Patents by Inventor Yoshio Ozawa

Yoshio Ozawa 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: 20150030978
    Abstract: A magnetic toner for developing an electrostatic latent image of the present disclosure includes toner particles each having a toner core containing a binder resin and a magnetic powder, and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The amount of iron eluted from the toner core (iron concentration in a filtrate) measured by a specified method is 10 mg/L or less.
    Type: Application
    Filed: July 23, 2014
    Publication date: January 29, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Yoshio OZAWA, Toshiki TAKEMORI, Masanori SUGAHARA, Hiroaki MORIYAMA, Masashi TAMAGAKI
  • Patent number: 8941088
    Abstract: A nonvolatile memory device includes: a first conductive layer; a second conductive layer; a first resistance change layer provided between the first conductive layer and the second conductive layer and having an electrical resistance changing with at least one of an applied electric field and a passed current; and a first lateral layer provided on a lateral surface of the first resistance change layer and having an oxygen concentration higher than an oxygen concentration in the first resistance change layer.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: January 27, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kensuke Takano, Yoshio Ozawa, Katsuyuki Sekine, Junichi Wada
  • Publication number: 20150017582
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core and a shell layer. The shell layer contains a resin including a unit derived from a monomer of a thermosetting resin and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. When heat and pressure are applied to a toner layer formed on a polyester film under conditions of a temperature of 140° C. and a pressure of 7 MPa so that the toner particles are not superimposed, the toner particles of the toner layer are broken in a manner that a melt of a component of the toner core flows out from a plurality of points in an outer surface of the shell layer.
    Type: Application
    Filed: July 7, 2014
    Publication date: January 15, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Yoshio OZAWA, Noriaki SAKAMOTO, Hiroaki MORIYAMA, Tomoyuki OGAWA, Takatoshi NOZAKI
  • Publication number: 20150004540
    Abstract: An electrostatic latent image developing toner contains toner particles each including a toner core containing a binder resin, and a shell layer coating the surface of the tore core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The resin contained in the shell layer has a unit derived from one or more monomers of thermosetting resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Yoshio OZAWA, Naruo YABE, Masami TSUJIHIRO, Ryotaro KOMADA
  • Publication number: 20150004537
    Abstract: The present disclosure relates to an electrostatic latent image developing toner containing a toner particle including a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The toner particle contains fine particles in an interfacial portion between the toner core and the shell layer, and the fine particles have a charge property opposite to that of the toner, or have a volume resistivity lower than both a volume resistivity of the binder resin and a volume resistivity of the shell layer.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Yoshio OZAWA, Masami TSUJIHIRO, Toru TAKATSUNA, Ryotaro KOMADA
  • Publication number: 20140374690
    Abstract: A semiconductor element includes a first electrode having at least one convex feature, a second electrode having a concave feature opposed to the convex feature, and a variable resistance layer including an element whose absolute value of standard reaction Gibbs energy for forming oxide is larger than the corresponding value of an element included in the first electrode, and being disposed between the convex feature and the concave feature or on the outer circumference of the convex feature of the first electrode.
    Type: Application
    Filed: June 18, 2014
    Publication date: December 25, 2014
    Inventors: Junichi WADA, Yoshio OZAWA
  • Publication number: 20140357032
    Abstract: On a silicon substrate is formed a stacked body by alternately stacking a plurality of silicon oxide films and silicon films, a trench is formed in the stacked body, an alumina film, a silicon nitride film and a silicon oxide film are formed in this order on an inner surface of the trench, and a channel silicon crystalline film is formed on the silicon oxide film. Next, a silicon oxide layer is formed at an interface between the silicon oxide film and the channel silicon crystalline film by performing thermal treatment in an oxygen gas atmosphere.
