Abstract:
PROBLEM TO BE SOLVED: To provide a method for cleaning elements of a lithographic device, for example, optical elements such as a collector mirror. SOLUTION: The method for cleaning the elements includes the steps of: providing a gas 155 containing nitrogen; generating nitrogen radicals from at least a part of the gas, thereby forming a radical containing gas 165; and providing at least a part of the radical containing gas to the one or more elements 100 of the apparatus. The lithographic apparatus includes a source and an optical element 100, and an electrical discharge generator 200 arranged so as to generate a radio frequency discharge. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for cleaning elements of a lithographic device, especially a method for cleaning one or more optical elements of the lithographic device. SOLUTION: This method for cleaning elements of the lithographic device, for example, optical elements such as a collector mirror, includes a step for supplying gas containing nitrogen, a step for forming a radical-containing gas by generating nitrogen radicals from at least a part of the gas containing nitrogen, and a step for supplying at least a part of the radical-containing gas to one or more elements of the lithographic device. The lithographic device comprises a source, an optical element and an electrical discharge generator arranged to generate a radio frequency discharge. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A method for cleaning elements of a lithographic apparatus, for example optical elements such as a collector mirror, includes providing a gas containing nitrogen; generating nitrogen radicals from at least part of the gas, thereby forming a radical containing gas; and providing at least part of the radical containing gas to the one or more elements of the apparatus. A lithographic apparatus includes a source and an optical element, and an electrical discharge generator arranged to generate a radio frequency discharge.