Patents by Inventor Yoshiaki Saito

Yoshiaki Saito 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: 20120074984
    Abstract: A look-up table circuit according to an embodiment includes: a variable resistance circuit including variable resistance devices and selecting a variable resistance device from the variable resistance devices based on an input signal; a reference circuit having a resistance value between the largest resistance value and the smallest resistance value of the variable resistance circuit; a first n-channel MOSFET including a source connected to a terminal of the variable resistance circuit and a gate connected to a drain; a second n-channel MOSFET including a source connected to a terminal of the reference circuit and a gate connected to the gate of the first n-channel MOSFET; a first current supply circuit to supply a current to the variable resistance circuit; a second current supply circuit to supply a current to the reference circuit; and a comparator comparing voltages at a first input terminal and a second input terminal.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 29, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideyuki SUGIYAMA, Tetsufumi Tanamoto, Takao Marukame, Mizue Ishikawa, Tomoaki Inokuchi, Yoshiaki Saito
  • Patent number: 8139403
    Abstract: Certain embodiments provide a spin memory including a memory cell including a ferromagnetic stacked film that has a stacked structure in which a first ferromagnetic layer, a first nonmagnetic layer, a second ferromagnetic layer, a second nonmagnetic layer, and a third ferromagnetic layer are stacked in this order or reverse order, the third ferromagnetic layer and the second ferromagnetic layer being antiferromagnetically exchange-coupled via the second nonmagnetic layer. The ferromagnetic stacked film includes a current path in which a first and second write currents flow from the first ferromagnetic layer to the third ferromagnetic layer to write a first and second magnetization states into the first ferromagnetic layer respectively, and the second write current is higher than the first write current.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: March 20, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoaki Inokuchi, Takao Marukame, Mizue Ishikawa, Hideyuki Sugiyama, Hisanori Aikawa, Masahiko Nakayama, Tatsuya Kishi, Hiroaki Yoda, Yoshiaki Saito
  • Patent number: 8134193
    Abstract: It is possible to reduce a current required for spin injection writing. A magneto-resistance effect element includes: a first magnetization pinned layer; a magnetization free layer; a tunnel barrier layer; a second magnetization pinned layer whose direction of magnetization is pinned to be substantially anti-parallel to the direction of magnetization of the first magnetization pinned layer, and; a non-magnetic layer.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: March 13, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoaki Inokuchi, Yoshiaki Saito, Hideyuki Sugiyama
  • Patent number: 8111087
    Abstract: A semiconductor integrated circuit includes an n-channel spin FET including one of a magnetic tunnel junction and a magneto-semiconductor junction, the n-channel spin FET including a gate terminal to receive an input signal, a source terminal to receive a first power supply potential, and a drain terminal connected to an output terminal, a p-channel FET including a gate terminal to receive a clock signal, a source terminal to receive a second power supply potential, and a drain terminal connected to the output terminal, a subsequent circuit connected to the output terminal, and a control circuit which turns on the p-channel FET to start charging the output terminal, then turns off the p-channel FET to end the charging, and supplies the input signal to the gate terminal of the n-channel spin FET.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: February 7, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoaki Inokuchi, Mizue Ishikawa, Hideyuki Sugiyama, Yoshiaki Saito
  • Publication number: 20120024146
    Abstract: The present invention provides a control method and a control apparatus for a vehicle that make it possible to moderate or completely eliminate the impacts generated when the bucket is operated in a tilt direction, from a state in which the bucket in a dump position is forcibly actuated in the tilt direction and the bucket hydraulic cylinder is pressurized by the lifting operation of the boom and also to perform the boom lifting operation with good operability and workability.
