Patent ID: 11953837
Assignee: ASML NETHERLANDS B.V.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 12:
13. A method comprising:
placing a substrate on a substrate support, wherein:
the substrate comprises a support surface that is placed on the substrate support,
the support surface of the substrate is divided into predefined portions,
the predefined portions comprise at least one first portion and at least one second portion,
the at least one first portion having a first coefficient of friction being substantially uniform across the at least one first portion,
the at least one second portion having a second coefficient of friction being substantially uniform across the at least one second portion,
the second coefficient of friction is different to the first coefficient of friction, and
the substrate comprises a further surface opposite the support surface, the further surface comprising a first feature positioned opposite the at least one first portion and a second feature positioned opposite the at least one second portion;

measuring a location of the first feature and the second feature; and
estimating stress in the substrate due to the substrate support using the measured location of the first feature and the second feature.