Patents by Inventor Yoshihisa Kato

Yoshihisa Kato 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).

  • Optical fiber, end face structure of optical fiber assembly, and optical connector
    Patent number: 7555184
    Abstract: An optical fiber includes a core, a clad formed around the core, a plurality of holes being formed in the clad, and a UV curing optically-transparent resin which is filled in the holes and hardened. The UV curing optically-transparent resin has a Young's modulus of 8 to 500 MPa after hardening.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: June 30, 2009
    Assignee: Hitachi Cable, Ltd.
    Inventors: Yoshinori Kurosawa, Kazumasa Ohsono, Yoshihisa Kato
  • FERROELECTRIC STACKED-LAYER STRUCTURE, FIELD EFFECT TRANSISTOR, AND FERROELECTRIC CAPACITOR AND FABRICATION METHODS THEREOF
    Publication number: 20090152607
    Abstract: A ferroelectric stacked-layer structure is fabricated by forming a first polycrystalline ferroelectric film on a polycrystalline or amorphous substrate, and after planarizing a surface of the first ferroelectric film, laminating on the first ferroelectric film a second thin ferroelectric film having the same crystalline structure as the first ferroelectric film. A field effect transistor or a ferroelectric capacitor includes the ferroelectric stacked-layer structure as a gate insulating film or a capacitor film.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 18, 2009
    Inventors: Hiroyuki TANAKA, Yoshihisa Kato, Yukihiro Kaneko
  • Memory system
    Patent number: 7516344
    Abstract: A memory system of the present invention includes a memory device having a nonvolatile memory and an access device which accesses the memory device. The memory device has a detection unit to detect a temperature of the memory device, a determination unit to determine an operating condition in accordance with the detected temperature and a notification unit to notify the access device of the determined operating condition. The access device has an interface unit to connect to the memory device and a controlling unit to control the interface unit in accordance with the notified operating condition from the memory device.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: April 7, 2009
    Assignee: Panasonic Corporation
    Inventors: Yoshihisa Kato, Yasushi Gohou, Masahiro Nakanishi, Masayuki Toyama, Shunichi Iwanari
  • SOLID-STATE IMAGING DEVICE, RECEIVED-LIGHT INTENSITY MEASURING DEVICE, AND RECEIVED-LIGHT INTENSITY MEASURING METHOD
    Publication number: 20090079857
    Abstract: The received-light intensity measuring device includes: a pixel circuit 1 including a photodiode (PD) that accumulates an amount of electric charges according to the intensity of received light, a floating diffusion (FD) that generates a signal voltage VCL according to an amount of retained electric charges, and a transfer switch that controls the transfer, to the FD, of the electric charges accumulated in the PD; a DAC 11 that generates a control voltage VTRAN varying in a ramp waveform and applies VTRAN to the gate of the transfer switch; a column AD conversion circuit 13 that obtains the digital value by quantizing a length of time from a first point in time set with reference to a period during which VTRAN is applied to a second point in time at which a specific fluctuation occurs in a temporal variation rate of the signal voltage VCL while VTRAN is being applied.
    Type: Application
    Filed: September 23, 2008
    Publication date: March 26, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Yoshihisa KATO, Takahiko MURATA, Shigetaka KASUGA, Takayoshi YAMADA
  • Semiconductor storage apparatus
    Patent number: 7506099
    Abstract: A semiconductor storage apparatus comprising: a ferroelectric memory; an SRAM 30; a counter 41; a CAM 10 that judges whether or not a block of data requested to be read out from the ferroelectric memory is stored in the SRAM 30; a storage control unit 51 that, if a result of the judgment is negative, performs a control to read out the requested block of data from the ferroelectric memory and stores a copy of the read-out block of data into a unit storage area in the SRAM 30 that corresponds to the count value indicated by the counter 41; and a counter control unit 52 that causes the counter 41 to update the count value each time a result of the judgment is negative.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: March 17, 2009
    Assignee: Panasonic Corporation
    Inventors: Shunichi Iwanari, Yasushi Gohou, Yoshihisa Kato
  • SOLID-STATE IMAGING DEVICE
    Publication number: 20090059047
    Abstract: Provided is a solid-state imaging device having pixel units that are two-dimensionally arranged, and including: a photodiode that generates an optical signal charge corresponding to an intensity and an exposure time of light; a MOS transistor that transfers the optical signal charge; an accumulating unit that generates a voltage corresponding to the signal charge through the MOS transistor; a storing unit that stores a voltage corresponding to an optical signal charge in the accumulating unit; and a voltage setting unit that sets a value of a voltage in the accumulating unit to a value corresponding to the voltage in the storing unit.
