Patents by Inventor Tsutomu Kashiwagi

Tsutomu Kashiwagi 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: 20210061955
    Abstract: Provided is a maleimide resin film highly filled with inorganic particles and having a superior adhesion force. The maleimide resin film contains: (a) a maleimide represented by the following formula (1): wherein A independently represents a tetravalent organic group having a cyclic structure(s); B independently represents an alkylene group that has not less than 6 carbon atoms and at least one aliphatic ring having not less than 5 carbon atoms, and may contain a hetero atom; Q independently represents an arylene group that has not less than 6 carbon atoms, and may contain a hetero atom; W represents a group represented by B or Q; n represents a number of 0 to 100, m represents a number of 0 to 100, provided that at least one of n or m is a positive number; (b) a (meth)acrylate; (c) inorganic particles; and (d) a curing catalyst.
    Type: Application
    Filed: August 11, 2020
    Publication date: March 4, 2021
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroyuki IGUCHI, Yoshihiro TSUTSUMI, Tsutomu KASHIWAGI
  • Patent number: 10818618
    Abstract: An adhesive substrate includes a support base member and an adhesive layer provided on the support base member. The support base member contains electroconductive particles and an insulating resin, and has a recessed and projected pattern with two or more projected portions on one surface or both surfaces of the support base member. The adhesive layer is provided at least on upper surfaces of the projected portions in the recessed and projected pattern of the support base member. The adhesive layer on the upper surfaces of the projected portions has an upper surface with a curved surface. Thus, the present invention provides an adhesive substrate capable of selectively picking up and quickly transferring large amounts of fine chips and particles, a method for producing the adhesive substrate, and a transfer device.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: October 27, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroyuki Iguchi, Toshio Shiobara, Tsutomu Kashiwagi
  • Publication number: 20200156291
    Abstract: This is to provide an anisotropic electro-conductive film having high reliability, which electrically connects circuit electrodes having a fine pattern. Provided is an anisotropic film containing an insulating resin and particle groups, wherein the particle groups are groups of particles in which a plurality of particles are bound together with a binder, and the particle groups are regularly arranged with an interval of 1 ?m to 1,000 ?m.
    Type: Application
    Filed: November 19, 2019
    Publication date: May 21, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroyuki IGUCHI, Toshio SHIOBARA, Tsutomu KASHIWAGI
  • Publication number: 20200131367
    Abstract: One of the purposes of the present invention is to provide a radiation curable organosilicon resin composition which offers a cured product having a sufficient gas barrier property and which further has workability enough for use in spin coating or inkjetting. The present invention provides a radiation curable organosilicon resin composition comprising 100 parts by mass of (A) a (meth)acryloyloxy group-containing organosilane represented by the formula (1) which has a (meth)acryloyloxy group or a monovalent organic group having 4 to 25 carbon atoms and having one, two, or three of said (meth)acryloyloxy group, and 1 to 50 parts by mass of (B) a photopolymerization initiator.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroyuki IGUCHI, Tsutomu KASHIWAGI
  • Publication number: 20200035627
    Abstract: An adhesive substrate includes a support base member and an adhesive layer provided on the support base member. The support base member contains electroconductive particles and an insulating resin, and has a recessed and projected pattern with two or more projected portions on one surface or both surfaces of the support base member. The adhesive layer is provided at least on upper surfaces of the projected portions in the recessed and projected pattern of the support base member. The adhesive layer on the upper surfaces of the projected portions has an upper surface with a curved surface. Thus, the present invention provides an adhesive substrate capable of selectively picking up and quickly transferring large amounts of fine chips and particles, a method for producing the adhesive substrate, and a transfer device.
