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

Claim 0:
1. A method of obtaining an array of a plurality of regions on a substrate, comprising:
calculating, 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;
extracting, a coefficient not less than a threshold value from the plurality of coefficients calculated in the calculating; and
obtaining, using a regression model including only the coefficient extracted in the extracting 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.