    Type: Application
    Filed: August 21, 2008
    Publication date: March 5, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Takahiko MURATA, Yoshihisa KATO, Shigetaka KASUGA, Takayoshi YAMADA
  • MEMORY CONTROLLER, NONVOLATILE STORAGE DEVICE, NONVOLATILE STORAGE SYSTEM, AND DATA WRITING METHOD
    Publication number: 20090055576
    Abstract: A nonvolatile storage device is provided with a nonvolatile main storage memory (114) whose erase size is larger than a cluster size, and a buffer (106), i.e. a nonvolatile auxiliary storage memory. At the time of writing data in the memory, the data is temporarily stored in the buffer (106), then, a plurality of data in the buffer (106) are collectively taken out to be stored in the main storage memory (114). Data in an original block is saved in a write block in the main storage memory. Thus, the data can be written in the main storage memory (114) at a high speed.
    Type: Application
    Filed: March 9, 2006
    Publication date: February 26, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Masahiro Nakanishi, Tomoaki Izumi, Tetsushi Kasahara, Kazuaki Tamura, Kiminori Matsuno, Yutaka Nakamura, Masayuki Toyama, Yasushi Goho, Syunichi Iwanari, Yoshihisa Kato, Manabu Inoue
  • Optical fiber, end face structure of optical fiber assembly, and optical connector
    Publication number: 20080317416
    Abstract: An optical fiber includes a core, a clad formed around the core, a plurality of holes being formed in the clad, and a UV curing optically-transparent resin which is filled in the holes and hardened. The UV curing optically-transparent resin has a Young's modulus of 8 to 500 MPa after hardening.
    Type: Application
    Filed: November 16, 2007
    Publication date: December 25, 2008
    Inventors: Yoshinori Kurosawa, Kazumasa Ohsono, Yoshihisa Kato
  • Optical connector
    Publication number: 20080304794
    Abstract: An optical connector has a ferrule, an optical fiber connector disposed at an back end of the ferrule, an internal optical fiber inserted into the ferrule and the optical fiber connector, the internal optical fiber being adapted to butt-connect at a back end face thereof to an external optical fiber to be inserted into the optical fiber connector, and a refractive index matching body attached to the back end face of the internal optical fiber. The refractive index matching body has a cross-linked and hardened cross-linkable refractive index matching agent including a stress-strain relaxation agent.
    Type: Application
    Filed: December 18, 2007
    Publication date: December 11, 2008
    Inventors: Yoshihisa Kato, Kanako Suzuki
  • Optical fiber, optical fiber connection structure and optical connector
    Publication number: 20080292248
    Abstract: An optical fiber includes a core, a clad having a plurality of air holes at a periphery of the core, and a hardening resin filled in a sealed portion at an end of the plurality of air holes. The hardening resin after hardening has a fill length of 7 mm to 8 mm. An optical fiber connection structure includes the optical fiber with an end face butt-connected to another optical fiber. An optical connector includes the optical fiber, and a ferrule to which the optical fiber is attached.
    Type: Application
    Filed: February 1, 2008
    Publication date: November 27, 2008
    Applicant: HITACHI CABLE, LTD.
    Inventors: Kanako Suzuki, Bing Yao, Kazumasa Ohsono, Yoshihisa Kato
  • Optical fiber, sealing method for optical fiber end face, connection structure of optical fiber, and optical connector
    Publication number: 20080292244
    Abstract: An optical fiber includes a core, a clad formed around the core, a plurality of holes being formed in the clad, and a hardening resin having a moisture permeability equal to or less than 0.5 g/cm2ยท24 hr, in which the hardening resin is filled in a vicinity of an end face of the holes.
