Patent ID: 8055376

Claim:
A substrate processing system having a processing unit for processing a substrate held substantially horizontally by a substrate holding device rotatable about a vertical axis, and capable of acquiring data on a wafer placing position on the substrate holding device, at which a substrate carrying unit places the substrate, beforehand, said substrate processing system comprising: a jig to be transferred to the substrate holding device by the substrate carrying unit; a measuring means for measuring centrifugal acceleration imparted to a measuring position on the jig when the substrate holding device holding the jig is rotated at a fixed angular velocity; an arithmetic means for calculating an eccentricity of the measuring position from a rotation center of the substrate holding device on a basis of the centrifugal acceleration measured by the measuring means; a position determining means for determining position of the rotation center of the substrate holding means on a basis of eccentricities of two substrate placing positions determined by changing the position of the jig on the substrate holding device, and a centrifugal acceleration imparted to or an eccentricity of a substrate placing position other than the two substrate placing positions; and a storage means for storing data on a position of a substrate where a center of the substrate coincides with the rotation center of the substrate holding device as data on a substrate placing position.