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Patent Searching and Data


Title:
PIEZOELECTRIC BODY FILM, PIEZOELECTRIC BODY FILM PRODUCTION METHOD, AND PIEZOELECTRIC BODY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/171650
Kind Code:
A1
Abstract:
Provided are a piezoelectric body film capable of suppressing a drop in the piezoelectric constant d31, a piezoelectric body film production method, and a piezoelectric body device. This piezoelectric body film includes, as a piezoelectric material, a fluorine resin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, the piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and the extrapolated starting temperature for the contraction start being between 90°C and 115°C inclusive, as determined by TMA measurements. Between the piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100°C for 24 hours, the difference is 20% or less, relative to the piezoelectric constant d31 prior to heating for 24 hours.

Inventors:
SATO YUSUKE (JP)
TERASHIMA HISAAKI (JP)
SATO NOBUFUMI (JP)
KANNO KAZUYUKI (JP)
AITA KEIKO (JP)
Application Number:
JP2018/039056
Publication Date:
September 12, 2019
Filing Date:
October 19, 2018
Export Citation:
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Assignee:
KUREHA CORP (Postcode1038552, JP)
International Classes:
H01L41/193; B29C55/06; B29C71/02; G01N25/16; H01L41/257; H01L41/333; H01L41/45
Domestic Patent References:
WO2015064327A12015-05-07
Foreign References:
JP2015171100A2015-09-28
JP2015111640A2015-06-18
JP2014056915A2014-03-27
JP2011082931A2011-04-21
JP2008171935A2008-07-24
JPH0191412A1989-04-11
US20150322220A12015-11-12
US20160016369A12016-01-21
Attorney, Agent or Firm:
ONDA Makoto et al. (12-1, Ohmiya-cho 2-chome Gifu-sh, Gifu 31, 〒5008731, JP)
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