Patent Number: 6,637,868

Title: Inkjet head and method of manufacturing the same

Abstract: An inkjet head is disclosed which an ink ejection unit and a plateincluding an ink ejection nozzle disposed in correspondence to the inkejection unit. The plate contains fine particles that have awater-repellent function in at least a region near to a surface of theplate, the fine particles being dispersed therein. The plate is arrangedby etching using at least two kinds of etching conditions which differ inmagnitude relation between an etching rate of the fine particles in theregion and an etching rate of portion of the plate excluding the fineparticles in the region, to form the ink ejection nozzle and a surface ofthe plate in the vicinity of an ink ejection opening of the ink ejectionnozzle. The fine particles, for example mainly comprises silicone. Thesurface of the plate formed by etching is a fine irregular surface wherethe fine particles are exposed, and an inner surface of the ink ejectionnozzle formed by etching is a flat surface with no fine irregular portion.

Inventors: Yamamoto; Ryoichi (Kanagawa, JP), Inoue; Seiichi (Kanagawa, JP)


International Classification: B41J 2/14 (20060101); B41J 2/16 (20060101); B41J 002/045 (); B41J 002/135 (); B41J 002/14 (); B41J 002/16 ()

Expiration Date: 10/22015