Patents by Inventor Yoshinori Tagawa

Yoshinori Tagawa 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: 20220388307
    Abstract: According to an aspect of the present invention, a liquid discharge head includes a discharge outlet configured to discharge a liquid, wherein a division member dividing the discharge outlet into a plurality of regions is formed in the discharge outlet when viewed from a position facing the discharge outlet, wherein, when a direction in which the liquid is discharged from the discharge outlet is a direction upward from bottom, the division member has a first surface and a second surface facing upward, and wherein the second surface is disposed at the bottom lower than the first surface.
    Type: Application
    Filed: August 22, 2022
    Publication date: December 8, 2022
    Inventors: Yasunori Takei, Yoshinori Tagawa
  • Patent number: 10274826
    Abstract: A method for imparting water repellency to a surface of a member includes a step in which a material including a compound containing a fluorine atom is deposited on a surface of a photosensitive resin layer in order to form a member including a material layer; a first exposure step in which the member is exposed to an amount of light with an exposure apparatus in order to form a latent image in the member; a development step in which the member including the latent image is developed; and a second exposure step in which the member is exposed to an amount of light with an exposure apparatus subsequent to the development step.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 30, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Nagai, Yoshinori Tagawa, Shingo Nagata, Hiroyuki Murayama, Shuhei Oya, Makoto Watanabe
  • Patent number: 10241410
    Abstract: A method for imparting water repellency to a surface of a member includes a step in which a material including a compound containing a fluorine atom is deposited on a surface of a photosensitive resin layer in order to form a member including a material layer; a first exposure step in which the member is exposed to an amount of light with an exposure apparatus in order to form a latent image in the member; a development step in which the member including the latent image is developed; and a second exposure step in which the member is exposed to an amount of light with an exposure apparatus subsequent to the development step.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: March 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Nagai, Yoshinori Tagawa, Shingo Nagata, Hiroyuki Murayama, Shuhei Oya, Makoto Watanabe
  • Publication number: 20180326723
    Abstract: The present invention provides a liquid ejecting head in which a chip crack is unlikely to occur. To achieve this, a liquid ejecting head includes an element substrate having energy generating elements arranged on the front face of the element substrate in its longitudinal direction and a channel member having ejection ports formed to correspond to the energy generating elements, respectively. In the element substrate, a supply port for supplying liquid is formed so as to pierce through from a back face to a front face of the element substrate, and inside the supply port, a beam is formed at a position closer to an end of the supply port rather than a center thereof in its longitudinal direction to connect facing inner walls of the supply port in its lateral direction.
    Type: Application
    Filed: May 1, 2018
    Publication date: November 15, 2018
    Inventors: Takanobu Manabe, Kenji Fujii, Hirohisa Fujita, Keisuke Kishimoto, Yoshinori Tagawa, Hideo Saikawa, Yasushi Iijima, Kenji Yabe, Kyosuke Toda, Yosuke Takagi, Hiroyuki Murayama
  • Patent number: 9555632
    Abstract: Performed are a non-through hole forming step of partitioning a supply path forming region of a second surface into a first region corresponding to a forming position of a beam, a second region located adjacent to the first region on both sides thereof, and a third region that is none of the first region and the second region, and forming a plurality of non-through holes in the second region and the third region, and an etching step of subjecting a silicon substrate to anisotropic etching from the second surface, to thereby form the supply path and the beam in the supply path. In the non-through hole forming step, at least one of an interval or a depth of the non-through holes is caused to differ in the second region and the third region, to thereby control the shape and dimension of the beam to be formed in the etching step.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: January 31, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Makoto Watanabe, Yoshinori Tagawa, Hiroyuki Murayama, Shuhei Oya, Takanobu Manabe
  • Publication number: 20160375687
    Abstract: Performed are a non-through hole forming step of partitioning a supply path forming region of a second surface into a first region corresponding to a forming position of a beam, a second region located adjacent to the first region on both sides thereof, and a third region that is none of the first region and the second region, and forming a plurality of non-through holes in the second region and the third region, and an etching step of subjecting a silicon substrate to anisotropic etching from the second surface, to thereby form the supply path and the beam in the supply path. In the non-through hole forming step, at least one of an interval or a depth of the non-through holes is caused to differ in the second region and the third region, to thereby control the shape and dimension of the beam to be formed in the etching step.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 29, 2016
    Inventors: Makoto Watanabe, Yoshinori Tagawa, Hiroyuki Murayama, Shuhei Oya, Takanobu Manabe
  • Publication number: 20160357106
    Abstract: A method for imparting water repellency to a surface of a member includes a step in which a material including a compound containing a fluorine atom is deposited on a surface of a photosensitive resin layer in order to form a member including a material layer; a first exposure step in which the member is exposed to an amount of light with an exposure apparatus in order to form a latent image in the member; a development step in which the member including the latent image is developed; and a second exposure step in which the member is exposed to an amount of light with an exposure apparatus subsequent to the development step.
