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. 09, 2025
Filed:
Mar. 15, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Tetsushi Ishikawa, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a method for manufacturing an element substrate for use in a liquid ejection head for ejecting a liquid to a recording medium. The element substrate, includes: a substrate having a nozzle including an ejection port, and a pressure generating chamber communicating with the nozzle, and subjected to a liquid repellent treatment on a part of a surface on a side opposed to the recording medium; and a generating element for generating an energy for ejecting the liquid. The method for manufacturing an element substrate includes: a liquid repellent treatment step of performing the liquid repellent treatment on the substrate; and a liquid repellent region removing step of removing a part of a liquid repellent region subjected to the liquid repellent treatment so that a non-liquid repellent region not subjected to the liquid repellent treatment is exposed at a surface of the substrate opposed to the recording medium.