Title:
PIEZOELECTRIC MICROPHONE
Document Type and Number:
WIPO Patent Application WO/2020/140570
Kind Code:
A1
Abstract:
Provided by the present invention is a piezoelectric microphone, comprising a substrate that is provided with a back cavity and a piezoelectric cantilever beam diaphragm that is fixed on the substrate; the piezoelectric cantilever beam diaphragm comprises a fixed end that is fixedly connected to the substrate and an active end that is connected to the fixed end and that is suspended above the back cavity; the piezoelectric microphone further comprises a support back plate, the support back plate comprising a supporting arm that is oppositely provided at an interval from the active end of the piezoelectric cantilever beam diaphragm as well as a fixing arm that fixes the supporting arm. Compared to the related technology, the stability of the piezoelectric microphone provided by the present invention is improved.
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Inventors:
DUAN LIAN (CN)
ZHANG RUI (CN)
ZHANG RUI (CN)
Application Number:
PCT/CN2019/113284
Publication Date:
July 09, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
International Classes:
H04R17/02
Foreign References:
| CN109803217A | 2019-05-24 | |||
| CN102158788A | 2011-08-17 | |||
| EP3070963A1 | 2016-09-21 | |||
| CN107484051A | 2017-12-15 |
Attorney, Agent or Firm:
GUANGZHOU YUEXIU JILY PATENT & TRADEMARK LAW OFFICE (CN)
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