Patents by Inventor Takuya Aoyagi

Takuya Aoyagi 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: 20150270508
    Abstract: In an electronic component including two substrates at least one of which is transparent, an organic member arranged between these substrates, and a bonding portion located onto respective outer circumferential portions of the two substrates, this bonding portion includes a low-melting glass and filler particles. The low-melting glass includes vanadium oxide. The filler particles include a low thermally-expandable material, and an oxide containing a bivalent transition metal as a constituent element. The oxide is dispersed in the low thermally-expandable material, and the low thermally-expandable material has a thermal expansion coefficient of 5×10?7/° C. or less in a temperature range from 30 to 250° C. This invention makes it possible to heat the filler particles by irradiation with a laser to give the electronic component which is a component having a highly reliable bonding portion.
    Type: Application
    Filed: October 9, 2013
    Publication date: September 24, 2015
    Applicant: Hitachi Chemical Company, Ltd.
    Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Takuya Aoyagi, Masanori Miyagi, Motomune Kodama, Yuichi Sawai, Tadashi Fujieda, Takeshi Tsukamoto, Hajime Murakami
  • Patent number: 9142708
    Abstract: Disclosed is a constitution formed from an oxide of an element having a smaller work function than aluminum. This oxide is comprises an oxide of vanadium (V), an oxide of an alkaline earth metal and an oxide of an alkali metal. The elements for the alkaline earth metal are comprise one or more elements out of the elements calcium (Ca), strontium (Sr) and barium (Ba) and at least contain barium. The elements for the alkali metal include at least one or more of sodium (Na), potassium (K), rubidium (Rb) and cesium (Cs). When the element vanadium is included as vanadium pentoxide (V2O5), the vanadium pentoxide content is 40-70 wt %. Thus, a glass composition for aluminum electrode wiring with an apparent work function for electrode wiring that is smaller than the work function for aluminum (Al) can be provided without the inclusion of lead.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: September 22, 2015
    Assignees: HITACHI, LTD., HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Naito, Takuya Aoyagi, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba
  • Publication number: 20150187510
    Abstract: An electronic component has an organic member between two transparent substrates, in which outer peripheral portions of the two transparent substrates are bonded by a sealing material containing to melting glass. The low melting glass contains vanadium oxide, tellurium oxide, iron oxide and phosphoric acid, and satisfies the following relations (1) and (2) in terms of oxides. The sealing material is formed of a sealing material paste which contains the low melting glass, a resin binder and a solvent, the low melting glass containing vanadium oxide, tellurium oxide, iron oxide and phosphoric acid, and satisfies the following relations (1) and (2) in terms of the oxides. Thereby, thermal damages to an organic element or an organic material contained in the electronic component can be reduced and an electronic component having a glass bonding layer of high reliability can be produced efficiently.
    Type: Application
    Filed: July 25, 2013
    Publication date: July 2, 2015
    Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Motomune Kodama, Masanori Miyagi, Takuya Aoyagi, Yuichi Sawai, Tadashi Fujieda, Takeshi Tsukamoto, Hajime Murakami
  • Patent number: 9048056
    Abstract: A glass composition according to the present invention comprises: transition metals; phosphorus; barium; and zinc, the transition metals including: vanadium; and tungsten and/or iron, the glass composition not containing substances included in the JIG level A and B lists, an softening point of the glass composition being from 430 to 530° C., an average linear expansion coefficient of the glass composition being from 6 to 9 ppm/° C. at temperatures from 30 to 250° C.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: June 2, 2015
    Assignee: HITACHI POWDERED METALS CO., LTD.
    Inventors: Kei Yoshimura, Shinichi Tachizono, Yuji Hashiba, Takashi Naito, Takuya Aoyagi
  • Patent number: 8951436
    Abstract: A lithium ion secondary battery has a high cycle retention rate, and has its battery capacity increased. A positive electrode active material is used which includes a crystal phase having a structure formed by collecting a plurality of crystallites, and powder particles containing amorphous phases and formed between the crystallites. The amorphous phases and contain one or more kinds of metal oxides selected from the group consisting of vanadium oxide, iron oxide, manganese oxide, nickel oxide and cobalt oxide. The crystal phase and the amorphous phase and are capable of intercalation and deintercalation of lithium ions.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: February 10, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Hashiba, Kei Yoshimura, Shinichi Tachizono, Takashi Naito, Takuya Aoyagi, Tadashi Fujieda
  • Patent number: 8945436
    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: Grant
    Filed: March 27, 2009
    Date of Patent: February 3, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Takuya Aoyagi, Takashi Naito, Hiroki Yamamoto, Takahiko Kato
  • Publication number: 20150028333
    Abstract: A metal matrix composite having high corrosion resistance even if the coating film deposit amount is low is obtained. A metal matrix composite includes a metal or alloy substrate coated with a molten transition metal oxide glass, wherein the transition metal oxide glass has an n-type polarity. Further, a method for producing a metal matrix composite includes a step of applying a paste containing a transition metal oxide glass, an organic binder, and an organic solvent onto the surface of a metal or alloy substrate, and a step of forming a glass coating film on the substrate by heating to and maintaining a temperature equal to or higher than the softening point of the transition metal oxide glass after the application step, wherein the transition metal oxide glass has an n-type polarity.
