Patents by Inventor Takahiko Kato

Takahiko Kato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120260988
    Abstract: A paste composition for an electrode, the paste composition comprising: phosphorous-containing copper alloy particles in which the content of phosphorous is from 6% by mass to 8% by mass; glass particles; a solvent; and a resin.
    Type: Application
    Filed: April 5, 2012
    Publication date: October 18, 2012
    Inventors: Shuichiro Adachi, Masato Yoshida, Takeshi Nojiri, Mitsunori Iwamuro, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Publication number: 20120260982
    Abstract: The present invention provides a paste composition for an electrode, the paste composition comprising phosphorus-containing copper alloy particles, tin-containing particles, glass particles, a solvent and a resin. The present invention also provides a photovoltaic cell element having an electrode formed from the paste composition, and a photovoltaic cell.
    Type: Application
    Filed: April 11, 2012
    Publication date: October 18, 2012
    Inventors: Shuichiro ADACHI, Masato Yoshida, Takeshi Nojiri, Mitsunori Iwamuro, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Patent number: 8217274
    Abstract: A wiring member comprising a substrate, a copper wiring layer having an electrical resistivity of not larger than 4×10?6 ?cm in directly or indirectly contact with the substrate, an aluminum diffusion layer, contiguous to the copper wiring layer, having an aluminum concentration gradient descending towards the inside, and an aluminum oxide layer contiguous to and covering the aluminum diffusion layer, wherein a ratio of a thickness of the copper wiring layer to a thickness of the aluminum diffusion layer is 1.5 to 5. The disclosure is also concerned with a method of manufacturing the wiring member and an electronic device.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: July 10, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Hiroki Yamamoto, Takashi Naito, Takuya Aoyagi, Yuuichi Sawai, Takahiko Kato
  • Publication number: 20120125670
    Abstract: In an electronic component having a wiring and/or an electrode prepared through firing of a paste or in an electronic component having a wiring in contact with a glass or glass ceramic member, provided is an electronic component using a Cu-based wiring material which less suffers from increase in electric resistance due to oxidation, which less causes bubbles in the glass or glass ceramic, and has satisfactory migration resistance. The Cu—Al alloy powder includes a Cu—Al alloy powder including Cu and, preferably, 50 percent by weight or less of Al; and an aluminum oxide film having a thickness of 80 nm or less and being present on the surface of the Cu—Al alloy powder. The powder, when compounded with a glass or glass ceramic material to give a paste, can be used to form wiring (interconnections), electrodes, and/or contact members.
    Type: Application
    Filed: August 2, 2010
    Publication date: May 24, 2012
    Inventors: Takahiko Kato, Takashi Naito, Takuya Aoyagi, Hiroki Yamamoto, Masato Yoshida, Mitsuo Katayose, Shinji Takeda, Naotaka Tanaka, Shuichiro Adachi
  • Patent number: 8179041
    Abstract: A plasma display panel (PDP) includes a first plate, and a second plate disposed to face the first plate via a discharge space and providing barrier ribs. A plurality of first electrodes and a plurality of second electrodes extending in a first direction, and a dielectric layer covering the first electrodes and the second electrodes are provided on the first plate. A plurality of address electrodes extending in a second direction, and a protective layer covering the dielectric layer and the address electrodes and exposing at least a part of the protective layer to the discharge space are provided on the dielectric layer. The address electrodes are made up by including a conductive layer formed by either one of aluminum and an alloy containing aluminum and copper and by not including a layer of a simple substance of copper.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: May 15, 2012
    Assignees: Hitachi, Ltd., Hitachi Plasma Display Limited
    Inventors: Hideaki Yanagita, Masahiro Watabe, Takahiko Kato, Takashi Naito
  • Publication number: 20120103412
    Abstract: Provided is a method for manufacturing a two-dimensional pattern by simultaneously forming a plurality of quantum dots on a surface of a solid material and making the quantum dots a periodic structure by a laser irradiation, and a device structure and a device fabricated by the method. The method for fabricating a quantum dot-formed surface including the laser irradiation which irradiate at least one batch of laser onto a surface of a solid material to simultaneously form a plurality of quantum dots on the surface, arranging the plurality of quantum dots into periodic arrays.
    Type: Application
    Filed: May 25, 2010
    Publication date: May 3, 2012
    Inventors: Takahiko Kato, Seiichi Watanabe, Shigeo Yatsu, Satoshi Kayashima, Norihiko Nishiguchi, Hiroaki Misawa, Kiyotaka Asakura
  • Publication number: 20120012992
    Abstract: A semiconductor device having an improved whisker resistance in an exterior plating film is disclosed. The semiconductor device includes a tab with a semiconductor chip fixed thereto, plural inner leads, plural outer leads formed integrally with the inner leads, a plurality of wires for coupling electrode pads of the semiconductor chip and the inner leads with each other, and a sealing body for sealing the semiconductor chip. The outer leads project from the sealing body and an exterior plating film, which is a lead-free plating film, is formed on a surface of each of the outer leads.
