Patent ID: 6484399
Filing Date: 2002-11-26
Classification: B41J,Y10T

Abstract:
A method for producing an ink jet recording head, equipped with an ink discharge port from which ink is discharged, and ink discharge port face which is a flat surface and on which the ink discharge port is arranged and a discharge energy generating element which generates energy for discharging the ink, and provided with a water-repellent processing layer having a partially hydrophilic portion in proximity to a water-repellent region around the ink discharge port in the ink discharge port face, comprising the following steps:forming a photosensitive water-repellent processing layer on the ink discharge port face, irradiating light onto a water-repellent forming region and a hydrophilic forming region in said water-repellent processing layer, to cure said layer, irradiating light only onto said hydrophilic forming region to reduce water repellancy of said water-repellent processing layer and to impart hydrophilicity to said hydrophilic forming region while maintaining the flat surface state of the discharge port face, and forming an opening, which constitutes a part of said ink discharge port, in said water-repellent processing layer by development.