Patent ID: 8122899

Claim:
A substrate treating apparatus comprising: a substrate support unit with a chuck on which a substrate is loaded; a bottom chamber having an open top and configured to surround the circumference of the chuck; a removable top chamber disposed over the bottom chamber, the top chamber configured to open or close the top of the bottom chamber such that a drying treatment for the substrate is performed while the substrate is isolated from the outside; an indirect injection nozzle installed at the top chamber and configured to inject drying fluid upwardly along an inclined first guide surface towards a central portion of the top chamber such that the drying fluid is indirectly injected to the substrate; wherein the top chamber comprises a second guide surface substantially parallel the first guide surface and inclined for gradually diffusing the drying fluid from a center of the substrate to an edge of the substrate, and the second guide surface at least partially disposed over a portion of the substrate; wherein the top chamber further comprises an upper space and a lower space, the upper space having an edge portion with a ring-shape and a central portion extending from the edge portion, and the indirect injection nozzle is installed at the edge portion for injecting the drying fluid toward the central portion, and wherein the lower space is formed below the upper space and a protrusive wall is disposed between the upper space and the lower space; and wherein a central aperture is formed between the central portion of the top chamber and the lower space such that drying fluid in the central portion flows to the lower space, and the central aperture comprises a smaller diameter than a top surface of the chuck.