Patents by Inventor Yukio Tokuda

Yukio Tokuda 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: 20130141562
    Abstract: A microscope according to the present invention includes an imaging unit including a first illuminating unit, an imaging element, and a projection optical system, the first illuminating unit including a light source that illuminates a first object, the imaging element performing imaging of the first object, the projection optical system projecting an image of the first object onto the imaging element; a measuring unit configured to measure a second object for setting an imaging condition used when performing imaging of the second object at the imaging unit; and a controller configured to concurrently perform the imaging of the first object at the imaging unit and the measurement of the second object at the measuring unit.
    Type: Application
    Filed: August 5, 2011
    Publication date: June 6, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masashi Yano, Hirofumi Fujii, Michio Yanagisawa, Yukio Tokuda
  • Publication number: 20130033822
    Abstract: An image acquisition apparatus includes an imaging optical system configured to form an image of a subject, an imaging unit including an image sensor configured to capture the image of the subject formed by the imaging optical system, a cooler thermally connected to the image sensor, and a heat-transfer reduction unit with an opaque portion located between the imaging optical system and the imaging unit, wherein the opaque portion includes an aperture through which incident light to the image sensor passes.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 7, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tomofumi Nishikawara, Yukio Tokuda, Hisashi Namba
  • Publication number: 20120314050
    Abstract: An imaging apparatus comprises: a holding unit that holds a subject; a surface profile measuring unit that measures a surface profile of the subject; an imaging unit that adjusts an imaging plane according to the surface profile measured by the surface profile measuring unit and performs imaging of the subject; and a specifying unit that specifies a presence region in which an imaging object is present from an entire region of the subject. The surface profile measuring unit measures only the surface profile of the presence region specified by the specifying unit.
    Type: Application
    Filed: May 21, 2012
    Publication date: December 13, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryo Nawata, Michio Yanagisawa, Yukio Tokuda
  • Patent number: 7463334
    Abstract: An exposure apparatus is disclosed. The exposure apparatus has a projection optical system, aligns a reticle and a substrate and projects a pattern of the reticle to the substrate via the projection optical system to expose the substrate to light. The apparatus comprises a measuring device configured to perform measurement for the alignment, a first support configured to support the measuring device; and a second support configured to support the projection optical system. The first support and the second support are isolated from each other.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: December 9, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Tokuda
  • Publication number: 20080084547
    Abstract: An exposure apparatus is disclosed. The exposure apparatus has a projection optical system, aligns a reticle and a substrate and projects a pattern of the reticle to the substrate via the projection optical system to expose the substrate to light. The apparatus comprises a measuring device configured to perform measurement for the alignment, a first support configured to support the measuring device; and a second support configured to support the projection optical system. The first support and the second support are isolated from each other.
    Type: Application
    Filed: October 3, 2007
    Publication date: April 10, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yukio Tokuda
  • Patent number: 6493062
    Abstract: A driving apparatus for moving an object has a stage which moves the object mounted thereon, a base member supporting the stage, a reaction force reception structure for receiving a reaction force generated upon driving the stage, a damp member for damping transmission of vibration with a predetermined frequency range from the reaction force reception structure to a floor and an actuator for generating a force between the base member and the reaction force reception structure.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: December 10, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Tokuda, Nobuyoshi Deguchi, Shigeyuki Uzawa, Yukio Takabayashi, Hiromichi Hara
  • Publication number: 20020054280
    Abstract: This invention is to reduce the influence of vibration or swing due to movement of stages, and minimize the influence on other apparatuses set on the same floor by decreasing the influence of a reaction force according to acceleration/deceleration of the stages on the floor. A driving apparatus includes a movable stage on which an object to be exposed is mounted, a stage base member supporting the stage, and a reaction force reception structure which is different from the stage base member and receives a reaction force generated upon driving the stage. Transmission of vibration with a predetermined frequency or more is damped between the reaction force reception structure and a floor. The apparatus also has an elastic support elastically supporting the reaction force reception structure with respect to the floor or base frame, and a force actuator such as a linear motor for generating a force between the stage base member and the reaction force reception structure.
