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:
Apr. 26, 2022
Filed:
Apr. 09, 2020
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Kazuya Kitada, Matsumoto, JP;
Masayuki Omoto, Chino, JP;
Hidemichi Furihata, Chino, JP;
Kazuhide Gomi, Suwa, JP;
Hidetoshi Tako, Chino, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/14 (2006.01); H01L 41/187 (2006.01); H01L 41/047 (2006.01);
U.S. Cl.
CPC ...
B41J 2/14233 (2013.01); H01L 41/0471 (2013.01); H01L 41/0472 (2013.01); H01L 41/0477 (2013.01); H01L 41/1873 (2013.01);
Abstract
A piezoelectric element includes: a first electrode provided on a base; a piezoelectric layer provided on the first electrode and containing a complex oxide which has a perovskite structure and contains potassium, sodium, and niobium; and a second electrode provided on the piezoelectric layer, in which the first electrode contains platinum, the first electrode is (111) preferentially oriented, and a platinum atom contained in the first electrode is bonded to an oxygen atom at an interface between the first electrode and the piezoelectric layer.