Patent ID: 11860546
Assignee: ASML NETHERLANDS B.V.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A fluid handling structure configured to confine immersion fluid to a region of a lithographic apparatus, the fluid handling structure comprising:
an aperture formed therein for the passage therethrough of a projection beam through the immersion fluid;
a first part comprising a first opening; and
a second part having a second opening configured to provide a fluid flow into or out of the region,
wherein relative movement between the first part and the second part is effective to cause the first opening, from being out of alignment with the second opening, into at least partial alignment with the first opening such that the fluid flow can pass through the at least partially aligned first and second openings, so as to change a position of the fluid flow into or out of the second part relative to the aperture.