Patents by Inventor Masaki Nakano

Masaki Nakano 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: 20100025223
    Abstract: Offset in the ejection direction of target material droplets is corrected in order to stabilize EUV output in an EUV light source device. An extreme ultraviolet light source device includes a droplet generation device 110 that outputs target material droplets 101 towards a predetermined plasma emission point 103; a charging device 130 that charges the target material droplets 101; a trajectory correction device 140 that generates a force field in the trajectory to correct the travel direction of the charged target material droplets 101a so that the charged target material droplets 101a travel towards the plasma emission point 103; and a laser light source 150 that irradiates, at the plasma emission point 103, a laser beam onto the charged target material to generate plasma thereby.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 4, 2010
    Applicants: Komatsu Ltd., Gigaphoton Inc.
    Inventors: Tatsuya Yanagida, Masaki Nakano, Akira Endo
  • Publication number: 20100020664
    Abstract: A recording strategy for specifying an output waveform of a laser beam to be applied to a recording layer of an information recording medium is adjusted by the following recording strategy adjusting method. The recording strategy adjusting method includes a base strategy determining step of determining a basic recording strategy; a first top pulse width setting step wherein the shortest mark in a pattern row formed on the recording layer of the information recording medium is specified after the base strategy determining step, and the width of a top pulse, i.e., a pulse for recording the shortest mark, is set; and a step of adjusting a power, including a recording power and a bias power, for recording.
    Type: Application
    Filed: January 18, 2008
    Publication date: January 28, 2010
    Applicant: NEC CORPORATION
    Inventors: Masaki Nakano, Masatsugu Ogawa
  • Publication number: 20100014406
    Abstract: An optical disc apparatus according to the present invention includes a recording strategy adjusting section having an initial value setting section; an output level setting section; and a pulse width setting section. The initial value setting section sets initial values of pulse widths and output levels of a laser beam as a basic recording strategy. Also, the output level setting section adjusts output levels of the recording strategy with a plurality of first adjustment laser beams that are outputted by changing the output levels of the basic recording strategy. Also, the pulse width setting section adjusts the output levels of the recording strategy with a plurality of second adjustment laser beams that are outputted by fixing the output levels set by the initial value setting section, and changing the pulse widths of the basic recording strategy.
    Type: Application
    Filed: January 25, 2008
    Publication date: January 21, 2010
    Inventors: Masatsugu Ogawa, Masaki Nakano
  • Publication number: 20100002554
    Abstract: An optical disk device includes an optical head unit, a drive means and a recording surface state determination means, and determines the type of an optical disk based on a state of the information recording surface. The information recording surface includes a management region on which management information is recorded and formed by a guiding groove or a prepit sequence and a data recording region on which a user data is recorded and on which a track formed by a guiding groove or a prepit sequence. The optical head unit irradiates a focused beam onto the information recording surface of an optical disk which rotates. The drive means drives to move the focused beam along a radial direction of the optical disk by driving the optical head unit. The recording surface state determination means determines a state of the information recording surface based on a reflected light of the focused beam.
    Type: Application
    Filed: December 5, 2007
    Publication date: January 7, 2010
    Inventors: Masaki Nakano, Masatsugu Ogawa, Shuichi Ohkubo
  • Patent number: 7636287
    Abstract: Reproduced signals are equalized by the least square technique by using a predetermined number of data samples binarized by a Viterbi decoder. Even when data written on an optical disk is unknown, the data can be equalized in a stable manner and can be reproduced at a low error rate without instability factors such as divergence due to interference.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: December 22, 2009
    Assignees: NEC Corporation, Kabushiki Kaisha Toshiba
    Inventors: Shuichi Ohkubo, Hiromi Honma, Masatsugu Ogawa, Masaki Nakano, Toshiaki Iwanaga, Yutaka Kashihara, Yuji Nagai, Akihito Ogawa
  • Patent number: 7615766
    Abstract: A target supplier accelerates a target material injected from a nozzle such that a velocity of the target material after accelerated is kept within a predetermined range. The target supplier includes: a target nozzle that injects a target material in a liquid droplet state or solid particle state; an electric charge supplying unit that supplies electric charge to the target material; a charge amount measuring unit that measures an amount of the electric charge supplied to the target material by the electric charge supplying unit; a control unit that controls the electric charge supplying unit in a feedback manner based on a measurement result obtained by the charge amount measuring unit; and an accelerator that accelerates the target material supplied with the electric charge by the electric charge supplying unit.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: November 10, 2009
    Assignees: Komatsu Ltd., Gigaphoton Inc.
    Inventor: Masaki Nakano
  • Publication number: 20090274024
    Abstract: The optical information recording/reproducing unit distinguishes an unrecorded area of a set optical disc (step A100). Thereafter, recording is performed in the unrecorded area under a plurality of recording conditions wherein the recording power is changed with a bias power being constant, to select a recording power providing an optimum reproduced-signal quality (step B100). Subsequently, recording is performed using the selected recording power under a plurality of recording conditions wherein the recording power is fixed onto the selected recording power and the bias power is changed, to select a bias power providing an optimum reproduced-signal quality (step C100). The selected recording power and the selected bias power are set as the recording-use optical irradiation power and bias power, respectively (step D100).
