Multilayer ceramic electronic device
US-9305708-B2 · Apr 5, 2016 · US
Multilayer ceramic electronic component
US11056280B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11056280-B2 |
| Application number | US-201916511030-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 15, 2019 |
| Priority date | Jul 31, 2018 |
| Publication date | Jul 6, 2021 |
| Grant date | Jul 6, 2021 |
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Abstract
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The object of the present invention is to provide a multilayer ceramic electronic component having improved highly accelerated lifetime and specific permittivity. A multilayer ceramic electronic component comprising a multilayer body in which an internal electrode layer and a dielectric layer are stacked in alternating manner, wherein the dielectric layer comprises a dielectric ceramic composition having a main component expressed by a general formula ABO3 (A is Ba and the like, and B is Ti and the like) and a rare earth component R, a segregation phase including the rare earth component R exists in the dielectric layer, an area ratio of the segregation phases in a cross section along a stacking direction is 104 ppm to 961 ppm, and 96% or more of a total area of the segregation phases contact with the internal electrode layer.
First claim
Opening claim text (preview).
What is claimed is: 1. A multilayer ceramic electronic component comprising a multilayer body in which an internal electrode layer and a dielectric layer are stacked in alternating manner, wherein the dielectric layer comprises a dielectric ceramic composition having a main component expressed by a general formula ABO 3 (A is at least one selected from the group consisting of Ba, Sr, and Ca; and B is at least one selected from the group consisting of Ti, Zr, and Hf) and a rare earth component R (R is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), segregation phase particles including the rare earth component R exist in the dielectric layer, an area ratio of segregation phase particles in a cross section along a stacking direction is 104 ppm to 961 ppm, and a total area of the segregation phase particles that contacts with the internal electrode layer is 96% or more of a total area of all segregation phase particles. 2. The multilayer ceramic electronic component according to claim 1 , wherein a maximum length of the segregation phase in the stacking direction is 100% or less with respect to an average thickness of the internal electrode layer. 3. The multilayer ceramic electronic component according to claim 1 , wherein 50% or more of the total segregation phases in terms of number base are embedded in the internal electrode layer. 4. The multilayer ceramic electronic component according to claim 2 , wherein 50% or more of the total segregation phases in terms of number base are embedded in the internal electrode layer. 5. A multilayer ceramic electronic component comprising a multilayer body in which an internal electrode layer and a dielectric layer are stacked in alternating manner, wherein the dielectric layer comprises a dielectric ceramic composition having a main component expressed by a general formula ABO 3 (A is at least one selected from the group consisting of Ba, Sr, and Ca; and B is at least one selected from the group consisting of Ti, Zr, and Hf) and a rare earth component R (R is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), segregation phase particles including the rare earth component R exist in the dielectric layer, an area ratio of segregation phase particles in a cross section along a stacking direction is 104 ppm to 961 ppm, and a ratio of a number of segregation phase particles that contact with the internal electrode layer to a total number of all segregation phase particles is 96% or more.
Assignees
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Classifications
Stacked capacitors (H01G4/33 takes precedence) · CPC title
Hydrogen containing atmosphere · CPC title
Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide · CPC title
based on barium titanates · CPC title
Alkaline earth titanates · CPC title
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- What does patent US11056280B2 cover?
- The object of the present invention is to provide a multilayer ceramic electronic component having improved highly accelerated lifetime and specific permittivity. A multilayer ceramic electronic component comprising a multilayer body in which an internal electrode layer and a dielectric layer are stacked in alternating manner, wherein the dielectric layer comprises a dielectric ceramic composit…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification C04B35/4682. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 06 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).