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:
Feb. 17, 2026
Filed:
Mar. 06, 2024
Seiko Epson Corporation, Tokyo, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
There is provided a liquid discharge head including: a piezoelectric element; a pressure chamber substrate provided with a pressure chamber; and a vibration plate configured to apply a pressure to a liquid in the pressure chamber, in which the vibration plate includes an elastic film and an insulating film, the elastic film is provided in each of an active region and an inactive region of the vibration plate, and the insulating film is provided in the active region of the vibration plate and is not provided in a part of the inactive region of the vibration plate, and Y<4.0X+4800, where a compressive stress is represented as a negative value, a tensile stress is represented as a positive value, a film stress of the insulating film is X [MPa], and a film stress of the elastic film is Y [MPa].