Patents by Inventor Hiroyuki Tomonaga

Hiroyuki Tomonaga 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: 20080020134
    Abstract: An infrared shielding film-coated glass comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises a first film layer formed in a thickness of from 0.2 to 2 ?m on the surface of the glass substrate and having transparent electroconductive oxide fine particles having an average primary particle diameter of at most 100 nm dispersed in a silicon oxide matrix in a mass ratio of transparent electroconductive oxide fine particles/silicon oxide=10/0.5 to 10/20, and a second film layer laminated in a thickness of from 0.02 to 0.2 ?m on the first film layer and comprising silicon oxide, silicon oxynitride or silicon nitride, and the increase in haze by abrasion after a 1000 rotation test by a CS-10F abrasive wheel in accordance with the abrasion resistance test stipulated in JIS R3212 (1998) is at most 5%.
    Type: Application
    Filed: September 24, 2007
    Publication date: January 24, 2008
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hiroyuki TOMONAGA, Kazuo Sunahara
  • Publication number: 20070292695
    Abstract: An infrared shielding film-coated glass plate comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises fine ITO particles having an average primary particle diameter of at most 100 nm dispersed in a matrix containing silicon oxide as the main component and containing nitrogen in an amount of at least 2 at % based on Si and has a film thickness of from 200 to 3,000 nm.
    Type: Application
    Filed: April 3, 2007
    Publication date: December 20, 2007
    Applicant: Asahi Glass Company, Limited
    Inventors: Hirokazu KODAIRA, Hiroyuki TOMONAGA, Kazuo SUNAHARA, Yuichi YAMAMOTO, Daisuke KOBAYASHI
  • Patent number: 7300806
    Abstract: It is an object to provide fine particles of bismuth titanate having excellent dielectric characteristics, high crystallinity and a small particle diameter, and a process for their production. The object is accomplished by a process which comprises a step of obtaining a melt comprising, as represented by mol % based on oxides, from 23 to 72% of Bi2O3, from 4 to 64% of TiO2 and from 6 to 50% of B2O3, a step of quickly quenching this melt to obtain an amorphous material, a step of crystallization of bismuth titanate crystals from the above amorphous material, and a step of separating the bismuth titanate crystals from the obtained crystallized material, in this order.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: November 27, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Yoshihisa Beppu, Kazuo Sunahara, Hiroyuki Tomonaga, Kumiko Takahashi
  • Patent number: 7270765
    Abstract: To provide a composition for forming a dielectric layer excellent in dielectric constant and withstand voltage properties, a MIM capacitor and a process for its production. A composition for forming a dielectric layer, which comprises fine particles of perovskite type dielectric crystal, glass frit, and a hydrolysable silicon compound or its oligomer, and a MIM capacitor comprising a substrate, and a bottom electrode layer, a dielectric layer having a structure such that fine particles of perovskite type dielectric crystal are dispersed in a silicon oxide matrix containing glass-forming ions and a top electrode, formed on the substrate in this order.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: September 18, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Hiroyuki Tomonaga, Katsuaki Miyatani, Yoshihisa Beppu, Kumiko Takahashi, Kazuo Sunahara
  • Publication number: 20070178317
    Abstract: An infrared shielding film-coated glass plate comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises fine ITO particles having an average primary particle diameter of at most 100 nm dispersed in a matrix containing silicon oxide and titanium oxide and has a film thickness of from 100 to 1,500 nm.
    Type: Application
    Filed: January 26, 2007
    Publication date: August 2, 2007
    Applicant: Asahi Glass Company, Limited
    Inventors: Hirokazu KODAIRA, Hiroyuki Tomonaga, Kazuo Sunahara
  • Patent number: 7208324
    Abstract: It is an object to provide a liquid composition for forming a thin film, with which a ferroelectric thin film having excellent characteristics can be prepared even by baking at a low temperature, and a process for producing a ferroelectric thin film using it. The above object is achieved by use of a liquid composition for forming a ferroelectric thin film, characterized in that in a liquid medium, ferroelectric oxide particles being plate or needle crystals, which are represented by the formula ABO3 (wherein A is at least one member selected from the group consisting of Ba2+, Sr2+, Ca2+, Pb2+, La3+, K+ and Na+, and B is at least one member selected from the group consisting of Ti4+, Zr4+, Nb5+, Ta5+ and Fe3+) and have a Perovskite structure and which have an average primary particle size of at most 100 nm and an aspect ratio of at least 2, are dispersed, and a soluble metal compound which forms a ferroelectric oxide by heating, is dissolved.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: April 24, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Kazuo Sunahara, Hiroyuki Tomonaga, Yoshihisa Beppu
  • Publication number: 20060124890
    Abstract: The present invention provides a liquid composition for forming a thin film, with which a ferroelectric thin film having excellent characteristics can be prepared even by baking at a low temperature, and a process for producing a ferroelectric thin film using it. A liquid composition for forming a ferroelectric thin film is used, which is characterized by comprising a liquid medium, crystalline ferroelectric oxide particles represented by the formula (Bi2O2)2+(Bim-1TimO3.5m-0.5)2? (wherein m is an integer of from 1 to 5) or (Bi2O2)2+(Am-1TimO3.5m-0.5)2? (wherein A is Bi3+ or La3+, the La3+/Bi3+ ratio is from 0.05 to 0.5, and m is an integer of from 1 to 5) and having an average primary particle diameter of at most 100 nm, dispersed in the liquid medium, and a soluble metal compound capable of forming a ferroelectric oxide by heating, dissolved in the liquid medium.
