Patents by Inventor Toshio Ishida

Toshio Ishida 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: 8202597
    Abstract: A multilayer optical recording medium includes: a substrate; a plurality of optical recording layers provided on the substrate; and a plurality of intermediate layers each provided between adjoining optical recording layers disposed in a thickness direction. In this multilayer optical recording medium, each of the intermediate layers has a birefringence property and a principal axis direction of birefringence of each intermediate layer is oriented at 90 degrees with respect to that of an adjoining intermediate layer.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: June 19, 2012
    Assignee: Fujifilm Corporation
    Inventors: Toshio Ishida, Katsuhiko Meguro, Toshiyuki Kitahara
  • Publication number: 20100330496
    Abstract: A simultaneous two-photon absorption recording-reproduction method of recording and reproducing a data by inducing changes in the fluorescence intensities in a recorded part and an unrecorded part by simultaneous two-photon absorption, comprising: generating a fluorescence quencher in a two-photon recording part; and inducing quenching by excitation energy transfer between the fluorescence quencher and a fluorescent dye to physically quench the fluorescence by reproduction light from the fluorescent dye and decrease the fluorescence intensity in the recorded part; and a simultaneous two-photon absorption recording material for use in the method capable of generating a fluorescence quencher capable of inducing quenching by excitation energy transfer between the fluorescence quencher and a fluorescent dye by simultaneous two-photon absorption and physically quenching the fluorescence from the fluorescent dye.
    Type: Application
    Filed: June 30, 2010
    Publication date: December 30, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Masaharu AKIBA, Eri TAKAHASHI, Hiroo TAKIZAWA, Toshio ISHIDA
  • Publication number: 20100233414
    Abstract: A multilayer optical recording medium includes: a substrate; a plurality of optical recording layers provided on the substrate; and a plurality of intermediate layers each provided between adjoining optical recording layers disposed in a thickness direction. In this multilayer optical recording medium, each of the intermediate layers has a birefringence property and a principal axis direction of birefringence of each intermediate layer is oriented at 90 degrees with respect to that of an adjoining intermediate layer.
    Type: Application
    Filed: March 9, 2010
    Publication date: September 16, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Toshio ISHIDA, Katsuhiko MEGURO, Toshiyuki KITAHARA
  • Patent number: 7384723
    Abstract: An optical information recording medium including a substrate having successively disposed thereon a recording layer, an interlayer, a pressure sensitive adhesive layer and a cover film in which information is recordable and reproducible by irradiating laser light and the pressure sensitive adhesive layer contains a polymer having a glass transition temperature Tg of 0° C. or lower, as well as a method for producing an optical information recording medium including adhering a cover layer to a surface of a recording layer so that a pressure sensitive adhesive layer is abutted on the surface of the recording layer, and an optical information recording medium produced by the method.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: June 10, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Takeshi Kakuta, Toshio Ishida, Takako Ozawa
  • Patent number: 7341820
    Abstract: The present invention is an optical information recording medium comprising a substrate having disposed in an order thereon a recording layer, an interlayer, and a cover layer, wherein recording and reproduction are carried out by the irradiation with a laser light having a wavelength in the range of 380 to 500 nm through a lens having a lens numerical aperture NA of 0.7 or more, wherein the recording layer is a layer of an organic substance and the thickness of the interlayer is within a range of 1 nm to 9 nm.
    Type: Grant
    Filed: November 29, 2002
    Date of Patent: March 11, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Toshio Ishida, Takeshi Kakuta, Shinji Saito
  • Publication number: 20070122747
    Abstract: The present invention provides an optical information recording medium including a substrate with an on-groove and an in-groove, having successively disposed thereon a dye recording layer and a transparent sheet, wherein a width of the on-groove ranges from 50 to 140 nm, and a barrier layer is formed between the recording layer and the transparent sheet. The invention also provides an optical information recording method including irradiating the optical information recording medium with laser light from the side of the medium provided with a cover layer to form a void at a signal pit portion in the dye recording layer and thereby carrying out recording of information as well as an optical information recording medium on which information has been recorded by the method.
