Patents by Inventor Kazuyoshi Kojima

Kazuyoshi Kojima 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).

  • Patent number: 8501045
    Abstract: The present invention is a circuit connecting material used for the mutual connection of a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, and a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, with the edge parts and of the insulating layers being formed with a greater thickness than the electrodes on the basis of the main surfaces, wherein this circuit connecting material contains a bonding agent composition and conductive particles that have a mean particle size of 1 ?m or greater but less than 10 ?m and a hardness of 1.961 to 6.865 GPa, and this circuit connecting material exhibits a storage elastic modulus of 0.5 to 3 GPa at 40° C. and a mean coefficient of thermal expansion of 30 to 200 ppm/° C. at from 25° C. to 100° C. when subjected to the curing treatment.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: August 6, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Motohiro Arifuku, Itsuo Watanabe, Yasushi Gotou, Kouji Kobayashi, Kazuyoshi Kojima
  • Patent number: 8273457
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: September 25, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 8273458
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: September 25, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 8252419
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 28, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 8202622
    Abstract: The present invention is a circuit connecting material used for the mutual connection of a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, and a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, with the edge parts and of the insulating layers being formed with a greater thickness than the electrodes on the basis of the main surfaces, wherein this circuit connecting material contains a bonding agent composition and conductive particles that have a mean particle size of 1 ?m or greater but less than 10 ?m and a hardness of 1.961 to 6.865 GPa, and this circuit connecting material exhibits a storage elastic modulus of 0.5 to 3 GPa at 40° C. and a mean coefficient of thermal expansion of 30 to 200 ppm/° C. at from 25° C. to 100° C. when subjected to the curing treatment.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: June 19, 2012
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Motohiro Arifuku, Itsuo Watanabe, Yasushi Gotou, Kouji Kobayashi, Kazuyoshi Kojima
  • Patent number: 8132319
    Abstract: The invention provides a circuit connecting method that can satisfactorily reduce connection resistance between circuit electrodes electrically connected via an anisotropic conductive film for circuit connection. The circuit connecting method comprises a step of preparing a circuit member 12 having circuit electrodes 12b formed on a glass substrate 12a, a step of preparing a flexible wiring board 14 having circuit electrodes 14b formed on a base 14a and provided with a solder resist 18 at the sections of the circuit electrodes 14b other than the sections that are connected to the circuit electrodes 12b, and a step of bonding the circuit member 12 to the flexible wiring board 14 via an anisotropic conductive film for circuit connection 16 so that part of the anisotropic conductive film for circuit connection 16 overlaps with part of the solder resist 18.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: March 13, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Motohiro Arifuku, Kazuyoshi Kojima, Kouji Kobayashi
  • Publication number: 20110267791
    Abstract: A circuit connection material 10 comprising an adhesive composition 11 and conductive particles 12, wherein the conductive particles 12 are conductive particles 12 with protrusions 14 comprising one or more metal layers 22 on a core 21, with the metal layer 22 being formed on at least surfaces of the protrusions 14 and the metal layer 22 being composed of nickel or a nickel alloy, and compression modulus of the conductive particles 12 under 20% compression is 100-800 kgf/mm2.
    Type: Application
    Filed: July 31, 2008
    Publication date: November 3, 2011
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Katsuhiko Tomisaka, Kouji Kobayashi, Jun Taketatsu, Motohiro Arifuku, Kazuyoshi Kojima, Nichiomi Mochizuki
  • Patent number: 8043709
    Abstract: The present invention is a circuit connecting material used for the mutual connection of a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, and a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, with the edge parts and of the insulating layers being formed with a greater thickness than the electrodes on the basis of the main surfaces, wherein this circuit connecting material contains a bonding agent composition and conductive particles that have a mean particle size of 1 ?m or greater but less than 10 ?m and a hardness of 1.961 to 6.865 GPa, and this circuit connecting material exhibits a storage elastic modulus of 0.5 to 3 GPa at 40° C. and a mean coefficient of thermal expansion of 30 to 200 ppm/° C. at from 25° C. to 100° C. when subjected to the curing treatment.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: October 25, 2011
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Motohiro Arifuku, Itsuo Watanabe, Yasushi Gotou, Kouji Kobayashi, Kazuyoshi Kojima
  • Publication number: 20110247757
    Abstract: The present invention is a circuit connecting material used for the mutual connection of a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, and a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, with the edge parts and of the insulating layers being formed with a greater thickness than the electrodes on the basis of the main surfaces, wherein this circuit connecting material contains a bonding agent composition and conductive particles that have a mean particle size of 1 ?m or greater but less than 10 ?m and a hardness of 1.961 to 6.865 GPa, and this circuit connecting material exhibits a storage elastic modulus of 0.5 to 3 GPa at 40° C. and a mean coefficient of thermal expansion of 30 to 200 ppm/° C. at from 25° C. to 100° C. when subjected to the curing treatment.
