Multilayer ceramic capacitor
AssigneeTaiyo Yuden Co., Ltd.
InventorRyo ITO
Life of this patent
Estimating the term…
Abstract
A multilayer ceramic capacitor includes an element body in which dielectric layers and internal electrode layers are alternately laminated in a first axis direction, in which the dielectric layers include: ceramic particles containing a perovskite compound represented by a general formula ABO3; silicon; and a rare-earth element, the perovskite compound contains titanium, an amount of the silicon is 3 atomic % or more relative to a total amount of the titanium, and the multilayer ceramic capacitor satisfies Expression I, 0 . 3 ≤ Ly / Ln < 3 5 Expression I where Ln is a distance (μm) between the internal electrode layers, and Ly is an average distance (nm) between the ceramic particles contained in a region where Ra(x)≥2Ra(0).
Claims6
A multilayer ceramic capacitor, comprising:
- an element body in which dielectric layers and internal electrode layers are alternately laminated in a first axis direction, wherein
- the dielectric layers include:
- ceramic particles containing a perovskite compound represented by a general formula ABO3;
- silicon;
- and a rare-earth element,
- the perovskite compound contains titanium,
- an amount of the silicon is 3 atomic % or more relative to a total amount of the titanium, and
- the multilayer ceramic capacitor satisfies Expression I,
- 0
- .
- 3
- ≤
- Ly
- /
- Ln
- <
- 3
-
- 5
- Expression
-
- I
- where Ln is a distance (μm) between the internal electrode layers, and Ly is an average distance (nm) between the ceramic particles contained in a region where Ra(x)≥2Ra(0), in which Ra is a ratio of the amount of the silicon (atomic %) to an amount of the rare-earth element (atomic %), Ra(0) is an average value of Ra in the dielectric layers interposed between the internal electrode layers, and Ra(x) is a value of the Ra at a desired position in the dielectric layers interposed between the internal electrode layers.
Dependencies are inferred from the claim text.