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:
Oct. 11, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Kazuhiro Asai, Kawasaki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A method of manufacturing a liquid ejection head includes forming a resist film on a first surface of a light-transmitting support having the first surface and a second surface being a back surface of the first surface; bonding a back side of the surface of the resist film to the support side on a substrate having a through hole so as to block the through hole; exposing the resist film with light transmitted from the second surface to the first surface of the support and forming a portion which is removable with a dissolving liquid and a portion which remains against the dissolving liquid on the resist film; immersing the substrate and the exposed resist film in the dissolving liquid, allowing the dissolving liquid to enter the through hole, and removing the removable portion; and peeling the support from the resist film from which the removable portion has been removed.