is composed of the nanoparticles, while the junction insulating barrier is composed of a carbon-based coating on the nanoparticles. This device offers a markedly different approach of tunnel junction fabrication and offers many advantages over the prior art technology, which is based on the use of oxidized aluminum as the insulating barrier.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: May 4, 2004
    Assignee: Seagate Technology LLC
    Inventor: Mark William Covington
  • Patent number: 6726990
    Abstract: A collection of silicon oxide nanoparticles have an average diameter from about 5 nm to about 100 nm. The collection of silicon oxide nanoparticles effectively include no particles with a diameter greater than about four times the average diameter. The particles generally have a spherical morphology. Methods for producing the nanoparticles involve laser pyrolysis. The silicon oxide nanoparticles are effective for the production of improved polishing compositions including compositions useful for chemical-mechanical polishing.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: April 27, 2004
    Assignee: NanoGram Corporation
    Inventors: Sujeet Kumar, Xiangxin Bi, Nobuyuki Kambe
  • Patent number: 6727007
    Abstract: A magneto-optical recording medium includes at least a reflective layer and a recording layer formed in this order on a substrate, in which record and reproduction of information are carried out by irradiating the medium with laser beam from a recording layer side. The reflective layer includes two or more thin film layers different in surface roughness, of which one near the substrate has a surface tension smaller than a surface tension of one near the recording layer. The medium exhibits a coercive force and CNR of a recording layer of a magneto-optical recording medium to realize high density recording by contriving the constitution of the recording layer.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: April 27, 2004
    Assignee: Fujitsu Limited
    Inventors: Takuya Kamimura, Tsutomu Tanaka, Koji Matsumoto
  • Patent number: 6723424
    Abstract: A molded article such as a floor tile is made from recycled carpet waste which includes a polyvinyl chloride component in the backing material and fiber component having a melting point above the melting point of polyvinyl chloride. A mixture of the recycled carpet material is shredded and additional polyvinyl chloride is fed to an extruder where the polyvinyl chloride is melted without melting the carpet fibers. The resulting mixture is discharged and molded, such as by injection molding, to form a molded product. The molded product includes a continuous matrix of polyvinyl chloride having recycled carpet fibers uniformly dispersed therein. The molded article contains about 45% to about 85% of polyvinyl chloride, about 5% to about 20% of recycled carpet fibers, up to about 5% of a plasticizer and up to about 5% of an ethylene copolymer by weight based on the total weight of the product.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: April 20, 2004
    Assignee: Selectech, Inc.
    Inventors: Thomas E. Ricciardelli, Michael H. King, Michael P. Slater, Steven F. Raposo
  • Patent number: 6723441
    Abstract: The present invention relates to a resin film laminated metal sheet for can, in which both faces of the metal sheet have resin film laminated layers, and a surface free energy &ggr;s of a face of the resin film is 10 dyn/cm or more to less than 30 dyn/cm, the face becoming an inside of can after can-making and being contacted with stuffed food contents. As the resin film, applicable is a polypropylene film or a propylene ethylene based random copolymer film of polypropylene being a main component. Further, a resin film of polyester being a main component and containing a wax component of 0.1 to 2.0% is used in a resin film to be an inside of can after can-making. The resin film laminated metal sheet for can according to the invention has excellent formability and adhesion while can-making and superior taking-out property of stuffed food contents.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: April 20, 2004
    Assignee: NKK Corporation
    Inventors: Yoichiro Yamanaka, Hiroki Iwasa, Hiroshi Kubo, Shinsuke Watanabe, Yoshinori Yomura
  • Patent number: 6723423
    Abstract: The present invention is relating to a transparent sheet or film which is good in productivity, high in transparency, excellent in antistatic property and reflection preventing property, high in hardness, and excellent in scratch resistance and solvent resistance. A transparent sheet or film of the present invention is a sheet or film having on one surface of a transparent support, a first electroconductive transparent layer comprising a cured layer of a resin containing fine particles of electroconductive zinc antimonate anhydride, and a second electroconductive transparent layer formed on the first layer, of which a refractive index is lower than that of the first layer.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: April 20, 2004