    Type: Application
    Filed: September 14, 2007
    Publication date: November 5, 2009
    Inventors: Masaki Nakano, Masatsugu Ogawa
  • Publication number: 20090268589
    Abstract: A method for calibrating a recording condition in an information recording unit includes: heating a recorded data pattern recorded on the information recording medium; reproducing the recorded data pattern after the heating, to measure a reproduced-signal quality; and determining a recording condition based on the measured reproduced-signal quality.
    Type: Application
    Filed: March 26, 2009
    Publication date: October 29, 2009
    Inventors: Masaki NAKANO, Masatsugu OGAWA
  • Patent number: 7608846
    Abstract: An EUV (extreme ultra violet) light source device in which a degree of vacuum or cleanness in a plasma generation chamber is improved while the construction is simplified. The device includes a first chamber; a second chamber connected to the first chamber through an opening portion; a target supplier that supplies a target material into the first chamber; a droplet generating unit that generates droplets of the target material of molten metal repetitively dropping based on the target material supplied by the target supplier; a blocking unit that prevents the droplets of the target material generated by the droplet generating unit from passing through the opening portion; control unit that controls the blocking unit to operate at predetermined timing; a laser light source; and an optical system that leads a laser beam to the droplets of the target material introduced into the second chamber.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: October 27, 2009
    Assignees: Komatsu Ltd., Gigaphoton Inc.
    Inventor: Masaki Nakano
  • Patent number: 7608969
    Abstract: A stator for a rotary electric machine, including a plurality of stator cores arranged in a circumferentially spaced relation about a central axis of the stator, and a molded resin filled between the adjacent stator cores. Each of the stator cores includes a meshing portion which is meshed with the molded resin and formed on circumferentially opposed side surfaces of the stator core. The stator core includes a plurality of stator segments laminated along a direction of the central axis so as to form the meshing portion.
    Type: Grant
    Filed: September 20, 2005
    Date of Patent: October 27, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenta Suzuki, Masaki Nakano, Takashi Kato, Hisayuki Furuse, Tomoya Imazu
  • Publication number: 20090218522
    Abstract: In an LPP type EUV light source apparatus, the intensity of radiated EUV light is stabilized by improving the positional stability of droplets. The extreme ultra violet light source apparatus includes: a chamber in which extreme ultra violet light is generated; a target supply division including a target tank for storing a target material therein and an injection nozzle for injecting the target material in a jet form, for supplying the target material into the chamber; a charging electrode applied with a direct-current voltage between the target tank and itself, for charging droplets when the target material in the jet form injected from the injection nozzle is broken up into the droplets; a laser for applying a laser beam to the droplets of the target material to generate plasma; and a collector mirror for collecting extreme ultra violet light radiated from the plasma to output the extreme ultra violet light.
    Type: Application
    Filed: February 18, 2009
    Publication date: September 3, 2009
    Inventors: Masaki NAKANO, Akira Endo
  • Publication number: 20090164179
    Abstract: The soil-water coupled analysis program of the invention computes a global L matrix and a modified global L matrix regarding a volume change rate of a soil skeleton over time, a global H matrix regarding a water permeability of soil, a global M matrix regarding a mass, and a global K matrix regarding a tangent stiffness of the soil skeleton, based on input settings of soils, such as clay, intermediate soil, and sand, to respective elements of a soil foundation, input settings of a solid soil model, and input settings of analysis conditions (steps S140 to S165). The soil-water coupled analysis program formulates a global tangent stiffness equation (simultaneous linear equations) using all these computed matrixes and determines an unknown ‘jerk field’ and a ‘pore water pressure field’ under given boundary conditions, for example, a given deformation condition and a given stress rate condition (step S170).
    Type: Application
    Filed: August 1, 2006
    Publication date: June 25, 2009
    Applicant: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY
    Inventors: Akira Asaoka, Toshihiro Noda, Masaki Nakano
  • Publication number: 20090116361
    Abstract: Optical information recording and reproducing medium 10 has two recording layers of first and second recording layers 12 and 14, from a laser beam incident surface side. In each control area 21, recording layer management information containing at least information indicating recording states of a plurality of areas into which the inside of data recording area 22 of each recording layer is divided is recorded. When recording or reproducing is performed on the second recording layer 14, the recording layer management information is checked, and a laser beam output is changed based on a recording state of an area corresponding to the first recording layer 12.
