Patent ID: 7812329

Claim:
A flow management system for an extreme ultraviolet lithography apparatus, the system comprising: a first enclosing wall at least partially surrounding a first space; a system generating plasma in said first space, the plasma emitting extreme ultraviolet light; a second enclosing wall at least partially surrounding a second space; an elongated body at least partially surrounding a passageway and having a first open end allowing EUV light to enter the passageway from the first space and a second open end allowing EUV light to exit the passageway into the second space, the body having a shape establishing a location having a reduced cross-sectional area relative to the first and second ends, the passageway establishing fluid communication between said first and second spaces, said second space otherwise sealed from said first space; and a flow of gas exiting an aperture, the aperture positioned to introduce gas into the passageway at a position between the first end of the body and the location having a reduced cross-sectional area.