Multilayer varistor and method of manufacturing the same
US-2023143255-A1 · May 11, 2023 · US
Multilayer varistor
US12334235B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12334235-B2 |
| Application number | US-202218064650-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2022 |
| Priority date | Dec 21, 2021 |
| Publication date | Jun 17, 2025 |
| Grant date | Jun 17, 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 of the present disclosure includes a sintered body, a first internal electrode, a second internal electrode, a first external electrode, a second external electrode, and a high-resistance layer. The first internal electrode and the second internal electrode are disposed in the sintered body. The first external electrode is disposed on a surface of the sintered body and is electrically connected to the first internal electrode. The second external electrode is disposed on the surface of the sintered body and is electrically connected to the second internal electrode. The high-resistance layer covers at least part of the surface of the sintered body, and the high-resistance layer has a surface having a plurality of cracks.
First claim
Opening claim text (preview).
The invention claimed is: 1. A multilayer varistor comprising: a sintered body; a first internal electrode and a second internal electrode which are disposed in the sintered body; a first external electrode disposed on a surface of the sintered body and electrically connected to the first internal electrode; a second external electrode disposed on the surface of the sintered body and electrically connected to the second internal electrode; and a high-resistance layer covering at least part of the surface of the sintered body, wherein: the high-resistance layer has a surface having a plurality of cracks, and an arithmetic mean value of lengths of the plurality of cracks is greater than or equal to 10 μm and less than or equal to 50 μm. 2. The multilayer varistor of claim 1 , wherein an arithmetic mean value of widths of the plurality of cracks is greater than or equal to 0.1 μm and less than or equal to 2 μm. 3. The multilayer varistor of claim 2 , wherein the plurality of cracks each have a deepest portion located within the high-resistance layer. 4. The multilayer varistor of claim 1 , wherein an average thickness of the high-resistance layer is greater than or equal to 0.01 μm and less than or equal to 5 μm. 5. The multilayer varistor of claim 1 , wherein the plurality of cracks each have a deepest portion located within the high-resistance layer. 6. The multilayer varistor of claim 1 , wherein the high-resistance layer includes SiO 2 as a major component. 7. The multilayer varistor of claim 1 , wherein the high-resistance layer includes ZnSiO 4 as a major component. 8. The multilayer varistor of claim 1 , wherein an arithmetic mean roughness of the surface of the high-resistance layer is greater than or equal to 0.06 μm and less than or equal to 0.9 μm. 9. A multilayer varistor comprising: a sintered body; a first internal electrode and a second internal electrode which are disposed in the sintered body; a first external electrode disposed on a surface of the sintered body and electrically connected to the first internal electrode; a second external electrode disposed on the surface of the sintered body and electrically connected to the second internal electrode; and a high-resistance layer covering at least part of the surface of the sintered body, wherein: the high-resistance layer has a surface having a plurality of cracks, and an arithmetic mean value of widths of the plurality of cracks is greater than or equal to 0.1 μm and less than or equal to 2 μm. 10. The multilayer varistor of claim 9 , wherein an average thickness of the high-resistance layer is greater than or equal to 0.01 μm and less than or equal to 5 μm. 11. The multilayer varistor of claim 9 , wherein the plurality of cracks each have a deepest portion located within the high-resistance layer. 12. A multilayer varistor comprising: a sintered body; a first internal electrode and a second internal electrode which are disposed in the sintered body; a first external electrode disposed on a surface of the sintered body and electrically connected to the first internal electrode; a second external electrode disposed on the surface of the sintered body and electrically connected to the second internal electrode; and a high-resistance layer covering at least part of the surface of the sintered body, wherein: the high-resistance layer has a surface having a plurality of cracks, and an average thickness of the high-resistance layer is greater than or equal to 0.01 μm and less than or equal to 5 μm. 13. The multilayer varistor of claim 12 , wherein the plurality of cracks each have a deepest portion located within the high-resistance layer.
Assignees
Inventors
Classifications
comprising a plurality of layers stacked between terminals · CPC title
- H01C7/112Primary
ZnO type · CPC title
the terminals embracing or surrounding the resistive element (H01C1/142 takes precedence) · CPC title
- H01C7/102Primary
Varistor boundary, e.g. surface layers (H01C7/12 takes precedence) · CPC title
adapted for baking · CPC title
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Frequently asked questions
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- What does patent US12334235B2 cover?
- A multilayer varistor of the present disclosure includes a sintered body, a first internal electrode, a second internal electrode, a first external electrode, a second external electrode, and a high-resistance layer. The first internal electrode and the second internal electrode are disposed in the sintered body. The first external electrode is disposed on a surface of the sintered body and is …
- Who is the assignee on this patent?
- Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01C7/112. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 17 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).