Patent ID: 7354869

Claim:
A method of substrate processing, comprising: preparing a substrate processing apparatus comprising a substrate holding mechanism to hold a target substrate to be processed having a first main face, and a chemical solution dispensing/sucking mechanism which comprises a chemical solution dispensing port to dispense a first chemical solution, and a chemical solution suction port to suck a chemical solution including the first chemical solution; placing the target substrate on the substrate holding mechanism so as to expose the first main face; preparing an auxiliary plate having a second main face, followed by laying out the auxiliary plate at a periphery of the target substrate such that the second main face is substantially flush with the first main face; supplying a second chemical solution onto the first main face and the second main face; dispensing the first chemical solution from the chemical solution dispensing port and sucking the first chemical solution and the second chemical solution through the chemical solution suction port, in a state in which the chemical solution dispensing port and the chemical solution suction port are brought into contact with the second chemical solution supplied on the second main face of the auxiliary plate; and while dispensing the first chemical solution from the chemical solution dispensing port and sucking the first chemical solution through the chemical solution suction port, scanning the chemical solution dispensing/sucking mechanism in a state in which the chemical solution dispensing port and the chemical solution suction port are opposed to the first main face of the target substrate, wherein said dispensing the first chemical solution from the chemical solution dispensing port and sucking the first chemical solution and the second chemical solution through the chemical solution suction port in the state in which the chemical solution dispensing port and the chemical solution suction port are brought into contact with the second chemical solution supplied on the second main face of the auxiliary plate includes dispensing and sucking the first chemical solution in a manner that the first chemical solution is precluded from coming into contact with the first main face of the target substrate.