Patents by Inventor Takashi Tatsuzawa

Takashi Tatsuzawa 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: 11667817
    Abstract: A conductive film includes an elongated release film and a plurality of conductive adhesive film pieces provided on the release film. Then, the plurality of adhesive film pieces are arranged in a longitudinal direction X of the release film. For this reason, the adhesive film piece can be set to an arbitrary shape. Accordingly, it is possible to attach the adhesive film piece to adhesive surfaces having various shapes and to efficiently use the adhesive film piece.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: June 6, 2023
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Takashi Tatsuzawa, Kazuya Matsuda, Yutaka Tsuchida, Takashi Seki, Mitsuyoshi Shimamura, Kengo Shinohara, Tetsuyuki Shirakawa, Yasunori Kawabata, Satoru Matsumoto
  • Publication number: 20230137299
    Abstract: A conductive film includes an elongated release film and a plurality of conductive adhesive film pieces provided on the release film. Then, the plurality of adhesive film pieces are arranged in a longitudinal direction X of the release film. For this reason, the adhesive film piece can be set to an arbitrary shape. Accordingly, it is possible to attach the adhesive film piece to adhesive surfaces having various shapes and to efficiently use the adhesive film piece.
    Type: Application
    Filed: December 28, 2022
    Publication date: May 4, 2023
    Inventors: Takashi TATSUZAWA, Kazuya MATSUDA, Yutaka TSUCHIDA, Takashi SEKI, Mitsuyoshi SHIMAMURA, Kengo SHINOHARA, Tetsuyuki SHIRAKAWA, Yasunori KAWABATA, Satoru MATSUMOTO
  • Publication number: 20190241771
    Abstract: A conductive film includes an elongated release film and a plurality of conductive adhesive film pieces provided on the release film. Then, the plurality of adhesive film pieces are arranged in a longitudinal direction X of the release film. For this reason, the adhesive film piece can be set to an arbitrary shape. Accordingly, it is possible to attach the adhesive film piece to adhesive surfaces having various shapes and to efficiently use the adhesive film piece.
    Type: Application
    Filed: September 26, 2017
    Publication date: August 8, 2019
    Inventors: Takashi TATSUZAWA, Kazuya MATSUDA, Yutaka TSUCHIDA, Takashi SEKI, Mitsuyoshi SHIMAMURA, Kengo SHINOHARA, Tetsuyuki SHIRAKAWA, Yasunori KAWABATA, Satoru MATSUMOTO
  • Patent number: 8558118
    Abstract: The circuit-connecting material for connection between circuit members each having a board and a circuit electrode formed on the primary surface of the board, comprising an adhesive composition that cures in response to light or heat and an organic compound containing a urethane group and an ester group.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: October 15, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Takashi Nakazawa, Kouji Kobayashi, Tohru Fujinawa, Takashi Tatsuzawa
  • Patent number: 8541688
    Abstract: The circuit-connecting material for connection between circuit members each having a board and a circuit electrode formed on the primary surface of the board, comprising an adhesive composition that cures in response to light or heat and an organic compound containing a urethane group and an ester group.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: September 24, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Takashi Nakazawa, Kouji Kobayashi, Tohru Fujinawa, Takashi Tatsuzawa
  • Patent number: 8497431
    Abstract: The circuit-connecting material for connection between circuit members each having a board and a circuit electrode formed on the primary surface of the board, comprising an adhesive composition that cures in response to light or heat and an organic compound containing a urethane group and an ester group.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: July 30, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Takashi Nakazawa, Kouji Kobayashi, Tohru Fujinawa, Takashi Tatsuzawa
  • Publication number: 20120085579
    Abstract: An adhesive composition comprising: an adhesive component, conductive particles and insulating particles, wherein the ratio of the mean particle size of the insulating particles Ri to the mean particle size of the conductive particles Rc (Ri/Rc) is 120 to 300%.
