US 11,930,713 B2
Piezoelectric element and vibrating device
Yoshiki Ohta, Tokyo (JP); Hideya Sakamoto, Tokyo (JP); Kazushi Tachimoto, Tokyo (JP); Yoshikazu Shimura, Tokyo (JP); Tetsuyuki Taniguchi, Tokyo (JP); and Akihiro Takeda, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Apr. 3, 2019, as Appl. No. 16/373,749.
Claims priority of application No. 2018-072368 (JP), filed on Apr. 4, 2018.
Prior Publication US 2019/0312190 A1, Oct. 10, 2019
Int. Cl. H10N 30/50 (2023.01); H10N 30/20 (2023.01); H10N 30/87 (2023.01); H10N 30/88 (2023.01)
CPC H10N 30/508 (2023.02) [H10N 30/206 (2023.02); H10N 30/871 (2023.02); H10N 30/88 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A piezoelectric element comprising:
a piezoelectric body having a first main surface, a second main surface, and a side surface;
an electrode layer located inside the piezoelectric body; and
a reinforcing layer provided on the first main surface, wherein
the first main surface and the second main surface oppose each other,
the side surface extends in an opposing direction in which the first main surface and the second main surface oppose each other in such a way as to connect the first main surface and the second main surface,
the electrode layer is spaced apart from the side surface,
the first main surface is interposed between the electrode layer and the reinforcing layer,
when viewed from the opposing direction, the electrode layer has a corner, and
when viewed from the opposing direction, the reinforcing layer overlaps the corner.