Invention Grant
- Patent Title: Multilayer piezoelectric element, piezoelectric vibration apparatus, and electronic device
-
Application No.: US16039159Application Date: 2018-07-18
-
Publication No.: US11296272B2Publication Date: 2022-04-05
- Inventor: Sumiaki Kishimoto , Hiroyuki Shimizu , Tomohiro Harada , Yukihiro Konishi
- 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 Office of Katsuhiro Arai
- Priority: JPJP2017-141140 20170720,JPJP2018-045558 20180313
- Main IPC: H01L41/047
- IPC: H01L41/047 ; H01L41/083 ; H01L41/27 ; H01L41/187 ; H01L41/293 ; H01L41/09 ; B06B1/06

Abstract:
A multilayer piezoelectric element includes a ceramic base body, a pair of external electrodes, multiple internal electrodes, and surface electrodes. The ceramic base body is formed by a piezoelectric ceramic. The pair of external electrodes cover a pair of end faces. The multiple internal electrodes are stacked inside the ceramic base body along a thickness direction crossing at right angles with a longitudinal direction, and connected alternately to the pair of external electrodes in the thickness direction. The surface electrodes are provided on a pair of principal faces, respectively, and are each connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected. The pair of external electrodes have a higher porosity than the surface electrodes.
Public/Granted literature
- US20190027677A1 MULTILAYER PIEZOELECTRIC ELEMENT, PIEZOELECTRIC VIBRATION APPARATUS, AND ELECTRONIC DEVICE Public/Granted day:2019-01-24
Information query
IPC分类: