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:
Nov. 16, 2021
Filed:
Mar. 25, 2020
Seiko Epson Corporation, Tokyo, JP;
Harunobu Koike, Matsumoto, JP;
Takanori Aimono, Matsumoto, JP;
Masao Nakayama, Shiojiri, JP;
Motoki Takabe, Shiojiri, JP;
Koji Sumi, Shiojiri, JP;
Yasuhiro Itayama, Kai, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid discharge head includes: a nozzle plate provided with a nozzle hole that discharges a liquid; a silicon substrate provided with a pressure chamber that is connected with the nozzle hole; a diaphragm provided on the silicon substrate; and a piezoelectric element that is provided on the diaphragm and that changes a volume of the pressure chamber, where: the diaphragm includes a zirconium oxide layer; the zirconium oxide layer has (−111) preferred orientation; and in X-ray diffraction of the diaphragm, a difference between a position of (002) peak of the zirconium oxide layer and a position of (220) peak of the silicon substrate is 13.26° or more and 13.30° or less.