Iron Group Metal (iron, Cobalt, Nickel) Patents (Class 252/513)
  • Patent number: 6921497
    Abstract: The present invention relates to new compositions of matter, particularly metals and alloys, and methods of making such compositions. The new compositions of matter exhibit long-range ordering and unique electronic character.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: July 26, 2005
    Assignee: Electromagnetics Corporation
    Inventor: Christopher J. Nagel
  • Patent number: 6921780
    Abstract: A conductive paste based on an elastomer of the polyoxypolyolefin type or on a member of the polyolefin family is described, provided with an admixture of conductive particles for the production, in the electronics industry, of a sealing element, of a contact element or of a heat-conduction element. This material is particularly suitable for the production of EMI-RFI gaskets, and, compared with materials known hitherto and based on silicone, has improved performance characteristics and environmental properties.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: July 26, 2005
    Assignee: Laird Technologies, Inc.
    Inventors: Jean-Alec Ducros, Mohamed Aït El Cadi
  • Patent number: 6906427
    Abstract: An electrical connection is formed by using a double laminated conductive fine particle provided with a conductive metal layer on the surface of a spherical elastic base particle by electroless plating and electroplating and a layer of a low-melting-point metal on the surface of the conductive metal layer and wherein the conductive metal layer comprises a plurality of metal layers.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: June 14, 2005
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Yoshiaki Tanaka, Yoshiaki Kodera, Manabu Matsubara, Kazuhiko Kanki, Tatsuo Suzuki, Kazuo Ukai
  • Patent number: 6896824
    Abstract: A heat-softening heat-radiation sheet including a polyolefin-based heat-conductive composition which comprises a polyolefin and a heat-conductive filler, has a softening point of 40° C. or above, has a thermal conductivity of 1.0 W/mK or higher, has a viscosity at 80° C. of from 1×102 to 1×105 Pa·s and has a plasticity at 25° C. in the range of from 100 to 700. This heat-radiation sheet which is in the form of a solid sheet at room temperature, can readily be attached to or detached from electronic components and a heat sink, is capable of softening by the heat generated during operation of electronic components, to have the interfacial contact thermal resistance at a negligible level, and has a superior heat-radiation performance.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: May 24, 2005
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Kazuhiko Tomaru, Tsutomu Yoneyama, Ryuichi Handa
  • Patent number: 6890971
    Abstract: A method for making a radiation absorbing material (RAM) coating may include providing an iron-silicon alloy powder, forming the iron-silicon alloy powder into flakes, and passivating the flakes. The method may further include selecting passivated flakes having a desired size, and combining the selected passivated flakes with a carrier to provide the RAM coating. The coating may be applied to a substrate to impart the radiation absorbing property thereto.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: May 10, 2005
    Assignee: Steward Advanced Materials, Inc.
    Inventors: Henry G. Paris, Danny R. Smith, Scott F. Smith
  • Patent number: 6881239
    Abstract: An ultrafine metal powder slurry with high dispersibility includes an organic solvent; a surfactant having a hydrophilic group and a lipophilic group; and an ultrafine metal powder in an amount more than 60% by mass and less than 95% by mass. In the slurry, the hydrophilic group of the surfactant is at least one selected from a sulfonato group, sulfo group, sulfonyldioxy group, polyoxyethylene group with carboxyl group, and polyoxyethylene group with phosphate group, and the lipophilic group is an alkyl containing 12 or more carbon atoms or an alkylphenyl. The ultrafine metal powder slurry includes no aggregated particles, exhibits good dispersibility and is useful as a metal material for conductive pastes. The slurry can save a part of process steps in conventional conductive paste production processes, can shorten a process time and can save in labor.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: April 19, 2005
    Assignee: Kawatetsu Mining Co., Ltd.
