Patent ID: 8067757
Filing Date: 2011-11-29
Classification: G03F

Abstract:
1. An extreme ultraviolet light source apparatus comprising: a main body including a supply section to which an extreme ultraviolet radiation seed is supplied, and an emission part configured to emit extreme ultraviolet light; an excitation unit provided in the main body and configured to generate a plasma by exciting the extreme ultraviolet radiation seed; an optical condensing unit provided in the main body and configured to converge extreme ultraviolet light, which is radiated from the plasma, at the emission part; a trap provided between the excitation unit and the optical condensing unit; a first positioning mechanism connected to the trap and configured to adjust at least one of a position and an angle of the trap; and a measuring unit configured to measure a far field distribution image of the plasma on the basis of the extreme ultraviolet light which is emitted from the emission part, thereby to operate the first positioning mechanism.