Patent ID: 8485640

Claim:
A nozzle plate, comprising: a silicon substrate made of single crystal silicon having a (100) surface orientation; and a nozzle hole formed in the silicon substrate for discharging a liquid droplet including: a first nozzle portion formed perpendicularly to a surface of the silicon substrate, the first nozzle portion having a first axis and a first cross-sectional area; a second nozzle portion formed perpendicular to the surface of the silicon substrate in the vicinity of the first nozzle portion, the second nozzle portion having the first axis and a second cross-sectional area that is larger than the first cross-sectional area of the first nozzle portion; and an inclined portion formed between the first nozzle portion and the second nozzle portion, the inclined portion having a third cross-sectional area gradually increasing from the first nozzle portion to the second nozzle portion, wherein at least four sides among sides shaping the second cross-sectional area of the second nozzle portion are parallel to a (111) crystal orientation of the single crystal silicon.