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Shoichi Kaneko, Hiroshi Sakurai, Takeshi Takahashi
  • Patent number: 6723450
    Abstract: A magnetic recording medium for data storage uses a magnetic recording layer having at least two ferromagnetic films with different remanent magnetization-thickness (Mrt) values that are coupled antiparallel across a nonferromagnetic spacer film predominantly by the dipole field (Hd) from the grains of the higher-Mrt ferromagnetic film. The material compositions and thicknesses of the ferromagnetic films and the nonferromagnetic spacer film are selected so that Hd predominates over any antiferromagnetic exchange coupling field (Haf) and is greater than the coercive field of the lower-Mrt ferromagnetic film. As a result, the magnetizations of the two ferromagnetic films are antiparallel in the two remanent magnetic states, and thus the net remanent magnetization-thickness product (Mrt) of the recording layer is the difference in the Mrt values of the two ferromagnetic films.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: April 20, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hoa Van Do, Mary F. Doerner, Eric Edward Fullerton, David Thomas Margulies, William G. McChesney, Manfred Ernst Schabes, Kai Tang
  • Patent number: 6720075
    Abstract: A magnetic recording medium stable against heat of which high density recording can be attained is provided by employing a magnetic material such that coercive magnetic force in a recording magnetic layer increases with temperature rise. The magnetic recording medium is one in which the recording magnetic layer in which magnetic recording is carried out comprises an N-type Ferrimagnetic material, and compensation temperature of this N-type Ferrimagnetic material is made to be higher than an operating temperature range in which the magnetic recording medium is used.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: April 13, 2004
    Assignee: Fujitsu Limited
    Inventors: Ikuya Tagawa, Koji Matsumoto
  • Patent number: 6716519
    Abstract: An air bag cover having a surface sheet including a thermoplastic elastomer decorative layer on the surface side. The breaking elongation and break strength of the thermoplastic elastomer decorative layer is adjusted utilizing a filler powder. Thereby, the breaking rapidity at a tear line groove formation position is improved.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: April 6, 2004
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Shigehiro Ueno, Akiyoshi Nagano, Akio Nakano, Kenichi Furuta, Hiroshi Suyama, Yukihiko Horiba, Yoshiaki Shichida, Toshikatsu Togawa
  • Patent number: 6716537
    Abstract: A magnetoresistive element includes a multilayered film comprising a magnetic detecting layer having a magnetoresistive effect, a pair of first antiferromagnetic layers in contact with the magnetic detecting layer of the multilayered film at a predetermined gap in the track width direction, the first antiferromagnetic layers aligning the magnetization direction of the magnetic detecting layer, and a pair of conductive layers in contact with the pair of first antiferromagnetic layers, the pair of conductive layers applying a detecting current to the multilayered film. The first antiferromagnetic layers are composed of an antiferromagnetic material having higher resistivity than that of the conductive layers. The conductive layers are superimposed with the corresponding first antiferromagnetic layers and are in contact with the magnetic detecting layer in a range of the predetermined gap.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: April 6, 2004
    Assignee: Alps Electric Co., Ltd.
    Inventor: Yoshihiko Kakihara
  • Patent number: RE38501
    Abstract: A method of recording information on and reproducing information from a magnetooptical recording medium which includes first and second magnetic layers. The method includes the step of projecting a light spot onto the medium. When reproducing information, the light spot is projected onto the medium from the side of the magnetic layer. In this method only a high temperature region of the second magnetic layer within a light spot projection portion is changed to a perpendicular magnetization film so that information recorded in the first magnetic layer is transferred to the perpendicular magnetization film of the second magnetic layer. In addition, information which is transferred to the second magnetic layer is detected by using reflected light from the medium which is subjected to the magneto-optic effect from the perpendicular magnetization film of the second magnetic layer.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: April 20, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoki Nishimura, Hiroshi Omata