Patents by Inventor Haruyuki Yamazaki

Haruyuki Yamazaki 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: 10707238
    Abstract: To improve field-effect mobility and reliability in a transistor including an oxide semiconductor film. A semiconductor device includes a transistor including an oxide semiconductor film. The transistor includes a region where the maximum value of field-effect mobility of the transistor at a gate voltage of higher than 0 V and lower than or equal to 10 V is larger than or equal to 40 and smaller than 150; a region where the threshold voltage is higher than or equal to minus 1 V and lower than or equal to 1 V; and a region where the S value is smaller than 0.3 V/decade.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: July 7, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Junichi Koezuka, Kenichi Okazaki, Yukinori Shima, Shinpei Matsuda, Haruyuki Baba, Ryunosuke Honda
  • Patent number: 10522688
    Abstract: A semiconductor device capable of holding data for a long time is provided. The semiconductor device includes a first transistor, a second transistor, and a circuit. The first transistor includes a first gate and a second gate. The first transistor includes a first semiconductor in a channel formation region. The first gate and the second gate overlap with each other in a region with the first semiconductor provided therebetween. The second transistor includes a second semiconductor in a channel formation region. A first terminal of the second transistor is electrically connected to a gate of the second transistor and the second gate. A second terminal of the second transistor is electrically connected to the circuit. The circuit has a function of generating a negative potential. The second semiconductor has a wider bandgap than the first semiconductor.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: December 31, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kiyoshi Kato, Tomoaki Atsumi, Shunpei Yamazaki, Haruyuki Baba, Shinpei Matsuda
  • Publication number: 20190280019
    Abstract: To improve field-effect mobility and reliability in a transistor including an oxide semiconductor film. A semiconductor device includes a transistor including an oxide semiconductor film. The transistor includes a region where the maximum value of field-effect mobility of the transistor at a gate voltage of higher than 0 V and lower than or equal to 10 V is larger than or equal to 40 and smaller than 150; a region where the threshold voltage is higher than or equal to minus 1 V and lower than or equal to 1 V; and a region where the S value is smaller than 0.3 V/decade.
    Type: Application
    Filed: March 18, 2019
    Publication date: September 12, 2019
    Inventors: Shunpei YAMAZAKI, Junichi KOEZUKA, Kenichi OKAZAKI, Yukinori SHIMA, Shinpei MATSUDA, Haruyuki BABA, Ryunosuke HONDA
  • Patent number: 8864443
    Abstract: A sealing structure in which free-cutting spacers on a sealing base plate and sealing fins on a rotor are opposed to each other is provided. The sealing base plate is disposed so as to be movable in an axial direction of the rotor. When a steam turbine increases in load, a pressure head moves in an axial steam-pressure loading direction of the rotor and the sealing base plate connected to the pressure head moves in the axial steam-pressure loading direction. Since the free-cutting spacers at positions opposed to those of the sealing fins existing after the movement of the sealing base plate are maintained in a non-contact state, clearances between the sealing fins and the free-cutting spacers are dimensionally minimized.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: October 21, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Kenjiro Narita, Haruyuki Yamazaki, Takeshi Kudo, Kenichi Murata
  • Patent number: 8500397
    Abstract: A seal structure for a steam turbine is provided, which is capable of suppressing transfer of heat generated by a friction between a rotating portion and a fixed portion to the rotating portion and of suppressing an increase in the temperature of the rotating portion. A labyrinth seal device serves to suppress the amount of steam leaking from a clearance present between each stator blade (fixed portion) of the steam turbine and a rotor (rotating portion). The seal structure for the steam turbine is formed to ensure that permeable spacers made of a permeable metal are provided on the rotor and a seal stationary body and face respective seal fins provided in the labyrinth seal device.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: August 6, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Kenjiro Narita, Haruyuki Yamazaki, Hiroyuki Doi, Kei Kobayashi, Hajime Toriya
  • Publication number: 20120148389
    Abstract: A seal structure for a steam turbine is provided, which is capable of suppressing transfer of heat generated by a friction between a rotating portion and a fixed portion to the rotating portion and of suppressing an increase in the temperature of the rotating portion. A labyrinth seal device serves to suppress the amount of steam leaking from a clearance present between each stator blade (fixed portion) of the steam turbine and a rotor (rotating portion). The seal structure for the steam turbine is formed to ensure that permeable spacers made of a permeable metal are provided on the rotor and a seal stationary body and face respective seal fins provided in the labyrinth seal device.
    Type: Application
    Filed: February 14, 2012
    Publication date: June 14, 2012
    Applicant: HITACHI, LTD.
    Inventors: Kenjiro NARITA, Haruyuki YAMAZAKI, Hiroyuki DOI, Kei KOBAYASHI, Hajime TORIYA
  • Patent number: 8128351
    Abstract: A seal structure for a steam turbine is provided, which is capable of suppressing transfer of heat generated by a friction between a rotating portion and a fixed portion to the rotating portion and of suppressing an increase in the temperature of the rotating portion. A labyrinth seal device serves to suppress the amount of steam leaking from a clearance present between each stator blade (fixed portion) of the steam turbine and a rotor (rotating portion). The seal structure for the steam turbine is formed to ensure that permeable spacers made of a permeable metal are provided on the rotor and a seal stationary body and face respective seal fins provided in the labyrinth seal device.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: March 6, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Kenjiro Narita, Haruyuki Yamazaki, Hiroyuki Doi, Kei Kobayashi, Hajime Toriya
  • Publication number: 20120014778
    Abstract: Subject: To provide a sealing structure, and control method therefor, which improve sealing performance between a rotating region and a fixed region, prevent fins from being damaged, and prevent increases in the amount of steam leakage from any clearances newly formed by further abrasion of an abradable material. Solution: The sealing structure in which free-cutting spacers 28 on a sealing base plate 25 and sealing fins 24 on a rotor 18 are opposed to each other is provided, in the sealing structure of which the sealing base plate 25 is disposed so as to be movable in an axial direction of the rotor 18. When a steam turbine 3 increases in load, a pressure head 30 moves in an axial steam-pressure loading direction of the rotor 18 and the sealing base plate 25 connected to the pressure head 30 moves in the axial steam-pressure loading direction.