    Inventor: Morishige Uchida
  • Patent number: 6855399
    Abstract: A wiring board obtained by filling a copper paste in a via hole formed on a ceramic green sheet and firing it to form an insulating layer and a via conductor, the copper paste comprising a copper powder, an organic vehicle and at least one selected from the group consisting of: a ceramic particle having an average particle size of 100 nm or less; and an Fe2O3 particle, wherein the copper paste comprises from 6 to 20 parts by mass of the organic vehicle per 100 parts by mass of the copper powder.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: February 15, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Hiroshi Sumi, Hidetoshi Mizutani, Manabu Sato
  • Patent number: 6841495
    Abstract: A glass containing no lead and comprising, calculated as oxides: 40-60 wt. % ZnO, 15-35 wt. % B2O3, 1-16 wt. % SiO2, 1-10 wt. % Al2O3, 2-15 wt. % MnO2, and at least one selected from the group consisting of Li2O, Na2O and K2O in their total of 0.5-10 wt. %, and a glass with the above-described components where a total of at least one selected from the group consisting of Li2O, Na2O and K2O is 0-5 wt. %, and at least one selected from the group consisting of MgO, CaO, TiO2, Cr2O3, ZrO2, Ta2O5, SnO2, and Fe2O3 is further included in their total of 0.1-5 wt. %. A conductive paste using such a glass as an inorganic binder has a superior binder removal ability and a good sinterability and can form dense conductors with excellent characteristics with respect to resistance to plating solutions, adhesive strength, resistance to thermal shocks, etc.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: January 11, 2005
    Assignee: Shoei Chemical Inc.
    Inventors: Tetsuya Tanaka, Nobuko Morinaga, Yuko Koyama, Yoshiko Morinaga, Mikio Yamazoe, Megumi Kawahara, Kenji Morinaga
  • Patent number: 6838022
    Abstract: An anisotropic conductive compound includes an electrically conducting material suspended in a binder. The electrically conducting material includes nickel coated particles having a coating of silver or gold over the nickel coat and/or gold or silver coated nickel particles. In one embodiment, the binder is formed from the reaction product of a catalyst and a compound comprising an aromatic epoxy resin, a dimer fatty acid diglycidyl ester and oxirane. In another embodiment, the binder is formed from the reaction product of a novalac resin, a catalyst and either a heat polymerized aromatic epoxy resin or a phenoxy modified epoxy novalac resin.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: January 4, 2005
    Assignee: Nexaura Systems, LLC
    Inventor: S. Kumar Khanna
  • Patent number: 6824603
    Abstract: A composition of matter comprising a mixture of an oxide powder or powders and a Reactive Organic Medium (ROM) which can be used to create electronic components on a suitable. The materials are applied to conventional polymer-based circuit substrates by any convenient printing process and thermally cured to well-consolidated oxide components at a temperature, which the substrate can withstand. Mixtures for various components, including resistors, capacitor dielectrics and magnetic cores and processes to apply them are disclosed.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: November 30, 2004
    Assignee: Parelec, Inc.
    Inventor: Paul H. Kydd
  • Patent number: 6818155
    Abstract: Coupling components to an underlying substrate using a composition of a polymer and magnetic material particles. Upon applying the composition between the component and the printed circuit board, the composition may be subjected to a magnetic field to align the magnetic material particles into a conductive path between the component and the underlying substrate. At the same time the polymer-based material may be cured or otherwise solidified to affix the conductive path formed by the magnetic material particles.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: November 16, 2004
    Assignee: Intel Corporation
    Inventors: George Hsieh, Terrance J. Dishongh, Norman J. Armendariz, David V. Spaulding
  • Patent number: 6815045
    Abstract: Provided is a method for manufacturing a metal powder by providing a reducing solution by dispersing caustic alkali, and hydrazine and/or hydrazine hydrate into a solvent; providing a metal salt solution comprising a salt of electroconductive metal, a rare earth metal salt and a solvent; and mixing the reducing solution with the metal salt solution to form a metal powder by depositing a hydroxide derived from the rare earth metal salt and by reducing the salt of electroconductive metal. With this metal powder manufacturing method, the sintering of the metal powder is restricted at a low temperature, the sintering initiation temperature is shifted to a higher level, and rapid sintering shrinkage is restricted, while ceramic grain growth is not accelerated.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: November 9, 2004
    Assignee: Murata Manufacturing Co. Ltd
    Inventors: Tadasu Hosokura, Atsuyoshi Maeda
  • Patent number: 6811917
    Abstract: A conductive, moldable composite material for the manufacture of electrochemical cell components comprising a thermosetting resin system and conductive filler wherein the thermosetting resin composition comprises: (1) a polybutadiene or polyisoprene resin; (2) an optional functionalized liquid polybutadiene or polyisoprene resin; (3) an optional butadiene- or isoprene-containing copolymer; and (4) an optional low molecular weight polymer. In a preferred embodiment, the conductive moldable composite material is used to form a bipolar plate, current collector or other electrochemical cell component. Articles made of the conductive moldable composite material are resistant to chemical attack and hydrolysis, have excellent mechanical strength and toughness, have a volume resistivity of about 0.116 ohm-cm or less and preferably about 0.04 ohm-cm or less and a thermal conductivity of at least about 5 watts/meter ° K.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: November 2, 2004
    Assignee: World Properties, Inc.
