Patent ID: 7513041

Claim:
A method for producing a nozzle plate, comprising: pressing a substrate with using a metal mold part that includes: a taper portion having a truncated-cone shape; a truncated conical portion; and a curved-surface portion connecting the taper portion and the truncated conical portion, to form the substrate with a taper hole portion, a truncated conical hole portion, and a curved-surface hole portion connecting the taper hole portion and the truncated conical hole portion, which correspond to the taper portion, the truncated conical portion, and the curved-surface portion, respectively; and thereafter, removing a surface layer of the substrate, the surface layer including at least the truncated conical hole portion of the substrate, a portion of the substrate that surrounds the truncated conical hole portion, and a portion of the substrate that forms a bottom of the truncated conical hole portion.