    Type: Application
    Filed: March 25, 2010
    Publication date: February 2, 2012
    Inventor: Yoshiaki Saito
  • Publication number: 20120019283
    Abstract: A spin MOSFET includes: a first ferromagnetic layer provided on a semiconductor substrate, and having a fixed magnetization direction perpendicular to a film plane; a semiconductor layer provided on the first ferromagnetic layer, including a lower face opposed to the upper face of the first ferromagnetic layer, an upper face opposed to the lower face, and side faces different from the lower and upper faces; a second ferromagnetic layer provided on the upper face of the semiconductor layer, and having a variable magnetization direction perpendicular to a film plane; a first tunnel barrier provided on the second ferromagnetic layer; a third ferromagnetic layer provided on the first tunnel barrier; a gate insulating film provided on the side faces of the semiconductor layer; and a gate electrode provided on the side faces of the semiconductor layer with the gate insulating film being interposed therebetween.
    Type: Application
    Filed: September 9, 2011
    Publication date: January 26, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshiaki SAITO, Hideyuki Sugiyama, Tomoaki Inokuchi, Takao Marukame, Mizue Ishikawa
  • Publication number: 20120003070
    Abstract: The construction vehicle is provided with an engine, a clutch, a travel device, a work equipment, a drive force setting dial, and a controller that includes: a theoretical value determination unit that determines a theoretical value, for the degree of engagement to make the upper limit value of the drive force equal to a set drive force; an operational state determination unit that determines whether the work equipment is outputting the drive force in a predetermined travel direction; a drive force determination unit that determines whether the drive force is greater than the set drive force; and a degree of engagement reduction unit that, if of operational state determination and of drive force determination are both affirmative, causes the degree of engagement to approach the theoretical value.
    Type: Application
    Filed: March 15, 2010
    Publication date: January 5, 2012
    Applicant: KOMATSU LTD.
    Inventors: Mamoru Tochizawa, Koji Takahashi, Yoshiaki Saito
  • Publication number: 20110318156
    Abstract: The construction machine includes a propulsion device the working equipment, and a controller that controls the propulsion device. The controller performs attitude determination of determining whether or not the present attitude of the working equipment corresponds to a predetermined attitude, performs propulsion determination of determining whether or not the present propulsive operation of the propulsion device corresponds to a predetermined propulsive operation performed while performing a predetermined construction task that applies an over load to the working equipment, performs driving force determination of determining whether or not the magnitude of the present propelling force corresponds to a predetermined magnitude at which an over load is applied to the working equipment, and reduces the propelling force outputted from the propulsion device when the results of attitude determination, propulsion determination, and driving force determination are affirmative.
    Type: Application
    Filed: March 11, 2010
    Publication date: December 29, 2011
    Applicant: KOMATSU LTD.
    Inventors: Yoshiaki Saito, Masatsugu Numazaki
  • Publication number: 20110316104
    Abstract: It is possible to reduce a current required for spin injection writing. A magneto-resistance effect element includes: a first magnetization pinned layer; a magnetization free layer; a tunnel barrier layer; a second magnetization pinned layer whose direction of magnetization is pinned to be substantially anti-parallel to the direction of magnetization of the first magnetization pinned layer, and; a non-magnetic layer.
