Patents by Inventor Yukio Watanabe

Yukio Watanabe 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: 20100181498
    Abstract: [Technical Problem] To provide a differential evacuation system capable of easily maintaining, at a low cost, a large differential pressure between a light generation chamber and an illumination optical chamber in which optical processing, e.g. exposure, is performed by using extreme ultraviolet (EUV) light generated in the light generation chamber, and yet capable of sufficiently ensuring a desired optical path. [Solution to Problem] The differential evacuation system has a light generation chamber 10 that generates EUV light, an illumination optical chamber 100 in which optical processing is performed by using the EUV light generated in the light generation chamber 10, and a chamber connecting passage 150 that connects together the light generation chamber 10 and the illumination optical chamber 100 to guide the EUV light generated in the light generation chamber 10 into the illumination optical chamber 100.
    Type: Application
    Filed: December 4, 2009
    Publication date: July 22, 2010
    Applicants: Komatsu Ltd., Gigaphoton Inc.
    Inventors: Hiroshi Someya, Yukio Watanabe
  • Patent number: 7684306
    Abstract: There is provided an optical pickup apparatus that can obtain a stable servo signal by reducing stray light generated by diffraction in a recording layer other than a recording layer on which light is condensed. A hologram element provided in an optical pickup apparatus for recording information onto a recording medium and/or reproducing information on the recording medium by use of light includes fourth and fifth divisions where at least first-order diffracted light among diffracted light beams obtained by reflection and diffraction on a recording layer other than a light-condensed recording layer on which light is condensed by an objective lens so as not to be directed toward first and second light-receiving elements for detecting focus position information and third to eighth light-receiving elements for detecting track position information.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: March 23, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazunori Matsubara, Shinzoh Murakami, Tetsuo Ueyama, Kazuhiro Tsuchida, Yukio Watanabe, Osamu Miyazaki
  • Publication number: 20100051832
    Abstract: An EUV light source apparatus by which detachment of a chamber or a part of the chamber, movement to a maintenance area, and highly accurate placement relative to projection optics can be performed easily for maintenance of the EUV light source apparatus. The EUV light source apparatus is an apparatus for generating plasma by applying a laser beam to a target material within a chamber and entering EUV light radiated from the plasma into projection optics of exposure equipment, and includes a positioning mechanism for positioning the chamber or a maintenance unit of the chamber in a predetermined location where an optical axis of the collected extreme ultraviolet light and an optical axis of the projection optics of the exposure equipment are aligned, and a movement mechanism for moving the chamber or the maintenance unit of the chamber between the predetermined location and a maintenance area.
    Type: Application
    Filed: August 19, 2009
    Publication date: March 4, 2010
    Inventors: Toshihiro NISHISAKA, Yukio WATANABE, Osamu WAKABAYASHI, Kouji KAKIZAKI, Michio SHINOZAKI
  • Publication number: 20090201544
    Abstract: A communication apparatus includes: a communication section which executes a facsimile communication with a remote communication apparatus; a communication history control section which stores communication history information for each facsimile communication and controls a communication history; a log information storage section which stores log information relating to the facsimile communication by correlating to the communication history information; a code information generation section which generates code information being able to compress and display the log information; a print data generation section which generates print data for printing the communication history information and the code information of the log information correlated to the communication history information on a recording sheet such that the communication history information and the log information are comparable on the recording sheet; and a print section which prints the print data.
