A METHOD TO AVOID STRIAE IN EUV LITHOGRAPHY MIRRORS

摘要

A method for manufacturing an EUV lithography element mirror includes sagging a plate of a glass material (41) to produce an EUV mirror blank (43) and polishing a top face of the EUV mirror blank (43) to produce a polished EUV mirror. A method for manufacturing an EUV lithography element mirror includes grinding a top face of a piece of a glass material (61); sagging a plate of the glass material over the top face of the piece (63) to produce an EUV mirror blank (66); and polishing a top face of the EUV mirror blank to produce an EUV polished mirror (65).