    Inventors: Bruce B. Fitts, Vincent R. Landi, Saroj Kumar Roy
  • Patent number: 6808654
    Abstract: The present invention discloses a double-layer structured low-resistance and low-reflectivity transparent conductive film, comprising a lower high-reflectivity conductive layer containing a fine metal powder in a silica-based matrix and a silica-based low-reflectivity layer, suitable for imparting electromagnetic shielding property and anti-dazzling property to a CRT.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: October 26, 2004
    Assignee: Mitsubishi Materials Corporation
    Inventors: Toshiharu Hayashi, Tomoko Oka, Akira Nishihara
  • Patent number: 6780898
    Abstract: An adhesive composition is obtained which has high reactivity and is able to connect even plastic substrates with high connection reliability. The adhesive composition is constituted of insulating resin, photopolymerization initiator, and oxetan compound.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: August 24, 2004
    Assignee: Sony Chemicals Corporation
    Inventor: Hiroyuki Kumakura
  • Patent number: 6765806
    Abstract: The present invention is directed to a composition with electromagnetic compatibility (EMC) characteristics. In an aspect of the present invention, an adhesive suitable to provide a bond between components may include an adhering material suitable for holding a first surface and a second surface in contact. A plurality of items is disposed in the adhering material. The plurality of items has electromagnetic capability shielding characteristics.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: July 20, 2004
    Assignee: LSI Logic Corporation
    Inventor: Barry Caldwell
  • Patent number: 6758991
    Abstract: Ceramic inert anodes useful for the electrolytic production of aluminum are disclosed. The inert anodes comprise an oxide of Ni and Fe having a controlled Ni/(Ni+Fe) mole ratio which results in a single-phase structure at the operation temperatures of aluminum production cells. The Ni and Fe oxide material may also have a single-phase structure at the sintering temperature of the material. The single-phase inert anode materials maintain sufficient electrical conductivity at the operating temperatures of the cell, and also possess good mechanical stability.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: July 6, 2004
    Assignee: Alcoa Inc.
    Inventors: Robert A. DiMilia, Joseph M. Dynys, Douglas A. Weirauch, Jr., Siba P. Ray, Xinghua Liu, Frankie E. Phelps
  • Patent number: 6752937
    Abstract: The invention provides a resin matrix with high loadings of a conductive filler; various additional additives, such as initiators, mold-release agents, shrink control additives, and carbon black; and optionally one or more rheological agents selected from the group comprising group II oxides, alkaline earth oxides, carbodiamides, polyisocynates, polyethylene and polytetraethylene fluoroethylene. The conductive filler is an inorganic filler which is desirably particulate graphite having a significant distribution of large particles such as for example, 95% in the range of about 150 to about 1000 microns with over about 40%, and more particularly about 50% or even 60% over 200 microns, or over 300 microns, or even over 600 microns. Conductive polymers may be used as a conductivity enhancer with the graphite. In addition, silver coated ceramic fibers can be added to improve the overall electrical properties. Fuel cell plates can be made from these compositions.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: June 22, 2004
    Assignee: Quantum Composites, Inc.
