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Title:
PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/075204
Kind Code:
A1
Abstract:
A piezoelectric element is provided which can reliably connect electrically to an electrode layer. This piezoelectric element has a piezoelectric layer, an electrode layer formed on both sides of the piezoelectric layer, and a protective layer laminated on the surface of the electrode layer on the side opposite of the polymer composite piezoelectric body, wherein the piezoelectric element has a hole passing from the surface to the electrode layer, and the protective layer has: a filling member which is formed from inside the hole on part of the surface of the protective layer, is connected electrically to the electrode layer and is formed from a conductive material; a conductive member which covers at least part of the filling member and which is electrically connected to the filling member; and a fixing member which fixes the conductive member.

Inventors:
KAGAWA YUSUKE (JP)
ASHIKAWA TERUO (JP)
HIRAGUCHI KAZUO (JP)
Application Number:
PCT/JP2020/035426
Publication Date:
April 22, 2021
Filing Date:
September 18, 2020
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
H04R17/00; H01L41/047; H01L41/083; H01L41/09; H01L41/113; H01L41/187
Domestic Patent References:
WO2017030045A12017-02-23
Foreign References:
JP2016015354A2016-01-28
JP2011249990A2011-12-08
JP2002186096A2002-06-28
JP2016015354A2016-01-28
Other References:
See also references of EP 4047952A4
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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