Patent ID: 11869752
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A transfer method of transferring a focus ring, comprising:
transferring the focus ring onto a focus ring placing region surrounding a substrate placing region of a placing table on which a substrate is placed;
scanning a scanning range from the focus ring placed on the focus ring placing region to the substrate placing region with multiple optical elements each configured to output measurement light as output light and configured to receive reflected light;
calculating a positional relationship between the placing table and the focus ring placed on the focus ring placing region based on the reflected light in the scanning range; and
deciding a transfer position of the focus ring based on the positional relationship between the placing table and the focus ring placed on the focus ring placing region, which is calculated through the calculating of the positional relationship.