    Inventor: Kurt I. Butler
  • Patent number: 6749775
    Abstract: A conductive composition for filling a via. The composition is based on total composition and has 4.0-12.0 wt. % organic vehicle and 88.0-96.0 wt. % electrically conductive particles selected from the group consisting of silver and nickel and mixtures thereof.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: June 15, 2004
    Assignee: CTS Corporation
    Inventor: Terry R. Bloom
  • Patent number: 6746628
    Abstract: An aqueous nickel slurry of the present invention comprises water, nickel fine powder provided thereon with an insoluble inorganic oxide adhered to the surface of the individual nickel fine particles constituting the fine powder, polyacrylic acid or an ester or salt thereof and at least one member selected from the group consisting of ammonium hydroxides substituted with organic substituents and hydroxyl group-containing amine compounds. The aqueous nickel slurry comprises nickel fine powder stably dispersed in the slurry in a high concentration without causing any re-agglomeration and can be used as a conductive paste for firing, in particular, a conductive paste for use in making a multilayer ceramic capacitor. The aqueous nickel slurry comprising nickel fine powder stably dispersed in the slurry in a high concentration without causing any re-agglomeration is prepared by the method of the present invention.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: June 8, 2004
    Assignee: Mitsui Mining and Smelting Co., Ltd.
    Inventors: Yoichi Kamikoriyama, Sumikazu Ogata
  • Patent number: 6716372
    Abstract: The invention provides novel lithium-mixed metal materials which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-mixed metal materials. Methods for making the novel lithium-mixed metal materials and methods for using such lithium-mixed metal materials in electrochemical cells are also provided. The lithium-mixed metal materials comprise lithium and at least one other metal besides lithium. Preferred materials are lithium-mixed metal phosphates which contain lithium and two other metals besides lithium.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: April 6, 2004
    Assignee: Valence Technology, Inc.
    Inventors: Jeremy Barker, M. Yazid Saidi, Jeffrey Swoyer
  • Patent number: 6709745
    Abstract: A method for effectively decreasing electromagnetic radiation by means of active absorbing material in a broad frequency band, preferably from 100 MHz-10 GHz, is provided wherein the material combines the desired shielding properties with the heat insulating properties of a porous material in addition to providing a favourable ratio between density and resistance. The method includes use of an absorber granulate which consists of a highly porous glass and/or ceramic granulate which is coated or filled with ferrite and/or an electrically conductive material.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: March 23, 2004
    Assignees: Hermsdorfer Institut Fuer Technische Karamik E.V., Colfirmit Rajasil GmbH & Co. KG
    Inventors: Josef Kuchler, Jan-Thomas Kuehnert, Klaus Kupfer, Stefan Rossmayer, Wolfgang Schoeps, Hans-Werner Zier
  • Patent number: 6702961
    Abstract: The invention provides novel lithium-mixed metal materials which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-mixed metal materials. Methods for making the novel lithium-mixed metal materials and methods for using such lithium-mixed metal materials in electrochemical cells are also provided. The lithium-mixed metal materials comprise lithium and at least one other metal besides lithium. Preferred materials are lithium-mixed metal phosphates which contain lithium and two other metals besides lithium.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: March 9, 2004
    Assignee: Valence Technology, Inc.
