Patent ID: 8623152

Claim:
A method for processing a substrate, comprising: moving a substrate in a linear direction simultaneously between a processing face of an upper proximity head and a processing face of a lower proximity head; and as the substrate is moved in the linear direction simultaneously between the processing faces of the upper and lower proximity heads, generating a first meniscus of processing liquid between the processing face of the upper proximity head and a top surface of the substrate, and generating a second meniscus of processing liquid between the processing face of the lower proximity head and a bottom surface of the substrate, wherein the first meniscus is generated to have a first meniscus protrusion that extends in the linear direction in which the substrate is moved and is positioned on a trailing side of the first meniscus relative to the linear direction in which the substrate is moved, and wherein the first meniscus protrusion is centered on the substrate relative to a diameter of the substrate as measured perpendicular to the linear direction in which the substrate is moved.