    Type: Application
    Filed: June 18, 2019
    Publication date: January 30, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroyuki IGUCHI, Toshio SHIOBARA, Tsutomu KASHIWAGI
  • Patent number: 10308803
    Abstract: A silicone-modified epoxy resin composition that offers a cured product excellent in low permeability to gas, mechanical strength, and heat resistance and transparency and further offers an optical semiconductor sealing material excellent in heat cycle resistance, and a cured epoxy resin product obtained by curing the composition. The epoxy resin composition comprises the following components (A) to (C): (A) a silicone-modified epoxy resin having a cyclic siloxane structure, (B) a silicone-modified epoxy resin having a branched siloxane structure, and (C) an epoxy resin curing agent containing a polyvalent carboxylic acid having a tricyclodecane structure and a carboxylic anhydride compound.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: June 4, 2019
    Assignees: Shin-Etsu Chemical Co., Ltd., Nippon Kayaku Kabuhiki Kaisha
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki
  • Publication number: 20190100663
    Abstract: The present invention is an anisotropic conductive film including: a peelable substrate, a base layer containing an insulating resin on the peelable substrate, bumps of electroconductive nanoparticle assemblies disposed on the base layer at intervals of 1 ?m to 100 ?m, and a coating layer containing an insulating resin formed on the base layer so as to coat the bumps, wherein the peelable substrate is peelable to the base layer. This provides an anisotropic conductive film for connecting circuit electrodes having fine patterns.
    Type: Application
    Filed: September 10, 2018
    Publication date: April 4, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroyuki IGUCHI, Toshio SHIOBARA, Tsutomu KASHIWAGI
  • Patent number: 9994711
    Abstract: A condensation-curable silicone composition provides a cured product having good performance at a low temperature, excellent resistance to a temperature change, and a crack resistance, and a semiconductor device has a high reliability, whose semiconductor element is encapsulated with the cured product. A condensation-curable silicone composition has (A) a branched organopolysiloxane represented by formula (1-1) or (1-2) with a short branch made of 1 to 4 siloxane units and (C) a condensation catalyst in a catalytic amount. Further, a condensation-curable silicone composition also has (B) an organopolysiloxane having a network structure and represented by formula (2). Further, a semiconductor device is provided with a cured product obtained by curing the condensation-curable silicone composition.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: June 12, 2018
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayuki Kusunoki, Yuusuke Takamizawa, Tsutomu Kashiwagi
  • Patent number: 9963542
    Abstract: A silicone-modified epoxy resin which yields a cured product having low gas permeability and excellent strength; a composition of the silicone-modified epoxy resin; and an epoxy resin cured product obtainable by curing the composition, are provided. An epoxy resin represented by the following Formula (1): wherein R1 represents a hydrocarbon group having 1 to 6 carbon atoms; X represents an organic group having a norbornane epoxy structure, or a hydrocarbon group having 1 to 6 carbon atoms; n represents an integer from 1 to 3; plural R1s and plural Xs present in the formula may be respectively identical or different; and two or more of plural Xs represent an organic group having a norbornane epoxy structure.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: May 8, 2018
    Assignees: Shin-Etsu Chemical Co., Ltd., Nippon Kayaku Kabushiki Kaisha
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki, Naosuke Taniguchi
  • Patent number: 9944760
    Abstract: The purpose of the present invention is to provide a silicone-modified epoxy resin which produces a cured product having excellent low gas permeability and strength; a composition of the resin; and an epoxy resin cured product obtainable by curing the composition. Disclosed is an epoxy resin represented by the following Formula (1): wherein R1 independently represents a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms; R2 independently represents a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms; R3 independently represents a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms; R4 represents an oxygen atom or a divalent hydrocarbon group having an aliphatic cyclic structure; R5 represents silicone chain having a norbornane epoxy structure at either end; and X represents an organic group having a norbornane epoxy group.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: April 17, 2018
    Assignees: Shin-Etsu Chemical Co., Ltd., Nippon Kayaku Kabushiki Kaisha
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki, Naosuke Taniguchi
  • Patent number: 9862803
    Abstract: One of the purposes of the present invention is to provide a method for preparing an organopolysiloxane having a short branch chain. In particular, the purposes of the present invention is to provide a method for preparing an organopolysiloxane having a shorter side chain than a main chain, such as a siloxane side chain having 1 to 5 siloxane units. The present preparation methods are characterized in that the starting material is an organosiloxane which is represented by the formula (1) and has two hydrolyzable groups bonded to a silicon atom at one terminal. The present invention provides a method wherein an organo(poly)siloxane represented by the formula (1) is condensation reacted to prepare an organopolysiloxane represented by formula (2) which is then used as starting materials for introducing a branch, whereby a short siloxane side chain is efficiently introduced in the organopolysiloxane, while controlling a structure of the main chain.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: January 9, 2018