    Inventors: Jeremy Barker, M. Yazid Saidi, Jeffrey Swoyer
  • Patent number: 6695985
    Abstract: An electromagnetic wave suppressor sheet formed into a sheet-like shape out of a material made of synthetic resin in which powder of conjugated magnetic particles surface-treated with an insulating inorganic material has been dispersed.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: February 24, 2004
    Assignees: Nitto Denko Corporation, Sony Corporation
    Inventors: Kazumasa Igarashi, Junichi Toyoda, Katsumi Okayama
  • Patent number: 6693053
    Abstract: A glass or glass powder is fused from a starting mixture containing approximately 38 wt % to 48 wt % SO2, 15 wt % to 19 wt % Al2O3, 4.5 wt % to 11 wt % TiO2, 0 wt % to 1.5 wt % Na2O, 0 wt % to 1.5 wt % K2O and 23 wt % to 30 wt % CaO. In addition, a glass powder mixture includes two glass powders, a carbon black powder and an organic binder, the first glass powder having a mean particle size of approximately 150 &mgr;m to 250 &mgr;m, the second glass powder having a mean particle size of less than approximately 100 &mgr;m, which may be 10 &mgr;m to 70 &mgr;m. The glass or glass powder mixture is suitable for producing a glass ceramic, such as that used as a resistor seal and/or a gas-tight glass ceramic solder in a spark plug.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: February 17, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Heinz Geier, Rudolf Pollner, Ulrich Eisele, Peter Wange
  • Patent number: 6686045
    Abstract: Composite fine particles each having a nickel base core whose surface is coated with an oxide are effective for improving shrinkage upon firing and metal oxidation during binder burnout. The nickel base core has the formula: Ni(1-a-b)ZaZ′b wherein Z is Ag, Au, Co, Cu, Pd or a mixture of any, Z′ is Li, K, Na, B, P or a mixture of any, 0≦a≦0.4, 0≦b≦0.1 (weight proportion), and a+b>0, and the coating oxide is an oxide of Ag, Ba, Co, Cu, Ni, Sn, Ti, Zr, rare earth elements including Y, Pd or a mixture of any.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: February 3, 2004
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yasushi Takai, Iwao Kubota
  • Patent number: 6680008
    Abstract: The invention provides a novel compound of materials, which solves the problem of metal diffusion into glass layers during the formation of electrodes on a glass substrate. The invention provides a compound which comprises a powder of a conducting metal or alloy and a powder of a meltable metal or alloy. The use of a metal compound furthermore makes it possible to eliminate a firing step in the electrode formation process. Depending on various embodiments, the compound may furthermore include an adhesion promoter, in order to bond the electrodes to the substrate, a resin and/or a photosensitive substance. The invention also relates to a process for manufacturing a plasma panel using the said compound, and to a plasma panel obtained by the said process.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: January 20, 2004
    Assignee: Thomson Plasma
    Inventor: Guy Baret
  • Patent number: 6673272
    Abstract: A laminated ceramic electronic component, for example, monolithic ceramic capacitor, in which the delamination does not occur during baking and having superior thermal shock and moisture load resistance characteristics is provided. A conductive paste, used with advantage to form an internal electrode of the laminated ceramic electronic component, and a laminated ceramic electronic component using the conductive paste is provided. The conductive paste is composed of a conductive powder which is primarily Ni, an organic vehicle, a compound A containing at least one of Mg and Ca and which is an organic acid metal salt, oxide powder, metal organic complex salt and/or an alkoxide, and a compound B, having a hydrolyzable reactive group containing at least one of Ti and Zr, which adheres to the surface of the conductive powder.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: January 6, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takaharu Miyazaki, Tsuyoshi Yamana
  • Publication number: 20040002003
    Abstract: A non-aqueous electrolyte secondary battery employing a positive electrode active material containing a compound represented by the general formula LixMyPO4, where 0<x≦2 and 0.8≦y≦1.2, with M containing a 3d transition metal, where LixMyPO4 encompasses that with the grain size not larger than 10 &mgr;m. The non-aqueous electrolyte secondary battery has superior cyclic characteristics and a high capacity.
    Type: Application
    Filed: June 30, 2003
    Publication date: January 1, 2004
    Inventors: Atsuo Yamada, Guohua Li, Hideto Azuma
  • Patent number: 6663799
    Abstract: Disclosed are provides conductive metal particles and conductive composite metal particles by which conductive materials having stable conductivity can be provided, and applied product thereof. The conductive metal particles have a number average particle diameter of 5 to 100 &mgr;m, a BET specific surface area of 0.01×103 to 0.7×103 m2/kg, a sulfur element content of at most 0.1% by mass, an oxygen element content of at most 0.5% by mass and a carbon element content of at most 0.1% by mass. The conductive composite metal particles are obtained by coating the surfaces of the conductive metal particles with a high-conductive metal.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: December 16, 2003
    Assignee: JSR Corporation
    Inventors: Terukazu Kokubo, Naoki Yanadori
  • Patent number: 6656389
    Abstract: A thermal paste for low temperature applications made from a combination of a thermally conducting solid filler, dispersant and linear alkylbenzene carrier. The thermal paste may be applied to an electronic component to increase the cooling of the electronic component.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: December 2, 2003
    Assignee: International Business Machines Corporation
    Inventors: Sushumna Iruvanti, Edward Louis Yankowski, Jr.