    Type: Application
    Filed: August 15, 2014
    Publication date: December 4, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Yoshio OZAWA
  • Publication number: 20140308789
    Abstract: According to one embodiment, a semiconductor memory device with memory cells each composed of a vertical transistor, comprises a silicon layer formed into a columnar shape on a silicon substrate, a gate insulating film part in which a tunnel insulating film, a charge storage layer, and a block insulating film are formed to surround the sidewall surface of the silicon layer, and a stacked structure part formed to surround the sidewall surface of the gate insulating film part and in which a plurality of interlayer insulating films and a plurality of control gate electrode layers are stacked alternately. The silicon layer, gate insulating film part, and control gate electrode layer constitute the vertical transistor. The charge storage layer has a region lower in trap level than a region facing the control gate electrode layer between the vertical transistors.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 16, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsuya Kai, Yoshio Ozawa, Ryota Fujitsuka, Yoshitaka Tsunashima
  • Publication number: 20140284546
    Abstract: According to one embodiment, a memory element includes: a first electrode layer; a second electrode layer; and a memory layer provided between the first electrode layer and the second electrode layer, and the memory layer including a plurality of first oxide layers in a second oxide layer, a resistivity of each of the plurality of first oxide layers being higher than a resistivity of the second oxide layer.
    Type: Application
    Filed: September 10, 2013
    Publication date: September 25, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomotaka ARIGA, Junichi WADA, Kouji MATSUO, Noritake OOMACHI, Yoshio OZAWA
  • Patent number: 8841183
    Abstract: On a silicon substrate is formed a stacked body by alternately stacking a plurality of silicon oxide films and silicon films, a trench is formed in the stacked body, an alumina film, a silicon nitride film and a silicon oxide film are formed in this order on an inner surface of the trench, and a channel silicon crystalline film is formed on the silicon oxide film. Next, a silicon oxide layer is formed at an interface between the silicon oxide film and the channel silicon crystalline film by performing thermal treatment in an oxygen gas atmosphere.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: September 23, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshio Ozawa
  • Publication number: 20140264227
    Abstract: A semiconductor memory includes a plurality of stripe-like active areas formed by stacking, in a direction perpendicular to a substrate, a plurality of layers extending parallel to the substrate, a first gate electrode formed on first side surfaces of the active areas, the first side surfaces being perpendicular to the substrate, a second gate electrode formed on second side surfaces of the active areas, the second side surfaces being perpendicular to the substrate. The layers are patterned in self-alignment with each other, intersections of the active areas and the first gate electrode form a plurality of memory cells, and the plurality of memory cells in an intersecting plane share the first gate electrode.
    Type: Application
    Filed: May 27, 2014
    Publication date: September 18, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masahiro KIYOTOSHI, Akihito YAMAMOTO, Yoshio OZAWA, Fumitaka ARAI, Riichiro SHIROTA
  • Publication number: 20140252453
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device including a semiconductor layer with a main surface, a first insulating layer formed on the main surface of the semiconductor layer, a charge storage layer formed on the first insulating layer, a second insulating layer formed on the charge storage layer, and a control gate electrode formed on the second insulating layer. At least one inelastic scattering film that reduces energy of electrons by scattering is contained in at least one of the charge storage layer and second insulating layer.
