US 12,426,511 B2
Stack-type piezoelectric element and piezoelectric actuator including the same
Hyung Won Kang, Seoul (KR); Seung Ho Han, Gwacheon-si (KR); and In Tae Seo, Gwangju-si (KR)
Assigned to KOREA ELECTRONICS TECHNOLOGY INSTITUTE, Seongnam-si (KR)
Filed by KOREA ELECTRONICS TECHNOLOGY INSTITUTE, Seongnam-si (KR)
Filed on Jan. 3, 2022, as Appl. No. 17/567,676.
Claims priority of application No. 10-2021-0000038 (KR), filed on Jan. 2, 2021.
Prior Publication US 2022/0216391 A1, Jul. 7, 2022
Int. Cl. H01L 41/047 (2006.01); H10N 30/20 (2023.01); H10N 30/50 (2023.01); H10N 30/87 (2023.01)
CPC H10N 30/871 (2023.02) [H10N 30/20 (2023.02); H10N 30/50 (2023.02)] 6 Claims
OG exemplary drawing
 
1. A stack-type piezoelectric element comprising:
a piezoelectric layer comprising a piezoelectric material; and
a plurality of electrode layers that comprise an internal electrode layer formed inside the piezoelectric layer,
wherein the internal electrode layer has a length and comprises a plurality of split electrodes that are arranged in a direction of the length, and
wherein the internal electrode layer comprises a connection pattern connecting two adjacent split electrodes among the plurality of split electrodes.