    Type: Application
    Filed: January 27, 2009
    Publication date: August 13, 2009
    Inventors: Shunichi Kumakura, Motoaki Aoyama, Yukio Watanabe
  • Patent number: 7573801
    Abstract: An optical pickup includes a hologram element. The hologram element is provided with a hologram pattern including a splitting section for focus which splits light used for the detection of an FES and a splitting section for tracking which splits light used for the detection of a TES. The splitting section for tracking is formed in a region excluding a region interposed between a first virtual straight line and a second virtual straight line. The first virtual straight line is drawn on the hologram element in parallel to an X direction and passes through an optical axis of reflected light entering the hologram element in a state where the objective lens is in a neutral position, and the second virtual straight line is drawn in parallel to the first virtual straight line, while being spaced at a distance d from the first virtual straight line.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: August 11, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukio Watanabe, Tetsuo Ueyama, Osamu Miyazaki, Kazunori Matsubara, Shinzoh Murakami, Kazuhiro Tsuchida
  • Publication number: 20080268558
    Abstract: A high-luminance light emitting element is manufactured by a method comprising: forming a light emitting layer on a first surface of a GaP substrate including the first surface and a second surface opposed to the first surface and having an area smaller than the first area, the light emitting layer emitting light of a wavelength ? permitted to pass through the GaP substrate; forming a plurality of side surfaces on the GaP substrate to be respectively aslant by substantially the same angle to become narrower toward the second surface; and forming a plurality of depressions and protrusions as high as 0.1? to 3? on the side surfaces.
    Type: Application
    Filed: October 19, 2007
    Publication date: October 30, 2008
    Inventors: Hideto Sugawara, Yukio Watanabe, Hirohisa Abe, Kuniaki Konno
  • Publication number: 20080259403
    Abstract: An image processing apparatus including: an image reading section which reads an image containing a watermark having a hidden image and generates image data; and an image processing section which adds, onto the image data, information about image processing for preventing the watermark from being formed as a visible image when the image is reproduced based on the image data.
    Type: Application
    Filed: February 15, 2008
    Publication date: October 23, 2008
    Inventors: Minoru YAGUCHI, Shunichi Kumakura, Motoaki Aoyama, Yukio Watanabe
  • Publication number: 20080176353
    Abstract: A high-luminance light emitting element is manufactured by a method comprising: forming a light emitting layer on a first surface of a GaP substrate including the first surface and a second surface opposed to the first surface and having an area smaller than the first area, the light emitting layer emitting light of a wavelength ? permitted to pass through the GaP substrate; forming a plurality of side surfaces on the GaP substrate to be respectively aslant by substantially the same angle to become narrower toward the second surface; and forming a plurality of depressions and protrusions as high as 0.1? to 3? on the side surfaces.
    Type: Application
    Filed: October 19, 2007
    Publication date: July 24, 2008
    Inventors: Hideto Sugawara, Yukio Watanabe, Hirohisa Abe, Kuniaki Konno
  • Publication number: 20080062826
    Abstract: An optical pickup device includes: a splitting section for splitting a beam; a light-receiving section for receiving the split beams. The light-receiving section includes: a tracking-use main light-receiving region and tracking-use sub light-receiving regions, and auxiliary light-receiving regions. Each of the auxiliary light-receiving regions receives only a light beam reflected off a recording layer other than a recording layer subjected to an information writing/reading process. A light-receiving area of each of the auxiliary light-receiving area is smaller than a light-receiving area of each tracking-use light-receiving region. Further, an optical pickup device includes: a splitting section for splitting a beam; and a light-receiving section for receiving the split beams. The light-receiving section includes a sub light-receiving regions for receiving tracking-use sub beams.
    Type: Application
    Filed: April 27, 2005
    Publication date: March 13, 2008
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Osamu Miyazaki, Keiji Sakai, Yukio Watanabe
  • Publication number: 20080050854
    Abstract: A high-luminance light emitting element is manufactured by a method comprising: forming a light emitting layer on a first surface of a GaP substrate including the first surface and a second surface opposed to the first surface and having an area smaller than the first area, the light emitting layer emitting light of a wavelength ? permitted to pass through the GaP substrate; forming a plurality of side surfaces on the GaP substrate to be respectively aslant by substantially the same angle to become narrower toward the second surface; and forming a plurality of depressions and protrusions as high as 0.1? to 3? on the side surfaces.
