Title:
PIEZOELECTRIC FILM
Document Type and Number:
WIPO Patent Application WO/2022/209854
Kind Code:
A1
Abstract:
Provided is a highly durable piezoelectric film in which decreases in sound pressure can be suppressed even after repeated bending and stretching. The present invention comprises a piezoelectric body layer composed of a polymer composite piezoelectric body containing piezoelectric particles in a matrix that includes a polymer material, and electrode layers formed on both sides of the piezoelectric body layer, a plurality of recesses having a depth of 1 μm or more are provided on at least one surface of the piezoelectric body layer, the number density of the recesses is 100-1000/mm2, and the surface kurtosis Rku is 2.9-25.
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Inventors:
NARUBAYASHI MISATO (JP)
Application Number:
PCT/JP2022/011628
Publication Date:
October 06, 2022
Filing Date:
March 15, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; H01L41/18; H01L41/33
Domestic Patent References:
| WO2020261822A1 | 2020-12-30 | |||
| WO2017199634A1 | 2017-11-23 |
Foreign References:
| JP2013171981A | 2013-09-02 | |||
| JP2001085757A | 2001-03-30 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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