Title:
PIEZOELECTRIC SPEAKER AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/189957
Kind Code:
A1
Abstract:
Disclosed are a piezoelectric speaker for employing a piezoelectric element having a through-hole, and a manufacturing method therefor. The piezoelectric speaker comprises: a piezoelectric element including a stack having one or more through-holes formed in a lower direction on the upper surface thereof, and electrodes formed on the stack; an adhesive layer arranged on a lower surface of the piezoelectric element; and a diaphragm attached to the piezoelectric element by means of the adhesive layer. The one or more through-holes are arranged so as to gradually reduce in size as same becomes further from the center of the piezoelectric element. The through-holes have a symmetrical arrangement on the basis of a central part, and the inside of the respective through-holes is curved at the corners thereof. The structure and the arrangement of the through-holes do not create cracks during a sintering process.
Inventors:
YOON MAN SOON (KR)
PARK YOUNG MIN (KR)
PARK YOUNG MIN (KR)
Application Number:
PCT/KR2020/003450
Publication Date:
September 24, 2020
Filing Date:
March 12, 2020
Export Citation:
Assignee:
ECO DM LAB CO LTD (KR)
International Classes:
H04R17/00; H01L41/27; H01L41/43; H04R31/00
Foreign References:
| KR20170015263A | 2017-02-08 | |||
| KR20140122848A | 2014-10-21 | |||
| JP2018107251A | 2018-07-05 | |||
| KR101783320B1 | 2017-10-10 | |||
| KR101630353B1 | 2016-06-24 |
Attorney, Agent or Firm:
E-SANG PATENT & TRADEMARK LAW FIRM (KR)
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