Multi-layer inductor
AssigneeTDK Corporation
InventorsAkihiko Oide, Makoto Yoshino, Tomoki Okada, Masashi Shimoyasu, Daiki Kato, Hideki Saitou, Seiji Osada, Kazuhiro Ebina
Life of this patent
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Abstract
In the multi-layer inductor, a through conductor provided in a sintered element body includes a pair of extracting conductors and a pair of internal conductors, and an end portion of the extracting conductor and an end portion of the internal conductor overlap each other in a stacking direction of the element body. Thus, the amount of shrinkage of each conductor during sintering of the element body is reduced, and internal stress generated in the element body after sintering is prevented.
Claims5
A multi-layer inductor comprising:
- a sintered element body including a plurality of layers stacked and having a pair of end surfaces facing each other in a first direction orthogonal to a stacking direction of the plurality of layers;
- a through conductor provided in the sintered element body and extending between the pair of end surfaces, both end portions of the through conductor are exposed at the end surfaces;
- and
- a pair of external electrodes provided on the end surfaces of the sintered element body and covering both the end portions of the through conductor exposed to the end surfaces, respectively,
- wherein the through conductor includes:
- a pair of extracting conductors respectively constituting both the end portions of the through conductor and each having a first end portion exposed from the end surface of the element body and a second end portion located inside the element body;
- a plurality of inner conductors connecting the pair of extracting conductors to each other and having ends overlapping the second end portions of the extracting conductors in the stacking direction of the plurality of layers, the plurality of inner conductors being in direct contact with the extracting conductors;
- wherein a longitudinal direction of each inner conductor of the plurality of inner conductors extends parallel to the first direction, and
- wherein ends of inner conductors of the plurality of inner conductors that are adjacent to each other are in direct contact and overlap each other in the stacking direction of the plurality of layers,
- wherein the plurality of inner conductors and the pair of extracting conductors are disposed in a step manner, and
- wherein positions of extracting conductors of the pair of extracting conductors are different with respect to the stacking direction of the plurality of layers.
Dependencies are inferred from the claim text.