Patent ID: 6481003
Filing Date: 2002-11-12
Classification: G03F

Abstract:
An alignment method for determining for each of N (N&gE;2) substrates, exposure position information for a plurality of areas on said substrates to which a pattern of a mask is transferred, comprising the steps of:detecting a plurality of marks formed on an nTH substrate (1&lE;n&lE;Nâˆ’1), and in order to determine exposure position information for a plurality of areas on said nTH substrate using a first model function, determining a first parameter, which relates to array of said plurality of areas on said substrate, and a second parameter, which relates to an error of an image formation relationship relative to said pattern of said mask in said area, of said first model function using position information of said detected marks, and detecting a plurality of marks formed on an (n+k)TH substrate (1&lE;k&lE;Nâˆ’n), and in order to determined exposure position information for a plurality of areas on said (n+k)TH substrate using said first model function, determining said first parameter using a second model function different from said first model function, and position information of marks detected on said (n+k)TH substrate, and using this together with the second parameter determined for said nTH substrate.