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:
Sep. 18, 2007
Filed:
Oct. 21, 2004
Keiichi Sasaki, Kanagawa, JP;
Masato Kamiichi, Kanagawa, JP;
Ershad Ali Chowdhury, Kanagawa, JP;
Yukihiro Hayakawa, Kanagawa, JP;
Keiichi Sasaki, Kanagawa, JP;
Masato Kamiichi, Kanagawa, JP;
Ershad Ali Chowdhury, Kanagawa, JP;
Yukihiro Hayakawa, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A circuit board for a liquid discharging apparatus in which coating performance of a protective layer and a cavitation resistive film on a heat generating element is excellent and durability is excellent and a manufacturing method of such a circuit board are provided. A surface portion of a wiring material layer is processed so that an etching speed of the surface portion is made higher than that of the material forming the wiring material layer. It is desirable to execute a process for forming at least one selected from a fluoride, a chloride, and a nitride of the material forming the wiring material layer into the surface portion of the wiring material layer.