Patents by Inventor Isao Ichikawa

Isao Ichikawa 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: 11948865
    Abstract: A film-shaped firing material (1) is provided, including first metal particles (10), second metal particles (20), and a binder component (30), in which the average particle diameter of the first metal particles (10) is 100 nm or less, and the maximum particle diameter thereof is 250 nm or less, the average particle diameter of the second metal particles (20) is in a range of 1000 to 7000 nm, the minimum particle diameter thereof is greater than 250 nm, and the maximum particle diameter thereof is 10000 nm or less, and the mass ratio of the first metal particles to the second metal particles is 0.1 or greater.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: April 2, 2024
    Assignee: LINTEC CORPORATION
    Inventors: Takeshi Mori, Isao Ichikawa, Hidekazu Nakayama
  • Patent number: 11707787
    Abstract: This film-shaped firing material is a film-shaped firing material containing sinterable metal particles and a binder component, in which, when the average thickness of the portion of the film-shaped firing material excluding the edge portion is deemed 100%, the average thickness of the edge portion of the film-shaped firing material is at least 5% thicker than the average thickness of the portion of the film-shaped firing material excluding the edge portion.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: July 25, 2023
    Assignee: LINTEC Corporation
    Inventor: Isao Ichikawa
  • Publication number: 20230018086
    Abstract: The present invention relates to a film-shaped firing material (1) which contains: sinterable metal particles (10); a binder component (20) that is a solid at room temperature; and a liquid component (30) that is a liquid at room temperature, the liquid component having a boiling point from 300 to 450° C.
    Type: Application
    Filed: November 20, 2020
    Publication date: January 19, 2023
    Inventors: Hidekazu NAKAYAMA, Isao ICHIKAWA, Yosuke SATO
  • Publication number: 20220293555
    Abstract: A method of manufacturing a laminate, the method including: providing a film-form firing material on a support sheet, the film-form firing material containing a sinterable metal particle and a binder component and having an identical or substantially identical shape and an identical size to a shape and size of a semiconductor chip; applying, to a substrate, the film-form firing material on the support sheet; peeling off the support sheet from the substrate and the film-form firing material; applying a back surface side of the semiconductor chip to the film-form firing material on the substrate to face each other; and sinter-bonding the semiconductor chip and the substrate by heating the film-form firing material to 200° C. or higher.
    Type: Application
    Filed: August 20, 2020
    Publication date: September 15, 2022
    Inventors: Isao ICHIKAWA, Hidekazu NAKAYAMA, Yosuke SATO
  • Publication number: 20220293554
    Abstract: A method of manufacturing a laminate, the method including: providing a film-form firing material on a support sheet, the film-form firing material containing a sinterable metal particle and a binder component and having an identical or substantially identical shape and an identical size to a shape and size of a semiconductor chip; applying a back surface side of the semiconductor chip to the film-form firing material on the support sheet to face each other; peeling off the film-form firing material and the semiconductor chip from the support sheet; applying, to a substrate, a film-form firing material side of the semiconductor chip to which the film-form firing material has been applied; and heating the film-form firing material to 200° C. or higher to sinter-bond the semiconductor chip and the substrate.
    Type: Application
    Filed: August 20, 2020
    Publication date: September 15, 2022
    Inventors: Isao ICHIKAWA, Hidekazu NAKAYAMA, Yosuke SATO
  • Patent number: 11420255
    Abstract: A film-shaped firing material 1 is provided, including sinterable metal particles 10 and a binder component 20, in which a content of the sinterable metal particles 10 is in a range of 15% to 98% by mass, a content of the binder component 20 is in a range of 2% to 50% by mass, a shrinkage factor in a planar direction of the film-shaped firing material after being pressurized and fired under conditions of a temperature of 350° C. and a pressure of 10 MPa for 3 minutes is 10% or less with respect to the shrinkage factor before the firing, and a volume shrinkage factor thereof is in a range of 15% to 90% with respect to the volume shrinkage factor before the firing, and a contact ratio of the film-shaped firing material with an adherend after being pressurized and fired under conditions of a temperature of 350° C. and a pressure of 10 MPa for 3 minutes in a state in which the film-shaped firing material is in contact with the adherend is 90% or greater with respect to a contact area of the adherend.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: August 23, 2022
    Assignee: LINTEC Corporation
    Inventors: Isao Ichikawa, Hidekazu Nakayama
  • Patent number: 11285536
    Abstract: A film-shaped fired material of the present invention is a film-shaped fired material 1 which contains sinterable metal particles 10 and a binder component 20, in which a time (A1) after the start of a temperature increase, at which a negative gradient is the highest, in a thermogravimetric curve (TG curve) measured from 40° C. to 600° C. at a temperature-rising-rate of 10° C./min in an air atmosphere and a maximum peak time (B1) in a time range of 0 seconds to 2160 seconds after the start of a temperature increase in a differential thermal analysis curve (DTA curve) measured from 40° C. to 600° C. at a temperature-rising-rate of 10° C./min in an air atmosphere using alumina particles as a reference sample satisfy a relationship of “A1<B1<A1+200 seconds” and a relationship of “A1<2000 seconds”.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: March 29, 2022
