Patent ID: 6842500
Filing Date: 2005-01-11
Classification: G03F

Abstract:
1. An exposure apparatus for exposing with X-rays a pattern present on a mask onto a photosensitive substrate, comprising: a. an optical system having a plurality of reflective surfaces arranged in an optical path to receive the X-rays so as to guide the X-rays to the mask and to transfer the mask pattern onto the photosensitive substrate, b. a detection apparatus electrically connected to at least one of the reflective surfaces and designed to detect photoelectrically generated electrons from the at least one of the reflective surfaces when the at least one of the reflective surfaces is irradiated with the X-rays, and to provide a first output signal corresponding to an amount of the photoelectrically generated electrons detected; c. an exposure dose calculation apparatus, electrically connected to the detection apparatus, for calculating based on the first output signal, an exposure dose of the X-rays at the mask and capable of generating a second output signal corresponding to the exposure dose; and d. an X-ray limiting apparatus electrically connected to the exposure dose calculation apparatus, for controlling the illumination of the X-rays based on the second output signal.