Invention Grant
- Patent Title: Piezoelectric ceramics, piezoelectric element, and electronic apparatus
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Application No.: US16425139Application Date: 2019-05-29
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Publication No.: US11647677B2Publication Date: 2023-05-09
- Inventor: Akira Uebayashi , Kanako Oshima , Makoto Kubota , Tatsuo Furuta , Yasushi Shimizu , Mikio Shimada , Chiaki Arii
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Venable LLP
- Priority: JP 2018110570 2018.06.08
- Main IPC: H01L41/18
- IPC: H01L41/18 ; H01L41/187 ; C04B35/49 ; C04B35/626 ; C04B35/634 ; C04B35/64 ; H01L41/047 ; H01L41/083 ; H04R17/02

Abstract:
Provided is a piezoelectric ceramics including crystal grains each including: a first region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at an asymmetrical position; and a second region that is formed of a perovskite-type metal oxide having a crystal structure in which a central element of a unit cell is located at a symmetrical position, and that is present inside the first region, wherein a ratio of a cross-sectional area of the second region to a cross-sectional area of the piezoelectric ceramics is 0.1% or less.
Information query
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