Patent ID: 6795295
Filing Date: 2004-09-21
Classification: H01G

Abstract:
A multi-layer ceramic capacitor comprising,a plurality of dielectric ceramic layers, each having first and second layer planes; a plurality of first internal electrodes provided on the first layer planes of the dielectric ceramic layers and a plurality of the second internal electrodes provided on the second layer planes of the dielectric ceramic layers, the dielectric layers being sandwiched by the first and second internal electrodes; and a plurality of first and second columnar electrodes penetrating the dielectric ceramic layers in a direction normal to the layer planes of the ceramic layers, the first columnar electrodes being electrically connected to the first internal electrodes and the second columnar electrodes being electrically connected to the second internal electrodes, wherein the first and second columnar electrodes each has a corrugation including smaller diameter portions and larger diameter portions, wherein the first internal electrodes are electrically connected to the first columnar electrodes at larger diameter portions of the first columnar electrodes and the second internal electrodes are electrically connected to the second columnar electrodes at larger diameter portions of the second columnar electrodes, and wherein circumferential edges of the dielectric ceramic layers intrude into the first and second columnar electrodes at the smaller diameter portions of the first and second columnar electrodes, respectively.