Patent ID: 9607844
Date: 2017-03-28
CPC Classifications: H01L

Claim:
1. A substrate processing method of performing processing using processing liquid on a substrate to be processed, the method comprising: a substrate holding step of holding the substrate in a horizontal position with a substrate holding and rotating mechanism; a processing liquid discharge step of introducing processing liquid from a fluid introduction portion of, in a processing liquid pipe in which a processing liquid nozzle having a discharge port at a tip end is provided at one end, the other end of the processing liquid pipe into the processing liquid pipe so as to discharge the processing liquid from the discharge port toward the substrate; a gas extrusion step of introducing, after stop of the processing liquid discharge step, a gas from the fluid introduction portion into the processing liquid pipe so as to extrude the processing liquid within the processing liquid pipe and within the processing liquid nozzle outwardly; and a gas introduction stop step of stopping, after the start of the introduction of the gas, the introduction of the gas into the processing liquid pipe in a state where the processing liquid is left within the processing liquid pipe and/or the processing liquid nozzle.