    Type: Application
    Filed: January 27, 2006
    Publication date: June 15, 2006
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kazuo Sunahara, Hiroyuki Tomonaga, Yoshihisa Beppu
  • Publication number: 20060046320
    Abstract: It is an object to provide a liquid composition for forming a thin film, with which a ferroelectric thin film having excellent characteristics can be prepared even by baking at a low temperature, and a process for producing a ferroelectric thin film using it. The above object is achieved by use of a liquid composition for forming a ferroelectric thin film, characterized in that in a liquid medium, ferroelectric oxide particles being plate or needle crystals, which are represented by the formula ABO3 (wherein A is at least one member selected from the group consisting of Ba2+, Sr2+, Ca2+, Pb2+, La2+, K+ and Na+, and B is at least one member selected from the group consisting of Ti4+, Zr4+, Nb5+, Ta5+ and Fe3+) and have a Perovskite structure and which have an average primary particle size of at most 100 nm and an aspect ratio of at least 2, are dispersed, and a soluble metal compound which forms a ferroelectric oxide by heating, is dissolved.
    Type: Application
    Filed: October 28, 2005
    Publication date: March 2, 2006
    Applicant: Asahi Glass Company, Limited
    Inventors: Kazuo Sunahara, Hiroyuki Tomonaga, Yoshihisa Beppu
  • Publication number: 20060008928
    Abstract: It is an object to provide fine particles of bismuth titanate having excellent dielectric characteristics, high crystallinity and a small particle diameter, and a process for their production. The object is accomplished by a process which comprises a step of obtaining a melt comprising, as represented by mol % based on oxides, from 23 to 72% of Bi2O3, from 4 to 64% of TiO2 and from 6 to 50% of B2O3, a step of quickly quenching this melt to obtain an amorphous material, a step of crystallization of bismuth titanate crystals from the above amorphous material, and a step of separating the bismuth titanate crystals from the obtained crystallized material, in this order.
    Type: Application
    Filed: September 13, 2005
    Publication date: January 12, 2006
    Applicant: ASAHI-GLASS COMPANY, LIMITED
    Inventors: Yoshihisa Beppu, Kazuo Sunahara, Hiroyuki Tomonaga, Kumiko Takahashi
  • Publication number: 20060001069
    Abstract: To provide a composition for forming a dielectric layer excellent in dielectric constant and withstand voltage properties, a MIM capacitor and a process for its production. A composition for forming a dielectric layer, which comprises fine particles of perovskite type dielectric crystal, glass frit, and a hydrolysable silicon compound or its oligomer, and a MIM capacitor comprising a substrate, and a bottom electrode layer, a dielectric layer having a structure such that fine particles of perovskite type dielectric crystal are dispersed in a silicon oxide matrix containing glass-forming ions and a top electrode, formed on the substrate in this order.
    Type: Application
    Filed: June 13, 2005
    Publication date: January 5, 2006
    Applicant: Asahi Glass Company, Limited
    Inventors: Hiroyuki Tomonaga, Katsuaki Miyatani, Yoshihisa Beppu, Kumiko Takahashi, Kazuo Sunahara
  • Publication number: 20050164014
    Abstract: An infrared shielding glass coated with an infrared shielding film which is excellent in heat resistance and exhibits high visible light transmittance, low infrared transmittance (especially infrared transmittance in a near infrared region) and high electromagnetic wave transmittance. An infrared shielding glass comprising a glass substrate having at least one surface thereof coated with a coating liquid containing fine particles of conductive oxide and a matrix component to thereby provide an infrared shielding film, characterized in that the infrared shielding glass exhibits a transmittance at a wavelength of 1.0 ?m of at most 35% and a transmittance at a wavelength of 2.0 ?m of at most 20% and that the infrared shielding film has a surface resistivity of at least 1 M?/?.
    Type: Application
    Filed: January 27, 2005
    Publication date: July 28, 2005
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Hiroyuki Tomonaga, Takeshi Morimoto, Kazuo Sunahara
  • Publication number: 20050084718
    Abstract: An infrared shielding film-coated glass comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises a first film layer formed in a thickness of from 0.2 to 2 ?m on the surface of the glass substrate and having transparent electroconductive oxide fine particles having an average primary particle diameter of at most 100 nm dispersed in a silicon oxide matrix in a mass ratio of transparent electroconductive oxide fine particles/silicon oxide=10/0.5 to 10/20, and a second film layer laminated in a thickness of from 0.02 to 0.2 ?m on the first film layer and comprising silicon oxide, silicon oxynitride or silicon nitride, and the increase in haze by abrasion after a 1000 rotation test by a CS-10F abrasive wheel in accordance with the abrasion resistance test stipulated in JIS R3212 (1998) is at most 5%.
    Type: Application
    Filed: October 13, 2004
    Publication date: April 21, 2005
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hiroyuki Tomonaga, Kazuo Sunahara
  • Publication number: 20020114956
    Abstract: A photochromic glass excellent in coloration/color fading characteristics, which comprises a glass substrate and a photochromic film formed on the glass substrate, wherein the photochromic film comprises at least one metal selected from the group consisting of platinum, palladium, iridium, rhodium and gold, copper, silver halide crystallites and silicon oxide, and a process for its production.
    Type: Application
    Filed: November 20, 2001
    Publication date: August 22, 2002
    Applicant: Asahi Glass Company, Limited
    Inventors: Hiroyuki Tomonaga, Takeshi Morimoto, Taki Matsumoto
  • Patent number: 5480722
    Abstract: A ultraviolet ray absorbent glass comprises a substrate glass, a ultraviolet ray absorbent film including as the major component at least one selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and an intermediate film having an intermediate refractive index which is between the refractive indices of the ultraviolet absorbent film and the substrate glass, the intermediate film being located between the ultraviolet absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: January 2, 1996
    Assignee: Asahi Glass Company Ltd.
    Inventors: Hiroyuki Tomonaga, Takeshi Morimoto, Kazuya Hiratsuka