Patent ID: 8508713

Claim:
A lithographic projection apparatus in which a pattern is projected onto a substrate through a liquid confined to a space adjacent the substrate, the apparatus comprising: a projection system by which the pattern is projected onto the substrate; a liquid diverter in the space to promote liquid flow across the space from a first side of the space to a second side of the space, the first side and the second side being separated along a circumference of the space, the liquid diverter having an upper surface and a lower surface, the upper surface being provided such that the upper surface faces an end surface of the projection system and a gap is formed between the upper surface and the end surface of the projection system, and the lower surface being provided such that the substrate faces the lower surface and a gap is formed between the lower surface and the substrate when projecting the pattern onto the substrate; a liquid confinement member with which the liquid is confined to the space, the liquid confinement member including the liquid diverter; a liquid supply inlet from which the liquid is supplied to the gap between the upper surface and the end surface of the projection system; and an extraction port from which the supplied liquid is removed, wherein when projecting the pattern onto the substrate, the extraction port removes the liquid which comes from the gap between the upper surface of the liquid diverter and the end surface of the projection system, via the gap between the lower surface of the liquid diverter and the substrate, to a gap between the extraction port and the substrate.