  • Patent number: 6652956
    Abstract: A method and structure to form a conductive pattern on a ceramic sheet deposits a photosensitive conductive material on a carrier and exposes a pattern of x-ray energy on the material and sinters the carrier and the material to the ceramic sheet so that only the conductive pattern of the material remains on the ceramic sheet. The structure has a conductive patterned material which includes a photosensitive agent.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: November 25, 2003
    Assignee: International Business Machines Corporation
    Inventors: Lawrence A. Clevenger, David B. Goland, Louis L. Hsu, Joseph F. Shepard, Jr., Subhash L. Shinde
  • Patent number: 6645613
    Abstract: The present invention is directed to a coating composition comprising a pigment, a water-dispersible urethane resin, and a solvent effective amount of a water-soluble solvent. The water-dispersible urethane resin exists as a colloidal dispersion in water but when mixed with a water-soluble solvent swells to provide a dispersion having a viscosity sufficiently high in the solvent so as to maintain the pigment in suspension in the solvent for a time sufficient to apply the coating composition. The present invention is also directed to a method for coating a substrate with the novel coating composition and to a coated substrate prepared by the novel method.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: November 11, 2003
    Assignee: Spraylat Corporation
    Inventor: Anthony R. Ricca
  • Patent number: 6645629
    Abstract: There are disclosed a conductive antioxidant paint suitably used as an antioxidant material for a graphite electrode used in arc furnaces such as electric steel-making furnaces, and a graphite electrode coated with the conductive antioxidant paint.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: November 11, 2003
    Assignee: Mikuni Color, Ltd.
    Inventors: Hideyuki Hisashi, Issei Kawabata, Tatsuo Fukushima
  • Patent number: 6632524
    Abstract: Nickel powder comprises, on the basis of the total number of particles, not less than 10% of particles whose particle size is not less than 1.2 time the average particle size, as determined by the SEM observation; and not less than 10% of particles whose particle size is not more than 0.8 time the average particle size, as determined by the SEM observation. The nickel powder can be prepared by, for instance, precipitating nickel particles from an aqueous solution containing a nickel salt and a hydrazine reducing agent, without forming any hydroxide of nickel as an intermediate. A conductive paste containing the nickel powder can be applied onto the positions on which an internal or external electrode for electronic parts and then baking the coated paste to give an electrode.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: October 14, 2003
    Assignee: Mitsui Mining and Smelting Co., Ltd.
    Inventors: Yoshiharu Toshima, Takao Hayashi, Yasuhide Yamaguchi, Hiroyuki Shimamura
  • Patent number: 6627120
    Abstract: In order to achieve miniaturization and an increase in the capacitance of a monolithic ceramic capacitor, a conductive paste suitable for forming an internal conductor film is provided, the layer thickness of the internal conductor film being decreased with a decrease in the layer thickness of a dielectric ceramic layer. The conductive paste contains a conductive powder, such as a nickel powder, an organic vehicle, an organic acid barium salt and an organic zirconium compound. Each of the organic acid barium salt in terms of barium atom and the organic zirconium compound in terms of zirconium atom is about 0.05 to 1.00 mol per mol of the conductive powder, and the content of the organic zirconium compound in terms of zirconium atom is about 0.98 to 1.02 mol per mol of the organic acid barium salt in terms of barium atom.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: September 30, 2003
    Assignee: Murata Manufacturing Co. Ltd.
    Inventor: Motohiro Shimizu
  • Patent number: 6627117
    Abstract: A coating system for ferrous and nonferrous metal substrates that provides cathodic protection from corrosion by coating with inherently conductive polymers and sacrificial anodic metal particles. The coating system is formed by a process that includes premixing of the inherently conductive polymer with the anodic metal particles to form a inherently conductive polymer/metal particle complex.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: September 30, 2003
    Assignee: GeoTech Chemical Company, LLC
    Inventors: Steven K. Geer, Todd R. Hawkins
  • Patent number: 6627118
    Abstract: A crystalline Ni alloy particle for an anisotropic conductive film comprising Ni and a metalloid element such as P, B, etc. and having a structure in which a Ni intermetallic compound phase is precipitated can be produced by preparing substantially amorphous Ni alloy particle by an electroless reduction method, and heat-treating the substantially amorphous Ni alloy particle. The Ni alloy particle is preferably heat-treated after disintegration, and preferably coated with Au.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: September 30, 2003
    Assignee: Hitachi Metals, Ltd.
