Title:
PIEZOELECTRIC FILM
Document Type and Number:
WIPO Patent Application WO/2022/210092
Kind Code:
A1
Abstract:
Provided is a durable piezoelectric film that can limit reduction in sound pressure even after a long time of use or after repeated use. The piezoelectric film comprises a piezoelectric material layer comprising a polymer composite piezoelectric material containing piezoelectric material particles in a matrix including a polymer material, and electrode layers formed on both surfaces of the piezoelectric material layer, wherein the skewness Rsk of a roughness curve for at least one surface of the piezoelectric material layer is -3.5 to 5.
Inventors:
NARUBAYASHI MISATO (JP)
Application Number:
PCT/JP2022/013147
Publication Date:
October 06, 2022
Filing Date:
March 22, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H01L41/083; H04R17/00; H01L41/09; H01L41/113; H01L41/18
Domestic Patent References:
| WO2012108433A1 | 2012-08-16 |
Foreign References:
| JP2014212307A | 2014-11-13 | |||
| JP2012198516A | 2012-10-18 | |||
| JP2009078505A | 2009-04-16 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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