Patent ID: 7811412

Claim:
A substrate processing apparatus operable to supply a fluid to a rotated substrate, the substrate processing apparatus operable to perform prescribed processing and comprising: a substrate holding/rotating element configured and operable to hold and to rotate said substrate; and an atmosphere blocking plate configured to be substantially the same in planar shape and size as said substrate holding/rotating element, being rotatably driven and being arranged oppositely and proximately to at least one entire major surface of said substrate when said substrate is held by said substrate holding/rotating element, and formed with a processing solution discharge port and a single inner gas discharge port operable to discharge a processing solution and gas to said surface of said substrate respectively, a tubular support cylinder supporting said atmosphere blocking plate to be rotatable and having a hollow portion therein; and a cylindrical inner shaft inserted into the hollow portion of said support cylinder; said inner shaft and said support cylinder arranged coaxially with each other, said processing solution discharge port and said single inner gas discharge port arranged on said inner shaft in plan view, with a center of said single inner gas discharge port arranged eccentrically to a center of said inner shaft; and an annular outer gas discharge port operable to discharge gas to said surface of said substrate held by said substrate holding/rotating element, the outer gas discharge port formed on said atmosphere blocking plate and interposed between an outer peripheral surface of said inner shaft and an inner peripheral surface of said support cylinder in plan view so as to continuously and annularly enclose said single inner gas discharge port.