    Type: Application
    Filed: July 13, 2011
    Publication date: January 19, 2012
    Inventors: Tomohiro MURAKAMI, Takahiko KATO, Masato NAKAMURA, Takeshi TERASAKI
  • Publication number: 20110315937
    Abstract: Provided is a conductive paste which contains an inexpensive metal, such as copper or aluminum, as an electrode wiring material and has oxidation resistance that enables the paste to withstand a high-temperature process performed in an oxidizing atmosphere and an electronic part equipped with electrode wiring formed from the paste. The electronic part in accordance with the present invention is equipped with electrode wiring that comprises a conductive glass phase containing transition metals and phosphorus, metal particles, and none of the substances prohibited by the RoHS directive. The electronic part is characterized in that each of the transition metals contained in the conductive glass phase is present in the state of having a plurality of oxidation numbers and that the proportion of the atoms which have the largest oxidation number for each transition metal satisfies a given relationship.
    Type: Application
    Filed: March 27, 2009
    Publication date: December 29, 2011
    Applicant: HITACHI, LTD.
    Inventors: Takuya Aoyagi, Takashi Naito, Hiroki Yamamoto, Takahiko Kato
  • Publication number: 20110277831
    Abstract: The paste composition for an electrode are constituted with copper-containing particles having a peak temperature of an exothermic peak showing a maximum area in the simultaneous ThermoGravimetry/Differential Thermal Analysis of 280° C. or higher, glass particles, a solvent, and a resin. Further, the photovoltaic cell has an electrode formed by using the paste composition for a photovoltaic cell electrode.
    Type: Application
    Filed: January 25, 2011
    Publication date: November 17, 2011
    Inventors: Masato YOSHIDA, Takeshi Nojiri, Mitsunori Iwamuro, Shuuichirou Adachi, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Publication number: 20110209751
    Abstract: The paste composition for an electrode according to the present invention includes metal particles containing copper as a main component, a flux, glass particles, a solvent, and a resin. Further, a photovoltaic cell according to the present invention has an electrode formed by using the paste composition for an electrode.
    Type: Application
    Filed: January 25, 2011
    Publication date: September 1, 2011
    Inventors: Takeshi Nojiri, Masato Yoshida, Mitsunori Iwamuro, Shuuichirou Adachi, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Publication number: 20110180139
    Abstract: The paste composition for an electrode of the first aspect of the present invention includes silver alloy particles, glass particles, a resin, and a solvent. The paste composition for an electrode of the second aspect of the present invention includes copper particles, silver or silver alloy particles, glass particles containing P2O5 and V2O5, a resin, and a solvent, in which the content of the copper particles to the silver or silver alloy particles is from 9% by mass to 88% by mass. Further, the cell of a photovoltaic cell of the present invention has an electrode formed by using the paste composition for an electrode.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 28, 2011
    Inventors: SHUUICHIROU ADACHI, Masato Yoshida, Takeshi Nojiri, Mitsunori Iwamuro, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Publication number: 20110180137
    Abstract: The paste composition for an electrode are constituted with metal particles having copper as a main component, a phosphorous-containing compound, glass particles, a solvent, and a resin. Further, the photovoltaic cell has an electrode formed by using the paste composition for an electrode.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 28, 2011
    Inventors: Mitsunori Iwamuro, Masato Yoshida, Takeshi Nojiri, Shuuichirou Adachi, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Publication number: 20110180138
    Abstract: The paste composition for an electrode includes metal particles having copper as a main component, glass particles including diphosphorus pentoxide and divanadium pentoxide and having a content of divanadium pentoxide of 1% by mass or more, a solvent, and a resin. Further, the photovoltaic cell has an electrode formed by using the paste composition for an electrode.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 28, 2011
    Inventors: Shuuichirou Adachi, Masato Yoshida, Takeshi Nojiri, Mitsunori Iwamuro, Keiko Kizawa, Takuya Aoyagi, Hiroki Yamamoto, Takashi Naito, Takahiko Kato
  • Patent number: 7946829
    Abstract: A jet pump is disclosed through which a liquid flows. The jet pump includes a jet nozzle including an injection port for injecting the liquid. The jet pump also includes a throat pipe including a throat passage that extends linearly. The throat pipe includes a downstream side with an open part, and the liquid injected from the injection port flows into the throat passage. The liquid in the throat passage forms a liquid seal across a cross section of the throat passage to generate negative pressure, which introduces the liquid into the throat passage.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: May 24, 2011
    Assignees: Denso Corporation, Nippon Soken Inc.
