Patent ID: 11947267
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. An exposure apparatus for exposing a substrate via an original, comprising:
a processing unit configured to obtain an array of a plurality of regions on the substrate; and
a stage configured to position the substrate based on the array obtained by the processing unit,
wherein the processing unit:
calculates, using an objective function, which includes a loss function which includes, as variables, a plurality of coefficients included in a regression model used to estimate the array and obtains the plurality of coefficients and a regularization term used to limit values of the plurality of coefficients, and position measurement data of a mark assigned to a sample region among a plurality of regions on a first substrate, the plurality of coefficients included in the regression model, with which the objective function becomes not more than a reference value,
extracts a coefficient not less than a threshold value from the plurality of coefficients calculated in the calculating, and
obtains, using a regression model including only the extracted coefficient and position measurement data of a mark assigned to a sample region among a plurality of regions on a second substrate, an array of the plurality of regions on the second substrate.