    Type: Application
    Filed: January 24, 2007
    Publication date: May 31, 2007
    Inventors: Yoshihisa Usami, Takeshi Kakuta, Toshio Ishida
  • Patent number: 7129019
    Abstract: The present invention provides an optical information recording medium that includes a substrate including a groove with a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm and having successively disposed thereon a light reflecting layer, a recording layer containing a dye in which information is recorded by irradiation with a laser beam having a wavelength of no greater than 450 nm, an adhesive layer, and a cover layer with a thickness of 0.01 to 0.5 mm. A surface of the optical information recording medium on a side disposed with the cover layer has a center surface average roughness (SRa1) of no greater than 3.0 nm when measured over a large surface area and a center surface average roughness (SRa2) of no greater than 3.0 nm when measured over a minute surface area.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: October 31, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Kakuta, Shinji Saito, Toshio Ishida, Takako Ozawa, Hiroaki Doushita
  • Patent number: 7103897
    Abstract: An optical information recording medium including a substrate, a recording layer formed on the substrate, and a transparent sheet provided on the recording layer via an adhesive layer. The adhesive layer has a peak of loss modulus at a temperature of 0° C. or lower, and exhibits an E1?/E2? ratio of 2.0 or less, wherein E1? and E2? represent storage moduli of the adhesive layer at 25° C. and 80° C., respectively.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: September 5, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Kakuta, Toshio Ishida
  • Patent number: 7051348
    Abstract: The invention provides an optical information recording medium, for use with a laser irradiating a laser beam having a wavelength of 380 to 500 nm through an objective lens with a numerical aperture of at least 0.7, the optical information recording medium comprising, in the following order: a substrate; a recording layer; a layer of acrylic adhesive; and a cover layer. A light reflecting layer may be provided between the substrate and the recording layer. Also a cover layer formed by an acrylic adhesive material may be provided instead of the layer of the acrylic adhesive material and the cover layer.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: May 23, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Ishida, Shinji Saito, Takeshi Kakuta
  • Publication number: 20060048886
    Abstract: The invention provides a method for manufacturing an optical information recording medium having a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm, and being capable of recording and reproducing using a light with a wavelength of 450 nm or less, the method at least comprising: a metal reflective layer forming step for forming a metal reflective layer on a substrate; a recording layer forming step for forming a recording layer of an organic dye type on said metal reflective layer; and a cover layer forming step for forming a cover layer on said recording layer; in this order.
    Type: Application
    Filed: October 7, 2005
    Publication date: March 9, 2006
    Inventors: Takeshi Kakuta, Takako Ozawa, Toshio Ishida, Akira Mizuta
  • Publication number: 20060029741
    Abstract: The present invention provides a magnetic particle-coated material having a layer including a CuAu type or Cu3Au type ferromagnetic ordered alloy phase on an organic support. Further, the present invention provides a method of manufacturing a magnetic particle-coated material that sequentially includes a step of manufacturing alloy particles capable of forming a ferromagnetic ordered alloy phase, a step of coating an organic support with the alloy particles to form a coating film, and a step of annealing the coating film in a reducing atmosphere to make the alloy particles into magnetic particles, and further includes a step of oxidizing the alloy particles, the oxidizing step being performed between the alloy particle manufacturing step and the annealing step.
