Invention Grant
- Patent Title: Piezoelectric ceramic speaker using vibration sheet formed with piezoelectric ceramic
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Application No.: US15695993Application Date: 2017-09-05
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Publication No.: US10418542B2Publication Date: 2019-09-17
- Inventor: Gouki Watanabe , Takayuki Goto , Keiichi Hatano , Sumiaki Kishimoto , Yutaka Doshida
- Applicant: TAIYO YUDEN CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TAIYO YUDEN CO., LTD.
- Current Assignee: TAIYO YUDEN CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Law Offic of Katsuhiro Arai
- Priority: JP2013-232588 20131108; JP2014-119824 20140610
- Main IPC: H01L41/187
- IPC: H01L41/187 ; H01L41/43 ; C04B35/493 ; C04B35/64 ; H04R17/00 ; H04R31/00 ; C04B35/626

Abstract:
A piezoelectric ceramic speaker includes a piezoelectric element using a vibration sheet formed with piezoelectric ceramic having a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains, wherein the primary phase is constituted by ceramic grains expressed by a composition formula Pb {(Zr(1-a)Tia)x·(Ni1/3Nb2/3)y·(Zn1/3Nb2/3)z}O3 (where 0
Public/Granted literature
- US20170365772A1 PIEZOELECTRIC CERAMIC SPEAKER USING VIBRATION SHEET FORMED WITH PIEZOELECTRIC CERAMIC Public/Granted day:2017-12-21
Information query
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