    Type: Application
    Filed: October 19, 2007
    Publication date: February 28, 2008
    Inventors: Hideto Sugawara, Yukio Watanabe, Hirohisa Abe, Kuniaki Konno
  • Publication number: 20080018969
    Abstract: An optical integrated unit includes a light-emitting portion for emitting a plurality of laser beams having different wavelengths, a wave plate, a polarization hologram element for diffracting a first laser beam emitted from a light source, and a non-polarization hologram element for diffracting a second laser beam emitted from a light source. Wave plate is formed to act as a ?/4 plate for the first laser beam and act as a ? plate or a ?/2 plate for the second laser beam.
    Type: Application
    Filed: January 11, 2005
    Publication date: January 24, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Keiji Sakai, Renzaburoh Miki, Yukio Watanabe, Osamu Miyazaki
  • Publication number: 20080008640
    Abstract: The intention is to clarify characteristics of a cluster-free amorphous silicon film which is practically produceable without incorporation of large clusters having a size of 1 nm or more, and provide a method and an apparatus for producing the amorphous silicon film. In the cluster-free amorphous silicone (a-Si:H) film, an in-film Si—H2 bond density is 10?2 atomic % or less, and an in-film volume fraction of the large clusters is 10?1% or less. The a-Si:H film is produced by depositing, on a substrate, a deposition material in a plasma flow of any one of a silane gas, a disilane gas and a gas obtained by diluting a silane or disilane gas with one or a combination of two or more selected from the group consisting of hydrogen, Ar, He, Ne and Xe. The a-Si:H film has prominent characteristics, such that: a light-induced defect density is reduced from 2×1016 cm?3 or more in conventional a-Si:H films to substantially zero; a stabilized efficiency (%), i.e.
    Type: Application
    Filed: August 17, 2005
    Publication date: January 10, 2008
    Inventors: Yukio Watanabe, Masaharu Shiratani, Kazunori Koga
  • Publication number: 20070159954
    Abstract: In a light-emitting section (2) for emitting semiconductor laser for CD (4) and semiconductor laser for DVD (5), a radiation angle width ?2 of the DVD semiconductor laser (5) is at least 1.3 times a radiation angle width ?1 of the CD semiconductor laser (4), said radiation angle width being defined as a width of an angle created by two straight lines, which extend respectively from a laser-emitting point to two points where a radiation intensity of laser becomes half of an intensity of the center of laser, which points reside within a plane parallel to a pn junction plane.
    Type: Application
    Filed: January 28, 2005
    Publication date: July 12, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Keiji Sakai, Renzaburoh Miki, Yukio Watanabe, Osamu Miyazaki
  • Publication number: 20070108169
    Abstract: A laser peening apparatus for manufacturing a rotor using an electrical steel sheet with low iron loss for enabling high speed rotation of a motor. The laser peening apparatus includes a laser irradiating device for irradiating with a laser through a liquid the rotor made of an electrical steel sheet with low iron loss, and a drive device for moving the rotor relative to an irradiation spot of the laser so that the laser irradiates along a bridge side on an inner circumference of a magnet insertion window of the rotor.
    Type: Application
    Filed: September 21, 2004
    Publication date: May 17, 2007
    Inventors: Munekatsu Shimada, Hideaki Ono, Takae Ono, Tetsurou Tayu, Makoto Kano, Yu Owada, Naoshi Sakata, Kimihiro Shibata, Toshimitsu Matsuoka, Nobuhiko Tanaka, Yukio Watanabe, Yuji Sano, Hironobu Kimura
  • Patent number: 7218599
    Abstract: Regional borderlines that are the borderlines between the first region and the second region on a diffraction grating of an optical pickup partially overlap a group of y-axis parallel borderlines that are borderlines between pattern A and pattern B that are parallel to a direction parallel to the y-axis.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: May 15, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukio Watanabe, Tetsuo Ueyama
  • Publication number: 20070081431
    Abstract: A grating (3) including first and second regions (B1 and B2) through which the light beams, having wavelengths ?1 and ?2, respectively, pass, each of the regions including a region having diffraction grooves whose concavoconvex pitches are partially shifted so that a pattern is provided to cause each of the first and second light beams to have a partial phase shift. The pattern is set so that amplitudes of push-pull signals of the sub-beams are substantially cancelled in each of the light beams having different wavelengths. With this, it is possible to provide an optical pickup (i) having a plurality having different light sources in one package, (ii) capable of realizing low cost in the case in which the optical pickup carries out track detection using three beams with respect to any optical discs, such as DVDs and CDs, and (iii) capable of realizing simplifications of assembly adjustment and the pickup.
