Patents by Inventor Yohei Hamade

Yohei Hamade 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: 9273187
    Abstract: Provided is an ink jet recording head, including a member provided with an ejection orifice for ejecting ink, in which the ink jet recording head further includes a water-repellent layer including a cured product of a condensed product obtained by condensation of a hydrolyzable silane compound having an epoxy group and a hydrolyzable silane compound having a perfluoropolyether group on a surface of the member on a side on which the ejection orifice opens.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: March 1, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Etsuko Sawada, Hiroaki Mihara, Ken Ikegame, Satoshi Tsutsui, Yohei Hamade
  • Publication number: 20160054655
    Abstract: In at least one embodiment of a method for forming a pattern having a hollow structure, a light-absorbing layer capable of absorbing light is formed on a surface of a photosensitive resin film. Subsequently, a substrate having a protrusion and the photosensitive resin film are bonded together so that the protrusion and the light-absorbing layer come into contact with each other. Then, the photosensitive resin film and the light-absorbing layer are patterned at one time by photolithography.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 25, 2016
    Inventors: Yohei Hamade, Shoji Shiba
  • Publication number: 20160052270
    Abstract: In an inkjet recording head comprising a substrate including an energy-generating element that generates energy for ejecting a liquid, an ejection port for ejecting the liquid, and a liquid flow passage communicating with the ejection port, a liquid-repellent layer is formed on a surface of a member for forming the ejection port, and a liquid-repellent region and a liquid-nonrepellent region are formed on the same surface of the liquid-repellent layer by irradiating a part of the liquid-repellent layer with light including a wavelength decomposing the liquid-repellent component in the liquid-repellent layer.
    Type: Application
    Filed: August 18, 2015
    Publication date: February 25, 2016
    Inventors: Satoshi Tsutsui, Yohei Hamade
  • Patent number: 9150697
    Abstract: Provided is an ink jet recording head, including a member provided with an ejection orifice for ejecting ink, in which the ink jet recording head further includes a water-repellent layer including a cured product of a condensed product obtained by condensation of a hydrolyzable silane compound having an epoxy group and a hydrolyzable silane compound having a perfluoropolyether group on a surface of the member on a side on which the ejection orifice opens.
    Type: Grant
    Filed: April 17, 2013
    Date of Patent: October 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Etsuko Sawada, Hiroaki Mihara, Ken Ikegame, Satoshi Tsutsui, Yohei Hamade
  • Publication number: 20150251419
    Abstract: Provided is an ink jet recording head, including a member provided with an ejection orifice for ejecting ink, in which the ink jet recording head further includes a water-repellent layer including a cured product of a condensed product obtained by condensation of a hydrolyzable silane compound having an epoxy group and a hydrolyzable silane compound having a perfluoropolyether group on a surface of the member on a side on which the ejection orifice opens.
    Type: Application
    Filed: May 22, 2015
    Publication date: September 10, 2015
    Inventors: Etsuko Sawada, Hiroaki Mihara, Ken Ikegame, Satoshi Tsutsui, Yohei Hamade
  • Patent number: 9044944
    Abstract: A liquid discharge head includes a substrate including an energy generating element that generates energy used to discharge liquid and a discharge port member having a discharge port surface with a discharge port line including discharge ports, through which the liquid is discharged, arrayed in a first direction. The discharge port surface includes a groove portion disposed between the discharge port line and a first end of the discharge port member in a second direction intersecting the first direction. The groove portion extends along the discharge port line. The discharge port surface further includes an inclined surface disposed between an end of the discharge port line and a second end of the discharge port member in the first direction. The inclined surface is inclined toward the second end.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: June 2, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Omura, Shuichi Murakami, Toshikazu Nagatsuka, Keiji Tomizawa, Etsuko Sawada, Hiroaki Mihara, Yohei Hamade
  • Patent number: 9029074
    Abstract: Provided is a method of water repellent treatment for a pattern surface, the method including the steps of agitatingly mixing a perfluoropolyether-group-containing silane water repellent, an organic acid, a fluorine-containing solvent capable of dissolving the perfluoropolyether-group-containing silane water repellent and the organic acid, and water to hydrolyze the perfluoropolyether-group-containing silane water repellent, thereby obtaining a partial hydrolysate solution; forming a photosensitive resin layer on a substrate; applying the partial hydrolysate solution onto the photosensitive resin layer to form a water-repellent film; performing patterning exposure to the photosensitive resin layer and the water-repellent film; performing heat treatment to collectively cure an exposed portion of the photosensitive resin layer and the water-repellent film; and removing a non-exposed portion of the photosensitive resin layer and the water-repellent film by development treatment to form a pattern.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yohei Hamade, Etsuko Sawada, Ken Ikegame, Hiroaki Mihara, Satoshi Tsutsui
  • Publication number: 20150116427
    Abstract: Provided is a sealant for use in ink jet recording heads, comprising a cationically polymerizable resin; a fluorine-containing compound that is liquid at a temperature in a range of 20° C.±15° C.; and a cationic polymerization initiator.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 30, 2015
    Inventors: Satoshi Tsutsui, Etsuko Sawada, Yohei Hamade
  • Patent number: 9004630
    Abstract: There is provided an inkjet printing apparatus which can perform stable ejection also in successive printing at high speed even in a case of performing printing in use of a print head provided with an ejection opening surface having hydrophilic properties. The inkjet printing apparatus comprises an inkjet print head wherein the control unit controls the print head such that, in a case where the ejection number of the ink ejected from the print head after removing the ink on the ejection opening surface by the ink removal unit is equal to or more than a threshold, a drive energy amount that is supplied for the preliminary ejection operation is larger than a drive energy amount that is supplied for the preliminary ejection operation in a case where the ejection number is less than the threshold.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshikazu Nagatsuka, Shuichi Murakami, Keiji Tomizawa, Atsushi Omura, Etsuko Sawada, Hiroaki Mihara, Yohei Hamade
  • Publication number: 20150077470
    Abstract: Provided is an ink jet recording head, including a member provided with an ejection orifice for ejecting ink, in which the ink jet recording head further includes a water-repellent layer including a cured product of a condensed product obtained by condensation of a hydrolyzable silane compound having an epoxy group and a hydrolyzable silane compound having a perfluoropolyether group on a surface of the member on a side on which the ejection orifice opens.
