Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Shinji Kuwamura

Yoshihisa Tawada

Kazunori Tsuge

Hiroshi Nakano

Sadao Fuji

Osamu Takamatsu

Kazuhiro Suenobu

The present invention relates to a semiconductor device manufactured by removing a part of a semiconductor layer containing an amorphous semiconductor and which is formed over separate electrodes existing on the same substrate and characterized in that the mean oxygen content of the portion of the semiconductor adjacent the removed portion and 10 .mu.m inward is in a range of 0.5-10 atom %, and to a manufacturing method for the semiconductor device characterized in that the semiconductor layer is removed partly in an oxidative environment by the use of laser ray means. The invention provides semiconductor devices diminished in leak current.

Semiconductor device and its manufacturing method

This invention relates to a battery charger which supplementally charges a secondary battery such as a battery and so forth in an automobile with use of a solar cell in which a diffusion-blocking layer is formed between a semiconductor and a reverse electrode for the purpose of preventing deterioration of a semiconductor layer, and in which electric potential of the secondary battery can be measured and displayed, and in which the solar cell can be securely provided in a compartment of an automobile in such a manner that the solar cell always faces sunbeams, and which can be freely attached and detached.

Battery charger

Growing community of inventors

Takasago, Japan

Shinji Kuwamura