Patent ID: 7105074

Claim:
A substrate treating apparatus for performing a predetermined treatment of a substrate by supplying a treating solution thereto, said apparatus comprising: substrate support means for supporting said substrate in horizontal posture; a treating solution delivery nozzle having a solution discharge opening for delivering the treating solution to said substrate, said solution discharge opening being in form of a slit or a plurality of small perforations arranged in a lower surface of said treating solution delivery nozzle; horizontally moving means for moving said treating solution delivery nozzle horizontally relative to the substrate; and collecting vessel means defining a collecting opening for receiving said treating solution delivered from said treating solution delivery nozzle, said collecting opening being disposed below said treating solution delivery nozzle to be opposed to said solution discharge opening of said treating solution delivery nozzle, said collecting vessel means receiving and collecting part of the treating solution delivered from said treating solution delivery nozzle outwardly of said substrate; and further comprising: nozzle position detecting means for detecting positions of said treating solution delivery nozzle relative to said substrate; and collecting vessel moving means for moving said collecting vessel means longitudinally of said solution discharge opening in response to the positions of said treating solution delivery nozzle detected by said nozzle position detecting means; said collecting vessel means being movable longitudinally of said solution discharge opening by said collecting vessel moving means so as to follow peripheral edges of said substrate as spaced therefrom.