US 12,245,514 B2
Vibration device and electronic apparatus
Kazuki Saito, Tokyo (JP); and Kaoru Kijima, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 17/604,463
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed May 12, 2020, PCT No. PCT/JP2020/018979
§ 371(c)(1), (2) Date Oct. 18, 2021,
PCT Pub. No. WO2020/230787, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 2019-090578 (JP), filed on May 13, 2019.
Prior Publication US 2022/0212230 A1, Jul. 7, 2022
Int. Cl. H10N 30/87 (2023.01); B06B 1/06 (2006.01); G06F 3/01 (2006.01)
CPC H10N 30/875 (2023.02) [B06B 1/0662 (2013.01); B06B 1/0651 (2013.01); G06F 3/016 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vibration device comprising:
a vibration plate having conductivity;
a piezoelectric element disposed on the vibration plate; and
a wiring member disposed to oppose the vibration plate via the piezoelectric element,
wherein the piezoelectric element includes:
a piezoelectric element body having a first main surface and a second main surface facing away from each other in an opposing direction of the vibration plate and the wiring member;
a first external electrode disposed on the first main surface and electrically connected to the vibration plate;
a second external electrode disposed on the second main surface and electrically connected to the wiring member,
wherein the vibration plate includes a first projection projecting toward the wiring member and electrically connected to the wiring member.