    Type: Application
    Filed: January 15, 2013
    Publication date: January 29, 2015
    Applicant: HITACHI, LTD.
    Inventors: Tadashi Fujieda, Takashi Naito, Takuya Aoyagi, Yuichi Sawai
  • Publication number: 20150020879
    Abstract: To improve the gas barrier property of a laminate containing a substrate containing resin or rubber and oxide glass. A laminate 8 comprising a substrate 9 containing resin or rubber and oxide glass 10 formed at least on one surface of the substrate, in which the oxide glass softens and fluidizes at a temperature equal to or lower than the softening temperature of the substrate and adheres to the substrate.
    Type: Application
    Filed: November 21, 2012
    Publication date: January 22, 2015
    Applicant: Hitachi, Ltd.
    Inventors: Yuichi Sawai, Takashi Naito, Takuya Aoyagi, Tadashi Fujieda, Hajime Murakami, Hiroshi Yoshida, Masahiko Ogino, Akihiro Miyauchi
  • Publication number: 20150017409
    Abstract: The gas barrier property of a laminate constituted by a base material containing a resin or a rubber and an oxide glass is improved. A composite member containing an oxide glass 2 formed as a layer densely on a base material 1 containing a resin or a rubber, in which the oxide glass is bonded to the base material by irradiating the oxide glass with an electromagnetic wave and softening and fluidizing the oxide glass.
    Type: Application
    Filed: November 21, 2012
    Publication date: January 15, 2015
    Applicant: Hitachi, Ltd.
    Inventors: Takashi Naito, Tadashi Fujieda, Takuya Aoyagi, Yuichi Sawai, Hajime Murakami, Masahiko Ogino, Akihiro Miyauchi, Hiroshi Yoshida
  • Publication number: 20150008573
    Abstract: Bondability and heat conductivity of a bonded body in which some of metal, ceramic, or semiconductor are bonded to each other are improved. In the bonded body in which a first member and a second member each comprise one of metal, ceramic, or semiconductor are bonded to each other, the second member is bonded to the first member by way of an adhesive member disposed to the surface of the first member, and the adhesive member contains a V2O5-containing glass and metal particles.
    Type: Application
    Filed: November 21, 2012
    Publication date: January 8, 2015
    Inventors: Yuichi Sawai, Takashi Naito, Takuya Aoyagi, Tadashi Fujieda, Mutsuhiro Mori
  • Publication number: 20140378581
    Abstract: Mechanical strength of a composite material is enhanced by a simple process. In a composite material comprising a resin or a rubber and an oxide glass, the resin or the rubber is dispersed in the oxide glass, or the oxide glass is dispersed in the resin or the rubber. The composite material has a function that the oxide glass is softened and fluidized by electromagnetic waves.
    Type: Application
    Filed: November 19, 2012
    Publication date: December 25, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Takuya Aoyagi, Takashi Naito, Tadashi Fujieda, Yuichi Sawai, Hajime Murakami, Hiroshi Yoshida, Akihiro Miyauchi, Masahiko Ogino
  • Publication number: 20140356717
    Abstract: The present invention is directed to a lithium ion secondary battery positive electrode, a lithium ion secondary battery, a vehicle mounting the same, and an electric power storage system, which improve the electron conductivity even inside an active material formed into a secondary particle.
    Type: Application
    Filed: November 21, 2012
    Publication date: December 4, 2014
    Inventors: Akira Gunji, Shin Takahashi, Hiroaki Konishi, Xiaoliang Feng, Takuya Aoyagi
  • Patent number: 8895460
    Abstract: A glass composition according to the present invention comprises: phosphorus, vanadium and at least one transition metal selected from a group consisting of tungsten, iron, and manganese, the glass composition not containing substances included in the JIG level A and B lists, a softening point of the glass composition being 550° C. or lower.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 25, 2014
    Assignee: Hitachi Powdered Metals Co., Ltd.
    Inventors: Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Takashi Naito, Takuya Aoyagi
  • Publication number: 20140334937
    Abstract: Mechanical strength of a composite material is enhanced by a simple process. In a composite material comprising a resin or a rubber and an oxide glass, the resin or the rubber is dispersed in the oxide glass, or the oxide glass is dispersed in the resin or the rubber, and the oxide glass is softened and fluidized by heating at or lower than a heat decomposition temperature of the resin or the rubber.
    Type: Application
    Filed: November 1, 2012
    Publication date: November 13, 2014
    Applicant: HITACHI, LTD.