    Inventors: Kiyokazu Akiyama, Moriyasu Goto, Takahiko Kato
  • Publication number: 20110062865
    Abstract: A plasma display panel (PDP) includes a first plate, and a second plate disposed to face the first plate via a discharge space and providing barrier ribs. A plurality of first electrodes and a plurality of second electrodes extending in a first direction, and a dielectric layer covering the first electrodes and the second electrodes are provided on the first plate. A plurality of address electrodes extending in a second direction, and a protective layer covering the dielectric layer and the address electrodes and exposing at least a part of the protective layer to the discharge space are provided on the dielectric layer. The address electrodes are made up by including a conductive layer formed by either one of aluminum and an alloy containing aluminum and copper and by not including a layer of a simple substance of copper.
    Type: Application
    Filed: September 4, 2008
    Publication date: March 17, 2011
    Applicants: HITACHI, LTD., HITACHI PLASMA DISPLAY LIMITED
    Inventors: Hideaki Yanagita, Masahiro Watabe, Takahiko Kato, Takashi Naito
  • Publication number: 20100307802
    Abstract: A wiring member comprising a substrate, a copper wiring layer having an electrical resistivity of not larger than 4×10?6 ?cm in directly or indirectly contact with the substrate, an aluminum diffusion layer, contiguous to the copper wiring layer, having an aluminum concentration gradient descending towards the inside, and an aluminum oxide layer contiguous to and covering the aluminum diffusion layer, wherein a ratio of a thickness of the copper wiring layer to a thickness of the aluminum diffusion layer is 1.5 to 5. The disclosure is also concerned with a method of manufacturing the wiring member and an electronic device.
    Type: Application
    Filed: June 3, 2010
    Publication date: December 9, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Hiroki YAMAMOTO, Takashi Naito, Takuya Aoyagi, Yuuichi Sawai, Takahiko Kato
  • Publication number: 20100151323
    Abstract: The objects of the present invention are to provide a copper-base electrode which can be calcined in an oxidative atmosphere, e.g., in air, like a silver electrode, and is less expensive than a silver electrode; an electrode paste; and electronic parts using it. The other objects of the present invention are to provide a copper-base electrode which can be calcined in an inert gas atmosphere, e.g., in nitrogen, at low temperature; an electrode paste; and electronic parts using it. The electrode of the present invention contains at least metallic particles and an oxide phase, wherein the metallic particles contain copper and aluminum, and the oxide phase contains phosphorus. The oxide phase is preferably present as a phosphate glass phase in grain boundaries of the metallic particles. The electrode preferably contains the metallic particles and oxide phase at respective 75 to 95% and 5 to 25%, all percentages by volume.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 17, 2010
    Inventors: Takashi Naito, Takahiko Kato, Takuya Aoyagi, Hiroki Yamamoto
  • Publication number: 20090218694
    Abstract: A semiconductor device having Cu wiring including a basic crystal structure which can reduce surface voids, and an inspecting technique for the semiconductor device. In the semiconductor device, surface voids can be reduced down to 1/10 or less of a current practical level by specifying a barrier layer and a seed layer and setting a proportion (frequency) of occupation of a coincidence site lattice (CSL) boundary having a grain boundary Sigma value 27 or less to all crystal grain boundaries of a Cu wiring to 60% or higher. Alternatively, a similar effect of surface void reduction can be obtained by specifying a barrier layer and a seed layer and setting a proportion (frequency) of occupation of a coincidence site lattice (CSL) boundary having a grain boundary Sigma value 3 to all crystal grain boundaries of a Cu wiring to 40% or higher.
    Type: Application
    Filed: February 20, 2009
    Publication date: September 3, 2009
    Inventors: Takahiko KATO, Hiroshi NAKANO, Haruo AKAHOSHI, Yuuji TAKADA, Yoshimi SUDO, Tetsuo FUJIWARA, Itaru KANNO, Tomoryo SHONO, Yukinori HIROSE
  • Publication number: 20090200070
    Abstract: An object of the present invention is to provide an electronic component, including a wiring that contacts a glass or a glass ceramics member, for which a Cu-based wiring material capable of suppressing generation of bubbles in the glass or the glass ceramics member and having excellent migration resistance is used. The present invention provides an electronic component including a wiring that contacts a glass or a glass ceramics member. In the electronic component, the wiring material is formed of a binary alloy made of two elements of Cu and Al, and contains not more than 50.0% by weight of Al and a balance of unavoidable impurities.
    Type: Application
    Filed: February 6, 2009
    Publication date: August 13, 2009
    Inventors: Takahiko KATO, Takashi NAITO, Yuichi SAWAI, Haruo AKAHOSHI, Shinji YAMADA
  • Publication number: 20070189908
    Abstract: A jet pump is disclosed through which a liquid flows. The jet pump includes a jet nozzle including an injection port for injecting the liquid. The jet pump also includes a throat pipe including a throat passage that extends linearly. The throat pipe includes a downstream side with an open part, and the liquid injected from the injection port flows into the throat passage. The liquid in the throat passage forms a liquid seal across a cross section of the throat passage to generate negative pressure, which introduces the liquid into the throat passage.
    Type: Application
    Filed: January 24, 2007
    Publication date: August 16, 2007
    Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Kiyokazu Akiyama, Moriyasu Goto, Takahiko Kato