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. 25, 2020
Filed:
Nov. 21, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Shinichiro Watanabe, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head includes a first substrate and a second substrate. The first substrate includes a pressure chamber communicating with an ejection port that ejects liquid, a diaphragm that forms part of a wall constituting the pressure chamber, and at least one piezoelectric element configured to generate energy for displacing the diaphragm to eject liquid through the ejection port. The second substrate has a cavity containing the piezoelectric element. The first substrate and the second substrate are joined together with an adhesive. A liquid repellent portion surrounding the piezoelectric element is disposed on a surface of the first substrate where the piezoelectric element is disposed.