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

Claim 7:
8. A substrate processing method in a substrate processing apparatus, wherein
said substrate processing apparatus comprises:
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 gas in said first supply liquid;
a second supply liquid line in which a second supply liquid continuously flows;
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 generating a first processing liquid in which a dissolved concentration of said gas is adjusted; and
a first substrate processing part for processing a first substrate by supplying said first substrate which said first processing liquid, and
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, and
said substrate processing method comprising:
a) measuring the dissolved concentration of said gas in said first supply liquid by said first concentration measurement part;
b) measuring the dissolved concentration of said gas in said second supply liquid by said second concentration measurement part;
c) generating said first processing liquid by mixing said first supply liquid and said second supply liquid in said mixing part;
d) controlling 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, in parallel with said operation c); and
e) supplying said first substrate with said first processing liquid in said first substrate processing part.