    Type: Application
    Filed: December 14, 2006
    Publication date: April 12, 2012
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Tatsuzawa, Kouji Kobayashi, Tohru Fujinawa, Naoki Fukushima
  • Publication number: 20120015126
    Abstract: A bonding-material reel according to the present invention includes a tape for circuit connection having a tape-shaped base material and an adhesive layer formed on one surface of the base material, and a core around which the tape for circuit connection is wound, wherein the tape for circuit connection has a region in which an adhesive layer is not formed over at least one reel length of the core toward the start end of the tape for circuit connection from the terminal end thereof, and an end tape which is bonded to the terminal end of the tape for circuit connection so as to cover the region, and extends toward the core from the terminal end.
    Type: Application
    Filed: March 12, 2010
    Publication date: January 19, 2012
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Tatsuzawa, Takashi Seki, Kouji Kobayashi, Tohru Fujinawa, Motohiro Arifuku, Kotaro Seki
  • Publication number: 20110300326
    Abstract: The bonding-material reel according to the present invention includes a tape for circuit connection having a tape-shaped base material and an adhesive layer formed on one surface of the base material, and a core around which the tape for circuit connection is wound, wherein the tape for circuit connection has an end tape which has been bonded to the terminal end, a region in which the adhesive layer is not formed over at least one reel length of the core toward the start end of the tape for circuit connection from the terminal end thereof, and a cover tape which is provided so as to cover the region.
    Type: Application
    Filed: February 24, 2010
    Publication date: December 8, 2011
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Tatsuzawa, Takashi Seki, Kouji Kobayashi, Tohru Fujinawa, Motohiro Arifuku, Kotaro Seki
  • Publication number: 20100277885
    Abstract: A circuit connecting material which is situated between mutually opposing circuit electrodes and, upon pressing the mutually opposing circuit electrodes, electrically connects the electrodes in the pressing direction, the circuit connecting material having a laminated construction comprising an anisotropic conductive adhesive layer A with conductive particles 21 dispersed therein and an insulating adhesive layer B, wherein the adhesive force of the insulating adhesive layer B for glass substrates is greater than the adhesive force of the anisotropic conductive adhesive layer A for glass substrates.
    Type: Application
    Filed: December 16, 2008
    Publication date: November 4, 2010
    Applicant: HITACHI CHEMICAL COMOANY, LTD.
    Inventors: Takashi Tatsuzawa, Kouji Kobayashi, Akihiro Ito
  • Publication number: 20100243303
    Abstract: The present invention provides a circuit connecting material for electrically connecting a first circuit member having a first circuit electrode formed on a major surface of a first circuit substrate, and a second circuit member having a second circuit electrode formed on a major surface of a second circuit substrate, with the first and the second circuit electrodes opposed to each other, comprising an adhesive component containing a fluorine-containing organic compound, wherein the adhesive component contains 0.10% or less by mass of a silicon-containing compound, in terms of silicon atoms, based on the total amount of the adhesive component.
    Type: Application
    Filed: August 20, 2007
    Publication date: September 30, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Kouji Kobayashi, Takashi Nakazawa, Takashi Tatsuzawa, Katsuyuki Masuda, Takako Ejiri
  • Publication number: 20100221533
    Abstract: A circuit connecting adhesive film comprising an insulating adhesive, conductive particles and a particulate non-conductive phase containing a polyamide-based elastomer and/or a polyester-based elastomer, wherein the conductive particles and non-conductive phase are dispersed in the insulating adhesive.
    Type: Application
    Filed: October 8, 2008
    Publication date: September 2, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Tatsuzawa, Kouji Kobayashi, Akihiro Ito, Tomomi Yokozumi
  • Patent number: 7785708
    Abstract: The present invention provides an adhesive film for circuit connection which is to be interposed between circuit electrodes facing each other and used for electrically connecting the circuit electrodes to each other, which comprises a curing agent to generate free radicals with heating, a radically polymerizable substance, and a film-forming polymer, and in which a temporary fixing power to a flexible substrate having the circuit electrode is 40-180 N/m.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: August 31, 2010
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Takashi Tatsuzawa, Itsuo Watanabe, Naoki Fukushima, Masahide Kume
  • Publication number: 20100212943
    Abstract: The circuit-connecting material for connection between circuit members each having a board and a circuit electrode formed on the primary surface of the board, comprising an adhesive composition that cures in response to light or heat and an organic compound containing a urethane group and an ester group.
