US 12,239,021 B2
Piezoelectric element, piezoelectric vibrator and manufacturing method thereof, and electronic device
Yuju Chen, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Sep. 27, 2021, as Appl. No. 17/486,743.
Claims priority of application No. 202011300621.3 (CN), filed on Nov. 18, 2020.
Prior Publication US 2022/0158078 A1, May 19, 2022
Int. Cl. H01L 41/047 (2006.01); H10N 30/05 (2023.01); H10N 30/063 (2023.01); H10N 30/87 (2023.01)
CPC H10N 30/063 (2023.02) [H10N 30/05 (2023.02); H10N 30/874 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A piezoelectric element, comprising a first electrode and a second electrode arranged on the first electrode, the second electrode being provided with an opening where the first electrode is exposed;
the piezoelectric element further comprising a piezoelectric structure, the piezoelectric structure comprising a first piezoelectric portion and a second piezoelectric portion arranged around the first piezoelectric portion, the first piezoelectric portion being arranged in the opening and in contact with the first electrode, and the second piezoelectric portion being arranged on a side of the second electrode away from the first electrode, wherein the second piezoelectric portion has orientation.