Title:
PIEZOELECTRIC FILM
Document Type and Number:
WIPO Patent Application WO/2022/215524
Kind Code:
A1
Abstract:
The preset invention provides a piezoelectric film which has high piezoelectric performance. This piezoelectric film comprises: a piezoelectric layer that is composed of a polymer composite piezoelectric body which contains piezoelectric particles in a matrix that contains a polymer material; and electrode layers that are formed on both surfaces of the piezoelectric layer. With respect to this piezoelectric film, the piezoelectric particles contain lead zirconate titanate; and the ratio of the area of a region where Pb/(Pb + Zr) is 90% or more to the area of the lead zirconate titanate particles in a cross-section of the piezoelectric layer in the thickness direction is from 0.2% to 4%.
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Inventors:
IWAMOTO TAKAHIRO (JP)
TAHARA TOMOKO (JP)
TAHARA TOMOKO (JP)
Application Number:
PCT/JP2022/013437
Publication Date:
October 13, 2022
Filing Date:
March 23, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; H01L41/047; H01L41/187; H01L41/193; H01L41/29
Foreign References:
| JP2014212307A | 2014-11-13 | |||
| JP2005159042A | 2005-06-16 | |||
| JP2013251568A | 2013-12-12 | |||
| JP2007182353A | 2007-07-19 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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