    Type: Application
    Filed: April 17, 2013
    Publication date: March 19, 2015
    Inventors: Etsuko Sawada, Hiroaki Mihara, Ken Ikegame, Satoshi Tsutsui, Yohei Hamade
  • Publication number: 20150062249
    Abstract: Provided is a liquid discharge head comprising a discharge port-forming member having discharge ports for discharging a liquid and having a surface provided with a liquid-repellent film. The liquid-repellent film includes a layer containing a resin composition containing at least one of polyurethane and polyrotaxane disposed on the discharge port-forming member and a layer containing a fluorine compound and having a thickness of 10 nm or less disposed on the resin composition-containing layer. When a scratch-forming tool, a diamond tip having a tip diameter of 15 ?m, is pressed onto the liquid-repellent film with a load of 0.098 N (10 gf) and is reciprocated ten times, the depth of a scratch formed on the surface of the liquid-repellent film is smaller than the thickness of the fluorine compound-containing layer.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 5, 2015
    Inventors: Yohei Hamade, Etsuko Sawada, Satoshi Tsutsui
  • Patent number: 8957151
    Abstract: Provided are a liquid-repellent film in which the aggregation of a liquid-repellent material is suppressed and which is excellent in liquid-repellent properties and a production method therefor, and a fine structure using the liquid-repellent film and a production method therefor. The liquid-repellent film is a liquid-repellent film formed of a silane compound having a specific perfluoropolyether group and a fluorine-containing acrylic homopolymer.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Tsutsui, Etsuko Sawada, Hiroaki Mihara, Yohei Hamade
  • Publication number: 20140311661
    Abstract: A process for producing a liquid ejection head having a substrate and an ejection orifice forming member having an ejection orifice for ejecting liquid, including forming, on the substrate, a photocationically polymerizable resin layer which includes a photocationically polymerizable resin material and becomes the ejection orifice forming member; laminating, on the uncured photocationically polymerizable resin layer, a layer containing a condensation product of a hydrolyzable silane compound having a cationically polymerizable epoxy group and a hydrolyzable silane compound having a fluorine-containing group; laminating a water-repellent layer including a hydrolyzable silane compound having a perfluoropolyether group on the condensation-product-containing layer; subjecting the photocationically polymerizable resin layer, condensation-product-containing layer, and water-repellent layer to pattern exposure; collectively curing exposed portions of the photocationically polymerizable resin layer, condensation-prod
    Type: Application
    Filed: April 1, 2014
    Publication date: October 23, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Tsutsui, Etsuko Sawada, Ken Ikegame, Hiroaki Mihara, Yohei Hamade
  • Publication number: 20140307028
    Abstract: A liquid discharge head includes a substrate including an energy generating element that generates energy used to discharge liquid and a discharge port member having a discharge port surface with a discharge port line including discharge ports, through which the liquid is discharged, arrayed in a first direction. The discharge port surface includes a groove portion disposed between the discharge port line and a first end of the discharge port member in a second direction intersecting the first direction. The groove portion extends along the discharge port line. The discharge port surface further includes an inclined surface disposed between an end of the discharge port line and a second end of the discharge port member in the first direction. The inclined surface is inclined toward the second end.
