Patent ID: 11594430

Abstract:
A substrate liquid processing apparatus A1 includes a processing tub 41 accommodating a processing liquid 43 and a substrate 8; a gas nozzle 70 discharging a gas into a lower portion within the processing tub 41; a gas supply unit 90 supplying the gas; a gas supply line 93 connecting the gas nozzle 70 with the gas supply unit 90; a decompression unit 95 introducing the processing liquid 43 within the processing tub 41 into the gas supply line 93 by decompressing the gas supply line 93; and a control unit 7 performing a first control of controlling the gas supply unit 90 to stop supply of the gas and controlling the decompression unit 95 to introduce the processing liquid 43 into the gas supply line 93 in a part of an idle period during which the substrate 8 is not accommodated in the processing tub 41.