Method for producing ink jet recording head, and ink jet recording head produced by the same method

Abstract

The invention is directed to provide a method for producing an ink jet recording head, which is free from the problems produced by an inexpensive system, and excellent in discharge stability. The present invention provides a method for producing an ink jet recording head equipped with an ink discharge port from which the ink is discharged, ink discharge port face on which the ink discharge port is set and discharge energy generating element which generates energy necessary to discharge the ink, and is finished water-repellent in such a way to make the ink discharge port face hydrophilic partly around the ink discharge port, comprising the following steps, a step which forms the photosensitive water-repellent processing layer in the ink discharge port face, a step which irradiates light onto the water-repellent forming region and hydrophilic forming region in the water-repellent processing layer, to cure the layer, a step which irradiates light selectively onto the hydrophilic forming region to reduce water repellency of the water-repellent processing layer and to impart hydrophilicity to the hydrophilic forming region, and a step which forms an opening, which constitutes part of the ink discharge port, in the water-repellent processing layer.

Dependencies are inferred from the claim text.