    Type: Application
    Filed: April 14, 2014
    Publication date: October 16, 2014
    Inventors: Atsushi Omura, Shuichi Murakami, Toshikazu Nagatsuka, Keiji Tomizawa, Etsuko Sawada, Hiroaki Mihara, Yohei Hamade
  • Publication number: 20140309329
    Abstract: Provided is a water-repellent antifouling coating material including a condensation product obtained by condensing hydrolyzable silane compounds. The hydrolyzable silane compounds include (a) a hydrolyzable silane compound having a perfluoropolyether group; (b) a hydrolyzable silane compound having an epoxy group; and (c) a hydrolyzable silane compound having a fluorine-containing group other than perfluoropolyether groups.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 16, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Etsuko Sawada, Satoshi Tsutsui, Yohei Hamade, Hiroaki Mihara, Ken Ikegame
  • Publication number: 20140272725
    Abstract: Provided is a method of water repellent treatment for a pattern surface, the method including the steps of agitatingly mixing a perfluoropolyether-group-containing silane water repellent, an organic acid, a fluorine-containing solvent capable of dissolving the perfluoropolyether-group-containing silane water repellent and the organic acid, and water to hydrolyze the perfluoropolyether-group-containing silane water repellent, thereby obtaining a partial hydrolysate solution; forming a photosensitive resin layer on a substrate; applying the partial hydrolysate solution onto the photosensitive resin layer to form a water-repellent film; performing patterning exposure to the photosensitive resin layer and the water-repellent film; performing heat treatment to collectively cure an exposed portion of the photosensitive resin layer and the water-repellent film; and removing a non-exposed portion of the photosensitive resin layer and the water-repellent film by development treatment to form a pattern.
    Type: Application
    Filed: February 25, 2014
    Publication date: September 18, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yohei Hamade, Etsuko Sawada, Ken Ikegame, Hiroaki Mihara, Satoshi Tsutsui
  • Patent number: 8622516
    Abstract: Provided is an ink jet recording head, including multiple ejection orifices for ejecting droplets to a recording medium, in which a normal of a plane formed of the following straight lines is tilted with respect to an axis line of each of the ejection orifices: a straight line obtained by connecting points, which are positioned on peripheries of the respective ejection orifices and are at shortest distances from a face plane, in a longitudinal direction of an ejection orifice array; and a straight line obtained by connecting points, which are positioned on the peripheries of the respective ejection orifices and are at longest distances from the face plane, in the longitudinal direction of the ejection orifice array.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: January 7, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yohei Hamade
  • Publication number: 20130307889
    Abstract: There is provided an inkjet printing apparatus which can perform stable ejection also in successive printing at high speed even in a case of performing printing in use of a print head provided with an ejection opening surface having hydrophilic properties. The inkjet printing apparatus comprises an inkjet print head wherein the control unit controls the print head such that, in a case where the ejection number of the ink ejected from the print head after removing the ink on the ejection opening surface by the ink removal unit is equal to or more than a threshold, a drive energy amount that is supplied for the preliminary ejection operation is larger than a drive energy amount that is supplied for the preliminary ejection operation in a case where the ejection number is less than the threshold.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 21, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Toshikazu Nagatsuka, Shuichi Murakami, Keiji Tomizawa, Atsushi Omura, Etsuko Sawada, Hiroaki Mihara, Yohei Hamade
  • Patent number: 8343712
    Abstract: A method for manufacturing an inkjet recording includes forming a photo-cationic polymerizable resin layer containing a photo-cationic polymerizable resin material on a substrate; performing pattern exposure of the photo-cationic polymerizable resin layer to form a latent image of a fine pattern including an ejection port; forming a water repellent layer containing a water repellent material capable of forming a bond in reaction with the photo-cationic polymerizable resin material on the photo-cationic polymerizable resin layer; developing the photo-cationic polymerizable resin layer to thereby remove a non-exposed portion of the photo-cationic polymerizable resin layer and remove a water repellent layer portion corresponding to the non-exposed portion to thereby form the fine pattern; and curing the photo-cationic polymerizable resin layer by heat treatment to form a member provided with the fine pattern and promote a reaction of the photo-cationic polymerizable resin material and the water repellent materia
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yohei Hamade, Etsuko Sawada, Hiroaki Mihara, Satoshi Tsutsui
  • Publication number: 20120107746
    Abstract: A method for manufacturing an inkjet recording includes forming a photo-cationic polymerizable resin layer containing a photo-cationic polymerizable resin material on a substrate; performing pattern exposure of the photo-cationic polymerizable resin layer to form a latent image of a fine pattern including an ejection port; forming a water repellent layer containing a water repellent material capable of forming a bond in reaction with the photo-cationic polymerizable resin material on the photo-cationic polymerizable resin layer; developing the photo-cationic polymerizable resin layer to thereby remove a non-exposed portion of the photo-cationic polymerizable resin layer and remove a water repellent layer portion corresponding to the non-exposed portion to thereby form the fine pattern; and curing the photo-cationic polymerizable resin layer by heat treatment to form a member provided with the fine pattern and promote a reaction of the photo-cationic polymerizable resin material and the water repellent materia
    Type: Application
    Filed: October 24, 2011
    Publication date: May 3, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yohei Hamade, Etsuko Sawada, Hiroaki Mihara, Satoshi Tsutsui