Varistor and method for manufacturing the same
US-11908599-B2 · Feb 20, 2024 · US
Multilayer varistor
US12308146B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12308146-B2 |
| Application number | US-202218068282-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 19, 2022 |
| Priority date | Dec 23, 2021 |
| Publication date | May 20, 2025 |
| Grant date | May 20, 2025 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A multilayer varistor includes: a sintered compact; an internal electrode provided inside the sintered compact; a high-resistivity layer arranged to cover the sintered compact at least partially and containing element Si; and an external electrode arranged to cover the high-resistivity layer partially, electrically connected to the internal electrode, and containing silver as a main component thereof. A ratio of a total mass of the alkali metals and the alkaline earth metals to a mass of the element Si in a surface region of the high-resistivity layer is equal to or less than 0.6.
First claim
Opening claim text (preview).
The invention claimed is: 1. A multilayer varistor comprising: a sintered compact; an internal electrode provided inside the sintered compact; a high-resistivity layer arranged to cover the sintered compact at least partially and containing element Si; and an external electrode arranged to cover the high-resistivity layer partially, electrically connected to the internal electrode, and containing silver as a main component thereof, a ratio of a total mass of the alkali metals and the alkaline earth metals to a mass of the element Si in a surface region of the high-resistivity layer being equal to or less than 0.6. 2. The multilayer varistor of claim 1 , wherein the ratio is equal to or greater than 0.001. 3. The multilayer varistor of claim 1 , wherein the total mass of the alkali metals and the alkaline earth metals is a total mass of elements Na, K, Mg, and Ca. 4. The multilayer varistor of claim 1 , wherein the high-resistivity layer contains SiO 2 as a main component thereof. 5. The multilayer varistor of claim 1 , wherein the high-resistivity layer contains ZnSiO 4 as a main component thereof. 6. The multilayer varistor of claim 1 , wherein a mass concentration of the alkali metals and the alkaline earth metals in the high-resistivity layer is lower than a mass concentration of the alkali metals and the alkaline earth metals in the sintered compact.
Assignees
Inventors
Classifications
voltage responsive, i.e. varistors · CPC title
the terminals embracing or surrounding the resistive element (H01C1/142 takes precedence) · CPC title
ZnO type · CPC title
comprising a plurality of layers stacked between terminals · CPC title
- H01C7/102Primary
Varistor boundary, e.g. surface layers (H01C7/12 takes precedence) · CPC title
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- What does patent US12308146B2 cover?
- A multilayer varistor includes: a sintered compact; an internal electrode provided inside the sintered compact; a high-resistivity layer arranged to cover the sintered compact at least partially and containing element Si; and an external electrode arranged to cover the high-resistivity layer partially, electrically connected to the internal electrode, and containing silver as a main component t…
- Who is the assignee on this patent?
- Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01C7/102. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 20 2025 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).