Semiconductive ceramic composition and semiconductive ceramic capacitor.

摘要

A semiconductive ceramic composition capable of exhibiting excellent electrical and physical characteristics sufficient to be used for a boundary-layer type semiconductive ceramic capacitor and such a capacitor capable of being increased in dielectric constant and insulation resistance and exhibiting excellent solderability and tensile strength of electrodes. The composition includes a SrTiO3 base material and an additive for semiconductivity consisting of Y2O3 and Nb2O5. The Y2O3 and Nb2O5 each are present in an amount of 0.1 to 0.4 mol% based on the composition. The capacitor includes a semiconductive ceramic body (10) formed of the composition, a first conductive layer (12) formed on each of both surfaces of the body (10) and a second conductive layer (18) formed on the first conductive layer (12). A process for manufacturing the capacitor is also provided.