Patent ID: 9332625
Filing Date: 2016-05-03
CPC Classification: G03F,H05G

Claim Text:
1. An extreme ultraviolet light source apparatus for generating plasma by applying a laser beam to a target material and entering extreme ultraviolet light radiated from the plasma into projection optics of exposure equipment, said apparatus comprising: a chamber in which the extreme ultraviolet light is generated; a target supply unit for supplying the target material into said chamber; a driver laser for applying the laser beam to the target material supplied by said target supply unit to generate the plasma; a collector mirror for collecting the extreme ultraviolet light radiated from the plasma; a positioning mechanism for positioning at least a part of said chamber in a predetermined location where an optical axis of the collected extreme ultraviolet light and an optical axis of the projection optics of said exposure equipment are aligned with each other; a movement mechanism for moving at least the part of said chamber positioned in the predetermined location between said predetermined location and a maintenance area; and a magnetic field generating unit includes a pair of magnets placed opposite to each other for trapping charged particles radiated from said plasma, said magnetic field generating unit being provided outside of a track on which at least the part of said chamber moves between said predetermined location and said maintenance area.