Patent Number: 052689514
Section: claims

1. Apparatus for exposure of lithography mask which employs radiation from an x-ray beam comprising: (a) a first, entrance collimating mirror in the path of said beam with a reflecting surface which is (concave) along its width and (concave) along its length, positioned to receive the fan of radiation from a synchrotron at a grazing angle and to collimate the X-rays,  (b) a second, flat grazing incidence mirror positioned to receive the X-rays reflected from the entrance mirror at a grazing angle, said second mirror having a reflecting surface maintained at predetermined angles, and  (c) means for controlling the direction of incidence of said x-rays upon said mask.  said means for controlling the direction of incidence of the x-rays upon said mask comprise means for linearly shifting said second mirror to scan said mask by linear shifting of said second mirror.  said means for controlling the direction of incidence of the x-rays upon said mask include means for altering the grazing angle of said second mirror during said linear shifting of said second mirror to alter vertical (z) axis phase errors. 2. Apparatus in accordance with claim 1 wherein 3. Apparatus in accordance with claim 2 wherein