    Type: Application
    Filed: June 2, 2016
    Publication date: December 8, 2016
    Inventors: Masataka Nagai, Yoshinori Tagawa, Shingo Nagata, Hiroyuki Murayama, Shuhei Oya, Makoto Watanabe
  • Patent number: 9358786
    Abstract: A recording head having a substrate and a channel forming member configured to form a flow channel, a supply port formed at the substrate so as to penetrate through the substrate, the flow channel communicates with the supply port, and a member formed of an organic material and configured to connect two surfaces forming the supply port and opposing each other with the supply port interposed therebetween.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: June 7, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Watanabe, Yoshinori Tagawa
  • Patent number: 9315026
    Abstract: A method for manufacturing a liquid discharge head. The method includes a first step of forming a telecentric measurement pattern A by exposure, the telecentric measurement pattern A being part of a measurement pattern that allows determination of inclination of a principal ray caused by an off-axis telecentric degree occurring in a projection exposing device, and a second step of forming a telecentric measurement pattern B by exposure under an exposure condition defocused from an exposure condition in the first step, the telecentric measurement pattern B being another part of the measurement pattern, which allows the determination of the inclination of the principal ray caused by the off-axis telecentric degree occurring in the projection exposing device. The off-axis telecentric degree is determined from an amount of misalignment between relative forming positions of the telecentric measurement patterns A and B and an amount of defocusing.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: April 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takanobu Manabe, Yoshinori Tagawa, Hiroyuki Murayama, Shuhei Oya
  • Publication number: 20160052273
    Abstract: A method for manufacturing a liquid discharge head. The method includes a first step of forming a telecentric measurement pattern A by exposure, the telecentric measurement pattern A being part of a measurement pattern that allows determination of inclination of a principal ray caused by an off-axis telecentric degree occurring in a projection exposing device, and a second step of forming a telecentric measurement pattern B by exposure under an exposure condition defocused from an exposure condition in the first step, the telecentric measurement pattern B being another part of the measurement pattern, which allows the determination of the inclination of the principal ray caused by the off-axis telecentric degree occurring in the projection exposing device. The off-axis telecentric degree is determined from an amount of misalignment between relative forming positions of the telecentric measurement patterns A and B and an amount of defocusing.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 25, 2016
    Inventors: Takanobu Manabe, Yoshinori Tagawa, Hiroyuki Murayama, Shuhei Oya
  • Publication number: 20150328891
    Abstract: A recording head having a substrate and a channel forming member configured to form a flow channel, a supply port formed at the substrate so as to penetrate through the substrate, the flow channel communicates with the supply port, and a member formed of an organic material and configured to connect two surfaces forming the supply port and opposing each other with the supply port interposed therebetween.
    Type: Application
    Filed: May 8, 2015
    Publication date: November 19, 2015
    Inventors: Keiji Watanabe, Yoshinori Tagawa
  • Patent number: 9174439
    Abstract: A liquid ejection head includes a print element board and an electric wiring board electrically connected to a bump of the print element board using an interconnecting wire. The bump has a first surface and a second surface. The height of the second surface from a surface of a base plate is higher than that of the first surface. The first surface has a protrusion formed therein, and the bump is connected to the interconnecting wire in the second surface.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: November 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Ibe, Yoshinori Tagawa, Jun Yamamuro, Hiroto Komiyama, Kouji Hasegawa, Shiro Sujaku
  • Patent number: 9162459
    Abstract: A liquid ejection head includes a substrate which has an energy-generating element that generates energy to be utilized for ejecting a liquid, and a supply orifice for supplying the liquid to the energy-generating element; and an ejection orifice forming member that has a plurality of ejection orifices through which the liquid is ejected, and at least one beam-like projection which projects toward the substrate and extends along an array direction of the ejection orifices at a position corresponding to the supply orifice. A sectional area perpendicular to the array direction of the ejection orifices at the central part of the beam-like projection in the array direction of the ejection orifices is larger than a sectional area in the direction perpendicular to the array direction of the ejection orifices at both ends of the beam-like projection in the array direction.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: October 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Nagai, Yoshinori Tagawa, Jun Yamamuro, Kenji Fujii, Mitsuru Chida, Makoto Watanabe, Toshiaki Kurosu, Takanobu Manabe
  • Patent number: 9132647
    Abstract: An object of the present invention is to provide a liquid ejection head capable of suppressing the capture of bubbles into the liquid ejection head including ejection ports having different opening areas so as to satisfactorily fill a liquid channel and the ejection ports with liquid. In order to achieve the object, the liquid ejection head according to the present invention includes a liquid supply port communicating with a plurality of kinds of ejection ports, and further, a defoaming opening communicating with another ejection port except an ejection port having a large opening area out of the plurality of kinds of ejection ports via a defoaming channel.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: September 15, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shiro Sujaku, Jun Yamamuro, Hiroyuki Murayama, Toshiaki Kurosu, Yoshinori Tagawa
