Title:
ELECTROACOUSTIC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2021/100428
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an electroacoustic converter having a diaphragm and a piezoelectric element, the electroacoustic converter making it possible to replace the piezoelectric element and prevent degradation of the piezoelectric element caused by moisture absorption. The above problem is solved by having: a diaphragm; a sealing member bonded to one principal surface of the diaphragm, the sealing member having gas barrier properties and being capable of being unsealed and closed up after unsealing; and a piezoelectric element sealed by the sealing member and bonded inside the sealing member so as to face the diaphragm, the piezoelectric element using a piezoelectric film provided with an electrode layer on both surfaces of a piezoelectric layer.
Inventors:
KAGAWA YUSUKE (JP)
HIRAGUCHI KAZUO (JP)
HIRAGUCHI KAZUO (JP)
Application Number:
PCT/JP2020/040455
Publication Date:
May 27, 2021
Filing Date:
October 28, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R7/04; H01L41/053; H01L41/09; H01L41/18; H04R17/00
Domestic Patent References:
| WO2018020887A1 | 2018-02-01 |
Foreign References:
| JP2012054299A | 2012-03-15 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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