Patent ID: 8152984

Claim:
A method of manufacturing a nozzle plate having a nozzle hole which ejects liquid, comprising the steps of; (a) forming the nozzle hole penetrating through an opaque and conductive plate which becomes the nozzle plate, in a thickness direction of the plate; (b) covering, with a first light-curable resin, a first surface of the plate which surface has one opening of the nozzle hole to become an ejection opening, and supplying the first light-curable resin into an area inside the nozzle hole contiguous to the one opening; (c) forming a cured resin portion from the first light-curable resin by applying, to the plate, light directed from a second surface of the plate having an another opening of the nozzle hole to the first surface of the plate so as to cure a part of the first light-curable resin inside the nozzle hole and another part of the light-curable resin outside the nozzle hole, the another part overlapping the one opening in a direction from the second surface to the first surface; (d) eliminating an uncured portion of the first light-curable resin after the step of (c); (e) covering the second surface of the plate with a second light-curable resin after the step of (d); (f) covering the second light-curable resin with a light-shielding member having an annular light-shielding region which encloses the another opening therein in a plan view; (g) curing a portion of the second light-curable resin not overlapping the light-shielding region by applying light directed from the second surface to the first surface, to the second light-curable resin with interposition of the light-shielding member, after the step of (f); (h) exposing the second light-curable resin by removing the light-shielding member after the step of (g); (i) eliminating an uncured portion of the second light-curable resin after the step of (h); (j) forming a water-repellent coat respectively on the first and second surfaces using the cured first and second light-curable resins as masks, by electroplating with a current density of greater than or equal to 0.5 A/dm 2 but less than or equal to 2 A/dm 2 , after the steps of (d) and (i); and (k) eliminating the cured first and second light-curable resins after the step of (j).