    Type: Application
    Filed: June 28, 2011
    Publication date: December 29, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoaki INOKUCHI, Yoshiaki Saito, Hideyuki Sugiyama
  • Publication number: 20110248325
    Abstract: A spin transistor includes a non-magnetic semiconductor substrate having a channel region, a first area, and a second area. The channel region is between the first and the second areas. The spin transistor also includes a first conductive layer located above the first area and made of a ferromagnetic material magnetized in a first direction; and a second conductive layer located above the second area and made of a ferromagnetic material magnetized in one of the first direction and a second direction that is antiparallel with respect to the first direction. The channel region introduces electron spin between the conductive layers. The spin transistor also includes a gate electrode located between the conductive layers and above the channel region; and a tunnel barrier film located between the non-magnetic semiconductor substrate and at least one of the conductive layers.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshiaki SAITO, Hideyuki Sugiyama
  • Patent number: 8026561
    Abstract: A spin MOSFET includes: a first ferromagnetic layer provided on an upper face of a semiconductor substrate, and having a fixed magnetization direction perpendicular to a film plane; a semiconductor layer provided on an upper face of the first ferromagnetic layer, including a lower face opposed to the upper face of the first ferromagnetic layer, an upper face opposed to the lower face, and side faces different from the lower face and the upper face; a second ferromagnetic layer provided on the upper face of the semiconductor layer, and having a variable magnetization direction perpendicular to a film plane; a first tunnel barrier provided on an upper face of the second ferromagnetic layer; a third ferromagnetic layer provided on an upper face of the first tunnel barrier; a gate insulating film provided on the side faces of the semiconductor layer; and a gate electrode provided on the side faces of the semiconductor layer with the gate insulating film being interposed therebetween.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: September 27, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiaki Saito, Hideyuki Sugiyama, Tomoaki Inokuchi, Takao Marukame, Mizue Ishikawa
  • Publication number: 20110228596
    Abstract: Certain embodiments provide a spin memory including a memory cell including a ferromagnetic stacked film that has a stacked structure in which a first ferromagnetic layer, a first nonmagnetic layer, a second ferromagnetic layer, a second nonmagnetic layer, and a third ferromagnetic layer are stacked in this order or reverse order, the third ferromagnetic layer and the second ferromagnetic layer being antiferromagnetically exchange-coupled via the second nonmagnetic layer. The ferromagnetic stacked film includes a current path in which a first and second write currents flow from the first ferromagnetic layer to the third ferromagnetic layer to write a first and second magnetization states into the first ferromagnetic layer respectively, and the second write current is higher than the first write current.
    Type: Application
    Filed: September 20, 2010
    Publication date: September 22, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tomoaki Inokuchi, Takao Marukame, Mizue Ishikawa, Hideyuki Sugiyama, Hisanori Aikawa, Masahiko Nakayama, Tatsuya Kishi, Hiroaki Yoda, Yoshiaki Saito
  • Publication number: 20110209916
    Abstract: Provided are a sheathed wire that can be processed without being covered with a protective material, a sheathed wire with a terminal, and a method of producing a sheathed wire with a terminal. In a sheathed wire (10) including: a core (16) made of a conductor (12) covered with an insulator (14); and a sheath (18) covering the circumferential surface of the core (16), at least a part of the sheath (18) is provided slidably with respect to the core (16) in the axial direction of the core (16), and the slidable part of the sheath (18) has a slit (20) from the outer surface thereof to the inner surface thereof in a manner that the slit (20) extends in the axial direction.
    Type: Application
    Filed: August 7, 2009
    Publication date: September 1, 2011
    Applicants: FUJIKURA LTD., YONEZAWA ELECTRIC WIRE CO., LTD.
    Inventors: Shuji Iwamoto, Fumio Yajima, Yumiko Tanaka, Yoshiaki Saito, Yoshiaki Ishikawa, Katsuyuki Numazawa
  • Patent number: 8004029
    Abstract: A spin transistor includes a non-magnetic semiconductor substrate having a channel region, a first area, and a second area. The channel region is between the first and the second areas. The spin transistor also includes a first conductive layer located above the first area and made of a ferromagnetic material magnetized in a first direction; and a second conductive layer located above the second area and made of a ferromagnetic material magnetized in one of the first direction and a second direction that is antiparallel with respect to the first direction. The channel region introduces electron spin between the conductive layers. The spin transistor also includes a gate electrode located between the conductive layers and above the channel region; and a tunnel barrier film located between the non-magnetic semiconductor substrate and at least one of the conductive layers.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: August 23, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshiaki Saito, Hideyuki Sugiyama
  • Publication number: 20110194342
    Abstract: Certain embodiments provide a nonvolatile memory circuit in which a first p-channel MOS transistor and a first n-channel spin MOS transistor are connected in series, a second p-channel MOS transistor and a second n-channel spin MOS transistor are connected in series, gates of the first p-channel MOS transistor and the first n-channel spin MOS transistor are connected, gates of the second p-channel MOS transistor and the second n-channel spin MOS transistor are connected, a first n-channel transistor includes a drain connected to a drain of the first p-channel transistor and the gate of the second p-channel transistor, a second n-channel transistor includes a drain connected to a drain of the second p-channel transistor and the gate of the first p-channel transistor, and gates of the first and second n-channel transistors are connected.
