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:
May. 11, 2021
Filed:
Dec. 10, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A liquid ejection head includes: a substrate in which a supply path which opens on a first surface and supplies an ejection liquid is formed; an insulating layer provided on the first surface of the substrate; an energy generating element provided on a surface of the insulating layer; an electric wiring layer electrically connected to the energy generating element and electrically insulated from the ejection liquid by the insulating layer; and an ejection orifice member which forms an ejection orifice and forms a flow path of the ejection liquid from an opening of the supply path to a formation position of the energy generating element. In the vicinity of the opening of the supply path, the insulating layer forms a recessed region by being dented closer to the substrate than the surface on which the energy generating element is provided or by being removed.