Murata Manufacturing Co., Ltd.

Ryoichi Urahara

Masahiko Kawase

Yasuhiro Nabika

Norimitsu Kitoh

Yoshiaki Abe

Norimitsu Kito

Ikuya Taniguchi

Takahiko Kawahara

After a plurality of electronic devices such as thermistor elements are produced, each having electrodes formed on the surface of a ceramic body, they are separated into groups according to their measured resistance values. Those with resistance values smaller than a specified allowable range are repaired, having their electrodes abraded such that their resistance values are increased and brought into the specified allowable range.

Method of producing electronic devices with uniform resistance values

A semiconducting ceramic whose rush breakdown voltage is high and which hardly cracks during lamination is provided. In the semiconducting ceramic having a positive resistance-temperature characteristic, the ratio of intra-granular resistance of the crystal grains and inter-granular resistance between crystal grains which together determine the value of resistance of the semiconducting ceramic is set so that the intra-granular resistance is less than about 20% of the value of resistance of the semiconducting ceramic (not including 0%).

Semiconductive ceramic

Growing community of inventors

Shiga, Japan

Ryoichi Urahara