Laminated ceramic electronic component
US-2015279566-A1 · Oct 1, 2015 · US
Ceramic electronic component and method of manufacturing the same
US9672963B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9672963-B2 |
| Application number | US-201414305103-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 16, 2014 |
| Priority date | Jun 19, 2013 |
| Publication date | Jun 6, 2017 |
| Grant date | Jun 6, 2017 |
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Abstract
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A ceramic electronic component includes a rectangular or substantially rectangular parallelepiped shaped laminate in which a ceramic layer and an internal electrode are alternately laminated and an external electrode provided on a portion of a surface of the laminate and electrically connected to the internal electrode. The external electrode includes an inner external electrode covering a portion of the surface of the laminate and including a mixture of a resin component and a metal component and an outer external electrode covering the inner external electrode and including a metal component. The inner external electrode includes, as a metal component, a first metal component of which a portion forms an alloy with the internal electrode so as to connect the internal electrode and the inner external electrode to each other, and a second metal component higher in melting point than the first metal component, of which a portion forms an alloy with the first metal component so as to connect the inner external electrode and the outer external electrode to each other. A concentration of a metal in a surface layer of the inner external electrode is not lower than about 17%.
First claim
Opening claim text (preview).
What is claimed is: 1. A ceramic electronic component, comprising: a rectangular or substantially rectangular parallelepiped laminate in which a ceramic layer and an internal electrode are alternately laminated; and an external electrode located on a portion of a surface of the laminate and electrically connected to the internal electrode; wherein the external electrode includes an inner external electrode covering a portion of the surface of the laminate and includes a mixture of a resin component and a metal component and an outer external electrode covering the inner external electrode and including a metal component; the inner external electrode includes, as a metal component, a first metal component of which a portion forms an alloy with the internal electrode so as to connect the internal electrode and the inner external electrode to each other and a second metal component higher in melting point than the first metal component, of which a portion forms an alloy with the first metal component so as to connect the inner external electrode and the outer external electrode to each other; and a concentration of a metal in a surface layer of the inner external electrode is not lower than about 17.5% and not higher than about 19.7%. 2. The ceramic electronic component according to claim 1 , wherein the metal component of the outer external electrode is Ni. 3. The ceramic electronic component according to claim 1 , wherein the first metal component is Sn. 4. The ceramic electronic component according to claim 1 , wherein the second metal component is Ag or Cu. 5. The ceramic electronic component according to claim 1 , wherein the ceramic electronic component is one of a piezoelectric component, a thermistor, and an inductor. 6. The ceramic electronic component according to claim 1 , wherein the concentration of the metal in the surface layer of the inner external electrode is a ratio of a total of atomic percentage of the first metal component and atomic percentage of the second metal component to a total of an atomic percentage of the first metal component, an atomic percentage of the second metal component, and an atomic percentage of the resin component in the surface layer extending from an outer surface of the inner external electrode to a prescribed depth therein. 7. The ceramic electronic component according to claim 6 , wherein the atomic percentage of the resin component is defined as an atomic percentage of C contained in the resin component. 8. The ceramic electronic component according to claim 6 , wherein the prescribed depth is about 5 nm from the outer surface of the inner external electrode.
Assignees
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Classifications
electrically connecting two or more layers of a stacked or rolled capacitor · CPC title
Piezoelectric device making · CPC title
Electricity · mapped topic
Stacked capacitors (H01G4/33 takes precedence) · CPC title
Electric condenser making · CPC title
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- What does patent US9672963B2 cover?
- A ceramic electronic component includes a rectangular or substantially rectangular parallelepiped shaped laminate in which a ceramic layer and an internal electrode are alternately laminated and an external electrode provided on a portion of a surface of the laminate and electrically connected to the internal electrode. The external electrode includes an inner external electrode covering a port…
- Who is the assignee on this patent?
- Murata Manufacturing Co
- What technology area does this patent fall under?
- Primary CPC classification H01C7/008. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 06 2017 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).