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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.:

US 12685024 B1

PDFFull Text
Date of Patent:
Jul. 14, 2026

Filed:

Mar. 16, 2021

Piezoelectric stack, piezoelectric element, and method of manufacturing piezoelectric stack

Applicant:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Inventors:

Toshiaki Kuroda, Hitachi, JP;

Kenji Shibata, Hitachi, JP;

Kazutoshi Watanabe, Hitachi, JP;

Takeshi Kimura, Hitachi, JP;

Assignee:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Levi Gannon

Int. Cl.
CPC ...
H10N 30/079 (2023.01); C01G 9/03 (2006.01); C01G 33/00 (2006.01); C23C 14/02 (2006.01); C23C 14/08 (2006.01); C23C 14/16 (2006.01); C23C 14/35 (2006.01); H10N 30/00 (2023.01); H10N 30/076 (2023.01); H10N 30/50 (2023.01); H10N 30/853 (2023.01);
U.S. Cl.
CPC ...
H10N 30/8542 (2023.02); C01G 9/03 (2013.01); C01G 33/006 (2013.01); C23C 14/025 (2013.01); C23C 14/083 (2013.01); C23C 14/086 (2013.01); C23C 14/165 (2013.01); C23C 14/35 (2013.01); H10N 30/076 (2023.02); H10N 30/079 (2023.02); H10N 30/50 (2023.02); H10N 30/708 (2024.05); H10N 30/853 (2023.02); C01P 2002/34 (2013.01); C01P 2002/50 (2013.01); C01P 2006/40 (2013.01);
Abstract

There is provided a piezoelectric stack, including: a substrate; an oxide film on the substrate, containing zinc and oxygen as main elements; an electrode film on the oxide film; and a piezoelectric film on the electrode film, being an alkali niobium oxide film containing potassium, sodium, niobium, and oxygen and having a perovskite structure.

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Kuroda, Toshiaki. (2026). Piezoelectric stack, piezoelectric element, and method of manufacturing piezoelectric stack (U.S. Patent No. 12685024). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12685024

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