    Type: Application
    Filed: April 6, 1999
    Publication date: May 9, 2002
    Inventors: YUKIO TOKUDA, NOBUYOSHI DEGUCHI, SHIGEYUKI UZAWA, YUKIO TAKABAYASHI, HIROMICHI HARA
  • Patent number: 6320645
    Abstract: A stage system includes a movable stage, a guide mechanism for guiding the stage with respect to a predetermined direction, and a preloading mechanism for producing a magnetic attraction force with which the rigidity of the guide mechanism can be increased, wherein a portion to be attracted by the magnetic attraction force is made of a material having a product of a residual magnetic flux density Br and a holding force Hc in a hysteresis curve, not greater than 100 J/m3, this being very effective to reduce the hysteresis force, which is resistance due to the residual magnetic force, as compared with the preloading attraction force, whereby high precision positioning of the stage is accomplished.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: November 20, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mitsuru Inoue, Nobushige Korenaga, Yukio Tokuda
  • Patent number: 6320649
    Abstract: A stage system includes a movable stage having a static bearing and a magnet preloading mechanism, and a base having a guiding surface for guiding the movable stage. The base has an accumulated structure including a first layer of a magnetic material provided at the guiding surface, and a second layer of a non-magnetic material.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: November 20, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshikazu Miyajima, Yukio Tokuda
  • Patent number: 6103433
    Abstract: An exposure method includes holding a reticle fixed, holding a wafer fixed, irradiating the reticle with an exposure beam, projecting an image of the irradicated reticle onto the wafer through a projection optical system, and re-mounting the reticle as the temperature of the reticle reaches or exceeds a predetermined temperature.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: August 15, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yukio Tokuda
  • Patent number: 5691806
    Abstract: A projection lens, a reticle stage and a light source optical system are supported by a cast frame above a wafer stage for holding a wafer thereon. A top portion of the cast frame has an enclosed hollow structure in which strengthening ribs are built, thereby substantially increasing the rigidity of the top portion. Since the ribs are built in the top portion of the cast frame, the surface area exposed to the wafer stage is reduced. As a result, there is little chance that the wafer is contaminated by any adherents to the cast frame.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: November 25, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Tokuda, Yukio Takabayashi
  • Patent number: 5187519
    Abstract: An exposure apparatus for exposing a substrate with light from a light source has a stage for moving the substrate along a substantially horizontal plane, a base member for supporting the stage, and a frame member having at least three mounts for supporting the base member. A first actuator system having a plurality of first actuators provided in the mounts, respectively, moves the base member in a direction substantially parallel to the vertical direction. A second actuator system having at least one second actuator provided in at least one of the mounts moves the base member substantially along the horizontal plane. A control means is provided to control the first and second actuator systems in a such a way as to suppress vibration of the base member.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: February 16, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Takabayashi, Yukio Tokuda
  • Patent number: 4775877
    Abstract: A step-and-repeat type exposure apparatus includes an X-Y stage for moving stepwise a workpiece such as a wafer relative to a projection lens system so that images of a pattern of an original such as a reticle are transferred onto different areas on the wafer in sequence. After exposures of such areas of the wafer that are included in one of plural regions of the wafer, the position of the wafer relative to the X-Y stage is shifted. Then, exposures of the areas included in another region of the wafer are effected. In another aspect, the step-and-repeat exposures of the wafer are effected along a direction inclined to the moving directions of the X-Y stage.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: October 4, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masao Kosugi, Yukio Tokuda
  • Patent number: 4757355
    Abstract: A device for supplying masks to be used in a chamber having a wall, comprises an opening formed in the wall of the chamber, and a rotatable shelf disposed in the opening and for carrying thereon the masks. The rotatable shelf is coupled, by way of a rotational shaft, to a portion of the wall adjacent to the opening and the rotational shelf has a mask carrying portion which is rotationally movable, about the rotational shaft, through the opening to and from the inside of the chamber and from and to the outside of the chamber.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: July 12, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuo Iizuka, Yukio Tokuda, Masao Kosugi