Patents by Inventor Koichi Fujimaru

Koichi Fujimaru 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: 20200010701
    Abstract: Provided is active energy ray-curable ink for offset printing which has marked curability and toning resistance during printing, exhibits good transferability and adhesiveness to plastic films having low wettability, and imparts high hiding power to printed matter. The active energy ray-curable ink for offset printing includes a pigment, a polyfunctional (meth)acrylate having a hydroxyl group, and a resin having an ethylenic unsaturated group and a hydrophilic group.
    Type: Application
    Filed: February 28, 2018
    Publication date: January 9, 2020
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Yuichi TSUJI, Hironobu SADAKUNI, Noboru KOSHIMIZU, Koichi FUJIMARU, Takejiro INOUE
  • Patent number: 10294395
    Abstract: The purpose of the present invention is to provide an adhesive composition which allows an alignment mark to be recognized, ensures sufficient solder wettability of a joining section, and is excellent in suppression of void generation. The adhesive composition includes: a high-molecular compound (A); an epoxy compound (B) having a weight average molecular weight of 100 or more and 3,000 or less; and a flux (C); and inorganic particles (D) which have on the surfaces thereof an alkoxysilane having a phenyl group and which have an average particle diameter of 30 to 200 nm, the flux (C) containing an acid-modified rosin.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: May 21, 2019
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Kazuyuki Matsumura, Koichi Fujimaru, Daisuke Kanamori
  • Publication number: 20170362472
    Abstract: The purpose of the present invention is to provide an adhesive composition which allows an alignment mark to be recognized, ensures sufficient solder wettability of a joining section, and is excellent in suppression of void generation. The adhesive composition includes: a high-molecular compound (A); an epoxy compound (B) having a weight average molecular weight of 100 or more and 3,000 or less; and a flux (C); and inorganic particles (D) which have on the surfaces thereof an alkoxysilane having a phenyl group and which have an average, particle diameter of 30 to 200 nm, the flux (C) containing an acid-modified rosin.
    Type: Application
    Filed: December 1, 2015
    Publication date: December 21, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Kazuyuki Matsumura, Koichi Fujimaru, Daisuke Kanamori
  • Patent number: 9591768
    Abstract: The present invention relates to an adhesive agent which can be used in the mounting of a semiconductor chip on a circuit board or the like. The present invention addresses the problem of providing an adhesive agent having both excellent storage stability and excellent connection reliability. A means for solving the problem is an adhesive agent comprising (a) a polyamide, (b) an epoxy compound and (c) an acid-modified rosin.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: March 7, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Koichi Fujimaru, Toshihisa Nonaka
  • Publication number: 20150315436
    Abstract: The present invention relates to an adhesive agent which can be used in the mounting of a semiconductor chip on a circuit board or the like. The present invention addresses the problem of providing an adhesive agent having both excellent storage stability and excellent connection reliability. A means for solving the problem is an adhesive agent comprising (a) a polyamide, (b) an epoxy compound and (c) an acid-modified rosin.
    Type: Application
    Filed: December 4, 2013
    Publication date: November 5, 2015
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Koichi FUJIMARU, Toshihisa NONAKA
  • Publication number: 20150072477
    Abstract: An adhesive sheet for production of a semiconductor device with bump electrode, including a soft film and an alkali-soluble adhesive film formed on the soft film is capable of exposing the bump electrode without imparting damage to the bump electrode, and then wet etching of an adhesive on bump tops using an aqueous alkali solution makes it possible to put into a state where no adhesive exists on the bump tops, thus enabling the production of a semiconductor device which is excellent in connection reliability after flip chip packaging.
    Type: Application
    Filed: May 21, 2013
    Publication date: March 12, 2015
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Kazuyuki Matsumura, Koichi Fujimaru, Toshihisa Nonaka
  • Publication number: 20140291870
    Abstract: A resin composition excellent in both characteristics of preservation stability and connection reliability is provided by a resin composition that contains (a) an epoxy compound, (b) a microcapsule type hardening acceleration agent, and (c) an inorganic particle whose surface is modified with a compound that has an unsaturated double bond.
    Type: Application
    Filed: October 24, 2012
    Publication date: October 2, 2014
    Inventors: Yoichi Shimba, Koichi Fujimaru, Toshihisa Nonaka
  • Patent number: 8653202
    Abstract: An adhesive composition for semiconductor containing an organic-solvent-soluble polyimide (a), an epoxy compound (b) and a hardening accelerator (c), wherein per 100 wt parts of the epoxy compound (b), there are contained 15 to 90 wt parts of the organic-solvent-soluble polyimide (a) and 0.1 to 10 wt parts of the hardening accelerator (c), wherein the epoxy compound (b) contains a compound being liquid at 25° C. under 1.013×105 N/m2 and a compound being solid at 25° C. under 1.013×105 N/m2, and wherein a ratio of compound being liquid based on all the epoxy compounds is 20 wt % or more and 60 wt % or less.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: February 18, 2014
    Assignee: TORAY Industries, Inc.
