Title:
PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2022/196202
Kind Code:
A1
Abstract:
Provided is a piezoelectric element comprising a laminate of a plurality of piezoelectric films, the piezoelectric element preventing generation of wrinkles. The piezoelectric element has a configuration in which a plurality of layers of piezoelectric films are laminated, each piezoelectric film comprising a piezoelectric body layer sandwiched between electrode layers, the piezoelectric body layer including, in a matrix containing a polymer material, piezoelectric body particles, and the piezoelectric film having a protection layer laminated on a surface of the electrode layer which is not in contact with the piezoelectric body layer, the adjacent piezoelectric films being affixed together by means of an affixing layer, wherein the difference between a maximum height of the piezoelectric films in a thickness direction in a region thereof from an end face to 43 μm on the inside and a height in the thickness direction at the position 43 μm on the inside from the end face is less than or equal to 4.2 μm.
Inventors:
OHARA NAOHIRO (JP)
Application Number:
PCT/JP2022/005416
Publication Date:
September 22, 2022
Filing Date:
February 10, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; H01L41/083; H01L41/09; H01L41/18; H01L41/338
Domestic Patent References:
| WO2020095812A1 | 2020-05-14 |
Foreign References:
| JP2020065042A | 2020-04-23 | |||
| JP2010089496A | 2010-04-22 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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