Patents by Inventor Izumi Ikeo

Izumi Ikeo 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).

  • Fluid dynamic bearing
    Patent number: 6722785
    Abstract: A fluid dynamic bearing has a shaft (11) fitted in a sleeve (12) for rotation, with a fluid filled therebetween. The shaft (11) and/or sleeve (12) is formed with a pattern consisting of grooves (111g) and lands for generating a pressure distribution in the fluid and then covered with a diamond-like carbon film (11c) over the surface of the grooves and the surface of the lands.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: April 20, 2004
    Assignee: TDK Corporation
    Inventors: Izumi Ikeo, Masatoshi Nakayama
  • Solar cell and method for producing electrode for solar cell
    Patent number: 5891264
    Abstract: An aluminum film is formed as a photoreflective electrode in the side opposite to the light incident side of a solar cell by sputtering at a substrate temperature of 50.degree. to 200.degree. C. using a target, aluminum containing silicon as an impurity element at 0.1 to 6.0 weight %. An aluminum film or a silver film into which an impurity element is not added is formed on the above aluminum film, to obtain a texture structure having convex and concave shapes. When an organic resin film substrate is used, components (released as a gas by heating and a vacuum atmosphere) such as water within the organic resin film is removed after the aluminum film is formed.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: April 6, 1999
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Hisato Shinohara, Hisao Morooka, Izumi Ikeo, Akemi Takenouchi, Setsuo Nakajima, Yasuyuki Arai
  • Solar cell
    Patent number: 5711824
    Abstract: An aluminum film is formed as a photoreflective electrode at the side opposite to the light incident side of a solar cell by sputtering at a substrate temperature of 50.degree. to 200.degree. C. using a target of aluminum containing silicon as an impurity element at 0.1 to 6.0 weight %. An aluminum film or a silver film in which an impurity element is not added is formed on the above aluminum film, to obtain a texture structure having convex and concave shapes. When an organic resin film substrate is used, components (released as a gas by heating in a vacuum atmosphere) such as water within the organic resin film are removed after the aluminum film is formed.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: January 27, 1998
    Assignees: Semiconductor Energy Laboratory Co., Ltd., TDK Corporation
    Inventors: Hisato Shinohara, Hisao Morooka, Izumi Ikeo, Akemi Takenouchi, Setsuo Nakajima, Yasuyuki Arai