Multilayer capacitor
US-2024339267-A1 · Oct 10, 2024 · US
Ceramic powder and multi-layer ceramic capacitor
US9514883B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9514883-B2 |
| Application number | US-201514657761-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 13, 2015 |
| Priority date | Mar 30, 2012 |
| Publication date | Dec 6, 2016 |
| Grant date | Dec 6, 2016 |
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Abstract
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A multi-layer ceramic capacitor is made by alternately layering a dielectric layer constituted by a sintered body of a ceramic powder, and an internal electrode layer. The ceramic powder contains barium titanate powder having a perovskite structure with a median size of 200 nm or smaller as measured by SEM observation, wherein the barium titanate powder is such that the percentage of barium titanate particles having twin defects in the barium titanate powder is 13% or more as measured by TEM observation and that its crystal lattice c/a is 1.0080 or more. The ceramic powder has a wide range of optimum sintering temperatures and thus offers excellent productivity and is particularly useful in the formation of thin dielectric layers of 1 μm or less.
First claim
Opening claim text (preview).
I claim: 1. A multi-layer ceramic capacitor made by alternately layering a dielectric layer constituted by a sintered body of a ceramic powder, and an internal electrode layer, said ceramic powder containing barium titanate powder having a perovskite structure with a median size of 200 nm or smaller as measured by SEM observation, wherein the barium titanate powder is such that the percentage of barium titanate particles having twin defects in the barium titanate powder is 13% or more as measured by TEM observation and that its crystal lattice c/a is 1.0080 or more. 2. A multi-layer ceramic capacitor according to claim 1 , wherein the median size of the barium titanate powder is 80 to 200 nm. 3. A multi-layer ceramic capacitor according to claim 1 , wherein the percentage of barium titanate particles having twin defects in the barium titanate powder is 13 to 23%. 4. A multi-layer ceramic capacitor according to claim 2 , wherein the percentage of barium titanate particles having twin defects in the barium titanate powder is 13 to 23%. 5. A multi-layer ceramic capacitor according to claim 1 , wherein the crystal lattice c/a of the barium titanate powder is 1.0091 to 1.0105. 6. A multi-layer ceramic capacitor according to claim 2 , wherein the crystal lattice c/a of the barium titanate powder is 1.0091 to 1.0105. 7. A multi-layer ceramic capacitor according to claim 3 , wherein the crystal lattice c/a of the barium titanate powder is 1.0091 to 1.0105. 8. A multi-layer ceramic capacitor according to claim 4 , wherein the crystal lattice c/a of the barium titanate powder is 1.0091 to 1.0105.
Assignees
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Classifications
Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite · CPC title
Curing of mixtures · CPC title
Particulate matter [e.g., sphere, flake, etc.] · CPC title
at an oxygen percentage below that of air · CPC title
characterised by the treatment temperature · CPC title
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- What does patent US9514883B2 cover?
- A multi-layer ceramic capacitor is made by alternately layering a dielectric layer constituted by a sintered body of a ceramic powder, and an internal electrode layer. The ceramic powder contains barium titanate powder having a perovskite structure with a median size of 200 nm or smaller as measured by SEM observation, wherein the barium titanate powder is such that the percentage of barium tit…
- Who is the assignee on this patent?
- Taiyo Yuden Kk
- What technology area does this patent fall under?
- Primary CPC classification H01G4/1227. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 06 2016 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).