    Inventors: Koichi Fujimaru, Toshihisa Nonaka
  • Publication number: 20120129988
    Abstract: Provided is an adhesive composition having both excellent storability and excellent connection reliability. The adhesive composition comprises (a) a polyimide soluble in organic solvents, (b) an epoxy compound, (c) particles of a curing accelerator, and (d) inorganic particles, the amounts of the organic-solvent-soluble polyimide (a) and the curing-accelerator particles (c) being 15-90 parts by weight and 0.1-50 parts by weight, respectively, per 100 parts by weight of the epoxy compound (b), and the content of the inorganic particles (d) being 30-80 wt. % of the total amount of (a) to (d).
    Type: Application
    Filed: June 23, 2010
    Publication date: May 24, 2012
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Koichi Fujimaru, Toshihisa Nonaka, Yoshiko Tatsuta
  • Patent number: 7960462
    Abstract: The present invention is an optical waveguide-forming paste composition including (A) barium sulfate particles with a mean particle diameter of 1 nm or more to 50 nm or less, (B) a compound having a polymerizable group and a carboxyl group, or a phosphoric ester compound having a polymerizable group, and (C) an organic solvent.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: June 14, 2011
    Assignee: Toray Industries, Inc.
    Inventors: Yoichi Shinba, Hiroyuki Niwa, Yoshiko Tatsuta, Koichi Fujimaru, Toshihisa Nonaka
  • Publication number: 20090270541
    Abstract: Problems: an object of the present invention is to provide an optical waveguide-forming paste composition that allows short-time curing and provides excellent developability. Means for Solving: The present invention is directed to an optical waveguide-forming paste composition including (A) barium sulfate particles with a mean particle diameter of 1 nm or more to 50 nm or less, (B) a compound having a polymerizable group and a carboxyl group, or a phosphoric ester compound having a polymerizable group, and (C) an organic solvent.
    Type: Application
    Filed: November 6, 2007
    Publication date: October 29, 2009
    Inventors: Yoichi Shinba, Hiroyuki Niwa, Yoshiko Tatsuta, Koichi Fujimaru, Toshihisa Nonaka
  • Publication number: 20090123747
    Abstract: [Problems] To provided an adhesive composition for semiconductor that permits handling without an occurrence of cracking or peeling off even when being flexed, that at the time of laminating, permits laminating on the electrode side of a semiconductor wafer provided with bump electrodes of which bump electrodes have a narrow pitch and a high pin proportion, that at the time of dicing, permits a high-speed cutting without any dicing dust contamination or defect, and that facilitates detection of alignment marks at the time of dicing and flip chip assembly. [Means for Solving Problems] There is provided an adhesive composition for semiconductor comprising an organic-solvent-soluble polyimide (a), an epoxy compound (b) and a hardening accelerator (c), wherein per 100 wt parts of the epoxy compound (b), there are contained 15 to 90 wt parts of the organic-solvent-soluble polyimide (a) and 0.1 to 10 wt parts of the hardening accelerator (c), wherein the epoxy compound (b) contains a compound being liquid at 25° C.
    Type: Application
    Filed: June 5, 2006
    Publication date: May 14, 2009
    Inventors: Koichi Fujimaru, Toshihisa Nonaka
  • Patent number: 6783828
    Abstract: A resin composition has a phase separation structure having at least two phases and inorganic particles having a mean primary particle size of 0.1 &mgr;m or less. The phase separation structure includes a matrix phase and a disperse phase. The inorganic particles are mainly present in any one of the matrix phase, the disperse phase, and the interface between the matrix phase and the disperse phase. The resin composition has a high thermal expansion coefficient and elastic modulus, and thus provides an adhesive for semiconductor devices which has excellent reflow resistance and adhesion.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: August 31, 2004
    Assignee: Toray Industries Inc.
    Inventors: Koichi Fujimaru, Toshio Yoshimura, Nobuo Matsumura
  • Publication number: 20030035948
    Abstract: A resin composition has a phase separation structure having at least two phases and inorganic particles having a mean primary particle size of 0.1 &mgr;m or less. The phase separation structure includes a matrix phase and a disperse phase. The inorganic particles are mainly present in any one of the matrix phase, the disperse phase, and the interface between the matrix phase and the disperse phase. The resin composition has a high thermal expansion coefficient and elastic modulus, and thus provides an adhesive for semiconductor devices which has excellent reflow resistance and adhesion.
    Type: Application
    Filed: July 3, 2002
    Publication date: February 20, 2003
    Inventors: Koichi Fujimaru, Toshio Yoshimura, Nobuo Matsumura
  • Patent number: 6194122
    Abstract: A directly imageable waterless planographic printing plate precursor is a laminate of, in turn, at least a heat sensitive layer and a silicon rubber layer on a substrate. The heat sensitive layer includes (A) a light-to-heat converting material and (B) a compound which contains N—N bonds.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: February 27, 2001
    Assignee: Toray Industries, Inc.
    Inventors: Michihiko Ichikawa, Koichi Fujimaru, Norimasa Ikeda, Ken Kawamura, Kazuki Goto