  • Patent number: 9114614
    Abstract: A liquid ejection head has an element substrate constituted of a substrate body having a plurality of energy generating elements for liquid ejection and a nozzle plate having a plurality of ejection ports arranged corresponding to the respective energy generating elements so as to form a plurality of ejection port rows each extending in a first direction, the rows being arranged side by side so as to expand in a second direction intersecting the first direction. The nozzle plate has also a groove section, or a plurality of hollow sections arranged to form a hollow section row, as extending in the first direction, at least between one of the opposite edges as viewed in the second direction of the nozzle plate and the ejection port row arranged close to the same edge.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: August 25, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Nagai, Yoshinori Tagawa, Jun Yamamuro
  • Patent number: 9102149
    Abstract: A liquid ejection head is provided with a recording element substrate having a plurality of ejection orifices for ejecting a liquid, the plurality of ejection orifices being arranged to form a row of the ejection orifices. In at least some of the plurality of the ejection orifices, each having one side and another side, the area of an inner wall of the ejection orifices is set to be larger on the other side than on the one side, the one side and the other side being defined by a plane which passes through the center of the ejection orifice, intersects with the row of the ejection orifices at right angles and extends along the direction of the depth of the ejection orifice.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: August 11, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Nagai, Yoshinori Tagawa, Toshiaki Kurosu, Hiroyuki Murayama, Makoto Watanabe, Takanobu Manabe
  • Patent number: 9079405
    Abstract: A liquid ejection head chip includes a liquid ejection unit having a plurality of ejection orifices for ejecting a liquid, a flow path in communication with the ejection orifices, and an energy generating element that generates energy for ejecting the liquid, the liquid ejection unit being provided on an upper surface formed of a (100) surface of a silicon single-crystal substrate. The side surfaces in at least one of two combinations of opposing side surfaces of the substrate have (111) surfaces of silicon single crystal and the angles of the (111) surfaces relative to the (100) surface are supplementary to each other.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: July 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Kurosu, Hiroto Komiyama, Jun Yamamuro, Yoshinori Tagawa, Takanobu Manabe
  • Patent number: 9023593
    Abstract: Provided is a method of manufacturing a liquid ejection head, including: forming, on a substrate, a flow path mold pattern that becomes a mold of a liquid flow path; forming a negative photosensitive resin layer on the flow path mold pattern; subjecting the negative photosensitive resin layer to exposure processing with use of a reduction projection exposing apparatus and a mask pattern having an ejection orifice mask shape for forming ejection orifices; and subjecting the negative photosensitive resin layer obtained after the exposure processing to development processing to form the ejection orifices, in which the ejection orifices are formed by correcting, by the ejection orifice mask shape, an inclination of an ejection angle due to an off-axis telecentricity caused by the reduction projection exposing apparatus so as to be close to a direction perpendicular to a surface of the substrate.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Watanabe, Yoshinori Tagawa, Hiroyuki Murayama, Toshiaki Kurosu, Masataka Nagai, Takanobu Manabe
  • Publication number: 20150097899
    Abstract: An object of the present invention is to provide a liquid ejection head capable of suppressing the capture of bubbles into the liquid ejection head including ejection ports having different opening areas so as to satisfactorily fill a liquid channel and the ejection ports with liquid. In order to achieve the object, the liquid ejection head according to the present invention includes a liquid supply port communicating with a plurality of kinds of ejection ports, and further, a defoaming opening communicating with another ejection port except an ejection port having a large opening area out of the plurality of kinds of ejection ports via a defoaming channel.
    Type: Application
    Filed: September 24, 2014
    Publication date: April 9, 2015
    Inventors: Shiro SUJAKU, Jun Yamamuro, Hiroyuki Murayama, Toshiaki Kurosu, Yoshinori Tagawa
  • Patent number: 8968584
    Abstract: A method for manufacturing a liquid ejection head includes the steps of: disposing an etching mask layer on a substrate having a first face and a second face that is on an opposite side of the first face, the etching mask layer being disposed on the second face; forming a concave line pattern at a region of the etching mask layer other than a region where an opening for the support port is to be formed; providing an etching opening at the etching mask layer; performing anisotropic etching from a side of the second face using the etching mask layer provided with the etching opening as a mask, thus forming the supply port at the substrate; comparing the line pattern with a recess generated at the substrate, thus selecting a device chip for liquid ejection; and connecting the selected device chip to a liquid supply part.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Yamamuro, Yoshinori Tagawa, Satoshi Ibe, Hiroto Komiyama, Kouji Hasegawa, Shiro Sujaku