Patent ID: 8205339

Claim:
A method for manufacturing a nozzle substrate comprising: forming a first hollow recess in a first surface of a silicon substrate; forming a liquid-resistant protective film having liquid-resistant properties on an entire surface of the first surface of the silicon substrate including an inner wall of the first hollow recess; forming a second hollow recess in a first surface of a glass substrate; bonding the first surface of the silicon substrate and the first surface of the glass substrate by anodic bonding so that the first hollow recess and the second hollow recess face each other; reducing a thickness of the glass substrate from a second surface of the glass substrate until an aperture is formed in a bottom surface of the second hollow recess to form a second nozzle hole disposed on a droplet feed side of the nozzle substrate; and reducing a thickness of the silicon substrate from a second surface of the silicon substrate until an aperture is formed in a bottom surface of the first hollow recess to form a first nozzle hole disposed on a droplet discharge side of the nozzle substrate.