Title:
PIEZOELECTRIC FILM, PIEZOELECTRIC MULTILAYER BODY, PIEZOELECTRIC ELEMENT AND METHOD FOR PRODUCING PIEZOELECTRIC MULTILAYER BODY
Document Type and Number:
WIPO Patent Application WO/2021/177091
Kind Code:
A1
Abstract:
The present invention is a polycrystalline film which is formed of potassium sodium niobate and contains at least one metal element that is selected from the group consisting of Cu and Mn, wherein the ratio of the concentration B of the metal element at the grain boundaries of the crystals to the concentration A of the metal element in the matrix of the crystals is 1.0 or less.
Inventors:
KURODA TOSHIAKI (JP)
SHIBATA KENJI (JP)
WATANABE KAZUTOSHI (JP)
KIMURA TAKESHI (JP)
SHIBATA KENJI (JP)
WATANABE KAZUTOSHI (JP)
KIMURA TAKESHI (JP)
Application Number:
PCT/JP2021/006768
Publication Date:
September 10, 2021
Filing Date:
February 24, 2021
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
H01L41/187; H03H9/25
Domestic Patent References:
| WO2018180770A1 | 2018-10-04 |
Foreign References:
| JP2014179609A | 2014-09-25 | |||
| JP2017157830A | 2017-09-07 | |||
| JP2018207055A | 2018-12-27 | |||
| JP2007184513A | 2007-07-19 | |||
| JP2008159807A | 2008-07-10 |
Other References:
See also references of EP 4117047A4
Attorney, Agent or Firm:
FUKUOKA Masahiro et al. (JP)
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