Patent ID: 7148973
Filing Date: 2006-12-12
Classification: G03F

Abstract:
1. A method applied to an exposure apparatus comprising a reflective projection optical system configured to project a pattern of a reflective reticle onto a substrate, a reticle stage configured to hold the reticle and to move, and a substrate stage configured to hold the substrate and to move, the apparatus configured to expose the substrate to extreme ultraviolet light via the reflective reticle and the reflective projection optical system, said method comprising: a first detection step of detecting a relative positional relationship between a reference mark on the reticle stage and a substrate alignment mark on the substrate stage via the reflective projection optical system, using an optical system that includes a lens and light that passes through the lens, wherein the substrate alignment mark to be detected in said first detection step is a chuck mark formed on a chuck configured to hold the substrate; a second detection step of detecting a relative positional relationship between the chuck mark and a substrate mark formed on the substrate; and a positioning step of positioning the reflective reticle and the substrate based on a detection obtained in said first detection step, wherein said positioning step positions the reflective article and the substrate based on detections obtained in said first and second detection steps.