Patent ID: 6973370

Claim:
A substrate processing apparatus including a processing unit for processing a substrate horizontally supported on a substrate support member rotatable about a vertical axis, wherein the apparatus has preacquired data of a substrate transfer position of a substrate transfer mechanism with respect to the substrate support member, the apparatus comprising: a camera unit for photographing a mark formed on a surface of a position aligning substrate, placed on the substrate support member by the substrate transfer mechanism; an operation unit for calculating an amount of misalignment between a center of the position aligning substrate and a center of rotation of the substrate support member by using position data of a center of locations of the mark photographed before and after rotating the substrate support member by an angle of 180 degrees, respectively; a determination unit for judging whether or not the position aligning substrate is aligned with the substrate support member from the amount of misalignment; an adjusting unit for repositioning the position aligning substrate by the substrate transfer mechanism to allow the center of the position aligning substrate to coincide with the center of rotation of the substrate support member if it is judged that the position aligning substrate is not aligned with the substrate support member; and a storage unit for storing position data of the substrate transfer mechanism when it is determined that the position aligning substrate is aligned with the center of the substrate support member.