Patents by Inventor Yasuhiko Murata

Yasuhiko Murata 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: 6483167
    Abstract: In a semiconductor device and production method thereof, a technique is used to prevent film separation of the bottom electrode occurring during a heat treatment process which is carried out to make the bottom electrode closely packed and in the heat treatment process for producing dielectric crystallization. In the production method, a glue layer including an insulator is formed between SiO2 insulation layer and the inner wall of a concave hole. The SiO2 layer 14 is located on the Si board 11, and Si plug 12 and a barrier layer 13 are formed therein. A glue layer 16 is formed on the inner wall of the hole of the SiO2 insulation layer 15, and a bottom electrode 17 comprising Ru is formed on the barrier layer 13 and glue layer 16. Dielectric film 18 comprising BST and a top electrode 19 comprising Ru are laminated sequentially on the bottom electrode 17, to form a dielectric device with the bottom electrode 17.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: November 19, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Toshihide Nabatame, Masaru Kadoshima, Takaaki Suzuki, Tetsuo Fujiwara, Seiji Watahiki, Yasuhiko Murata, Mitsuo Hayashibara
  • Patent number: 5016721
    Abstract: Described is a full-turn type working machine which generally consists of a lower travelling body and an upper rotary body. The upper rotary body includes a machine room, an operator's cabin, a fuel tank and a counterweight which are laid out within a circle of a predetermined rotational radius R. In addition, a door which is fitted in a side panel of the operator's cabin can be opened largely rearward through an angle greater than 180 degrees and received within the circle of the predetermined rotational angle in an opened state.
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: May 21, 1991
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Nobuyoshi Yamamoto, Yasuhiko Murata, Fumimasa Saeki, Hirosige Kurosaka
  • Patent number: 4907667
    Abstract: Described is a full-turn working machine which generally consists of a lower travelling body and an upper rotary body. The upper rotary body includes a machine room, an operator's cabin, a fuel tank and a counterweight which are laid out within a circle of a predetermined rotational radius R. In addition, a door which is fitted in a side panel of the operator's cabin can be opened largely rearward through an angle greater than 180 degrees and received within the circle of the predetermined rotational angle in an opened state.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: March 13, 1990
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Nobuyoshi Yamamoto, Yasuhiko Murata, Fumimasa Saeki, Hirosige Kurosaka
  • Patent number: 4464898
    Abstract: A hydraulic power system having a variable displacement hydraulic pump, a hydraulic motor driven by the hydraulic pump for actuating a load, the pump and motor being connected to constitute a closed hydraulic circuit, hydraulic servo for controlling the displacement volume of the pump, and motor stopping device including a brake arrangement adapted to release the motor from a braked condition when a control pressure from a hydraulic fluid source is received.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: August 14, 1984
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Yukio Aoyagi, Shuichi Ichiyama, Yasuhiko Murata