Patents by Inventor Tatsuya Iwasaki

Tatsuya Iwasaki 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: 6855025
    Abstract: Disclosed herein is a process for producing a narrow titanium-containing wire, comprising steps of: (i) providing a structure comprising a substrate having a titanium-containing surface and a porous layer containing narrow pores extending towards the surface; and (ii) forming narrow titanium-containing wires in the respective narrow pores by heat treatment of the structure obtained in the step (i).
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: February 15, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Iwasaki, Tohru Den
  • Patent number: 6838297
    Abstract: The invention provides a nanostructure including an anodized film including nanoholes. The anodized film is formed on a substrate having a surface including at least one material selected from the group consisting of semiconductors, noble metals, Mn, Fe, Co, Ni, Cu and carbon. The nanoholes are cut completely through the anodized film from the surface of the anodized film to the surface of the substrate. The nanoholes have a first diameter at the surface of the anodized film and a second diameter at the surface of the substrate. The nanoholes are characterized in that either a constriction exists at a location between the surface of the anodized film and the surface of the substrate, or the second diameter is greater than the first diameter.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: January 4, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Iwasaki, Tohru Den
  • Publication number: 20040218651
    Abstract: An electron-beam excitation laser has a laser structure with a light emitter and reflectors on one hand and an electron source on the other hand, wherein at least part of the light emitter or reflectors has a multidimensional photonic crystal structure. An electron-beam excitation laser includes an electron source emitting electrons and a laser structure consisting of a light emitter and reflectors, accelerates electrons from the electron source, and irradiates the electrons to the laser structure to emit a laser beam from the laser structure, wherein the reflectors and/or the light emitter in the laser structure are formed with multidimensional photonic crystals in which dielectrics with different dielectric constants are arrayed in a plurality of directions at periodic intervals, and one of the dielectrics with different dielectric constants may be formed with a light-emitting material.
    Type: Application
    Filed: June 3, 2004
    Publication date: November 4, 2004
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tatsuya Iwasaki, Tohru Den
  • Patent number: 6791463
    Abstract: In an on-board control system, a body ECU executes various control operations in response to the supply of power voltage from a battery. There is connected on the power line of the battery a voltage holding circuit which is formed of a capacitor so that the variation of battery voltage slows. A switch input circuit samples the on/off states of external switches periodically under control of a microcomputer. The microcomputer determines a fall of battery voltage, causing the switch input circuit to stop sampling of switch states. Stopping the circuit operation and thus reducing the battery load current slows the voltage fall at the occurrence of collision of vehicle, allowing adequate time to store collision data in a collision memory circuit.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: September 14, 2004
    Assignee: Denso Corporation
    Inventors: Tatsuya Iwasaki, Nobutomo Takagi, Hiroshi Kikukawa
  • Patent number: 6790787
    Abstract: A method of producing a structure having narrow pores includes a first step of bringing pore-guiding members into contact with upper and lower surfaces of a member comprising aluminum as a principal ingredient and a second step of anodizing the member comprising aluminum as the principal ingredient to form narrow pores. The pore-guiding members contain the same material as a principal ingredient. The second step includes preferably a step of transforming the member comprising aluminum as the principal ingredient into a porous body comprising alumina having narrow pores oriented substantially parallel to the interfaces between the pore-guiding members and the member comprising aluminum as the principal ingredient.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: September 14, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Iwasaki, Tohru Den
  • Patent number: 6784007
    Abstract: The present invention provides a nano-structure which can be applied to various high-function devices. The nano-structure includes an anodically oxidized layer having a plurality of kinds of pores.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: August 31, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Iwasaki, Tohru Den
  • Patent number: 6752676
    Abstract: A method for producing an electron-emitting device having an electroconductive film with an electron-emitting region extending between plural electrodes, includes a step of forming the electron-emitting region in the electroconductive film, including a step of heating the electroconductive film, and a step of energizing the electroconductive film in an atmosphere in which a gas for promoting cohesion of the electroconductive film exists.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: June 22, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Hisaaki Kawade, Toshikazu Ohnishi, Tatsuya Iwasaki, Takeo Ono
  • Publication number: 20040116034
    Abstract: A method of manufacturing an electronic device in which a substrate with a pair of electrodes is provided and a carbon nanotube is formed or arranged to electrically connect the electrodes.
    Type: Application
    Filed: November 14, 2003
    Publication date: June 17, 2004
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tohru Den, Tatsuya Iwasaki
  • Patent number: 6737668
    Abstract: A method of manufacturing a structure with pores which are formed by anodic oxidation and whose layout, pitch, position, direction, shape and the like can be controlled. The method includes the steps of: disposing a lamination film on a substrate, the lamination film being made of insulating layers and a layer to be anodically oxidized and containing aluminum as a main composition; and performing anodic oxidation starting from an end surface of the lamination film to form a plurality of pores having an axis substantially parallel to a surface of the substrate, wherein the layer to be anodically oxidized is sandwiched between the insulating layers, and a projected pattern substantially parallel to the axis of the pore is formed on at least one of the insulating layers at positions between the pores.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: May 18, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tohru Den, Tatsuya Iwasaki
  • Patent number: 6720728
    Abstract: The present invention discloses a carbon nanotube device comprising a support having a conductive surface and a carbon nanotube, one of whose terminus binds to the conductive surface so that conduction between the surface and the carbon nanotube is maintained, wherein a root of the carbon nanotube where the carbon nanotube binds to the conductive surface is surrounded by a wall. Such a carbon nanotube device, having carbon nanotubes with a uniform direction of growth, can generate a large quantity of emitted electrons when it is used as an electron emission device.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: April 13, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tohru Den, Tatsuya Iwasaki
  • Publication number: 20040001964
    Abstract: A method of manufacturing a nonostructure, which enables cylindrical pores arrayed according to any periodic pattern to be easily made on a substrate over a large area at a low cost in a short period of time. The method of manufacturing a structure having such pores includes the steps of preparing a substrate having recesses in its surface, providing a film on the surface of the substrate and anodizing the film.