    Type: Application
    Filed: March 23, 2004
    Publication date: April 12, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yukio Watanabe, Tetsuo Ueyama
  • Publication number: 20070053270
    Abstract: An optical pickup device has a semiconductor laser emitting light which is in turn branched via a diffraction grating into at least three beams of light including a main beam and two sub beams which are in turn condensed via an objective lens on an optical disk at a guide groove and reflected by the optical disk to provide three reflections of light which are in turn received by detectors, each divided into two regions, respectively, to generate a tracking error signal. The diffraction grating is divided into three regions including a first region, a second region and a third region located intermediate therebetween, each having a periodical structure out of phase, the periodical structure having grating grooves in a direction determined depending on the phase of the second region to incline relative to a direction perpendicular to the guide groove of the optical disk.
    Type: Application
    Filed: July 28, 2006
    Publication date: March 8, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Tetsuo Ueyama, Osamu Miyazaki, Yukio Watanabe, Yasuo Nakata, Tomio Mashiyama
  • Publication number: 20070053272
    Abstract: An optical pickup includes a hologram element. The hologram element is provided with a hologram pattern including a splitting section for focus which splits light used for the detection of an FES and a splitting section for tracking which splits light used for the detection of a TES. The splitting section for tracking is formed in a region excluding a region interposed between a first virtual straight line and a second virtual straight line. The first virtual straight line is drawn on the hologram element in parallel to an X direction and passes through an optical axis of reflected light entering the hologram element in a state where the objective lens is in a neutral position, and the second virtual straight line is drawn in parallel to the first virtual straight line, while being spaced at a distance d from the first virtual straight line.
    Type: Application
    Filed: August 28, 2006
    Publication date: March 8, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yukio Watanabe, Tetsuo Ueyama, Osamu Miyazaki, Kazunori Matsubara, Shinzoh Murakami, Kazuhiro Tsuchida
  • Patent number: 7184384
    Abstract: An optical pickup converts a laser beam from a semiconductor laser (1) into a parallel ray with a collimator lens (2), and divides it into a main beam (30), a sub-beam (+1st order component) (31), and a sub-beam (?1st order component) (32) with a gradient multiple-division type phase difference grating (3). After passing through a beam splitter (4), an objective lens (5) condenses the light beams on a track (61) of an optical disc (6), and the reflected light that has passed through the objective lens 5 is reflected at the beam splitter (4) and is guided into optical detectors (8A, 8B, and 8C) by a condensing lens (7). Accordingly, in a tracking error signal detecting method using the push-pull signals of the main beam and sub-beams, an offset produced by an objective lens shift or a disc tilt can be cancelled at low cost without lowering the efficiency of using light.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: February 27, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuo Ueyama, Keiji Sakai, Renzaburou Miki, Osamu Miyazaki, Yukio Watanabe
  • Publication number: 20070025228
    Abstract: There is provided an optical pickup apparatus that can obtain a stable servo signal by reducing stray light generated by diffraction in a recording layer other than a recording layer on which light is condensed. A hologram element provided in an optical pickup apparatus for recording information onto a recording medium and/or reproducing information on the recording medium by use of light includes fourth and fifth divisions where at least first-order diffracted light among diffracted light beams obtained by reflection and diffraction on a recording layer other than a light-condensed recording layer on which light is condensed by an objective lens so as not to be directed toward first and second light-receiving elements for detecting focus position information and third to eighth light-receiving elements for detecting track position information.
    Type: Application
    Filed: July 31, 2006
    Publication date: February 1, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazunori Matsubara, Shinzoh Murakami, Tetsuo Ueyama, Kazuhiro Tsuchida, Yukio Watanabe, Osamu Miyazaki