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:
Jul. 13, 2010
Filed:
Apr. 25, 2006
Kazuhiro Hayakawa, Kanagawa, JP;
Makoto Terui, Kanagawa, JP;
Kazuhiro Hayakawa, Kanagawa, JP;
Makoto Terui, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A base member for use in manufacturing an ink jet recording head, which includes a supply port, an ejection outlet, a liquid flow path for directing liquid supplied from the supply port to the ejection outlet, and an ejection pressure generating element, disposed in the liquid flow path, for ejecting the liquid. The supply port is formed as a through-opening in a substrate on which the ejection pressure generation element is provided. The base member includes a recessed portion formed on the side of the substrate provided with the ejection pressure generation element. The recessed portion extends from an edge of the supply port to a neighborhood of the ejection pressure generation element. A protection layer is provided at least on a portion of the substrate surface constituting the recessed portion.