Patent ID: 6590635
Filing Date: 2003-07-08
Classification: G03F

Abstract:
Apparatus for providing an imagewise exposed resist on a surface, the apparatus comprising:a) a light source and a surface coated with a resist, the resist convertible from an unexposed state to an exposed state by exposure to radiation from the light source, the resist having a non-linear exposure function; b) an image to be exposed on the resist, the image comprising a plurality of features, the features comprising features in a first set of features and features in a second set of features; c) means for illuminating the first set of features with light from the light source to image the first set of features onto the resist without converting the resist to the exposed state in areas corresponding to the second set of features; and, d) means for subsequently illuminating the second set of features with light from the light source to image the second set of features onto the resist.