Patent ID: 9556533
Date: 2017-01-31
CPC Classifications: C25D,H01L

Claim:
1. A substrate processing apparatus comprising: a control section; a processing tank configured to hold a processing liquid; a substrate holder configured to hold a substrate and bring the substrate into contact with the processing liquid in the processing tank; a plurality of inlet pipes connected to the processing tank, each of the plurality of inlet pipes comprising a mass flow controller and being configured to be switched therebetween; and a plurality of outlet pipes connected to the processing tank, each of the plurality of outlet pipes comprising a mass flow controller and being configured to be switched therebetween, and being configured to create a flow of the processing liquid along a surface of the substrate in the processing tank in a second direction different from a first direction of the flow of the processing liquid before a switching between the plurality of inlet pipes, and the control section being configured to control each of the mass flow controllers to change a flow rate of the processing liquid supplied by one of the plurality of inlet pipes to the surface of the substrate with time over 1 second to 10 seconds, upon the switching between the plurality of inlet pipes or a switching between the plurality of outlet pipes; and a pump configured to supply the processing liquid into the processing tank in a circulatory manner through the plurality of inlet pipes and the plurality outlet pipes.