    Type: Application
    Filed: July 1, 2003
    Publication date: January 1, 2004
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Ohkura, Tohru Den, Tatsuya Iwasaki
  • Publication number: 20030209651
    Abstract: The present invention provides a light-receiving device comprising, on a substrate, a first light-receiving part for detecting light of a first wavelength range, and a second light-receiving part for detecting light of a second wavelength range, wherein at least a part of incident light is transmitted through the first light-receiving part and then received by the second light-receiving part, and wherein the central wavelength of the first wavelength range is longer than the central wavelength of the second wavelength range.
    Type: Application
    Filed: May 5, 2003
    Publication date: November 13, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventor: Tatsuya Iwasaki
  • Publication number: 20030197456
    Abstract: The present invention discloses a carbon nanotube device comprising a support having a conductive surface and a carbon nanotube, one of whose terminus binds to the conductive surface so that conduction between the surface and the carbon nanotube is maintained, wherein a root of the carbon nanotube where the carbon nanotube binds to the conductive surface is surrounded by a wall. Such a carbon nanotube device, having carbon nanotubes with a uniform direction of growth, can generate a large quantity of emitted electrons when it is used as an electron emission device.
    Type: Application
    Filed: May 12, 2003
    Publication date: October 23, 2003
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tohru Den, Tatsuya Iwasaki
  • Publication number: 20030184664
    Abstract: Disclosed are an optical-path changing apparatus and a light radiating apparatus. The optical-path changing apparatus includes a light scattering member such as a light reflecting member, and a guide member for guiding the light scattering member. The direction of light scattered by the light scattering member is substantially constant during movement of the light scattering member guided by the guide member. The light radiating apparatus includes a fluorescent member, a guide member for guiding the fluorescent member, and a light emitting device for irradiating with light the fluorescent member moving along the guide member.
    Type: Application
    Filed: March 5, 2003
    Publication date: October 2, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventor: Tatsuya Iwasaki
  • Patent number: 6628053
    Abstract: The present invention discloses a carbon nanotube device comprising a support having a conductive surface and a carbon nanotube, one of whose terminus binds to the conductive surface so that conduction between the surface and the carbon nanotube is maintained, wherein a root of the carbon nanotube where the carbon nanotube binds to the conductive surface is surrounded by a wall. Such a carbon nanotube device, having carbon nanotubes with a uniform direction of growth, can generate a large quantity of emitted electrons when it is used as an electron emission device.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: September 30, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tohru Den, Tatsuya Iwasaki
  • Publication number: 20030179978
    Abstract: An optical transmission device includes a planar waveguide for transmitting an optical signal, a light emitting unit for inputting a light beam in the planar waveguide, and a setting unit for setting a propagation angle of a light beam transmitted in the planar waveguide. A plurality of light beams with different propagation angles are transmitted in the planar waveguide.
    Type: Application
    Filed: March 17, 2003
    Publication date: September 25, 2003
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tatsuya Iwasaki
  • Patent number: 6610463
    Abstract: A method of manufacturing a nanostructure which enables cylindrical pores arrayed according to any periodic pattern to be easily made on a substrate through a large area at a low cost in a short time. The method of manufacturing a structure having such pores has the steps of preparing a substrate having recesses in its surface, providing a film on a surface of the substrate, and anodizing the film.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: August 26, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Ohkura, Tohru Den, Tatsuya Iwasaki
  • Patent number: 6555957
    Abstract: In an electron beam apparatus comprising an enclosure in which an electron-emitting device having an electron-emitting region between opposite electrodes is disposed, the electron-emitting device exhibits such a characteristic as that an emission current is uniquely determined with respect to a device voltage. The interior of the enclosure is maintained under an atmosphere effective to prevent structural changes of the electron-emitting device. An image-forming apparatus comprises an enclosure in which an electron source and an image-forming member are disposed, the electron source comprising the above electron-emitting device. An emission current is stable with a very small change in the amount of electrons emitted, a sharp image is produced with high contrast, and gradation control is easily carried out.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: April 29, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ichiro Nomura, Masato Yamanobe, Hidetoshi Suzuki, Toshihiko Takeda, Tatsuya Iwasaki
  • Patent number: 6541386
    Abstract: Provided is a method for producing regularly ordered narrow pores excellent in linearity, and a structure with such narrow pores. A method for producing a narrow pore comprises a step of radiating a particle beam onto a workpiece, and a step of carrying out anodic oxidation of the workpiece having been irradiated with the particle beam, to form a narrow pore in the workpiece.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: April 1, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Aiba, Hidetoshi Nojiri, Taiko Motoi, Tohru Den, Tatsuya Iwasaki
  • Patent number: 6525461
    Abstract: Disclosed herein is a process for producing a narrow titanium-containing wire, comprising steps of: (i) providing a structure comprising a substrate having a titanium-containing surface and a porous layer containing narrow pores extending towards the surface; and (ii) forming narrow titanium-containing wires in the respective narrow pores by heat treatment of the structure obtained in the step (i).
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: February 25, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Iwasaki, Tohru Den