    Type: Application
    Filed: October 13, 2005
    Publication date: February 9, 2006
    Inventors: Yasushi Hattori, Koukichi Waki, Toshio Ishida
  • Patent number: 6989069
    Abstract: The invention provides a method for manufacturing an optical information recording medium having a track pitch of 200 to 400 nm and a groove depth of 20 to 150 nm, and being capable of recording and reproducing using a light with a wavelength of 450 nm or less, the method at least including: a metal reflective layer forming step for forming a metal reflective layer on a substrate; a recording layer forming step for forming a recording layer of an organic dye type on said metal reflective layer; and a cover layer forming step for forming a cover layer on said recording layer; in this order.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: January 24, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Kakuta, Takako Ozawa, Toshio Ishida, Akira Mizuta
  • Patent number: 6967048
    Abstract: An optical recording medium includes a substrate having successively disposed thereon a light-reflecting layer, a recording layer and a cover layer, with recording and playback being effected by irradiating the medium with a laser beam having a wavelength of 450 nm or less from the side disposed with the cover layer, wherein a sputter layer having a thickness of 1 to 80 nm is formed between the recording layer and the cover layer, and the sputter layer and the cover layer are adhered with an adhesive. The sputter layer preferably has a thickness within a range from 2 to 50 nm and is preferably formed from a simple substance of Si, Zn, Ag, Al, Ti, Sn or Ge, a compound comprising at least one of the simple substances, or a combination thereof.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: November 22, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Saito, Takeshi Kakuta, Toshio Ishida
  • Patent number: 6924018
    Abstract: The present invention provides an optical information recording medium including a substrate having a groove that has a track pitch of 200 to 400 nm and a depth of 20 to 150 nm, the substrate having successively disposed thereon a light-reflective layer, a recording layer on which information is recordable by a laser beam having a wavelength of 450 nm or less, an adhesive layer containing an adhesive, and a cover layer having a thickness of 0.01 to 0.5 mm, wherein a surface of the light-reflective layer at a side thereof at which the recording layer is disposed has a ten-point average roughness Rz of 70 nm or less, a central surface average roughness SRa of 30 nm or less, and an average projection diameter Dv, at a height of 15 nm from a reference plane, of 75 nm or less.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: August 2, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takako Ozawa, Takeshi Kakuta, Toshio Ishida
  • Patent number: 6869656
    Abstract: An optical information recording medium including a substrate, a recording layer, and a cover layer in this order; wherein information is recorded or reproduced by irradiating a laser beam having an wavelength in the range of 380 to 500 nm on the recording layer through a lens having a numerical aperture NA of 0.7 or more; the recording layer includes an organic substance; and the extinction coefficient k of the recording layer is at least 0.1 and less than 0.3.
    Type: Grant
    Filed: November 29, 2002
    Date of Patent: March 22, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Ishida, Takeshi Kakuta, Shinji Saito
  • Patent number: 6849316
    Abstract: An information recording medium showing a high light-resistance has a recording layer containing a dye compound having the following formula (I-1) or (I-2): in which each of A1, A2, B1 and B2 is a substituent; each of Y1 and Z1 is a group of atoms required for forming a carbon ring or a heterocyclic ring; each of E and G is a group of atoms required for forming a conjugated double bond chain; X1 is ?O, ?NR or ?C(CN)2, wherein R is a substituent; X2 is —O, —NR or —C(CN)2, wherein R is a substituent; each of L1, L2, L3, L4 and L5 is a methine group which may have a substituent; Mk+ is an onium ion containing a positively charged onium atom to which no hydrogen atom is attached; each of m and n is 0, 1 or 2; each of x and y is 0 or 1; and x is an integer of 1 to 10.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: February 1, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koji Wariishi, Toshio Ishida, Shinnichi Morishima
  • Patent number: 6815030
    Abstract: An optical information recording medium achieving stable recording and reading characteristics and having good storage stability including light resistance and heat resistance by preventing colorants contained in a recording layer therein from being decomposed, and also an optical information recording medium that can be individually differentiated from others by outward appearance. The optical information recording medium includes a substrate having successively disposed thereon at least a light-reflective layer, a recording layer on which information is recorded by laser light of a wavelength no longer than 500 nm, and a cover layer containing a UV absorbent that blocks out light of a wavelength no longer than 400 nm and/or a dye that blocks out light of a wavelength no shorter than 500 nm. A second substrate may be disposed opposite to a side of the optical information recording medium that is irradiated with light and may be colored.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: November 9, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Ishida, Takeshi Kakuta, Shinichi Kato
  • Patent number: 6808782
    Abstract: An optical information recording medium including a substrate having a groove that has a track pitch of 200 to 400 nm and a depth of 10 to 150 nm, the substrate having successively disposed thereon a light-reflective layer, a recording layer and a cover layer, wherein information is recordable and reproducible by irradiating a laser beam having a wavelength of 500 nm or less from a side of the medium disposed with the cover layer, and the light-reflective layer contains aluminum or an aluminum alloy.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: October 26, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihisa Usami, Toshio Ishida
  • Patent number: 6800347
    Abstract: A high-density optical information recording medium comprising, on a substrate, a recording layer capable of recording information by irradiation of a laser beam at a wavelength of from 380 to 500 nm, wherein the recording layer contains a compound represented by the following general formula (I): where R1 to R6 each represents, independently, a substituent, M represents a metal atom, and n represents an integer of 1 or greater.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: October 5, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshio Ishida, Naoki Saito
  • Patent number: D1016762
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: March 5, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Toshio Horiki, Yoshihiko Ishida