Patents by Inventor Hiroyuki Ichikawa

Hiroyuki Ichikawa 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: 7735129
    Abstract: A firewall apparatus including plural virtual firewalls, each virtual firewall including a dependent firewall policy, is disclosed. The firewall apparatus includes: a distribution management table for managing a user name and a virtual firewall ID; a part configured to receive authentication information for network connection from a user terminal, and hold a user name included in the authentication information; a part configured to report the authentication information to the authentication server; and a part configured to receive an authentication response from the authentication server, and hold a user ID, included in the authentication response, to be provided to the user terminal. The firewall apparatus registers the user ID in the distribution management table associating the user ID with the user name.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: June 8, 2010
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kazuhiko Nagata, Taisuke Oka, Ryoichi Suzuki, Takashi Ikegawa, Hiroyuki Ichikawa, Tadashi Ishikawa
  • Patent number: 7713805
    Abstract: A method of manufacturing a silicon carbide semiconductor device having a MOS structure includes preparing a substrate made of silicon carbide, and forming a channel region, a first impurity region, a second impurity region, a gate insulation layer, and a gate electrode to form a semiconductor element on the substrate. In addition, a film is formed on the semiconductor element to provide a material of an interlayer insulation layer, and a reflow process is performed at a temperature about 700° C. or over in an wet atmosphere so that the interlayer insulation layer is formed from the film and an edge portion of the gate electrode is rounded and oxidized.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: May 11, 2010
    Assignee: DENSO CORPORATION
    Inventors: Hiroki Nakamura, Hiroyuki Ichikawa, Eiichi Okuno
  • Patent number: 7706924
    Abstract: A vibration controller includes a map controller, an adaptive controller, a set-up frequency judge/switcher, and an actuator. The map controller includes a data map storage for storing data on control signals determined in advance for a vibration insulator, and a signal generator for selecting one of the data, depending on a frequency of a cyclically pulsating signal emitted from a vibration generating source of a vehicle, from the data map storage and generating a control signal. The adaptive controller generates the control signal with respect to the cyclically pulsating signal using an adaptive control method. The set-up frequency judge/switcher switches from the map controller to the adaptive controller or vice versa based on the frequency of the cyclically pulsating signal. The actuator actuates an actuator of the vibration insulator based on the control signal generated by the map controller or the adaptive controller, whereby inhibiting the vehicle from vibrating.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: April 27, 2010
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Atsushi Muramatsu, Takayoshi Yasuda
  • Patent number: 7645658
    Abstract: A method of manufacturing a silicon carbide semiconductor device having a MOS structure includes preparing a substrate made of silicon carbide, and forming a channel region, a first impurity region, a second impurity region, a gate insulation layer, and a gate electrode to form a semiconductor element on the substrate. In addition, a film is formed on the semiconductor element to provide a material of an interlayer insulation layer, and a reflow process is performed at a temperature about 700° C. or over in an wet atmosphere so that the interlayer insulation layer is formed from the film. Furthermore, a dehydration process is performed at about 700° C. or lower in an inert gas atmosphere after the reflow process is performed.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: January 12, 2010
    Assignee: DENSO CORPORATION
    Inventors: Hiroki Nakamura, Hiroyuki Ichikawa, Eiichi Okuno
  • Publication number: 20090317752
    Abstract: The present invention provide with a rinse solution for lithography and a resist pattern forming method using the same, which can prevent an inclination and peeling-off of a resist pattern and form a resist pattern having a high aspect ratio with high reproducibility. The rinse solution for lithography of the present invention comprises water and a nonionic surfactant having an ethyleneoxy group but not having a fluorine atom. The resist forming method of the present invention comprises the step of rinsing the pattern after development treatment with the rinse solution for lithography.
    Type: Application
    Filed: August 27, 2009
    Publication date: December 24, 2009
    Inventors: Masakazu Kobayashi, Hiroyuki Ichikawa, Yoshiaki Yamada, Keiichi Tanaka
  • Publication number: 20090252022
    Abstract: A method of manufacturing a synthetic resin lens, comprising: adjusting a degree of change in transmittance of a lens member made of synthetic resin for a blue violet laser beam with accumulated application of the blue violet laser beam, by applying to the lens member an electromagnetic wave shorter in wavelength than the blue violet laser beam.
    Type: Application
    Filed: May 19, 2009
    Publication date: October 8, 2009
    Applicants: Sanyo Electric Co., Ltd., Sanyo Optec Design Co., Ltd.
    Inventors: Tohru Hotta, Ryoichi Kawasaki, Hiroyuki Ichikawa
  • Patent number: 7596162
    Abstract: The present invention is to provide a method for producing a semiconductor laser diode (LD) with an enhanced ESD resistance. The method includes a step for forming an aluminum film on a facet of the LD and a step for forming an aluminum oxide film on the aluminum film. The underlying aluminum film is oxidized during the formation of the aluminum oxide film to form a double aluminum oxide layer. The ratio of the oxide composition of the underlying aluminum oxide film is smaller than that of the upper aluminum oxide film.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: September 29, 2009
    Assignee: Sumitomo Electric Industries Ltd.
