Monolithic ceramic electronic component and producing method therefor

摘要

A monolithic ceramic electronic component including coil conductors is capable of reducing the number of stacked ceramic layers without sacrifice of the performance of coils and be capable of increasing the number of turns of the coils without increasing the size in. In the monolithic ceramic electronic component, coil conductors having more than one turn for one ceramic layer are formed. The coil conductors include surface coil conductors that are located along surfaces of sequentially stacked ceramic layers and intra-layer coil conductors that are located inside the ceramic layers so as not to extend beyond the thickness of the individual ceramic layers. The surface coil conductors and the intra-layer coil conductors are connected in series with connecting portions therebetween.

主权项

1. A monolithic ceramic electronic component comprising a component body including a plurality of stacked ceramic layers and internal conductors arranged in association with specific layers of the ceramic layers, the internal conductors including coil conductors extending in a coil shape so as to be connected sequentially over the plurality of ceramic layers,
wherein the coil conductors have more than one turn for the individual ceramic layers, wherein the coil conductors include surface coil conductors that are located along surfaces of the ceramic layers, intra-layer coil conductors each of which is located inside the respective ceramic layer so as not to extend beyond the thickness of the respective ceramic layer, and connecting portions that allow series connection between the surface coil conductors and the intra-layer coil conductors, wherein one of the intra-layer coil conductors extends through a respective ceramic layer in a thickness direction of the respective ceramic layer and along the same surface of the respective ceramic layer as the one of surface coil conductors, wherein the one surface coil conductor and the one intra-layer coil conductor are located at different positions on the same surface in a main-surface direction of the respective ceramic layer except for a respective connecting portion, and wherein the one intra-layer coil conductor includes an end edge portion positioned a spaced distance from the respective connecting portion in the main-surface direction and physically connected to a surface coil conductor formed on a ceramic layer adjacent to the respective ceramic layer, and the one intra-layer coil conductor further including an intermediate portion extending from the end edge portion toward the respective connecting portion in the main-surface direction, the intermediate portion further extending from the same surface of the respective ceramic layer to an opposite surface of the respective ceramic layer in the thickness direction, the intermediate portion including a cross-sectional extent in the thickness direction larger than a cross-sectional extent of the one surface coil conductor in the thickness direction.