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:
Jun. 26, 2012
Filed:
Feb. 26, 2009
Masaya Uyama, Kawasaki, JP;
Makoto Terui, Yokohama, JP;
Kazuhiro Hayakawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head includes a substrate, having a front surface and a back surface, provided on the front surface with an energy generating element for generating energy used for ejecting liquid; a supply port, provided so as to penetrate between the front surface and the back surface of the substrate, for supplying the liquid to the energy generating element; a first film provided on the front surface of the substrate; and a second film provided so as to coat a wall of the substrate defining the supply port. The first film and the second film surface-contact each other with respect to two directions substantially perpendicular to each other.