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Title:
PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/131135
Kind Code:
A1
Abstract:
According to the present disclosure, a piezoelectric element the resonance point of which is shifted to the low-pitched sound side is provided. The inventors newly found that the resonant point of a piezoelectric element 1 is moved to the low-pitched sound side by a configuration in which the periphery of an active region 16 is surrounded by an inactive region 18 as in the case of the configuration of the piezoelectric element 1. This piezoelectric element 1 the resonance point of which is moved to the low-pitched sound side can achieve sound pressure that is sufficiently high for practical use when applied to an acoustic device.

Inventors:
SHIMURA Yoshikazu (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
KIJIMA Kaoru (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
SAKAMOTO Hideya (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
TACHIMOTO Kazushi (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
SASAKI Ryuhei (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
OHTA Yoshiki (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
TAKEDA Akihiro (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
Application Number:
JP2018/045707
Publication Date:
July 04, 2019
Filing Date:
December 12, 2018
Export Citation:
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Assignee:
TDK CORPORATION (2-5-1, Nihonbashi Chuo-k, Tokyo 28, 〒1036128, JP)
International Classes:
H04R17/00; H01L41/047; H01L41/083
Domestic Patent References:
WO2006073018A12006-07-13
Foreign References:
JP2015122438A2015-07-02
JP2015046947A2015-03-12
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (SOEI PATENT AND LAW FIRM, Marunouchi MY PLAZA 9th fl. 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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