Patent ID: 8685763

Claim:
A method of manufacturing a nozzle plate, comprising: a mask pattern layer forming step of, with respect to a laminated substrate having a structure in which a first silicon substrate having a (111) surface orientation and a second silicon substrate having a (100) surface orientation are sequentially laminated on a surface of an oxide film, forming a frame-shaped mask pattern layer on the second silicon substrate, the frame-shaped mask pattern layer having a first opening section at a position where a nozzle is to be formed; a non-through hole forming step of forming a straight section of the nozzle in the first silicon substrate by forming a non-through hole that passes from the first opening section through the second silicon substrate and the first silicon substrate to the surface of the oxide film; a protective film forming step of forming a protective film over a first portion on the second silicon substrate that is not covered with the framed-shaped mask pattern layer, and over inner surfaces of the first and second silicon substrates defining the non-through hole; a mask pattern layer removal step of removing the framed-shaped mask pattern layer from the second silicon substrate and exposing a second portion on the second silicon substrate that has been covered with the framed-shaped mask pattern layer; an anisotropic etching step of performing anisotropic etching of the second silicon substrate from the second portion until reaching the first silicon substrate using the protective film as a mask, so as to form a tapered section of the nozzle, the tapered section being defined with {111} surfaces exposed in the second silicon substrate by the anisotropic etching, the tapered section being connected with the straight section and gradually narrowing toward the straight section; a protective film removal step of removing the protective film; and an opening exposure step of exposing an opening of the straight section at a side of the first silicon substrate adjacent to the oxide film.