Piezoelectric element for speaker and manufacturing method therefor
US11968903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Apr 23, 2024 |
| Priority date | — |
| Expiry date | Nov 16, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a piezoelectric element for a speaker and a method of manufacturing the same. The piezoelectric element for a speaker includes a plurality of piezoelectric ceramic layers stacked on one another in a thickness direction, and a plurality of electrodes provided to be connected to middle portions of sides of the plurality of piezoelectric ceramic layers along external walls of the plurality of stacked piezoelectric ceramic layers, wherein middle portions of some sides from among a plurality of sides of each of the plurality of piezoelectric ceramic layers are etched, and wherein the plurality of piezoelectric ceramic layers are stacked on one another in the thickness direction not to overlap non-etched sides from among the plurality of sides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.