Title:
PIEZOELECTRIC FILM AND LAMINATED PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2022/202682
Kind Code:
A1
Abstract:
Provided is a piezoelectric film which can suppress a drop in sound pressure even if used repeatedly or for a long time. The present invention comprises: a piezoelectric layer comprising a polymer composite piezoelectric material containing piezoelectric particles in a matrix that comprises a polymer material; and electrode layers formed on the respective sides of the piezoelectric layer, wherein if a scratch test is carried out on the surface of the piezoelectric layer, the test exerting a vertical pressing force on the surface at a load of 3mN using an indenter having a tip radius of curvature of 1µm, the scratch depth is 0.3µm-3.2µm, inclusive.
Inventors:
ISHIDA JUMPEI (JP)
Application Number:
PCT/JP2022/012693
Publication Date:
September 29, 2022
Filing Date:
March 18, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; G01N3/46; H01L41/083; H01L41/09; H01L41/18
Domestic Patent References:
| WO2020261963A1 | 2020-12-30 |
Foreign References:
| JP2016033937A | 2016-03-10 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
Download PDF:
Previous Patent: ALLOY MATERIAL FOR PROBE PINS
Next Patent: THERMOSETTING COMPOSITION, ELECTRONIC DEVICE, AND METHOD FOR PRODUCING ELECTRONIC DEVICE
Next Patent: THERMOSETTING COMPOSITION, ELECTRONIC DEVICE, AND METHOD FOR PRODUCING ELECTRONIC DEVICE