    Inventors: Kagehiro Kageyama, Koji Sato
  • Patent number: 6620219
    Abstract: A method for producing metal powder which involves the step of making an alkaline hydroxide, hydrazine or a hydrazine hydrate, and a metallic salt co-exist in a solvent comprising an alcohol, at least a portion of each being dissolved; wherein, in the step, metal powder comprising a metal contained in the metallic salt is precipitated by reducing the metallic salt with the hydrazine or the hydrazine hydrate. By the above method, a metal powder having a particle size of about 100 nm or less can be obtained and the metal powder is not contaminated with impurities originating from the reducing agent.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: September 16, 2003
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Tadasu Hosokura
  • Patent number: 6613123
    Abstract: Variable melting point solders and brazes having compositions comprising a metal or metal alloy powder having a low melting point with a metal powder having a higher melting point. Upon heating, in-situ alloying occurs between the low and high melting point powders such that solidification occurs at the solder or braze temperature thus creating a new, higher solidus (or melting) temperature with little or no intermetallic formation. A solder comprising Sn powder mixed with a Sn—Bi eutectic powder having a composition of 63 wt % Sn:57 wt % Bi such that the bulk composition of the mixture is 3 wt % Bi has an initial melting point of 140° C. and a re-melt temperature of 220° C. after heating due to in-situ alloying. A composition of Pb powder mixed with a Pb—Sn eutectic powder having a composition of 62 wt % Sn:58 wt % Pb such that the bulk composition of the mixture is 15 wt % Sn has an initial melting point of 183° C. and a re-melt temperature of 250° C.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: September 2, 2003
    Inventors: Stephen F. Corbin, Douglas J. McIsaac, Xin Qiao
  • Patent number: 6607679
    Abstract: In an organic PTC thermistor comprising a matrix of at least two high-molecular weight compounds, a low-molecular weight organic compound, and conductive particles having spiky protuberances, a thermoplastic elastomer is contained in the matrix whereby the thermistor is improved in reliability and performance stability.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: August 19, 2003
    Assignee: TDK Corporation
    Inventors: Tokuhiko Handa, Yukie Yoshinari
  • Patent number: 6602438
    Abstract: A structure for polymeric thermistor device and method of making the same are disclosed. The polymeric thermistor makes use of a polymeric composite filled with conductive filler and show resistance variations at different temperatures. A polymeric substrate filled with conductive filler is cross-linked so that the whole polymeric composite structure filled with conductive filler is able to memorize shape. Then, the cross-linked polymeric composite undergoes a simple-sheared process and turns into a polymeric composite with a strain more than 1%. Therefore, the micro-structure and electrical properties of the conductive filler are changed.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: August 5, 2003
    Assignee: Protectronics Technology Corporation
    Inventor: Chen-Ron Lin
  • Patent number: 6599444
    Abstract: Luminescent polymers are prepared from thermosetting unsaturated polyesters, suspending fillers and phosphorescent pigments and utilized to make gel coated articles and molded, cast and fiberglass reinforced plastic (FRP) articles. The luminescent polymers show bright and long-lasting photoluminescent afterglow, strong thermostimulation of afterglow by heat and electroluminescent properties. The preferred thermosetting unsaturated polyester resins are prepared by condensing mixtures of ethylenically unsaturated and aromatic dicarboxylic acids and anhydrides with dihydric alcohols and a polymerizable vinylidene monomer. Preferred suspending fillers and thixotropic modifiers include silica, microspheres, glass fibers and other short fibers, nepheline syenite, feldspar, mica, pumice, magnesium sulfate, calcium carbonate, bentonite and the various clays and thixotropic modifiers and mixtures thereof.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: July 29, 2003
    Assignee: Orion 21 A.D. Pty. Ltd.
