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:
Oct. 24, 2023
Filed:
Feb. 24, 2021
Applicant:
Seiko Epson Corporation, Toyko, JP;
Inventor:
Koji Ohashi, Matsumoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/047 (2006.01); H10N 30/87 (2023.01); B06B 1/02 (2006.01); B41J 2/14 (2006.01); A61B 8/14 (2006.01); A61B 8/00 (2006.01); B06B 1/06 (2006.01); B41J 2/16 (2006.01); A61B 8/08 (2006.01); A61B 8/06 (2006.01); H10N 30/077 (2023.01); H10N 30/082 (2023.01); H10N 30/80 (2023.01); H10N 30/20 (2023.01); G01N 29/24 (2006.01); H10N 30/853 (2023.01);
U.S. Cl.
CPC ...
H10N 30/875 (2023.02); A61B 8/06 (2013.01); A61B 8/085 (2013.01); A61B 8/145 (2013.01); A61B 8/4281 (2013.01); A61B 8/4427 (2013.01); A61B 8/4444 (2013.01); A61B 8/4488 (2013.01); A61B 8/4494 (2013.01); B06B 1/0207 (2013.01); B06B 1/0622 (2013.01); B06B 1/0666 (2013.01); B41J 2/14233 (2013.01); B41J 2/14274 (2013.01); B41J 2/161 (2013.01); B41J 2/1628 (2013.01); H10N 30/077 (2023.02); H10N 30/082 (2023.02); H10N 30/2047 (2023.02); H10N 30/802 (2023.02); H10N 30/87 (2023.02); B06B 2201/76 (2013.01); G01N 29/2437 (2013.01); H10N 30/8554 (2023.02); H10N 30/877 (2023.02);
Abstract
A piezoelectric element includes a first electrode layer, a piezoelectric layer, and a second electrode layer. The first electrode layer, the piezoelectric layer, and the second electrode layer are stacked in sequence on one another. The first electrode layer has a first part overlapping the piezoelectric layer in a plan view, and a second part at least partially separated from the first part and not overlapping the piezoelectric layer in the plan view. The second electrode layer has a third part overlapping the piezoelectric layer in the plan view, and a fourth part separated from the third part. The fourth part is in contact with the first part and the second part.