    Inventors: Chie Fukuda, Hiroyuki Ichikawa
  • Patent number: 7587406
    Abstract: An information processor for preventing information contained in a file, which has a first area storing first data, a second area storing second data and a third area, from being lost when a format of the file is transformed includes extension unit for extending the second area, a first storage for storing the first data, which is stored in the first area, in the third area, a format analyzer for reconstructing the second data stored in the second area on the basis of a first format and an extended area storage for storing the reconstructed second data in the extended second area.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: September 8, 2009
    Assignee: Sony Corporation
    Inventors: Mitsuru Katsumata, Ichiro Sato, Hiroyuki Ichikawa, Haruki Hayakawa
  • Patent number: 7549176
    Abstract: In a CD-DA, encoded content in which audio information is encoded using a content key, the content key, and two usage right files are recorded in predetermined regions. The usage right files are a CD-DA usage right file having CD-DA usage rights, and a CD-R usage right file having CD-R usage rights. The usage rights recorded in the CD-DA usage right file regulate the usage on a CD-DA.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: June 16, 2009
    Assignee: Sony Corporation
    Inventors: Munetake Ebihara, Takamichi Hayashi, Mitsuru Katsumata, Hiroyuki Ichikawa
  • Publication number: 20090101100
    Abstract: An internal combustion engine for a vehicle comprises a pair of intake collectors (3A, 3B) and a communicating pipe (13) connecting the pair of intake collectors (3A, 3B). A negative pressure supply port (15) supplying intake negative pressure of the internal combustion engine to a brake booster is provided at an end of the communicating pipe (13). By providing an air amount deviation compensating arrangement which compensates for a deviation in the amounts of air flowing into the pair of intake collectors (3A, 3B) from the brake booster when braking of the vehicle is released, the amounts of air supplied to the internal combustion engine from the pair of the intake collectors (3A, 3B) are equalized.
    Type: Application
    Filed: September 17, 2008
    Publication date: April 23, 2009
    Inventor: Hiroyuki ICHIKAWA
  • Publication number: 20090022038
    Abstract: An objective lens formed of a synthetic resin material having characteristics of substantially not reducing transmittance of the objective lens when a first laser beam having a first wavelength passes through the objective lens, and reducing the transmittance according to an elapsed time to apply a second laser beam when the second laser beam having a second wavelength shorter than the first wavelength and longer than a wavelength of ultraviolet light passes through the objective lens, the objective lens being irradiated with the ultraviolet light in advance for a predetermined time such that a change in the transmittance for the second laser beam is set within a predetermined range.
    Type: Application
    Filed: July 17, 2008
    Publication date: January 22, 2009
    Applicants: SANYO ELECTRIC CO., LTD., SANYO OPTEC DESIGN CO., LTD.
    Inventors: Tohru Hotta, Ryoichi Kawasaki, Hiroyuki Ichikawa
  • Publication number: 20080315211
    Abstract: A SiC device includes: a substrate; a drift layer; a base region; a source region; a channel layer connecting the drift layer and the source region; a gate oxide film on the channel layer and the source region; a gate electrode on the gate oxide film; an interlayer insulation film with a contact hole having a barrier layer and a BPSG insulation film on the gate electrode; a source electrode having upper and lower wiring electrodes on the interlayer insulation film and in the contact hole for connecting the base region and the source region; and a drain electrode on the substrate. The barrier layer prevents a Ni component in the lower wiring electrode from being diffused into the BPSG insulation film.
    Type: Application
    Filed: May 13, 2008
    Publication date: December 25, 2008
    Applicant: DENSO CORPORATION
    Inventors: Hiroyuki Ichikawa, Hideki Kawahara, Hiroki Nakamura
  • Patent number: 7409268
    Abstract: A method for actuating active vibration insulators includes the steps of generating an idling control signal in an idling range of a vehicle, generating a running control signal in a running range of the vehicle, and actuating an electromagnetic actuator of an active vibration insulator based on the idling control signal or the running control signal, thereby inhibiting vibrations of a vehicle engine from transmitting by the electromagnetic actuator. The idling control signal is produced by adding a higher order harmonic signal component with respect to a control frequency, based on a cyclic pulsating signal emitted from the vehicle engine, to a fundamental-wave signal component of the control frequency. The running control signal is composed of the fundamental-wave signal component of the control signal. The method can inhibit noises from generating by actuating simple electromagnetic actuators, and can damp vibrations of vehicle engines simply and less expensively.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: August 5, 2008
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Takayoshi Yasuda
  • Patent number: 7403367
    Abstract: An active vibration insulator includes an electromagnetic actuator, a control-signals generating device, a driver, a calculator, and a judging device. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The control-signals generating device generates cyclic control signals based on cyclic pulsating signals output from a vibration generating source of a vehicle. The cyclic control signals actively inhibit vibrations generated by the vibration generating source from transmitting to a specific part of the vehicle. The driver drives the electromagnetic actuator by making the electric-current supplies variable based on the cyclic control signals. The calculator calculates an estimated transfer function composed of estimated values of a transfer function for a transfer system including the electromagnetic actuator and the driver. The judging device judges an inoperative malfunction of the electromagnetic actuator based the estimated transfer function.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: July 22, 2008
    Assignees: Tokai Rubber Industries, Ltd, Aisin Seiki Kabushiki Kaisha
    Inventors: Takayoshi Yasuda, Hideki Oshima, Hiroyuki Ichikawa, Daichi Mizushima, Takehiko Fushimi, Kenichi Sato
  • Publication number: 20080151722
    Abstract: This invention provides an optical disc device and method for discriminating between DVD and HD-DVD more rapidly. After an optical pickup has been stopped above a data region on the optical disc, a tracking error signal generator acquires amplitude “Vdpp” based on a DPP method and amplitude “Vdpd” based on a DPD method as tracking error signals. A disc discriminator discriminates the kind of optical disc by comparing the acquired “Vdpp” and “Vdpd” data with a threshold level “Vth”. Alternatively, the optical pickup is stopped above the data region and a system lead-in region on the optical disc, and then amplitude values “Vdata” and “Vlead” of tracking error signals are acquired and compared.