    Inventor: Peter Burnell-Jones
  • Patent number: 6592783
    Abstract: An anisotropic conductive adhesive film contains a first insulating adhesive layer, a second insulating adhesive layer whose modulus of elasticity after curing is less than the modulus of elasticity of the cured first insulating adhesive layer, and electrically conductive particles which are dispersed in at least either the first insulating adhesive layer or the second insulating adhesive layer.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: July 15, 2003
    Assignee: Sony Chemicals Corp.
    Inventors: Hiroyuki Kumakura, Satoshi Yamamoto
  • Patent number: 6592782
    Abstract: Metal oxides particularly useful for the manufacture of catalytic membranes for gas-phase oxygen separation processes having the formula: AxA′x′A″2-(x+x′)ByFey′B″2-(y+y′)O5+z where: x and x′ are greater than 0; y and y′ are greater than 0; x+x′ is equal to 2; y+y′ is less than or equal to 2; z is a number that makes the metal oxide charge neutral; A is an element selected from the lanthanide elements; A′ is an element selected from Be, Mg, Ca, Sr, Ba and Ra; A″ is an element selected from the f block lanthanides, Be, Mg, Ca, Sr, Ba and Ra; B is an element selected from the group consisting of Al, Ga, In or mixtures thereof and B″ is Co or Mg, with the exception that when B″ is Mg, A′ and A″ are not Mg. The metal oxides are useful for preparation of dense membranes which may be formed from dense thin films of the mixed metal oxide on a porous metal oxide element.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: July 15, 2003
    Assignee: Eltron Research, Inc.
    Inventors: Richard MacKay, Michael Schwartz, Anthony F. Sammells
  • Patent number: 6583201
    Abstract: An composition with improved electrical stability for use in microelectronic applications comprises a polymeric resin, a conductive filler, a curing agent, optionally either a reactive or a nonreactive diluent and a corrosion inhibitor to provide the electrical stability.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: June 24, 2003
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Chih-Min Cheng, Gerry Fredrickson, Girish Hanchinamani
  • Publication number: 20030111648
    Abstract: The present invention discloses a conductive composition, comprising: (a) at least one polymer; (b) at least one conductive filler, dispersed in the polymer; and (c) a coupling agent, applied to improved the adhesion between the polymer and the conductive filler and having a structure as follows: 1
    Type: Application
    Filed: February 25, 2002
    Publication date: June 19, 2003
    Inventors: Edward Fu-Hua Chu, David Shau-Chew Wang, Yun-Ching Ma
  • Patent number: 6579474
    Abstract: A conductive composition, and articles and methods using the conductive composition are disclosed.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: June 17, 2003
    Assignee: Fujitsu Limited
    Inventors: Mark Thomas McCormack, Hunt Hang Jiang, Solomon I. Beilin, Albert Wong Chan, Yasuhito Takahashi
  • Patent number: 6577494
    Abstract: A conductive paste which can form conductive films having superior stability due to prevention of change in viscosity with time, and having high reliability due to reduction of gas generation during a defatting is provided. The conductive paste is composed of a conductive powder having an average particle diameter of about 1.0 &mgr;m or less, an organic vehicle, an anionic macromolecular dispersing agent, and an amine having a boiling point of about 120° C. or more, but about 220° C. or less and constitutes about 0.1% to 5% by weight of 100% by weight of the conductive paste.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: June 10, 2003
    Assignee: Murata Manufacturing Co. Ltd.
    Inventors: Shinya Watanabe, Atsuyoshi Maeda
  • Patent number: 6569358
    Abstract: The method of preparing the porous material incorporating ultrafine metal particles comprises the following steps: (1) preparing surface-protected ultrafine metal particles by reducing metal ions in the presence of molecules such as dodecanethiol molecules; (2) immersing a wet gel in a solution of the ultrafine metal particles, thus forming an ultrafine metal particle/wet gel composite in which the ultrafine metal particles are incorporated in the wet gel; and (3) drying the ultrafine metal particle/wet gel composite to form a porous body.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: May 27, 2003
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Yutaka Tai, Koji Tajiri, Masao Watanabe, Sakae Tanemura