MULTILAYER CERAMIC CAPACITOR

摘要

A ceramic body includes outer layer portions of about 15 μm or more and about 25 μm or less in thickness outside an inner layer portion where internal electrodes are stacked with dielectric ceramic layers interposed therebetween, the inner layer portion includes inner cover electrodes opposed to the internal electrode located outermost in the stacking direction with the dielectric ceramic layers interposed therebetween, the outer layer portions include outer cover electrodes opposed to the inner cover electrodes with the dielectric ceramic layers interposed therebetween, the inner cover electrodes have a coverage of about 75% or more and about 100% or less, the outer cover electrodes have a coverage of about 50% or more and about 70% or less, and boundary layers containing Mg and Mn are provided at the boundaries between the outer cover electrodes and the dielectric ceramic layers located outside the electrodes.

主权项

1. A multilayer ceramic capacitor comprising:
a ceramic body including a plurality of dielectric ceramic layers and a plurality of internal electrodes alternately stacked in a stacking direction; and external electrodes provided on the ceramic body and connected to the plurality of internal electrodes; wherein the ceramic body includes an outer cover electrode and an inner cover electrode, the outer cover electrode is located outermost in the stacking direction among the plurality of internal electrodes, the inner cover electrode is located next to the outer cover electrode among the plurality of internal electrodes; the ceramic body includes an outer layer portion and an inner layer portion, the outer layer portion includes the outer cover electrode and a pair of dielectric ceramic layers interposing the outer cover electrode, the inner layer portion is adjacent to the outer layer portion and includes the inner cover electrode; a dimension in the stacking direction of the outer layer portion is about 15 μm or more and about 25 μm or less; the inner cover electrode has a coverage of about 75% or more and about 100% or less, the coverage of the inner cover electrode is a proportion of the internal electrode covering the dielectric ceramic layer in a region between both ends of the inner cover electrode; the outer cover electrode has a coverage of about 50% or more and about 70% or less, the coverage of the outer cover electrode is a proportion of the internal electrode covering the dielectric ceramic layer in a region between both ends of the outer cover electrode; and the ceramic body includes a boundary layer containing Mg and Mn adjacent to the outer cover electrode and to the dielectric layer located outside the outer cover electrode.