    Type: Application
    Filed: November 15, 2007
    Publication date: November 27, 2008
    Applicant: HITACHI CABLE, LTD.
    Inventors: Yoshihisa Kato, Kanako Suzuki, Yoshinori Kurosawa, Kazumasa Ohsono
  • FAN APPARATUS
    Publication number: 20080260517
    Abstract: A fan apparatus includes a casing and a fan unit. The casing is a hollow member having an inlet and an outlet. The fan unit has an inlet and an outlet, and includes a plurality of axial fans. The fan unit is disposed on the inside of the casing, and the inlet of the fan unit is disposed in the vicinity of the inlet of the casing. The position of the fan unit within the casing can be varied in order to alter the air flow and static pressure of the air discharged by the fan apparatus.
    Type: Application
    Filed: April 16, 2008
    Publication date: October 23, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Tomo HAYASHIGAITO, Kenji IWAMOTO, Yoshihisa KATO, Hironobu NISHIDA, Suguru YAMADA, Manabu MIYAKODA
  • SEMICONDUCTOR MEMORY DEVICE AND METHOD FOR FABRICATING THE SAME
    Publication number: 20080251816
    Abstract: A semiconductor memory device is composed of a field effect transistor using the interface between a ferroelectric film and a semiconductor film as the channel and including a gate electrode to which a voltage for controlling the polarization state of the ferroelectric film is applied and source/drain electrodes provided on both ends of the channel to detect a current flowing in the channel in accordance with the polarization state. The semiconductor film is made of a material having a spontaneous polarization and the direction of the spontaneous polarization is parallel with the interface between the ferroelectric film and the semiconductor film.
    Type: Application
    Filed: February 19, 2008
    Publication date: October 16, 2008
    Inventors: Hiroyuki Tanaka, Yukihiro Kaneko, Yoshihisa Kato
  • AXIAL FLOW FAN
    Publication number: 20080175729
    Abstract: An axial flow fan includes a housing, a plurality of rotor vanes that rotate inside the housing, and a plurality of sheet-like stationary vanes that are disposed below the rotor vanes and fixed to the housing. The axial flow fan includes a motor that is connected to the rotor vanes and rotates the rotor vanes about a central axis. Each stationary vane has a projecting portion projecting axially upward from a sidewall of a base portion. The projecting portion of each stationary vane has an inner side surface on the central axis side. When a stator part is attached to the housing, the outer side surface of a circuit board radially meets the inner side surfaces. The circuit board axially meets the axially upper end surface of the sidewall of the base portion.
    Type: Application
    Filed: January 15, 2008
    Publication date: July 24, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Yoshihisa KATO, Suguru YAMADA
  • Optical Connector
    Publication number: 20080159696
    Abstract: An optical connector according to the present invention comprises a ferrule and a V-groove board connected to the ferrule, wherein a first optical fiber and a second optical fiber being butt jointed in a V-groove formed in the V-groove board so as to be interconnected; the second optical fiber is connected to the first optical fiber through a refractive index matching material of cross-link curing type applied to an end surface on the V-groove board side of the first optical fiber; and spaces are provided in the V-groove so as to relax stress loaded on the refractive index matching material of cross-link curing type.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 3, 2008
    Inventors: Kanako Suzuki, Yoshihisa Kato, Noribumi Shiina, Kazumasa Ohsono, Tomoyuki Nisio
  • Optical connector and connection structure of optical fibers
    Patent number: 7393143
    Abstract: An optical connector having: a ferrule into which a first optical fiber is inserted; an optical fiber connector disposed at an back end of the ferrule; and a cross-linkable refractive index matching member attached onto an end face on a back end side of the first optical fiber. The end face on the back end side of the first optical fiber and an end face of a second optical fiber to be inserted into the optical fiber connector from a back end side thereof are to be connected by a butting connection. The cross-linkable refractive index matching member is formed such that a cross-linkable refractive index matching agent is coated on the end face on the back end side of the first optical fiber, and the coated agent is cross-linked and hardened.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: July 1, 2008
    Assignee: Hitachi Cable, Ltd.
