| 主权项 |
1. A two-fluid nozzle for spraying, toward a processing target object, droplets of a processing solution which are formed by mixing the processing solution discharged from a liquid discharge portion and a gas discharged from a ring-shaped gas discharge opening formed on a lower surface of the two-fluid nozzle,
wherein the liquid discharge portion includes a plurality of spaced liquid discharge openings arranged along a circle inside the ring-shaped gas discharge opening, the plurality of spaced liquid discharge openings are inclined relative to the lower surface and are fluidly coupled to a liquid inlet opening, each of the plurality of spaced liquid discharge openings being configured to obliquely discharge the processing solution in an outward direction toward the ring-shaped gas discharge opening, a distance between adjacent liquid discharge openings among the plurality of the liquid discharge openings is set to be a distance allowing processing solutions discharged from the respective liquid discharge openings not to contact each other in a region under the liquid discharge portion until the processing solution discharged from the respective liquid discharge openings collide with the gas, a distance between each of the liquid discharge openings and the ring-shaped gas discharge opening is set to be a distance allowing processing solutions discharged from adjacent liquid discharge openings to be mixed with the gas while not being contacted with each other, the ring-shaped gas discharge opening is configured to discharge the gas in a downward direction, and the liquid discharge openings and the ring-shaped gas discharge opening are positioned on the lower surface of the two-fluid nozzle facing the processing target object, such that the droplets of the processing solution are formed outside of the two-fluid nozzle. |