    Type: Application
    Filed: September 24, 2010
    Publication date: August 11, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hideyuki SUGIYAMA, Tetsufumi TANAMOTO, Takao MARUKAME, Mizue ISHIKAWA, Tomoaki INOKUCHI, Yoshiaki SAITO
  • Patent number: 7977719
    Abstract: It is possible to reduce a current required for spin injection writing. A magneto-resistance effect element includes: a first magnetization pinned layer; a magnetization free layer; a tunnel barrier layer; a second magnetization pinned layer whose direction of magnetization is pinned to be substantially anti-parallel to the direction of magnetization of the first magnetization pinned layer, and; a non-magnetic layer.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: July 12, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoaki Inokuchi, Yoshiaki Saito, Hideyuki Sugiyama
  • Patent number: 7973351
    Abstract: A stack includes a crystalline MgO layer, crystalline Heusler alloy layer, and amorphous Heusler alloy layer. The crystalline Heusler alloy layer is provided on the MgO layer. The amorphous Heusler alloy layer is provided on the crystalline Heusler alloy layer.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: July 5, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takao Marukame, Mizue Ishikawa, Tomoaki Inokuchi, Hideyuki Sugiyama, Yoshiaki Saito
  • Patent number: 7956395
    Abstract: A spin transistor includes a first ferromagnetic layer provided on a substrate and having an invariable magnetization direction, a second ferromagnetic layer provided on the substrate apart from the first ferromagnetic layer in a first direction, and having a variable magnetization direction, a plurality of projecting semiconductor layers provided on the substrate to extend in the first direction, and sandwiched between the first ferromagnetic layer and the second ferromagnetic layer, a plurality of channel regions respectively provided in the projecting semiconductor layers, and a gate electrode provided on the channel regions.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: June 7, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoaki Inokuchi, Mizue Ishikawa, Hideyuki Sugiyama, Yoshiaki Saito
  • Patent number: 7943974
    Abstract: A spin MOS field effect transistor includes a source electrode and a drain electrode each having a structure obtained by stacking an impurity diffusion layer, a (001)-oriented MgO layer and a Heusler alloy. The impurity diffusion layer is formed in a surface region of a semiconductor layer. The (001)-oriented MgO layer is formed on the impurity diffusion layer. The Heusler alloy is formed on the MgO layer.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: May 17, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Mizue Ishikawa, Yoshiaki Saito, Hideyuki Sugiyama, Tomoaki Inokuchi
  • Publication number: 20110108898
    Abstract: A spin memory includes a magneto-resistance element having a first ferromagnetic layer in which a magnetization direction is pinned, a second ferromagnetic layer in which a magnetization direction changes, and a first nonmagnetic layer between the first and second ferromagnetic layers, a lower electrode and an upper electrode extending in a direction between 45 degrees and 90 degrees relative to an axis of hard magnetization of the second ferromagnetic layer, and sandwiching the magneto-resistance element at one end in a longitudinal direction, a switching element connected to another end in a longitudinal direction of the lower electrode, and a bit line connected to another end in a longitudinal direction of the upper electrode, wherein writing is carried out by supplying spin-polarized electrons to the second ferromagnetic layer and applying a magnetic field from the lower electrode and the upper electrode to the second ferromagnetic layer.
    Type: Application
    Filed: August 5, 2010
    Publication date: May 12, 2011
    Inventors: Tomoaki Inokuchi, Yoshiaki Saito, Hideyuki Sugiyama