Semiconductor Energy Laboratory Co., Ltd.

Tdk Corporation

Izumi Ikeo

Yasuyuki Arai

Setsuo Nakajima

Hisato Shinohara

Hisao Morooka

Akemi Takenouchi

Masatoshi Nakayama

A fluid dynamic bearing has a shaft ( ) fitted in a sleeve ( ) for rotation, with a fluid filled therebetween. The shaft ( ) and/or sleeve ( ) is formed with a pattern consisting of grooves ( ) and lands for generating a pressure distribution in the fluid and then covered with a diamond-like carbon film ( ) over the surface of the grooves and the surface of the lands.

Fluid dynamic bearing

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.

Solar cell and method for producing electrode for solar cell

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.

Solar cell

Growing community of inventors

Yamanashi, Japan

Izumi Ikeo