    Type: Application
    Filed: December 31, 2008
    Publication date: May 7, 2009
    Inventors: Mitsuya Okada, Toshiaki Iwanaga, Takaheru Shibatoko, Hideki Tanabe, Masashi Kubota, Masaki Nakano, Satoshi Sugaya
  • Publication number: 20090102982
    Abstract: A television includes a transmitting and receiving unit that transmits and receives video data to/from an external apparatus connected to the television, a connection terminal, which is connected to the transmitting and receiving unit, and located on a side of the television, and a control unit configured to inhibit the transmitting and receiving unit from outputting video data from the connection terminal unless an instruction removing the inhibit is received.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 23, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Masaki Nakano
  • Publication number: 20090059747
    Abstract: [PROBLEMS] To reduce the number of recording condition adjustment steps before information recording, simplify the recording condition adjustment procedure, and perform stable and accurate recoding condition adjustment of an information recording medium. [MEANS FOR SOLVING PROBLEMS] When recording information on a recording medium, the recording condition is optimized. Next, under the optimized recording condition, a signal is recorded in a prescribed area of the information recording medium. Next, by using the signal recorded under the optimized recording condition, a part of the recording condition for the next and later is adjusted. Thus, a part of the recording condition is adjusted by using the signal recorded under the optimized recording condition and accordingly, it is possible to rapidly perform the recording condition adjustment before information recording.
    Type: Application
    Filed: March 14, 2006
    Publication date: March 5, 2009
    Applicant: NEC Corporation
    Inventors: Masaki Nakano, Masatsugu Ogawa, Shigeru Shimonou
  • Patent number: 7489620
    Abstract: Optical information recording and reproducing medium 10 has two recording layers of first and second recording layers 12 and 14, from a laser beam incident surface side. In each control area 21, recording layer management information containing at least information indicating recording states of a plurality of areas into which the inside of data recording area 22 of each recording layer is divided is recorded. When recording or reproducing is performed on the second recording layer 14, the recording layer management information is checked, and a laser beam output is changed based on a recording state of an area corresponding to the first recording layer 12.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: February 10, 2009
    Assignee: NEC Corporation
    Inventors: Mitsuya Okada, Toshiaki Iwanaga, Takeharu Shibatoko, Hideki Tanabe, Masashi Kubota, Masaki Nakano, Satoshi Sugaya
  • Patent number: 7471601
    Abstract: In an optical disk system using a PRML identification system, a method for deriving an optimum recording wave in a short period of time is provided. Parameters of the recording wave are adjusted by using an evaluation value obtained by a signal evaluation method which is suitable for the PRML identification system as an index. In this case, as a parameter adjusting method, a plurality of adjusting methods are utilized.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: December 30, 2008
    Assignees: Kabushiki Kaisha Toshiba, NEC Corporation
    Inventors: Yutaka Kashihara, Akihito Ogawa, Naoki Morishita, Masaki Nakano, Masatsugu Ogawa, Shuichi Ookubo, Toshiaki Iwanaga
  • Patent number: 7468169
    Abstract: This invention provides a production process, which can stably produce high-quality satin white (calcium trisulfoaluminate) having very small and homogeneous particulate shapes suitable for incorporation into coated paper for printing, and an apparatus for use in said process. In this process for producing calcium trisulfoaluminate, a calcium hydroxide suspension (A) is reacted with an aqueous aluminum sulfate solution (B) to produce calcium trisulfoaluminate (C). The aqueous aluminum sulfate solution (B) is added in plurality of stages to the calcium hydroxide suspension (A). At least any one stage of the plurality of stages addition, addition of the aqueous aluminum sulfate solution (B) to the calcium hydroxide suspension (A) is carried out in such a manner that the aqueous aluminum sulfate solution (B) is continuously added to the calcium hydroxide suspension (A) being continuously transferred.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: December 23, 2008
    Assignee: OJI Paper Co., Ltd.
    Inventors: Takayuki Kishida, Yuichi Ogawa, Yoshiki Kojima, Takuya Ono, Kenichi Mitsui, Tetsuya Hirabayashi, Masaki Nakano
  • Publication number: 20080301673
    Abstract: An in-vehicle terminal (101) is provided, which has a function ensuring that computer resource secured by a virtual machine (1a1) or a virtual machine (1b1) is controlled within a limit value of the computer resource that is allocated to the corresponding virtual machine, or a function which is capable of executing multiple virtual machines appropriately. When the virtual machine (1a1) or the virtual machine (1b1) requests securing the computer resource, the in-vehicle terminal (101) requests the OS (143) to secure computer resource in response to the request, if the requested resource is lower than the limit value of the computer resource that is allocated to the corresponding virtual machine.
    Type: Application
    Filed: June 28, 2006
    Publication date: December 4, 2008
    Inventors: Shinichiro Kawasaki, Kiyoshi Ikehara, Masaki Nakano
  • Publication number: 20080267816
    Abstract: Solid tin (Sn) is used as a target, a CO2 laser is used as an excitation source for the target, and after the size of debris emitted from plasma is decreased to a nanometer or smaller size by exciting the solid tin by a laser beam outputted from the CO2 laser, the emitted debris of a nanometer or smaller size is acted upon so as not to reach the optical element. In accordance with the present invention, in the EUV light source apparatus, the debris emitted together with EUV light from plasma generated by exciting a target within a chamber by a laser beam is prevented from adhering to an optical element provided within the chamber and forming a metal film. As a result, the service life of the optical element can be extended.
    Type: Application
    Filed: April 24, 2008
    Publication date: October 30, 2008
    Applicant: KOMATSU LTD.
    Inventors: Yoshifumi Ueno, Masato Moriya, Masaki Nakano, Hiroshi Komori