Manufacturing process of multilayer capacitors

摘要

A process for the preparation of a multilayer ceramic capacitor which process comprises: i) forming a stack of a plurality of layers of a sinterable ceramic dielectric composition interleaved with inner electrodes of nickel oxide, or a mixture containing nickel oxide; ii) co-firing the said multilayer stack in air or an oxygen-containing atmosphere in order to form a dense monolith; iii) firing the monolith produced in step (ii) in a reducing atmosphere whilst maintaining an oxygen partial pressure in the range of from 10<-5> to 10<-15> in order to reduce the nickel oxide inner electrodes to nickel whilst avoiding reduction of the ceramic dielectric composition; and iv) annealing the monolith produced in step (iii) in air, or an oxygen containing atmosphere.