    Assignee: LINTEC Corporation
    Inventors: Isao Ichikawa, Hidekazu Nakayama
  • Patent number: 11267992
    Abstract: The present invention provides a film-shaped firing material 1 including sinterable metal particles 10, and a binder component 20, in which a content of the sinterable metal particles 10 is in a range of 15% to 98% by mass, a content of the binder component 20 is in a range of 2% to 50% by mass, a tensile elasticity of the film-shaped firing material at 60° C. is in a range of 4.0 to 10.0 MPa, and a breaking elongation thereof at 60° C. is 500% or greater; and a film-shaped firing material with a support sheet including the film-shaped firing material 1 which contains sinterable metal particles and a binder component, and a support sheet 2 which is provided on at least one side of the film-shaped firing material, in which an adhesive force (a2) of the film-shaped firing material to the support sheet is smaller than an adhesive force (a1) of the film-shaped firing material to a semiconductor wafer, the adhesive force (a1) is 0.1 N/25 mm or greater, and the adhesive force (a2) is in a range of 0.1 N/25 mm to 0.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: March 8, 2022
    Assignee: LINTEC Corporation
    Inventors: Isao Ichikawa, Hidekazu Nakayama, Akinori Sato
  • Patent number: 11219946
    Abstract: The present invention provides a film-shaped firing composition with excellent printability, a method of producing a film-shaped firing material obtained by using the firing material composition, and a method of producing a film-shaped firing material with a support sheet. A paste-like firing material composition is provided, including sinterable metal particles (10), a binder component (20), and a solvent having a relative evaporation rate of 4.0 or less with respect to butyl acetate, in which a content of the solvent is in a range of 12% to 50% by mass with respect to a total mass of the firing material composition.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: January 11, 2022
    Assignee: LINTEC CORPORATION
    Inventors: Takeshi Mori, Hidekazu Nakayama, Isao Ichikawa, Yukiharu Nose
  • Publication number: 20210121959
    Abstract: This film-shaped firing material is a film-shaped firing material containing sinterable metal particles and a binder component, in which, when the average thickness of the portion of the film-shaped firing material excluding the edge portion is deemed 100%, the average thickness of the edge portion of the film-shaped firing material is at least 5% thicker than the average thickness of the portion of the film-shaped firing material excluding the edge portion.
    Type: Application
    Filed: February 13, 2018
    Publication date: April 29, 2021
    Inventor: Isao ICHIKAWA
  • Publication number: 20210078080
    Abstract: A film-shaped firing material (1) is provided, including first metal particles (10), second metal particles (20), and a binder component (30), in which the average particle diameter of the first metal particles (10) is 100 nm or less, and the maximum particle diameter thereof is 250 nm or less, the average particle diameter of the second metal particles (20) is in a range of 1000 to 7000 nm, the minimum particle diameter thereof is greater than 250 nm, and the maximum particle diameter thereof is 10000 nm or less, and the mass ratio of the first metal particles to the second metal particles is 0.1 or greater.
    Type: Application
    Filed: February 8, 2019
    Publication date: March 18, 2021
    Inventors: Takeshi MORI, Isao ICHIKAWA, Hidekazu NAKAYAMA
  • Publication number: 20200376549
    Abstract: A film-shaped fired material of the present invention is a film-shaped fired material 1 which contains sinterable metal particles 10 and a binder component 20, in which a time (A1) after the start of a temperature increase, at which a negative gradient is the highest, in a thermogravimetric curve (TG curve) measured from 40° C. to 600° C. at a temperature-rising-rate of 10° C./min in an air atmosphere and a maximum peak time (B1) in a time range of 0 seconds to 2160 seconds after the start of a temperature increase in a differential thermal analysis curve (DTA curve) measured from 40° C. to 600° C. at a temperature-rising-rate of 10° C./min in an air atmosphere using alumina particles as a reference sample satisfy a relationship of “A1<B1<A1+200 seconds” and a relationship of “A1<2000 seconds”.
    Type: Application
    Filed: March 15, 2018
    Publication date: December 3, 2020
    Inventors: Isao ICHIKAWA, Hidekazu NAKAYAMA
  • Publication number: 20200276645
    Abstract: A film-shaped firing material 1 is provided, including sinterable metal particles 10 and a binder component 20, in which a content of the sinterable metal particles 10 is in a range of 15% to 98% by mass, a content of the binder component 20 is in a range of 2% to 50% by mass, a shrinkage factor in a planar direction of the film-shaped firing material after being pressurized and fired under conditions of a temperature of 350° C. and a pressure of 10 MPa for 3 minutes is 10% or less with respect to the shrinkage factor before the firing, and a volume shrinkage factor thereof is in a range of 15% to 90% with respect to the volume shrinkage factor before the firing, and a contact ratio of the film-shaped firing material with an adherend after being pressurized and fired under conditions of a temperature of 350° C. and a pressure of 10 MPa for 3 minutes in a state in which the film-shaped firing material is in contact with the adherend is 90% or greater with respect to a contact area of the adherend.