    Type: Application
    Filed: May 22, 2014
    Publication date: September 11, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masaaki HIGUCHI, Yoshio Ozawa, Katsuyuki Sekine, Ryota Fujitsuka
  • Patent number: 8829593
    Abstract: A first select transistor is formed on a semiconductor substrate. Memory cell transistors are stacked on the first select transistor and connected in series. A second select transistor is formed on the memory cell transistors. The memory cell transistors include a tapered semiconductor pillar which increases in diameter from the first select transistor toward the second select transistor, a tunnel dielectric film formed on the side surface of the semiconductor pillar, a charge storage layer which is formed on the side surface of the tunnel dielectric film and which increases in charge trap density from the first select transistor side toward the second select transistor side, a block dielectric film formed on the side surface of the charge storage layer, and conductor films which are formed on the side surface of the block dielectric film and which serve as gate electrodes.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: September 9, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Katsuyuki Sekine, Kensuke Takano, Masaaki Higuchi, Tetsuya Kai, Yoshio Ozawa
  • Patent number: 8803221
    Abstract: In one embodiment, a nonvolatile semiconductor memory device includes a substrate; a tunnel insulating film on the substrate; a charge storage layer on the tunnel insulating film; a block insulating film on the charge storage layer; a first element isolation insulating film in an element isolation trench in the substrate, having a bottom surface lower than an interface between the substrate and the tunnel insulating film, and having a top surface lower than an interface between the charge storage layer and the block insulating film; a second element isolation insulating film on the first element isolation insulating film, protruding to a top surface of the block insulating film, in contact with a side surface of the block insulating film, and having a higher Si concentration than the block insulating film; and a control gate electrode on the block insulating film and on the second element isolation insulating film.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Kai, Yoshio Ozawa
  • Patent number: 8796757
    Abstract: According to one embodiment, a semiconductor memory device with memory cells each composed of a vertical transistor, comprises a silicon layer formed into a columnar shape on a silicon substrate, a gate insulating film part in which a tunnel insulating film, a charge storage layer, and a block insulating film are formed to surround the sidewall surface of the silicon layer, and a stacked structure part formed to surround the sidewall surface of the gate insulating film part and in which a plurality of interlayer insulating films and a plurality of control gate electrode layers are stacked alternately. The silicon layer, gate insulating film part, and control gate electrode layer constitute the vertical transistor. The charge storage layer has a region lower in trap level than a region facing the control gate electrode layer between the vertical transistors.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 5, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Kai, Yoshio Ozawa, Ryota Fujitsuka, Yoshitaka Tsunashima
  • Patent number: 8766373
    Abstract: A semiconductor memory includes a plurality of stripe-like active areas formed by stacking, in a direction perpendicular to a substrate, a plurality of layers extending parallel to the substrate, a first gate electrode formed on first side surfaces of the active areas, the first side surfaces being perpendicular to the substrate, a second gate electrode formed on second side surfaces of the active areas, the second side surfaces being perpendicular to the substrate. The layers are patterned in self-alignment with each other, intersections of the active areas and the first gate electrode form a plurality of memory cells, and the plurality of memory cells in an intersecting plane share the first gate electrode.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: July 1, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masahiro Kiyotoshi, Akihito Yamamoto, Yoshio Ozawa, Fumitaka Arai, Riichiro Shirota
  • Patent number: 8759901
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device including a semiconductor layer with a main surface, a first insulating layer formed on the main surface of the semiconductor layer, a charge storage layer formed on the first insulating layer, a second insulating layer formed on the charge storage layer, and a control gate electrode formed on the second insulating layer. At least one inelastic scattering film that reduces energy of electrons by scattering is contained in at least one of the charge storage layer and second insulating layer.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: June 24, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaaki Higuchi, Yoshio Ozawa, Katsuyuki Sekine, Ryota Fujitsuka
  • Publication number: 20140120466
    Abstract: An electrostatic latent image developing toner includes toner base particles including a binder resin and an external additive attached to surfaces of the toner base particles. The external additive contains silica covered with a coating layer containing a nitrogen containing resin.
    Type: Application
    Filed: October 24, 2013
    Publication date: May 1, 2014
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Masami TSUJIHIRO, Yoshio OZAWA
  • Publication number: 20140087301
    Abstract: A carrier for electrostatic latent image developing is composed of carrier core containing a binder resin and magnetic material particles, and a shell layer that covers the carrier core. The binder has an acid value of at least a predetermined value, and contains a resin having a carboxyl group. The shell layer is composed of a resin selected from melamine resin and urea resin.
    Type: Application
    Filed: September 25, 2013
    Publication date: March 27, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masami Tujihiro, Yoshio Ozawa
  • Patent number: 8674426
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes a stacked body, a semiconductor pillar and a charge storage layer. The stacked body includes a plurality of insulating films alternately stacked with a plurality of electrode films. The semiconductor pillar is buried in the stacked body, and extends in a stacking direction of the insulating films and the electrode films. The charge storage layer is provided between the electrode films and the semiconductor pillar. The electrode films are divided into a plurality of control gate electrodes. Each of the plurality of control gate electrodes faces the semiconductor pillar and sandwiches the charge storage layer with the semiconductor pillar.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: March 18, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaaki Higuchi, Yoshio Ozawa