    Inventors: Yoshihisa Kato, Kanako Suzuki, Noribumi Shiina, Tomoyuki Nisio, Kazumasa Ohsono, Yoshikazu Namekawa, Yoshihiro Nakatani
  • FORMING METHOD OF REFRACTIVE INDEX MATCHING FILM
    Publication number: 20080131061
    Abstract: A forming method of a refractive index matching film comprises steps: one end of an optical fiber is brought into contact with a liquid surface of a photo-curable refractive index matching solution; curing reaction light is made incident to the opposite end of the optical fiber and is emitted through the one end of the optical fiber so as to cure preliminarily the photo-curable refractive index matching solution in contact with the one end of the optical fiber; the curing reaction light is tentatively stopped; the one end of the optical fiber is separated from the liquid surface of the photo-curable refractive index matching solution; and the curing reaction light is made incident again from the opposite end of the optical fiber so as to cure the preliminarily cured photo-curable refractive index matching solution and form a refractive index matching film.
    Type: Application
    Filed: January 29, 2008
    Publication date: June 5, 2008
    Inventors: Yoshihisa KATO, Kanako Suzuki
  • BRUSHLESS MOTOR AND FAN UNIT
    Publication number: 20080079325
    Abstract: [Object] A method to hook a magnet wire extracted from a coil [Means to Solve Problems] A stator core 35 includes a core back 352 of a substantially annular shape. At a radially outer end portion of the core back 352 four teeth 351 are arranged radially. At the teeth 351, a coil 371 is formed by winding a magnet wire 37 via an insulator 36. A first insulator 361 configuring a lower half of the insulator 36 includes a first core back insulating portion 3611, 1 first teeth insulating portion 3612, and a first cylindrical portion 3613. A hook portion 4 is formed at the first core back insulating portion 3611 at radially outer side, and between the teeth 351. The magnet wire 37 extracted from the coil 371 is hooked on the hook portion 4. The magnet wire 37 hooked on the hook portion 4 is lead the magnet wire 37 around the hook portion 4 as a base, and is soldered to a land 381 formed above a circuit board 38.
    Type: Application
    Filed: December 7, 2007
    Publication date: April 3, 2008
    Applicant: NIDEC CORPORATION
    Inventors: Suguru Yamada, Takashi Nagamitsu, Yoshihisa Kato
  • FAN AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20070207044
    Abstract: A fan includes a shaft, a hollow, approximately cylindrical rotor yoke that rotates around the shaft as a rotation axis and is open toward one of its axial ends, a rotor magnet secured to an inner circumference of the rotor yoke, and an impeller secured to an outer circumference of the rotor yoke and arranged to rotate together with the rotor yoke to generate an air flow. One of the impeller and the rotor yoke is provided with an index used for circumferentially positioning the impeller or the rotor yoke.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 6, 2007
    Applicant: NIDEC CORPORATION
    Inventors: Takashi NAGAMITSU, Yoshihisa KATO, Hiromasa SUMIDA, Masayuki MATSUSHITA, Kouji MURAOKA, Yusuke YOSHIDA
  • Optical connector and connection structure of optical fibers
    Publication number: 20070196055
    Abstract: An optical connector having: a ferrule into which a first optical fiber is inserted; an optical fiber connector disposed at an back end of the ferrule; and a cross-linkable refractive index matching member attached onto an end face on a back end side of the first optical fiber. The end face on the back end side of the first optical fiber and an end face of a second optical fiber to be inserted into the optical fiber connector from a back end side thereof are to be connected by a butting connection. The cross-linkable refractive index matching member is formed such that a cross-linkable refractive index matching agent is coated on the end face on the back end side of the first optical fiber, and the coated agent is cross-linked and hardened.
    Type: Application
    Filed: December 13, 2006
    Publication date: August 23, 2007
    Inventors: Yoshihisa Kato, Kanako Suzuki, Noribumi Shiina, Tomoyuki Nisio, Kazumasa Ohsono, Yoshikazu Namekawa, Yoshihiro Nakatani