Patent ID: 7591900

Claim:
A nozzle for supplying a treatment liquid comprising: two parts bonded to each other; a slit-shaped ejection hole which opens at the bottom of the two bonded parts; and a supply passage for the treatment liquid which leads to the slit-shaped ejection hole, wherein projections are provided on an abutting surface of at least one of the two parts so as to divide the treatment liquid flowing downward through the supply passage to the left and right directions; wherein the supply passage is comprised of a horizontal passage in which a supply hole for the treatment liquid is provided and a plurality of vertical passages which are distributed from the horizontal passage downward, and the projections are provided in the plurality of vertical passages wherein said projections are disposed in vertically spaced locations within each of said plurality of vertical passages; and wherein the directions of the treatment liquid flowing through the supply passage is controlled by the shape of the projections.