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. 09, 2025
Filed:
Dec. 01, 2021
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Kenichi Umeda, Ashigarakami-gun, JP;
Takamichi Fujii, Ashigarakami-gun, JP;
Yukihiro Okuno, Ashigarakami-gun, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10N 30/00 (2023.01); H10N 30/853 (2023.01);
U.S. Cl.
CPC ...
H10N 30/708 (2024.05); H10N 30/8554 (2023.02);
Abstract
A piezoelectric element includes, in sequence, a substrate, a lower electrode layer, a growth control layer, a piezoelectric layer including, as a main component, a perovskite-type oxide containing lead and an upper electrode layer. The growth control layer includes a metal oxide represented by MNO, where M is composed of one or more metal elements capable of substituting in the perovskite-type oxide, 0<d<1, and when the electronegativity is X, 1.41X−1.05≤d≤A1·exp(−X/t1)+y0, where A1=1.68×10, t1=0.0306, and y0=0.59958.