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayuki Kusunoki, Yuusuke Takamizawa, Tsutomu Kashiwagi
  • Patent number: 9777107
    Abstract: An epoxy resin represented by the following formula (1) wherein R1 represents an alkylene group having 2 to 6 carbon atoms and optionally containing an ester or ether bond; R2 represents a monovalent aliphatic hydrocarbon group having 1 to 6 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms; R3 represents an oxygen atom or a phenylene group; k represents 1 to 10 as an average value; m represents an integer of 0 to 2; n represents 0 to 10 as an average value; and a plurality of groups R1, R2, R3, k, or m present in the formula may be the same or different from each other.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: October 3, 2017
    Assignees: Shin-Etsu Chemical Co., Ltd., Nippon Kayaku Kabushiki Kaisha
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki, Masataka Nakanishi, Kenichi Kuboki
  • Publication number: 20170267703
    Abstract: A polyorganosiloxane resin represented by the following general formula (5): (R3SiO1/2)l?(R2SiO2/2)m?(RSiO3/2)n?(SiO4/2)o? (5) wherein R is, independently of each other, a hydrogen atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom; l?, m? and o? are, independently of each other, an integer of from 0 to 10,000; n? is an integer of from 1 to 10,000; a total of l?, m? and n? is from 2 to 30,000; and at least one R is a hydrogen atom and at least one R is an —OX group in the molecule, wherein X is an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; and at least one hydrogen atom and at least one —OX group bond to one and the same silicon atom.
    Type: Application
    Filed: May 12, 2017
    Publication date: September 21, 2017
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayuki KUSUNOKI, Tsutomu KASHIWAGI
  • Patent number: 9751901
    Abstract: A polyorganosiloxane resin represented by the following general formula (5): (R3SiO1/2)1?(R2SiO2/2)m?(RSiO3/2)n?(SiO4/2)o? (5) wherein R is, independently of each other, a hydrogen atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom; l?, m? and o? are, independently of each other, an integer of from 0 to 10,000; n? is an integer of from 1 to 10,000; a total of l?, m? and n? is from 2 to 30,000; and at least one R is a hydrogen atom and at least one R is an —OX group in the molecule, wherein X is an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; and at least one hydrogen atom and at least one —OX group bond to one and the same silicon atom.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: September 5, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayuki Kusunoki, Tsutomu Kashiwagi
  • Patent number: 9657175
    Abstract: A silicone resin composition for sealing an optical semiconductor element includes (A) (A-1) an organopolysiloxane having a resin structure which contains at least two alkenyl groups in one molecule, the alkenyl groups being present at 10 to 70 mol % of the total substituent groups bonded to silicon atoms, (B) an organopolysiloxane oligomer having at least two alkenyl groups in one molecule and 2 to 5 silicon atoms, (C) an organohydrogenpolysiloxane which contains at least one hydrosilyl group and may have an alkoxy group or hydroxyl group in one molecule, and (D) an addition reaction catalyst, and is capable of providing a transparent cured product.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: May 23, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tsutomu Kashiwagi, Takayuki Kusunoki, Tomoyuki Mizunashi
  • Patent number: 9660157
    Abstract: An addition-curable silicone resin composition includes (A-1) a linear organopolysiloxane having at least two alkenyl groups per molecule, (A-2) a terminal alkenyl group-containing branched organopolysiloxane having at least two alkenyl groups per molecule, (B) an organohydrogenpolysiloxane with a content of low-molecular-weight siloxane having a degree of polymerization of up to 10 and one or more terminal SiH group per molecule of 5 wt % or less, and (C) an addition reaction catalyst. The composition can be cured to form a product which, when used as a die attach material for optical semiconductor devices, minimizes contamination of the gold electrode pads on LED chips and imparts a good wire bondability.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: May 23, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tatsuya Yamazaki, Tsutomu Kashiwagi, Miyuki Wakao
  • Publication number: 20170107322
    Abstract: A silicone-modified epoxy resin which yields a cured product having low gas permeability and excellent strength; a composition of the silicone-modified epoxy resin; and an epoxy resin cured product obtainable by curing the composition, are provided. An epoxy resin represented by the following Formula (1): wherein R1 represents a hydrocarbon group having 1 to 6 carbon atoms; X represents an organic group having a norbornane epoxy structure, or a hydrocarbon group having 1 to 6 carbon atoms; n represents an integer from 1 to 3; plural R1s and plural Xs present in the formula may be respectively identical or different; and two or more of plural Xs represent an organic group having a norbornane epoxy structure.
