Patent ID: 6233044
Filing Date: 2001-05-15
Classification: G03F

Abstract:
A process for producing a two-dimensional spatial pattern in a photosensitive material on a substrate comprising the steps of:effecting a first exposure of said photosensitive material using a first optical arrangement including a first illumination system for providing illumination of a first mask characterized by a first mask pattern and a first imaging system for imaging said first mask pattern onto said photosensitive material on said substrate, said first exposure having a first intensity pattern;effecting a second exposure of said photosensitive material using a second optical arrangement, said second exposure having a second intensity pattern;wherein each of said first and second intensity patterns, which provide first and second subsets of the spatial frequencies of said two-dimensional spatial pattern, are combined to define said two dimensional spatial pattern in said photosensitive material; and,processing said photosensitive material to instantiate said two-dimensional spatial pattern.