Patents by Inventor Hirofumi Hokari

Hirofumi Hokari 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: 8846097
    Abstract: A process is provided that includes performing a high-temperature high-pressure hydrothermal treatment for a reaction liquid prepared as a mixture of an acylated inorganic fine particle precursor and an organic modifying agent that has a carboxyl group. Because the reaction liquid contains the acylated inorganic fine particle precursor in advance, the grain growth during the high-temperature high-pressure hydrothermal treatment can be suppressed. The process thus enables production of organic-modified inorganic fine particles of a size about the same as or even smaller than that before the high-temperature high-pressure hydrothermal treatment.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: September 30, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Hirofumi Hokari, Sukenori Ichikawa
  • Publication number: 20140216631
    Abstract: A method for producing an electrode assembly includes: obtaining a porous active material molded body by molding a constituent material containing a lithium multiple oxide in the form of particles by compression, and then performing a heat treatment at a temperature of 850° C. or higher and lower than the melting point of the used lithium multiple oxide; forming a solid electrolyte layer by applying a liquid containing a constituent material of an inorganic solid electrolyte to the surface of the active material molded body including the inside of each pore of the active material molded body, and then performing a heat treatment; and bonding a current collector to the active material molded body exposed from the solid electrolyte layer.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 7, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsutomu TERAOKA, Sukenori ICHIKAWA, Hirofumi HOKARI, Tomofumi YOKOYAMA
  • Publication number: 20120065383
    Abstract: A process is provided that includes performing a high-temperature high-pressure hydrothermal treatment for a reaction liquid prepared as a mixture of an acylated inorganic fine particle precursor and an organic modifying agent that has a carboxyl group. Because the reaction liquid contains the acylated inorganic fine particle precursor in advance, the grain growth during the high-temperature high-pressure hydrothermal treatment can be suppressed. The process thus enables production of organic-modified inorganic fine particles of a size about the same as or even smaller than that before the high-temperature high-pressure hydrothermal treatment.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 15, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hirofumi HOKARI, Sukenori ICHIKAWA
  • Patent number: 7781760
    Abstract: A thin film transistor includes a source electrode and a drain electrode which are disposed to face each other, an organic semiconductor layer provided at least between the source electrode and the drain electrode, a plurality of gate lines extending over the source electrode, the organic semiconductor layer, and the drain electrode, and a gate insulating layer interposed between the source electrode, the drain electrode, and the organic semiconductor layer and the plurality of gate lines.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: August 24, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Kiyoshi Nakamura, Hirofumi Hokari, Kazuya Nakamura
  • Patent number: 7589018
    Abstract: A method of forming a contact hole includes forming a first conductive layer patterned so as to serve as an electrode or a wiring on a substrate, forming an insulation layer on the substrate and the first conductive layer, inserting a cutting instrument into the insulation layer at an angle to a surface of the insulation layer, the angle being in the range from 5° to 80°, and forming a tapered opening extending to the electrode or the wiring in the insulation layer by drawing out the cutting instrument.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: September 15, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Soichi Moriya, Takeo Kawase, Mitsuaki Harada, Takehisa Saeki, Tomoyuki Okuyama, Hirofumi Hokari, Takashi Aoki
  • Patent number: 7514115
    Abstract: Aspects of the invention can provide a method of fabricating an organometallic compound film capable, by stably forming a film with the organometallic compound, of increasing bonding forces of junction interfaces and of realizing a hyper thin film, the organometallic compound film, and an organoelectronic device (e.g., an organic electroluminescence device, an organic solar battery, or an organic thin film transistor) and an electronic device equipped with the organometallic compound film are provided. The method of fabricating a thin film of an organometallic compound on a substrate, can include the step of forming an organic material by a liquid phase process and the step of forming metal by a vapor phase process to form a thin film of an organometallic compound composed of the organic material and the metal.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: April 7, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Takashima, Katsuyuki Morii, Hirofumi Hokari, Rie Makiura
  • Publication number: 20080169462
    Abstract: A thin film transistor includes a source electrode and a drain electrode which are disposed to face each other, an organic semiconductor layer provided at least between the source electrode and the drain electrode, a plurality of gate lines extending over the source electrode, the organic semiconductor layer, and the drain electrode, and a gate insulating layer interposed between the source electrode, the drain electrode, and the organic semiconductor layer and the plurality of gate lines.
    Type: Application
    Filed: September 18, 2007
    Publication date: July 17, 2008
    Applicant: Seiko Epson Corporation
    Inventors: Kiyoshi Nakamura, Hirofumi Hokari, Kazuya Nakamura
  • Publication number: 20080113466
    Abstract: A method of forming a contact hole includes forming a first conductive layer patterned so as to serve as an electrode or a wiring on a substrate, forming an insulation layer on the substrate and the first conductive layer, inserting a cutting instrument into the insulation layer at an angle to a surface of the insulation layer, the angle being in the range from #5#° to~ 80#°, and forming a tapered opening extending to the electrode or the wiring in the insulation layer by drawing out the cutting instrument.
