LIQUID DISCHARGE HEAD AND MANUFACTURING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a liquid discharge head in which the surface of a discharge port forming member has excellent excoriation resistance and which shows high liquid repellent performance.SOLUTION: A liquid discharge head comprises a liquid repellent film 3 on a surface of a discharge port forming member 2, which is provided with a discharge port 7 that discharges liquid. The liquid repellent film 3 includes a layer including a resin composition which contains at least one of polyurethane and polyrotaxane formed on the discharge port forming member and a layer including a fluorine compound formed on the layer including the resin composition. The thickness of the layer including the fluorine compound is 10 nm or less, and the depth of a flaw in the liquid repellent film surface generated when a diamond chip having a tip diameter of 15μm as a damaging object is pressed against the liquid repellent film 3 with a load of 0.098 N (10 gf) and is reciprocatively slid ten times is equal to or less than the thickness of the layer including the fluorine compound.