Patent ID: 7695877
Filing Date: 2010-04-13
Classification: G03F

Abstract:
1. A method of lithographic processing with a lithographic processing system and a reticle, the method comprising: receiving values for the lithographic processing system parameters and for the reticle parameters, receiving focus conditions for the lithographic processing, the focus conditions comprising information expressing a critical dimension or line width as a function of focus for at least two different angles of incidence of the illumination beam with respect to the reticle and allowing separation of image performance effects due to lithographic processing system aberrations and image performance effects due to reticle shadowing effects, and determining image performance effects due to lithographic processing system aberrations and the image performance due to reticle shadowing effects separately by combining the information expressing a critical dimension or line width as a function of focus for at least two different angles of incidence of the illumination beam with respect to the reticle.