Patent ID: 7566365

Claim:
A liquid processing apparatus for forming a coating film on a polygonal substrate by spin coating in an ambient with a descending clean air flow, comprising: a spin chuck including a support plate for substantially horizontally supporting the substrate thereon, the support plate rotating the substrate in a substantially horizontal plane; a cup disposed around the substrate supported on the support plate; an exhaust unit for evacuating an inside of the cup; a supply nozzle for supplying a coating solution to a top surface of the substrate supported on the support plate; and at least one air flow control member provided on the support plate, the air flow control member being disposed adjacent to a periphery of the polygonal substrate supported on the support plate, wherein the air flow control member is not provided near corner portions of the substrate supported on the support plate, wherein the support plate has a generally polygonal shape corresponding to the substrate, and is provided with cutout at corners thereof, the corner portions of the substrate outwardly protruding from the support plate through the cutout portions thereof when the substrate is supported on the support plate, and wherein the liquid processing apparatus further comprises a single body transfer arm having a number of support extrusions for supporting the corner portions of the substrates corresponding to the cutout portions of the support plate, respectively, wherein the transfer arm unloads the substrate from the support plate by supporting the protruded corner portions of the substrate by the support extrusions.