PURPOSE: To provide a laminated grain boundary insulation type semiconductor ceramic capacitor which ensures less fluctuation of electrical characteristics and high reliability in a laminated grain boundary insulation type semiconductor ceramic capacitor used in a veriety of electronic equipment.
CONSTITUTION: In a laminated grain boundary insulation type semiconductor ceramic capacitor in which, a plurality of layers of internal electrodes 5 is provided in such a manner that these electrodes alternately reach the end portions provided opposed thereto, in a grain boundary insulation type semiconductor ceramics 1 and external electrodes 3, 4 are provided to both end portions of these internal electrodes 5, the semiconductor ceramics 1 is turned semiconductive by reduction, sufficiently and uniformly up to its internal part by opening the holes 6 to the internal electrodes 5 up to the total area of 5 to 30% for the effective electrode area. Thereby, fluctuation of electrical characteristics can be lowered and reliability can be improved.
TAKAMI AKIHIRO
OGOSE YOICHI
WAKAHATA YASUO
UENO IWAO