    Type: Application
    Filed: September 3, 2018
    Publication date: September 3, 2020
    Inventors: Isao ICHIKAWA, Hidekazu NAKAYAMA
  • Publication number: 20200277515
    Abstract: The present invention provides a film-shaped firing material 1 including sinterable metal particles 10, and a binder component 20, in which a content of the sinterable metal particles 10 is in a range of 15% to 98% by mass, a content of the binder component 20 is in a range of 2% to 50% by mass, a tensile elasticity of the film-shaped firing material at 60° C. is in a range of 4.0 to 10.0 MPa, and a breaking elongation thereof at 60° C. is 500% or greater; and a film-shaped firing material with a support sheet including the film-shaped firing material 1 which contains sinterable metal particles and a binder component, and a support sheet 2 which is provided on at least one side of the film-shaped firing material, in which an adhesive force (a2) of the film-shaped firing material to the support sheet is smaller than an adhesive force (a1) of the film-shaped firing material to a semiconductor wafer, the adhesive force (a1) is 0.1 N/25 mm or greater, and the adhesive force (a2) is in a range of 0.1 N/25 mm to 0.
    Type: Application
    Filed: September 4, 2018
    Publication date: September 3, 2020
    Inventors: Isao ICHIKAWA, Hidekazu NAKAYAMA, Akinori SATO
  • Publication number: 20200273596
    Abstract: The present invention provides a film-shaped firing composition with excellent printability, a method of producing a film-shaped firing material obtained by using the firing material composition, and a method of producing a film-shaped firing material with a support sheet. A paste-like firing material composition is provided, including sinterable metal particles (10), a binder component (20), and a solvent having a relative evaporation rate of 4.0 or less with respect to butyl acetate, in which a content of the solvent is in a range of 12% to 50% by mass with respect to a total mass of the firing material composition.
    Type: Application
    Filed: September 28, 2018
    Publication date: August 27, 2020
    Inventors: Takeshi MORI, Hidekazu NAKAYAMA, Isao ICHIKAWA, Yukiharu NOSE
  • Patent number: 10131824
    Abstract: An adhesive composition includes an acrylic polymer (A) having a weight-average molecular weight (Mw) of 350,000 or higher obtained by polymerizing an acrylic monomer by living radical polymerization using an organotellurium-containing compound as the polymerization initiator, an epoxy thermosetting resin (B), and a thermosetting agent (C). The adhesive composition is capable of joining with sufficient adhesive strength and capable of achieving high package reliability in a semiconductor device.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: November 20, 2018
    Assignee: LINTEC Corporation
    Inventors: Sayaka Tsuchiyama, Isao Ichikawa
  • Patent number: 9562179
    Abstract: An adhesive composition is described, which includes an acrylic polymer, an epoxy thermosetting resin having an unsaturated hydrocarbon group, and a thermosetting agent. The adhesive composition achieves high reliability in a package in which a semiconductor chip of reduced thickness is mounted even when exposed to severe reflow conditions. An adhesive sheet having an adhesive layer that includes the above adhesive composition is also described.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: February 7, 2017
    Assignee: Lintec Corporation
    Inventors: Naoya Saiki, Isao Ichikawa, Hironori Shizuhata, Osamu Yamazaki
  • Patent number: 9434865
    Abstract: An adhesive composition includes an acrylic polymer (A), a heat curable resin (B) having unsaturated hydrocarbon group, and a coupling agent (C) having reactive a double bond group.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 6, 2016
    Assignee: LINTEC Corporation
    Inventors: Sayaka Tsuchiyama, Isao Ichikawa
  • Patent number: 9382455
    Abstract: An adhesive composition includes an acrylic polymer (A), a heat curable resin (B) having unsaturated hydrocarbon group, and a filler (C) having reactive double bond on a surface.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 5, 2016
    Assignee: LINTEC Corporation
    Inventors: Sayaka Tsuchiyama, Isao Ichikawa
  • Publication number: 20160160094
    Abstract: An adhesive composition includes an acrylic polymer (A) having a weight-average molecular weight (Mw) of 350,000 or higher obtained by polymerizing an acrylic monomer by living radical polymerization using an organotellurium-containing compound as the polymerization initiator, an epoxy thermosetting resin (B), and a thermosetting agent (C). The adhesive composition is capable of joining with sufficient adhesive strength and capable of achieving high package reliability in a semiconductor device.
    Type: Application
    Filed: August 1, 2014
    Publication date: June 9, 2016
    Inventors: Sayaka Tsuchiyama, Isao IChikawa