    Type: Application
    Filed: October 5, 2007
    Publication date: May 15, 2008
    Applicant: Seiko Epson Corporation
    Inventors: Soichi Moriya, Takeo Kawase, Mitsuaki Harada, Takehisa Saeki, Tomoyuki Okuyama, Hirofumi Hokari, Takashi Aoki
  • Patent number: 7252570
    Abstract: According to the manufacturing method for an organic electroluminescence device comprising luminescent layers between an anode and a cathode, electron transport layer forming materials are introduced in the liquid phase process so as to form electron transport layers. First materials composed of prescribed elements, such as halides (e.g., LiF) or oxides of alkali metals, alkali earth metals, and rare earth metals, are introduced into openings of organic bank layers so as to form electron transport layers on blue-color luminescent layers realizing blue-color emission; and second materials composed of organic metallic complex (e.g., ?-diketone complex), generally expressed in a chemical formula MAn using a center atom M (e.g. Ca) and a ligand A (e.g., acetylacetone (acac)), are introduced into openings of organic bank layers so as to form electron transport layers on red-color and green-color luminescent layers realizing red-color and green-color emission.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: August 7, 2007
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Takashima, Shuichi Takei, Katsuyuki Morii, Hirofumi Hokari, Rie Makiura, Shunichi Seki
  • Publication number: 20050079277
    Abstract: Aspects of the invention can provide a method of fabricating an organometallic compound film capable, by stably forming a film with the organometallic compound, of increasing bonding forces of junction interfaces and of realizing a hyper thin film, the organometallic compound film, and an organoelectronic device (e.g., an organic electroluminescence device, an organic solar battery, or an organic thin film transistor) and an electronic device equipped with the organometallic compound film are provided. The method of fabricating a thin film of an organometallic compound on a substrate, can include the step of forming an organic material by a liquid phase process and the step of forming metal by a vapor phase process to form a thin film of an organometallic compound composed of the organic material and the metal.
    Type: Application
    Filed: August 23, 2004
    Publication date: April 14, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takeshi Takashima, Katsuyuki Morii, Hirofumi Hokari, Rie Makiura
  • Publication number: 20050073249
    Abstract: An organic light-emitting device having a high efficiency in its luminous performance and a long product life, a method of manufacturing an organic light-emitting device, and an electronic apparatus are provided. The organic light-emitting device includes emissive functional layers formed between an anode and a cathode. A hole transport material and a emissive material are mixed in the emissive functional layers, while the hole transport material is provided with a host function, in which the emissive material works as a guest.
    Type: Application
    Filed: August 12, 2004
    Publication date: April 7, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Katsuyuki Morii, Takeshi Takashima, Hirofumi Hokari, Rie Makiura
  • Patent number: 6825061
    Abstract: In a method of manufacturing an organic EL device, when a light-emitting layer is formed, an ink composition for the organic EL device, including an organic light-emitting material and at least one type of a high boiling point solvent having a boiling point of 200° C. or more, is ejected onto a substrate having an electrode, or upon a hole injection/transport layer formed on the substrate having the electrode. Then, the ink composition is heat-treated while the residue of the high boiling point solvent remains. Hence, the method can provide an organic EL device that has a long lifetime and superior emissive properties, such as stability of emission luminance.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: November 30, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Hirofumi Hokari, Shunichi Seki, Ryuji Ishii
  • Publication number: 20040207312
    Abstract: According to the manufacturing method for an organic electroluminescence device comprising luminescent layers between an anode and a cathode, electron transport layer forming materials are introduced in the liquid phase process so as to form electron transport layers. First materials composed of prescribed elements, such as halides (e.g., LiF) or oxides of alkali metals, alkali earth metals, and rare earth metals, are introduced into openings of organic bank layers so as to form electron transport layers on blue-color luminescent layers realizing blue-color emission; and second materials composed of organic metallic complex (e.g., &bgr;-diketone complex), generally expressed in a chemical formula MAn using a center atom M (e.g. Ca) and a ligand A (e.g., acetylacetone (acac)), are introduced into openings of organic bank layers so as to form electron transport layers on red-color and green-color luminescent layers realizing red-color and green-color emission.
    Type: Application
    Filed: January 16, 2004
    Publication date: October 21, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takeshi Takashima, Shuichi Takei, Katsuyuki Morii, Hirofumi Hokari, Rie Makiura, Shunichi Seki
  • Publication number: 20040099882
    Abstract: In a method of manufacturing an organic EL device, when a light-emitting layer is formed, an ink composition for the organic EL device, including an organic light-emitting material and at least one type of a high boiling point solvent having a boiling point of 200° C. or more, is ejected onto a substrate having an electrode, or upon a hole injection/transport layer formed on the substrate having the electrode. Then, the ink composition is heat-treated while the residue of the high boiling point solvent remains. Hence, the method can provide an organic EL device that has a long lifetime and superior emissive properties, such as stability of emission luminance.
    Type: Application
    Filed: February 3, 2003
    Publication date: May 27, 2004
    Inventors: Hirofumi Hokari, Shunichi Seki, Ryuji Ishii