Patent ID: 7389585

Claim:
A method of manufacturing a liquid discharging head, comprising: (1) a step of laminating a positive type resist on a substrate provided with an energy generating element, and forming a first flow path pattern by the positive type resist; (2) a step of applying onto the positive type resist, a first nozzle-constituting resin layer which is a first negative type resist containing an optical cation polymerization staffing agent and having an epoxy resin as a chief component, and forming a second flow path pattern in exposed portions of the first nozzle-constituting resin layer by exposure and baking; (3) a step of applying onto the first nozzle-constituting resin layer, a second nozzle-constituting resin layer which is a second negative type resist containing an optical cation polymerization starting agent and having an epoxy resin as a chief component, and forming a discharge port pattern in exposed portions of the second nozzle-constituting resin layer by exposure and baking; (4) a step of collectively developing unexposed portions on the first and second nozzle-constituting resin layers; and (5) a step of removing the first flow path pattern formed at said step of laminating the positive type resist, wherein the second flow path pattern is larger than the discharge port pattern.