Piezoelectric element, piezoelectric actuator, and head suspension
US-2016196842-A1 · Jul 7, 2016 · US
Piezoelectric element and piezoelectric actuator
US10109782B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10109782-B2 |
| Application number | US-201615227249-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 3, 2016 |
| Priority date | Aug 6, 2015 |
| Publication date | Oct 23, 2018 |
| Grant date | Oct 23, 2018 |
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- Title
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Abstract
Official abstract text for this publication.
A piezoelectric element includes a piezoelectric body, an external electrode, and an internal electrode. The piezoelectric body includes first and second main surfaces opposing each other. The external electrode is disposed on the first main surface and has a first polarity. The internal electrode is disposed in the piezoelectric body to oppose the external electrode in a direction in which the first main surface and the second main surface oppose each other and has a second polarity different from the first polarity. A region from the internal electrode to the external electrode in the piezoelectric body is a polarizing region, and a region from the internal electrode to the second main surface in the piezoelectric body is a non-polarizing region.
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric element, comprising: a piezoelectric body including first and second main surfaces opposing each other; an external electrode disposed on the first main surface and having a first polarity; and an internal electrode disposed in the piezoelectric body to oppose the external electrode in a direction in which the first main surface and the second main surface oppose each other and having a second polarity different from the first polarity, wherein a region from the internal electrode to the external electrode in the piezoelectric body is a polarizing region, and a region from the internal electrode to the second main surface in the piezoelectric body is a non-polarizing region. 2. The piezoelectric element according to claim 1 , wherein a distance from the internal electrode to the external electrode is equal to or more than a distance from the internal electrode to the second main surface. 3. The piezoelectric element according to claim 1 , wherein a thickness is equal to or less than 100 μm. 4. The piezoelectric element according to claim 2 , wherein a thickness is equal to or less than 100 μm. 5. A piezoelectric actuator, comprising: the piezoelectric element according to claim 1 ; and a supporting member supporting the first main surface of the piezoelectric element via adhesive resin.
Assignees
Inventors
Classifications
Electricity · mapped topic
Electricity · mapped topic
- G11B5/5552Primary
using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means · CPC title
Electricity · mapped topic
- H01L41/09Primary
Electricity · mapped topic
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- What does patent US10109782B2 cover?
- A piezoelectric element includes a piezoelectric body, an external electrode, and an internal electrode. The piezoelectric body includes first and second main surfaces opposing each other. The external electrode is disposed on the first main surface and has a first polarity. The internal electrode is disposed in the piezoelectric body to oppose the external electrode in a direction in which the…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification G11B5/5552. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Oct 23 2018 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).