Title:
PIEZOELECTRIC FILM AND LAMINATED PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2022/190807
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a piezoelectric film that has good durability, is capable of outputting a sound with high sound pressure, and can also lower resistance in an electrode layer to suppress heat generation. The problem is solved by having: a piezoelectric body layer that includes piezoelectric body particles in a matrix comprising a polymer material; electrode layers respectively provided on both surfaces of the piezoelectric body layer; and an intermediate layer provided at least one of the spaces between the piezoelectric layer and electrode layers, wherein the intermediate layer includes carbon or further includes a metal, and also has a metal atom concentration of 30-90 atm% or a carbon atom concentration of 85-95 atm%.
Inventors:
TAMADA YOSHINORI (JP)
Application Number:
PCT/JP2022/006340
Publication Date:
September 15, 2022
Filing Date:
February 17, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; H01L41/047; H01L41/053; H01L41/083; H01L41/09; H01L41/18; H01L41/23; H01L41/257; H01L41/29
Domestic Patent References:
| WO2020261911A1 | 2020-12-30 | |||
| WO2020095812A1 | 2020-05-14 |
Foreign References:
| JPS57145499A | 1982-09-08 | |||
| JP2010045152A | 2010-02-25 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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