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Patent Searching and Data


Title:
PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2018/123354
Kind Code:
A1
Abstract:
A piezoelectric element 1 according to the present disclosure is provided with a laminate 2 in which a piezoelectric body 21 and an internal electrode 22 are alternatingly laminated, an external electrode 3 which is provided to a side face of the laminate 2 and is electrically connected to the internal electrode 22, and a lead wire 4 which is electrically connected to the external electrode 3. Furthermore, a reaction layer 5 of the external electrode 3 and the lead wire 4 is provided at the site where the external electrode 3 and the lead wire 4 join. The reaction layer 5 has a thickness which matches the lead wire 4 when viewed in a cross-section perpendicular to the axial direction of the lead wire 4, the thickness of the central section of the width being greatest. Stress caused by a difference in thermal expansion between the reaction layer 5 of the external electrode 3 and the lead wire 4 and neighboring members is thereby reduced, making it possible to suppress cracks.

Inventors:
ASAKURA YASUHIRO (JP)
Application Number:
PCT/JP2017/041775
Publication Date:
July 05, 2018
Filing Date:
November 21, 2017
Export Citation:
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Assignee:
KYOCERA CORP (JP)
International Classes:
H01L41/047; G01L1/16; H01L41/083; H01L41/113
Domestic Patent References:
WO2007097460A12007-08-30
Foreign References:
JP2012049426A2012-03-08
JPH08316394A1996-11-29
JP2013211417A2013-10-10
JPH0383952U1991-08-26
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