    Type: Application
    Filed: July 13, 2011
    Publication date: January 19, 2012
    Applicant: Hitachi, Ltd.
    Inventors: Kenjiro NARITA, Haruyuki YAMAZAKI, Takeshi KUDO, Kenichi MURATA
  • Publication number: 20100278645
    Abstract: Provided are a seal structure and a control method therefor that can improve sealing performance between a rotating portion and a fixed portion, smoothly start up a steam turbine, and suppress the temperature rise of the rotating portion even if the rotating portion is continuously rotated for a long period of time. A seal structure is configured such that seal fins 62 on a seal base-plate 61 side and corresponding breathable spacers 4b on a rotor 2a side are opposed to each other and breathable spacers 4a on the seal base-plate 61 side and corresponding seal fins 2a1 on the rotor 2a side are opposed to each other. The seal base-plate 61 is installed shiftably in a direction coming close to or moving away from the rotor 2a. If steam St has low pressure, the seal fins 62 and the corresponding breathable spacers 4b are not in contact with each other and the seal fins 2a1 and the corresponding breathable spacers 4a are not in contact with each other.
    Type: Application
    Filed: April 28, 2010
    Publication date: November 4, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Kenjiro NARITA, Haruyuki Yamazaki, Hiroyuki Doi, Kei Kobayashi, Hajime Toriya, Takeshi Kudo, Yoshitaka Kojima
  • Publication number: 20090142187
    Abstract: A seal structure for a steam turbine is provided, which is capable of suppressing transfer of heat generated by a friction between a rotating portion and a fixed portion to the rotating portion and of suppressing an increase in the temperature of the rotating portion. A labyrinth seal device serves to suppress the amount of steam leaking from a clearance present between each stator blade (fixed portion) of the steam turbine and a rotor (rotating portion). The seal structure for the steam turbine is formed to ensure that permeable spacers made of a permeable metal are provided on the rotor and a seal stationary body and face respective seal fins provided in the labyrinth seal device.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 4, 2009
    Inventors: Kenjiro NARITA, Haruyuki Yamazaki, Hiroyuki Doi, Kei Kobayashi, Hajime Toriya
  • Patent number: 6053998
    Abstract: A method of manufacturing a rust-preventing cover in which sufficient strength during mounting is ensured and which can be easily removed when not needed. The method of manufacturing a rust-preventing cover is carried out by a WFM manufacturing method rather than a conventional DFM manufacturing method. A mixed aqueous solution having paper fibers as a main material thereof is stored in a water tank. A porous rust-preventing cover mold is immersed therein. Then, the mixed aqueous solution is sucked by a vacuum pump. In this way, a paper fiber surface layer, which later becomes a rust-preventing cover, is formed on a surface of a mold main body of the rust-preventing cover mold at portions to which masking has not been applied. By adjusting a suction time of the vacuum pump, a rust-preventing cover of an arbitrary thickness which corresponds to a thickness required during mounting can be obtained.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: April 25, 2000
    Assignees: Toyota Jidosha Kabushiki Kaisha, Nihon Sekiso Industries Co., Ltd.
    Inventors: Makoto Nitta, Haruyuki Yamazaki
  • Patent number: 4424770
    Abstract: The present invention provides a low boiling point medium evaporator which generates low boiling point medium vapor in the mixture of two components with different boiling points by heating at the risers and mixes said heated two component mixture and said low boiling point medium liquid supplied from the outside of the system and has at least one device provided at the outlet portion of said risers and used both as a heat exchanger to generate saturated vapor of said low boiling point medium vapor by mixing said low boiling point medium liquid and the two phase flow comprised said low boiling point medium vapor and said mixture and passing said two phase flow through said low boiling point medium vapor and as a cyclone to separate said saturated vapor and said mixture.
    Type: Grant
    Filed: October 2, 1981
    Date of Patent: January 10, 1984
    Assignee: The Agency of Industrial Science and Technology
    Inventors: Haruyuki Yamazaki, Yasuaki Akatsu, Seiichiro Sakaguchi
  • Patent number: 4245998
    Abstract: To remove salts from a solution containing the salts, hot air is injected downwards into the solution in a concentrator, and the solution is concentrated by direct contact with the hot air, thereby enhancing an evaporation efficiency in the concentrator and preventing scale deposition in the concentrator and piping system. The solution is forcedly cooled in a crystallizer by direct contact with cool air, thereby making crystals grow in the solution within a short time. The solution and air are circulated in a closed cycle, thereby preventing a secondary environmental pollution.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: January 20, 1981
    Assignees: Hitachi, Ltd., Hitachi Plant Engineering and Construction Co., Ltd.
    Inventors: Isao Okouchi, Kenkichi Izumi, Haruyuki Yamazaki, Sankichi Takahashi