The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Jan. 03, 2022
Applicant:
Korea Electronics Technology Institute, Seongnam-si, KR;
Inventors:
Assignee:
KOREA ELECTRONICS TECHNOLOGY INSTITUTE, Seongnam-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/047 (2006.01); H10N 30/20 (2023.01); H10N 30/50 (2023.01); H10N 30/87 (2023.01);
U.S. Cl.
CPC ...
H10N 30/871 (2023.02); H10N 30/20 (2023.02); H10N 30/50 (2023.02);
Abstract
A stack-type piezoelectric element is implemented with a reduced capacitance value without a reduction in displacement amount. The stack-type piezoelectric element includes a piezoelectric layer formed of a piezoelectric material, and electrode layers formed in and on the piezoelectric layer and including at least one internal electrode layer formed inside the piezoelectric layer. Each of the at least one internal electrode layer includes a plurality of split electrodes that are separated and arranged in a longitudinal direction. A piezoelectric actuator including the stack-type piezoelectric element is also provided.