Patent ID: 7713429

Claim:
A method of manufacturing a nozzle plate, comprising the steps of: applying a protective sheet to a first surface of a nozzle plate in which nozzles are to be formed, the first surface being located on an ejection surface side; forming holes which pass through the nozzle plate and have bottoms inside the protective sheet, from a side of a second surface of the nozzle plate reverse to the first surface; filling a filling material into the holes, from the side of the second surface until the filling material reaches a part of the protective sheet beyond the thickness of the nozzle plate; peeling away the protective sheet after the filling step in which the filling material has been filled into the holes; forming a liquid-repelling film on the first surface of the nozzle plate after the peeling step while the filling material projects beyond the nozzle surface, such that the filing material projects beyond the liquid-repelling film having been formed; and removing the filling material after the liquid-repelling film forming step.