MULTILAYER CERAMIC CAPACITOR AND METHOD FOR MANUFACTURING SAME

摘要

A multilayer ceramic capacitor that includes a layered body in which dielectric layers and internal electrode layers are layered alternately, an external electrode on a surface of the layered body and a plating layer on a surface of the external electrode. The external electrode contains Cu, and a protective layer containing Cu2O is provided at a joining portion between the external electrode and the plating layer. When heat is applied to the layered body after the external electrode is removed, a ratio of an arithmetic mean value Xa of a quantity of hydrogen generated per unit temperature in a range higher than or equal to 350° C. with respect to an arithmetic mean value Y of a quantity of hydrogen generated per unit temperature in a range higher than or equal to 230° C. and lower than or equal to 250° C. (Xa/Y) is less than or equal to 0.66.

主权项

1. A multilayer ceramic capacitor, comprising:
a layered body in which dielectric layers made of a ceramic dielectric material and internal electrode layers having a base metal as a main component thereof are layered alternately; and an external electrode having an external electrode main body on a surface of said layered body and conductively connected to said internal electrodes drawn out to the surface of said layered body, and a plating layer on a surface of said external electrode main body, said external electrode main body containing Cu; and a protective layer containing Cu2O at a joining portion between said external electrode main body and said plating layer, wherein, when heat is applied to said layered body after said external electrode is removed therefrom, and a quantity of hydrogen generated from said layered body is measured, a ratio of an arithmetic mean value Xa of a quantity of hydrogen generated per unit temperature in a range higher than or equal to 350° C. with respect to an arithmetic mean value Y of a quantity of hydrogen generated per unit temperature in a range higher than or equal to 230° C. and lower than or equal to 250° C. (Xa/Y) is less than or equal to 0.66.