Patent ID: 6529262
Filing Date: 2003-03-04
Classification: G03F

Abstract:
A system for performing lithography on a substantially spherical substrate having at least first and second portions to be exposed, wherein the first and second portions have differing orientations, the system comprising:a device for positioning the substantially spherical substrate so that one of the first or second portions can be exposed; a lense section having one or more lenses; a first light source for making a first light capable of exposing the substantially spherical substrate; a device for converting the first light into a first pattern, projecting the first pattern through the lense section, and exposing the first pattern onto the one of the first or second portions of the substantially spherical substrate; a second light source for making a second light, the second light not being capable of exposing the substantially spherical substrate; and an image sensor for using the second light to detect an alignment image from the substantially spherical substrate; whereby the alignment image is used to accommodate the projection of the first pattern onto the substantially spherical substrate so that the first pattern is properly aligned to the substantially spherical substrate.