    Type: Application
    Filed: August 13, 2007
    Publication date: June 26, 2008
    Applicant: Hitachi-LG Data Storage, Inc.
    Inventors: Satoshi Hara, Takeshi Imai, Toshio Saitoh, Hiroyuki Ichikawa
  • Publication number: 20080102591
    Abstract: A method of manufacturing a silicon carbide semiconductor device having a MOS structure includes preparing a substrate made of silicon carbide, and forming a channel region, a first impurity region, a second impurity region, a gate insulation layer, and a gate electrode to form a semiconductor element on the substrate. In addition, a film is formed on the semiconductor element to provide a material of an interlayer insulation layer, and a reflow process is performed at a temperature about 700° C. or over in an wet atmosphere so that the interlayer insulation layer is formed from the film and an edge portion of the gate electrode is rounded and oxidized.
    Type: Application
    Filed: October 23, 2007
    Publication date: May 1, 2008
    Applicant: DENSO CORPORATION
    Inventors: Hiroki Nakamura, Hiroyuki Ichikawa, Eiichi Okuno
  • Publication number: 20080102585
    Abstract: A method of manufacturing a silicon carbide semiconductor device having a MOS structure includes preparing a substrate made of silicon carbide, and forming a channel region, a first impurity region, a second impurity region, a gate insulation layer, and a gate electrode to form a semiconductor element on the substrate. In addition, a film is formed on the semiconductor element to provide a material of an interlayer insulation layer, and a reflow process is performed at a temperature about 700° C. or over in an wet atmosphere so that the interlayer insulation layer is formed from the film. Furthermore, a dehydration process is performed at about 700° C. or lower in an inert gas atmosphere after the reflow process is performed.
    Type: Application
    Filed: October 23, 2007
    Publication date: May 1, 2008
    Applicant: DENSO CORPORATION
    Inventors: Hiroki Nakamura, Hiroyuki Ichikawa, Eiichi Okuno
  • Publication number: 20080089377
    Abstract: The present invention is to provide a method for producing a semiconductor laser diode (LD) with an enhanced ESD resistance. The method includes a step for forming an aluminum film on a facet of the LD and a step for forming an aluminum oxide film on the aluminum film. The underlying aluminum film is oxidized during the formation of the aluminum oxide film to form a double aluminum oxide layer. The ratio of the oxide composition of the underlying aluminum oxide film is smaller than that of the upper aluminum oxide film.
    Type: Application
    Filed: August 31, 2007
    Publication date: April 17, 2008
    Inventors: Chie Fukuda, Hiroyuki Ichikawa
  • Patent number: 7281522
    Abstract: An acceleration sensor state detecting apparatus for detecting a state of an acceleration sensor provided at a vibrating body includes a calculating method for calculating a difference between measured results of the acceleration sensor obtained per first predetermined time that is shorter than a vibration period of the vibrating body, and a determining method for determining that the acceleration sensor is in an error state in a case that a state in which the difference calculated falls into a range between a predetermined upper limit value and a predetermined lower limit value continues for a second predetermined time or more.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: October 16, 2007
    Assignees: Aisin Seiko Kabushiki Kaisha, Tokai Rubber Industries, Ltd.
    Inventors: Kenichi Sato, Kentaro Hirose, Hiroyuki Ichikawa
  • Patent number: 7276823
    Abstract: An active vibration damping device having a solenoid actuator designed with a movable element positioned inserted into a guide hole of a stator having a yoke member is attached about a coil to form a stator-side magnetic path with the guide hole lying on its center axis, so that current passed through the coil creates actuating force in the axial direction between the stator and the movable element. A magnetic acting force stabilizing portion having a shape that gradually varies in association with axial displacement of the movable element an level of magnetic acting force between a movable element-side magnetic pole forming portion and a stator-side magnetic pole forming portion is disposed on the movable element-side magnetic pole forming portion where a magnetic pole is produced in the movable element and/or the stator-side magnetic pole forming portion where a magnetic pole is produced in the stator.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: October 2, 2007
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Yoshinori Watanabe