Patent Number: 
Section: claims

1. An apparatus for generating extreme ultraviolet light by exciting a target material to turn the target material into plasma, the apparatus comprising:a frame;a chamber in which the extreme ultraviolet light is generated and in which a through-hole is formed;a target supply unit inserted through the through-hole and configured for supplying the target material into the chamber;a first connection member configured for connecting the frame and the chamber flexibly;a mechanism configured for fixing the target supply unit to the frame; anda second connection member for flexibly connecting the chamber, at the periphery of the through-hole, and the target supply unit, to seal the chamber, the second connection member being a flexible pipe. 2. The apparatus according to claim 1, wherein a coefficient of thermal expansion of at least one member of the frame is smaller than a coefficient of thermal expansion of at least one member of the chamber. 3. The apparatus according to claim 1, wherein the first connection member is an elastic member. 4. The apparatus according to claim 1, wherein at least a part of the frame is disposed outside the chamber. 5. The apparatus according to claim 1, further comprising a vacuum pump connected to the chamber via a fourth connection member, the fourth connection member being a flexible pipe. 6. An apparatus for generating extreme ultraviolet light by exciting a target material to turn the target material into plasma, the apparatus comprising:a frame to which a window is fixed;a chamber in which the extreme ultraviolet light is generated and in which a through-hole is formed;a target sensor for detecting, through the window, a trajectory of the target material supplied into the chamber;a first connection member configured for connecting the frame and the chamber flexibly;a mechanism configured for fixing the target sensor to the frame; anda second connection member for flexibly connecting the chamber, at the periphery of the through-hole, and the frame, at the periphery of the window, to seal the chamber, the second connection member being a flexible pipe. 7. An apparatus for generating extreme ultraviolet light by exciting a target material to turn the target material into plasma, the apparatus comprising:a frame a chamber in which the extreme ultraviolet light is generated and in which a through-hole is formed;a collector mirror, disposed inside the chamber, for collecting the extreme ultraviolet light generated inside the chamber;a first connection member configure for connecting the frame and the chamber flexibly;a fixing member, inserted through the through-hole, for fixing the collector mirror to the frame; anda second connection member for flexibly connecting the chamber, at the periphery of the through-hole, and the fixing member, to seal the chamber, the second connection member being a flexible pipe. 8. An apparatus for generating extreme ultraviolet light by exciting a target material to turn the target material into plasma, the apparatus comprising:a frame to which a window is fixed;a chamber in which the extreme ultraviolet light is generated and in which a through-hole is formed;an extreme ultraviolet light emission position sensor for detecting, through the window, energy of the extreme ultraviolet light generated inside the chamber;a first connection member configured for connecting the frame and the chamber flexibly;a mechanism configured for fixing the extreme ultraviolet light emission position sensor to the frame; anda second connection member for flexibly connecting the chamber, at the periphery of the through-hole, and the frame, at the periphery of the window, to seal the chamber, the second connection member being a flexible pipe. 9. A system for generating extreme ultraviolet light by exciting a target material to turn the target material into plasma, the system comprising:a frame;a chamber in which the extreme ultraviolet light is generated and in which a through-hole is formed;a target supply unit configured for supplying the target material into the chamber;a first connection member configured for connecting the frame and the chamber flexibly;a driver laser configured to output a laser beam, with which the target material supplied into the chamber from the target supply unit is irradiated;a mirror, disposed inside the chamber, for reflecting the laser beam in the chamber;a beam dump positioned to absorb the laser beam reflected by the mirror;a fixing member, inserted through the through-hole, for fixing the mirror to the frame; anda second connection member for flexibly connecting the chamber, at the periphery of the through-hole, and the fixing member, to seal the chamber, the second connection member being a flexible pipe.