    Inventors: Tadashi Fujieda, Takashi Naito, Takuya Aoyagi, Yuichi Sawai, Hajime Murakami, Hiroshi Yoshida, Akihiro Miyauchi, Masahiko Ogino
  • Publication number: 20140285039
    Abstract: An aluminum wire body, in which an aluminum or aluminum alloy electric wire and a metal to be joined are joined by solder, wherein the solder includes an oxide glass including vanadium and a conducting particle. Preferably, the conducting particle contained in the solder is 90% by volume or less and the oxide glass is 20% by volume to 90% by volume. Further preferably, the oxide glass includes 40% by mass or more of Ag2O in terms of oxides and the glass transition point is 180° C. or less.
    Type: Application
    Filed: February 11, 2014
    Publication date: September 25, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Takuya AOYAGI, Motomune KODAMA, Takashi NAITO, Tadashi FUJIEDA, Yuichi SAWAI, Masanori MIYAGI, Haruo AKAHOSHI, Norihisa IWASAKI
  • Publication number: 20140287227
    Abstract: Disclosed is a jointed body wherein multiple base members are jointed to each other through a jointing layer, and at least one of the base members is a base member of a ceramic material, semiconductor or glass. The joint material layer contains a metal and an oxide. The oxide contains V and Te, and is present between the metal and the base members. Disclosed is also a joint material in the form of a paste containing an oxide glass containing V and Te, metal particles, and a solvent; in the form of a foil piece or plate in which particles of an oxide glass containing V and Te are embedded; or in the form of a foil piece or plate containing a layer of an oxide glass containing V and Te, and a layer of a metal.
    Type: Application
    Filed: February 12, 2014
    Publication date: September 25, 2014
    Applicant: HITACHI, LTD.
    Inventors: Motomune KODAMA, Takashi NAITO, Tadashi FUJIEDA, Yuichi SAWAI, Takuya AOYAGI, Masanori MIYAGI
  • Patent number: 8802963
    Abstract: A thermoelectric conversion material is provided, in which only a desired crystal is selectively precipitated. An MxV2O5 crystal is selectively precipitated in vanadium-based glass, wherein M is one metal element selected from the group consisting of iron, arsenic, antimony, bismuth, tungsten, molybdenum, manganese, nickel, copper, silver, an alkali metal and an alkaline earth metal, and 0<x<1.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: August 12, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Takashi Naito, Takuya Aoyagi
  • Patent number: 8790549
    Abstract: An object of the present invention is to provide an electronic component using a Cu-based conductive material that can suppress oxidization even in a heat treatment in an oxidizing atmosphere and that can suppress an increase in an electrical resistance. In an electronic component having an electrode or a wiring, a ternary alloy made from three elements consisting of Cu, Al, and Co is used as a Cu-based wiring material that can prevent oxidization of the electrode or the wiring. Specifically, part or the whole of the electrode or the wiring has a chemical composition in which an Al content is 10 at % to 25 at %, a Co content is 5 at % to 20 at %, and the balance is composed of Cu and unavoidable impurities, and the chemical composition represents a ternary alloy in which two phases of a Cu solid solution formed by Al and Co being dissolved into Cu and a CoAl intermetallic compound coexist together.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: July 29, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takahiko Kato, Takashi Naito, Hiroki Yamamoto, Takuya Aoyagi, Seiichi Watanabe, Seiji Miura, Norihito Sakaguchi, Kazuki Aoshima, Kenji Ohkubo
  • Publication number: 20140145122
    Abstract: The present invention aims at providing a lead-free glass composition that can be soften and flowed at a firing temperature that is equal to or lower than that of conventional low melting point lead glass. Furthermore, the present invention aims at providing a lead-free glass composition having fine thermal stability and fine chemical stability in addition to that property. The lead-free glass composition according to the present invention is characterized by comprising at least Ag2O, V2O5 and TeO2 when the components are represented by oxides, wherein the total content ratio of Ag2O, V2O5 and TeO2 is 75 mass % or more. Preferably, the lead-free glass composition comprises 10 to 60 mass % of Ag2O, 5 to 65 mass % of V2O5, and 15 to 50 mass % of TeO2.
    Type: Application
    Filed: June 25, 2012
    Publication date: May 29, 2014
    Inventors: Yuichi Sawai, Takashi Naito, Takuya Aoyagi, Tadashi Fujieda
  • Patent number: 8685872
    Abstract: A low softening point glass composition, which is substantially free from lead, bismuth and antimony and comprises oxides of vanadium, phosphorous, tellurium and iron, a softening point of the composition being 380° C. or lower.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: April 1, 2014
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Takashi Naito, Shinichi Tachizono, Kei Yoshimura, Yuji Hashiba, Keiichi Kanazawa, Shinji Yamada, Satoru Amou, Hiroki Yamamoto, Takuya Aoyagi