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:
Oct. 28, 2003
Filed:
Jan. 11, 2002
Ryoichi Yamamoto, Kanagawa, JP;
Seiichi Inoue, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An inkjet head is disclosed which an ink ejection unit and a plate including an ink ejection nozzle disposed in correspondence to the ink ejection unit. The plate contains fine particles that have a water-repellent function in at least a region near to a surface of the plate, the fine particles being dispersed therein. The plate is arranged by etching using at least two kinds of etching conditions which differ in magnitude relation between an etching rate of the fine particles in the region and an etching rate of portion of the plate excluding the fine particles in the region, to form the ink ejection nozzle and a surface of the plate in the vicinity of an ink ejection opening of the ink ejection nozzle. The fine particles, for example mainly comprises silicone. The surface of the plate formed by etching is a fine irregular surface where the fine particles are exposed, and an inner surface of the ink ejection nozzle formed by etching is a flat surface with no fine irregular portion.