Liquid feed nozzle, wet treatment, apparatus and wet treatment method

A wet treatment liquid feed apparatus for subjecting an object to a wet treatment therein, the wet treatment liquid feed apparatus comprising:

• a nozzle assembly including:
• an introducing pipe having an introducing port to introduce the wet treatment liquid at an end thereof;
• a discharging pipe having a discharging port to discharge the wet treatment liquid to outside the discharging pipe after the object has been subjected to the wet treatment;
• a crossing section formed by connecting another end of said introducing pipe and an end of said discharging pipe, respectively;
• and
• an opening section provided at a bottom of said crossing section and open to the object to be subjected to the wet treatment;
• and
• a pressure controller to control a difference between a pressure of the wet treatment liquid in contact with the object to be wet-treated and an atmospheric pressure to prevent the wet treatment liquid in contact with the object to subjected to the wet treatment via said opening section from flowing to outside said discharging pipe.