    Type: Application
    Filed: June 17, 2011
    Publication date: October 13, 2011
    Inventors: Motohiro ARIFUKU, Itsuo Watanabe, Yasushi Gotou, Kouji Kobayashi, Kazuyoshi Kojima
  • Publication number: 20110247870
    Abstract: The present invention is a circuit connecting material used for the mutual connection of a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, and a circuit member in which electrodes and insulating layers are formed adjacent to each other on the surface of a board, with the edge parts and of the insulating layers being formed with a greater thickness than the electrodes on the basis of the main surfaces, wherein this circuit connecting material contains a bonding agent composition and conductive particles that have a mean particle size of 1 ?m or greater but less than 10 ?m and a hardness of 1.961 to 6.865 GPa, and this circuit connecting material exhibits a storage elastic modulus of 0.5 to 3 GPa at 40° C. and a mean coefficient of thermal expansion of 30 to 200 ppm/° C. at from 25° C. to 100° C. when subjected to the curing treatment.
    Type: Application
    Filed: June 17, 2011
    Publication date: October 13, 2011
    Inventors: Motohiro Arifuku, Itsuo Watanabe, Yasushi Gotou, Kouji Kobayashi, Kazuyoshi Kojima
  • Publication number: 20110247874
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Inventors: Itsuo WATANABE, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Publication number: 20110247867
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Inventors: Itsuo WATANABE, Kenzo TAKEMURA, Akira NAGAI, Kazuhiro ISAKA, Osamu WATANABE, Kazuyoshi KOJIMA
  • Publication number: 20110247873
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Inventors: Itsuo WATANABE, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 7879445
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: February 1, 2011
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Publication number: 20100307805
    Abstract: The circuit connecting material of the invention is a circuit connecting material for connection between a first circuit member having a first circuit electrode formed on the main side of a first board, and a second circuit member having a second circuit electrode formed on the main side of a second board, with the first circuit electrode and second circuit electrode laid facing each other, the circuit connecting material comprising a curing agent that generates free radicals, a radical polymerizing substance and a compound containing secondary thiol group. The circuit connecting material of the invention is capable of low-temperature rapid curing and has excellent storage stability.
    Type: Application
    Filed: August 29, 2008
    Publication date: December 9, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Nakazawa, Motohiro Arifuku, Kazuyoshi Kojima, Nichiomi Mochizuki
  • Publication number: 20100277884
    Abstract: The circuit-connecting material of the invention is a circuit-connecting material for connection between a first circuit member having a first circuit electrode formed on the main side of a first board, and a second circuit member having a second circuit electrode formed on the main side of a second board, with the first circuit electrode and the second circuit electrode laid facing each other, the circuit-connecting material comprising a film-forming material, a curing agent that generates free radicals upon heating, a radical-polymerizing substance, an isocyanate group-containing compound and a ketimine group-containing compound represented by the following general formula (I), wherein the isocyanate group-containing compound content is 0.1-5 parts by weight and the ketimine group-containing compound content is 0.1-5 parts by weight with respect to 100 parts by weight as the total of the film-forming material and radical-polymerizing substance.
    Type: Application
    Filed: September 29, 2008
    Publication date: November 4, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Motohiro Arifuku, Kouji Kobayashi, Kazuyoshi Kojima, Nichiomi Mochizuki, Sunao Kudou
  • Publication number: 20100263208
    Abstract: The invention provides a circuit connecting method that can satisfactorily reduce connection resistance between circuit electrodes electrically connected via an anisotropic conductive film for circuit connection. The circuit connecting method comprises a step of preparing a circuit member 12 having circuit electrodes 12b formed on a glass substrate 12a, a step of preparing a flexible wiring board 14 having circuit electrodes 14b formed on a base 14a and provided with a solder resist 18 at the sections of the circuit electrodes 14b other than the sections that are connected to the circuit electrodes 12b, and a step of bonding the circuit member 12 to the flexible wiring board 14 via an anisotropic conductive film for circuit connection 16 so that part of the anisotropic conductive film for circuit connection 16 overlaps with part of the solder resist 18.
    Type: Application
    Filed: February 6, 2008
    Publication date: October 21, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Motohiro Arifuku, Kazuyoshi Kojima, Kouji Kobayashi
  • Publication number: 20100139947
    Abstract: A circuit-connecting material for electrical connection of two circuit members with circuit electrodes formed thereon, with the circuit electrodes opposing, wherein the circuit-connecting material comprises an adhesive composition and conductive particles, and the conductive particles are conductive particles having a plurality of protrusions on the surface and consisting of a core made of an organic high molecular compound covered with a metal layer composed of nickel or a nickel alloy, the mean particle size of the core being 1-4 ?m and the thickness of the metal layer being 65-125 nm.
    Type: Application
    Filed: May 14, 2008
    Publication date: June 10, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Kazuyoshi Kojima, Kouji Kobayashi, Motohiro Arifuku, Nichiomi Mochizuki
  • Publication number: 20100140556
    Abstract: A filmy adhesive for circuit connection that is interposed between circuit electrodes opposed to each other and by heating and applying pressure to the circuit electrodes opposed to each other, attains electrical connection between the electrodes along the direction of pressure application, characterized in that the angle of contact of the adhesive after hardening with water is 90° or greater.
    Type: Application
    Filed: June 13, 2007
    Publication date: June 10, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Kazuyoshi Kojima, Kouji Kobayashi, Motohiro Arifuku
  • Publication number: 20100025097
    Abstract: There is provided a circuit connection structure that can provide satisfactory electrical connection between opposing circuit electrodes and that can sufficiently increase the long-term reliability of electrical characteristics between circuit electrodes.
    Type: Application
    Filed: October 30, 2007
    Publication date: February 4, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Kazuyoshi Kojima, Kouji Kobayashi, Motohiro Arifuku, Nichiomi Mochizuki