Patent ID: 11881417
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A substrate processing apparatus for processing a substrate with a processing liquid, comprising:
a first supply liquid line in which a first supply liquid continuously flows;
a first concentration measurement part provided in said first supply liquid line, for measuring a dissolved concentration of a predetermined gas in said first supply liquid;
a second supply liquid line in which a second supply liquid continuously flows, wherein the second supply liquid has a dissolved concentration of said gas which is lower than that of said first supply liquid;
a second concentration measurement part provided in said second supply liquid line, for measuring a dissolved concentration of said gas in said second supply liquid;
a first processing liquid adjustment part for mixing said first supply liquid and said second supply liquid, to thereby generate a first processing liquid in which a dissolved concentration of said gas is adjusted;
a first substrate processing part for processing a first substrate by supplying said first substrate with said first processing liquid; and
a control part,
wherein said first processing liquid adjustment part comprises:
a first branch line in which said first supply liquid flows, wherein the first branch line comprises a first end that is directly connected to a first connection position on said first supply liquid line, and wherein said first connection position is upstream of the first concentration measurement part;
a second branch line in which said second supply liquid flows, wherein the second branch line comprises a first end that is directly connected to a second connection position on said second supply liquid line, and wherein said second connection position is upstream of the second concentration measurement part;
a first flow rate adjustment part provided in said first branch line or said second branch line; and
a mixing part to which a second end of said first branch line and a second end of said second branch line are connected, for mixing said first supply liquid and said second supply liquid, to generate said first processing liquid, and
said control part controls said first flow rate adjustment part on a basis of a measured value of said first concentration measurement part and a measured value of said second concentration measurement part so that a dissolved concentration of said gas in said first processing liquid becomes a set value.