    Type: Application
    Filed: March 25, 2015
    Publication date: April 20, 2017
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki, Naosuke Taniguchi
  • Publication number: 20170088566
    Abstract: A polyorganosiloxane resin represented by the following general formula (5): (R3SiO1/2)1?(R2SiO2/2)m?(RSiO3/2)n?(SiO4/2)o? (5) wherein R is, independently of each other, a hydrogen atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, and optionally having an oxygen, halogen, nitrogen or sulfur atom; 1?, m? and o? are, independently of each other, an integer of from 0 to 10,000; n? is an integer of from 1 to 10,000; a total of 1?, m? and n? is from 2 to 30,000; and at least one R is a hydrogen atom and at least one R is an —OX group in the molecule, wherein X is an alkyl group having 1 to 10 carbon atoms or an alkoxyalkyl group having 2 to 10 carbon atoms; and at least one hydrogen atom and at least one —OX group bond to one and the same silicon atom.
    Type: Application
    Filed: December 13, 2016
    Publication date: March 30, 2017
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayuki KUSUNOKI, Tsutomu KASHIWAGI
  • Publication number: 20170073457
    Abstract: The purpose of the present invention is to provide a silicone-modified epoxy resin which produces a cured product having excellent low gas permeability and strength; a composition of the resin; and an epoxy resin cured product obtainable by curing the composition. Disclosed is an epoxy resin represented by the following Formula (1): wherein R1 independently represents a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms; R2 independently represents a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms; R3 independently represents a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms; R4 represents an oxygen atom or a divalent hydrocarbon group having an aliphatic cyclic structure; R5 represents silicone chain having a norbornane epoxy structure at either end; and X represents an organic group having a norbornane epoxy group.
    Type: Application
    Filed: February 18, 2015
    Publication date: March 16, 2017
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki, Naosuke Taniguchi
  • Patent number: 9587075
    Abstract: The invention provides an addition-curable silicone composition which provides a cured product having good performance at a low temperature and excellent resistance to a temperature change, and to provide a semiconductor device having a high reliability, whose semiconductor element is encapsulated with the cured product. The invention provides an addition-curable silicone composition comprising (A) a branched organopolysiloxane having at least two alkenyl groups and represented by the formula (1) with a short branch consisting of 1 to 4 siloxane units, (B) an organohydrogenpolysiloxane having at least two hydrosilyl groups, in an amount such that a ratio of the number of the hydrosilyl groups in component (B) to the number of the alkenyl groups in component (A) is 0.4 to 4, and (C) a hydrosilylation catalyst in a catalytic amount. The invention also provides a semiconductor device provided with a cured product obtained by curing the condensation-curable silicone composition.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: March 7, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayuki Kusunoki, Yuusuke Takamizawa, Tsutomu Kashiwagi