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. 22, 2026
Filed:
Sep. 21, 2023
Fujifilm Corporation, Tokyo, JP;
FUJIFILM CORPORATION, Tokyo, JP;
Abstract
The piezoelectric element is a piezoelectric element including, on a substrate in the following order, a lower electrode layer, a piezoelectric film containing a perovskite-type oxide as a main component, and an upper electrode layer, in which at least a region of the upper electrode layer closest to a side of the piezoelectric film is composed of an oxide conductive layer containing In, and regarding an interface region between the piezoelectric film and the oxide conductive layer of the upper electrode layer, in an intensity profile of binding energy, which is acquired by an X-ray photoelectron spectroscopy measurement, a peak intensity ratio γ/α satisfies γ/α≤0.25, wherein α is a peak intensity of binding energy derived from a 3dorbital of In bonded to oxygen, and γ is a peak intensity of binding energy derived from a 3dorbital of In bonded to an OH group.