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:
Jan. 19, 2021
Filed:
Sep. 07, 2018
Canon Kabushiki Kaisha, Tokyo, JP;
Jun Yamamuro, Yokohama, JP;
Kazuhiro Asai, Kawasaki, JP;
Keiji Matsumoto, Fukushima, JP;
Kunihito Uohashi, Yokohama, JP;
Keiji Watanabe, Kawasaki, JP;
Masahisa Watanabe, Yokohama, JP;
Tetsushi Ishikawa, Tokyo, JP;
Yasuaki Tominaga, Kawasaki, JP;
Manabu Otsuka, Kawasaki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a method of manufacturing a liquid ejection head, which is capable of patterning a dry film while suppressing deformation of the dry film caused by a pressure. The method of manufacturing a liquid ejection head includes: preparing a substrate including an ejection orifice member on a first surface; forming, on an ejection orifice surface of the ejection orifice member, a protection film having communicating holes for allowing ejection orifices to communicate to outside; closing an opening of a supply port on a second surface on a side opposite to the first surface of the substrate with a dry film; and patterning the dry film by irradiating the dry film with light under a state in which the protection film is formed on the ejection orifice surface.