Patent ID: 7760324

Claim:
A lithographic projection apparatus, comprising: a substrate table configured to support a substrate; a projection system configured to project a pattern from a patterning device onto a substrate, a liquid supply system configured to supply liquid in a space between an element of the projection system and the substrate; a metrology frame configured to support the projection system and attached to, and dynamically isolated from, a base frame that supports the apparatus; a shutter member positionable substantially to ensure that the liquid remains in contact with the element when the substrate is moved away from under the projection system; and an actuator configured to position the shutter member, wherein, in use, the actuator is connected to the metrology frame and the shutter member during projection of the pattern through the liquid onto the substrate, wherein the liquid supply system includes a seal member that is configured to confine liquid between the element and the substrate during the projection of the pattern through the liquid onto the substrate, and wherein the shutter member is positionable under the seal member to keep the liquid in contact with the element of the projection system without moving the substrate table.