Title:
PIEZOELECTRIC FILM
Document Type and Number:
WIPO Patent Application WO/2023/286544
Kind Code:
A1
Abstract:
Provided is a highly durable piezoelectric film capable of suppressing deterioration of acoustic characteristics due to a long period of use. A piezoelectric film comprising: a piezoelectric layer made of a polymer composite piezoelectric containing piezoelectric particles in a matrix including a polymer material; and electrode layers formed on both surfaces of the piezoelectric layer. If the smaller of a domain ratio X of c-domain and a-domain measured by X-ray diffractometry from one major surface side of the piezoelectric layer and a domain ratio Y of c-domain and a-domain measured by X-ray diffractometry from the other major surface side of the piezoelectric layer is 1.00, the other domain ratio is greater than or equal to 1.05.
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Inventors:
TAMADA YOSHINORI (JP)
Application Number:
PCT/JP2022/024811
Publication Date:
January 19, 2023
Filing Date:
June 22, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00
Domestic Patent References:
| WO2017018313A1 | 2017-02-02 | |||
| WO2020261877A1 | 2020-12-30 | |||
| WO2018216225A1 | 2018-11-29 |
Foreign References:
| JP2016225409A | 2016-12-28 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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