    Type: Application
    Filed: April 29, 2010
    Publication date: August 26, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Takashi Nakazawa, Kouji Kobayashi, Tohru Fujinawa, Takashi Tatsuzawa
  • Publication number: 20100208444
    Abstract: The circuit-connecting material for connection between circuit members each having a board and a circuit electrode formed on the primary surface of the board, comprising an adhesive composition that cures in response to light or heat and an organic compound containing a urethane group and an ester group.
    Type: Application
    Filed: April 29, 2010
    Publication date: August 19, 2010
    Applicant: Hitachi Chemical Company, Ltd.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Takashi Nakazawa, Kouji Kobayashi, Tohru Fujinawa, Takashi Tatsuzawa
  • Patent number: 7776438
    Abstract: The present invention provides an adhesive film for circuit connection which is to be interposed between circuit electrodes facing each other and used for electrically connecting the circuit electrodes to each other, which comprises a curing agent to generate free radicals with heating, a radically polymerizable substance, and a film-forming polymer, and in which a temporary fixing power to a flexible substrate having the circuit electrode is 40-180 N/m.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: August 17, 2010
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Takashi Tatsuzawa, Itsuo Watanabe, Naoki Fukushima, Masahide Kume
  • Publication number: 20100108365
    Abstract: The circuit-connecting material for connection between circuit members each having a board and a circuit electrode formed on the primary surface of the board, comprising an adhesive composition that cures in response to light or heat and an organic compound containing a urethane group and an ester group.
    Type: Application
    Filed: July 21, 2006
    Publication date: May 6, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Motohiro Arifuku, Nichiomi Mochizuki, Takashi Nakazawa, Kouji Kobayashi, Tohru Fujinawa, Takashi Tatsuzawa
  • Publication number: 20100018755
    Abstract: The anisotropic conductive tape (1) of the invention is used for electrical connection between opposing circuit electrodes and is provided with a tape-like base material (20) and with multiple adhesive layers (11b, 12b) formed in parallel on the main side of the base material (20) along the lengthwise direction of the base material (20), wherein at least two of the multiple adhesive layers have different structures.
    Type: Application
    Filed: August 3, 2007
    Publication date: January 28, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Tatsuzawa, Kouji Kobayashi, Katsuyuki Ueno
  • Publication number: 20100012358
    Abstract: The circuit-connecting material of the present invention is a circuit-connecting material for connecting a first circuit component having a plurality of first circuit electrodes on a main surface of a first circuit board and a second circuit component having a plurality of second circuit electrodes on a main surface of a second circuit board, in such a manner that the first circuit electrodes and the second circuit electrodes are electrically connected while being opposed to one another; wherein the circuit-connecting material contains an adhesive composition, conductive particles, and a plurality of insulating particles containing one or both of polyamic acid particles and polyimide particles.
    Type: Application
    Filed: August 6, 2007
    Publication date: January 21, 2010
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Takashi Tatsuzawa, Kouji Kobayashi, Naoki Fukushima, Takanobu Kobayashi, Akihiro Ito
  • Publication number: 20080064849
    Abstract: The present invention provides an adhesive film for circuit connection which is to be interposed between circuit electrodes facing each other and used for electrically connecting the circuit electrodes to each other, which comprises a curing agent to generate free radicals with heating, a radically polymerizable substance, and a film-forming polymer, and in which a temporary fixing power to a flexible substrate having the circuit electrode is 40-180 N/m.
    Type: Application
    Filed: October 25, 2007
    Publication date: March 13, 2008
    Applicant: HITACHI CHEMICAL CO., LTD.
    Inventors: Takashi Tatsuzawa, Itsuo Watanabe, Naoki Fukushima, Masahide Kume