Patent ID: 7419316

Claim:
A developing treatment apparatus for performing a developing treatment for a substrate, comprising: a substrate holding member for holding the substrate; a cup provided around said substrate holding member for receiving liquid splashing from the substrate; an outer peripheral plate surrounding an outer peripheral portion of the substrate held on said substrate holding member to form a gap between said plate and the outer peripheral portion of the substrate; and gas blowout ports for forming a gas flow which flows on a rear face of the substrate held on said substrate holding member, from a central portion side of the substrate to the outer peripheral portion side of the substrate, and passes by a lower end portion side of the gap; wherein said outer peripheral plate has a horizontal portion and a vertical portion, further wherein a front face of the horizontal portion is placed flush with the front face of the substrate held on said substrate holding member, and the horizontal portion has a same thickness as a thickness of the substrate, and further wherein the vertical portion is located in said cup.