Patent ID: 9478395
Filing Date: 2016-10-25
CPC Classification: G03F,H01J

Claim Text:
1. A method of substrate lithography and/or inspection using charged particle beam columns, comprising the actions of: a) writing multiple edge block pattern-based Hadamard targets and multiple inner block pattern-based Hadamard targets onto the substrate using multiple first charged particle beams; b) first imaging said edge and inner Hadamard targets using said first beams; c) adding a resist layer to the substrate such that imaging said inner Hadamard targets is prevented and imaging said edge Hadamard targets is enabled; d) second imaging said edge Hadamard targets using multiple second charged particle beams; e) mapping location data of said edge Hadamard targets from said second imaging to said inner Hadamard targets in dependence on location data of said edge and inner Hadamard targets from said first imaging; f) calculating offsets for columns corresponding to said edge and inner Hadamard targets in at least partial dependence on said first and second imaging location data and said mapped location data; and g) writing and/or imaging multiple cut features on the substrate using said second beams, said features being targeted in at least partial dependence on said offsets, wherein individual ones of said beams are projected by individual ones of the columns, and different ones of the columns have different writing areas.