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:
May. 14, 2024
Filed:
Dec. 01, 2021
Fujifilm Corporation, Tokyo, JP;
Kenichi Umeda, Ashigarakami-gun, JP;
Yukihiro Okuno, Ashigarakami-gun, JP;
Takami Arakawa, Ashigarakami-gun, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A piezoelectric element includes, in sequence, a substrate, a lower electrode layer, a growth control layer, a piezoelectric layer including a perovskite-type oxide containing lead as a main component of an A site, and an upper electrode layer. The growth control layer includes a metal oxide represented by MNO, where M is one or more metal elements capable of substituting for the A site of the perovskite-type oxide. When the electronegativity of M is X, 1.41X−1.05≤d≤A1·exp(−X/t1)+y0, where A1=1.68×10, t1=0.0306, and y0=0.59958. The perovskite-type oxide is represented by (Pbα)(ZrTiβ)O, where 0.5<a1/(b1+b2+b3)<1.07.