Patent ID: 7901734

Claim:
A method of manufacturing a nozzle plate having nozzle orifices for ejecting liquid droplets, the method comprising the steps of: forming through holes in a nozzle forming substrate, each of the through holes passing through the nozzle forming substrate and having openings on a surface of a liquid droplet ejection side and a surface of a side opposite thereto of the nozzle forming substrate, the through holes having a larger diameter than the nozzle orifices; forming a liquid-philic film on inner walls of the through holes to the extent that each of the through holes is at least partially filled with the liquid-philic film: thereafter forming a liquid-repelling film on the surface of a liquid droplet ejection side of the nozzle forming substrate; and thereafter forming the nozzle orifices in each of the through holes that is at least partially filled with the liquid-philic film.